migrate from govendor to dep

vendor/github.com/mattn/go-sqlite3/.gitignore

@@ -1,3 +1,4 @@
 *.db
 *.exe
 *.dll
+*.o

vendor/github.com/mattn/go-sqlite3/.travis.yml

@@ -1,13 +1,19 @@
 language: go
 sudo: required
 dist: trusty
+env:
+  - GOTAGS=
+  - GOTAGS=libsqlite3
+  - GOTAGS=trace
+  - GOTAGS=vtable
 go:
-  - 1.5
-  - 1.6
-  - tip
+  - 1.7.x
+  - 1.8.x
+  - 1.9.x
+  - master
 before_install:
   - go get github.com/mattn/goveralls
   - go get golang.org/x/tools/cmd/cover
 script:
   - $HOME/gopath/bin/goveralls -repotoken 3qJVUE0iQwqnCbmNcDsjYu1nh4J4KIFXx
-  - go test -v . -tags "libsqlite3"
+  - go test -race -v . -tags "$GOTAGS"

vendor/github.com/mattn/go-sqlite3/README.md

@@ -1,9 +1,10 @@
 go-sqlite3
 ==========
 
+[![GoDoc Reference](https://godoc.org/github.com/mattn/go-sqlite3?status.svg)](http://godoc.org/github.com/mattn/go-sqlite3)
 [![Build Status](https://travis-ci.org/mattn/go-sqlite3.svg?branch=master)](https://travis-ci.org/mattn/go-sqlite3)
 [![Coverage Status](https://coveralls.io/repos/mattn/go-sqlite3/badge.svg?branch=master)](https://coveralls.io/r/mattn/go-sqlite3?branch=master)
-[![GoDoc](https://godoc.org/github.com/mattn/go-sqlite3?status.svg)](http://godoc.org/github.com/mattn/go-sqlite3)
+[![Go Report Card](https://goreportcard.com/badge/github.com/mattn/go-sqlite3)](https://goreportcard.com/report/github.com/mattn/go-sqlite3)
 
 Description
 -----------
@@ -16,11 +17,11 @@ Installation
 This package can be installed with the go get command:
 
     go get github.com/mattn/go-sqlite3
-    
+
 _go-sqlite3_ is *cgo* package.
 If you want to build your app using go-sqlite3, you need gcc.
 However, if you install _go-sqlite3_ with `go install github.com/mattn/go-sqlite3`, you don't need gcc to build your app anymore.
-    
+
 Documentation
 -------------
 
@@ -45,24 +46,39 @@ FAQ
 
    Use `go build --tags "icu"`
 
+   Available extensions: `json1`, `fts5`, `icu`
+
 * Can't build go-sqlite3 on windows 64bit.
 
-    > Probably, you are using go 1.0, go1.0 has a problem when it comes to compiling/linking on windows 64bit. 
-    > See: https://github.com/mattn/go-sqlite3/issues/27
+    > Probably, you are using go 1.0, go1.0 has a problem when it comes to compiling/linking on windows 64bit.
+    > See: [#27](https://github.com/mattn/go-sqlite3/issues/27)
 
 * Getting insert error while query is opened.
 
     > You can pass some arguments into the connection string, for example, a URI.
-    > See: https://github.com/mattn/go-sqlite3/issues/39
+    > See: [#39](https://github.com/mattn/go-sqlite3/issues/39)
 
 * Do you want to cross compile? mingw on Linux or Mac?
 
-    > See: https://github.com/mattn/go-sqlite3/issues/106
+    > See: [#106](https://github.com/mattn/go-sqlite3/issues/106)
     > See also: http://www.limitlessfx.com/cross-compile-golang-app-for-windows-from-linux.html
 
 * Want to get time.Time with current locale
 
-    Use `loc=auto` in SQLite3 filename schema like `file:foo.db?loc=auto`.
+    Use `_loc=auto` in SQLite3 filename schema like `file:foo.db?_loc=auto`.
+
+* Can I use this in multiple routines concurrently?
+
+    Yes for readonly. But, No for writable. See [#50](https://github.com/mattn/go-sqlite3/issues/50), [#51](https://github.com/mattn/go-sqlite3/issues/51), [#209](https://github.com/mattn/go-sqlite3/issues/209).
+
+* Why is it racy if I use a `sql.Open("sqlite3", ":memory:")` database?
+
+    Each connection to :memory: opens a brand new in-memory sql database, so if
+    the stdlib's sql engine happens to open another connection and you've only
+    specified ":memory:", that connection will see a brand new database. A
+    workaround is to use "file::memory:?mode=memory&cache=shared". Every
+    connection to this string will point to the same in-memory database. See
+    [#204](https://github.com/mattn/go-sqlite3/issues/204) for more info.
 
 License
 -------

vendor/github.com/mattn/go-sqlite3/_example/custom_func/main.go

@@ -0,0 +1,133 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"math"
+	"math/rand"
+
+	sqlite "github.com/mattn/go-sqlite3"
+)
+
+// Computes x^y
+func pow(x, y int64) int64 {
+	return int64(math.Pow(float64(x), float64(y)))
+}
+
+// Computes the bitwise exclusive-or of all its arguments
+func xor(xs ...int64) int64 {
+	var ret int64
+	for _, x := range xs {
+		ret ^= x
+	}
+	return ret
+}
+
+// Returns a random number. It's actually deterministic here because
+// we don't seed the RNG, but it's an example of a non-pure function
+// from SQLite's POV.
+func getrand() int64 {
+	return rand.Int63()
+}
+
+// Computes the standard deviation of a GROUPed BY set of values
+type stddev struct {
+	xs []int64
+	// Running average calculation
+	sum int64
+	n   int64
+}
+
+func newStddev() *stddev { return &stddev{} }
+
+func (s *stddev) Step(x int64) {
+	s.xs = append(s.xs, x)
+	s.sum += x
+	s.n++
+}
+
+func (s *stddev) Done() float64 {
+	mean := float64(s.sum) / float64(s.n)
+	var sqDiff []float64
+	for _, x := range s.xs {
+		sqDiff = append(sqDiff, math.Pow(float64(x)-mean, 2))
+	}
+	var dev float64
+	for _, x := range sqDiff {
+		dev += x
+	}
+	dev /= float64(len(sqDiff))
+	return math.Sqrt(dev)
+}
+
+func main() {
+	sql.Register("sqlite3_custom", &sqlite.SQLiteDriver{
+		ConnectHook: func(conn *sqlite.SQLiteConn) error {
+			if err := conn.RegisterFunc("pow", pow, true); err != nil {
+				return err
+			}
+			if err := conn.RegisterFunc("xor", xor, true); err != nil {
+				return err
+			}
+			if err := conn.RegisterFunc("rand", getrand, false); err != nil {
+				return err
+			}
+			if err := conn.RegisterAggregator("stddev", newStddev, true); err != nil {
+				return err
+			}
+			return nil
+		},
+	})
+
+	db, err := sql.Open("sqlite3_custom", ":memory:")
+	if err != nil {
+		log.Fatal("Failed to open database:", err)
+	}
+	defer db.Close()
+
+	var i int64
+	err = db.QueryRow("SELECT pow(2,3)").Scan(&i)
+	if err != nil {
+		log.Fatal("POW query error:", err)
+	}
+	fmt.Println("pow(2,3) =", i) // 8
+
+	err = db.QueryRow("SELECT xor(1,2,3,4,5,6)").Scan(&i)
+	if err != nil {
+		log.Fatal("XOR query error:", err)
+	}
+	fmt.Println("xor(1,2,3,4,5) =", i) // 7
+
+	err = db.QueryRow("SELECT rand()").Scan(&i)
+	if err != nil {
+		log.Fatal("RAND query error:", err)
+	}
+	fmt.Println("rand() =", i) // pseudorandom
+
+	_, err = db.Exec("create table foo (department integer, profits integer)")
+	if err != nil {
+		log.Fatal("Failed to create table:", err)
+	}
+	_, err = db.Exec("insert into foo values (1, 10), (1, 20), (1, 45), (2, 42), (2, 115)")
+	if err != nil {
+		log.Fatal("Failed to insert records:", err)
+	}
+
+	rows, err := db.Query("select department, stddev(profits) from foo group by department")
+	if err != nil {
+		log.Fatal("STDDEV query error:", err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var dept int64
+		var dev float64
+		if err := rows.Scan(&dept, &dev); err != nil {
+			log.Fatal(err)
+		}
+		fmt.Printf("dept=%d stddev=%f\n", dept, dev)
+	}
+	if err := rows.Err(); err != nil {
+		log.Fatal(err)
+	}
+}

vendor/github.com/mattn/go-sqlite3/_example/hook/hook.go

@@ -0,0 +1,78 @@
+package main
+
+import (
+	"database/sql"
+	"log"
+	"os"
+
+	"github.com/mattn/go-sqlite3"
+)
+
+func main() {
+	sqlite3conn := []*sqlite3.SQLiteConn{}
+	sql.Register("sqlite3_with_hook_example",
+		&sqlite3.SQLiteDriver{
+			ConnectHook: func(conn *sqlite3.SQLiteConn) error {
+				sqlite3conn = append(sqlite3conn, conn)
+				conn.RegisterUpdateHook(func(op int, db string, table string, rowid int64) {
+					switch op {
+					case sqlite3.SQLITE_INSERT:
+						log.Println("Notified of insert on db", db, "table", table, "rowid", rowid)
+					}
+				})
+				return nil
+			},
+		})
+	os.Remove("./foo.db")
+	os.Remove("./bar.db")
+
+	srcDb, err := sql.Open("sqlite3_with_hook_example", "./foo.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer srcDb.Close()
+	srcDb.Ping()
+
+	_, err = srcDb.Exec("create table foo(id int, value text)")
+	if err != nil {
+		log.Fatal(err)
+	}
+	_, err = srcDb.Exec("insert into foo values(1, 'foo')")
+	if err != nil {
+		log.Fatal(err)
+	}
+	_, err = srcDb.Exec("insert into foo values(2, 'bar')")
+	if err != nil {
+		log.Fatal(err)
+	}
+	_, err = srcDb.Query("select * from foo")
+	if err != nil {
+		log.Fatal(err)
+	}
+	destDb, err := sql.Open("sqlite3_with_hook_example", "./bar.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer destDb.Close()
+	destDb.Ping()
+
+	bk, err := sqlite3conn[1].Backup("main", sqlite3conn[0], "main")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	_, err = bk.Step(-1)
+	if err != nil {
+		log.Fatal(err)
+	}
+	_, err = destDb.Query("select * from foo")
+	if err != nil {
+		log.Fatal(err)
+	}
+	_, err = destDb.Exec("insert into foo values(3, 'bar')")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	bk.Finish()
+}

vendor/github.com/mattn/go-sqlite3/_example/limit/limit.go

@@ -0,0 +1,113 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/mattn/go-sqlite3"
+)
+
+func createBulkInsertQuery(n int, start int) (query string, args []interface{}) {
+	values := make([]string, n)
+	args = make([]interface{}, n*2)
+	pos := 0
+	for i := 0; i < n; i++ {
+		values[i] = "(?, ?)"
+		args[pos] = start + i
+		args[pos+1] = fmt.Sprintf("こんにちわ世界%03d", i)
+		pos += 2
+	}
+	query = fmt.Sprintf(
+		"insert into foo(id, name) values %s",
+		strings.Join(values, ", "),
+	)
+	return
+}
+
+func bukInsert(db *sql.DB, query string, args []interface{}) (err error) {
+	stmt, err := db.Prepare(query)
+	if err != nil {
+		return
+	}
+
+	_, err = stmt.Exec(args...)
+	if err != nil {
+		return
+	}
+
+	return
+}
+
+func main() {
+	var sqlite3conn *sqlite3.SQLiteConn
+	sql.Register("sqlite3_with_limit", &sqlite3.SQLiteDriver{
+		ConnectHook: func(conn *sqlite3.SQLiteConn) error {
+			sqlite3conn = conn
+			return nil
+		},
+	})
+
+	os.Remove("./foo.db")
+	db, err := sql.Open("sqlite3_with_limit", "./foo.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	sqlStmt := `
+	create table foo (id integer not null primary key, name text);
+	delete from foo;
+	`
+	_, err = db.Exec(sqlStmt)
+	if err != nil {
+		log.Printf("%q: %s\n", err, sqlStmt)
+		return
+	}
+
+	if sqlite3conn == nil {
+		log.Fatal("not set sqlite3 connection")
+	}
+
+	limitVariableNumber := sqlite3conn.GetLimit(sqlite3.SQLITE_LIMIT_VARIABLE_NUMBER)
+	log.Printf("default SQLITE_LIMIT_VARIABLE_NUMBER: %d", limitVariableNumber)
+
+	num := 400
+	query, args := createBulkInsertQuery(num, 0)
+	err = bukInsert(db, query, args)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	smallLimitVariableNumber := 100
+	sqlite3conn.SetLimit(sqlite3.SQLITE_LIMIT_VARIABLE_NUMBER, smallLimitVariableNumber)
+
+	limitVariableNumber = sqlite3conn.GetLimit(sqlite3.SQLITE_LIMIT_VARIABLE_NUMBER)
+	log.Printf("updated SQLITE_LIMIT_VARIABLE_NUMBER: %d", limitVariableNumber)
+
+	query, args = createBulkInsertQuery(num, num)
+	err = bukInsert(db, query, args)
+	if err != nil {
+		if err != nil {
+			log.Printf("expect failed since SQLITE_LIMIT_VARIABLE_NUMBER is too small: %v", err)
+		}
+	}
+
+	bigLimitVariableNumber := 999999
+	sqlite3conn.SetLimit(sqlite3.SQLITE_LIMIT_VARIABLE_NUMBER, bigLimitVariableNumber)
+	limitVariableNumber = sqlite3conn.GetLimit(sqlite3.SQLITE_LIMIT_VARIABLE_NUMBER)
+	log.Printf("set SQLITE_LIMIT_VARIABLE_NUMBER: %d", bigLimitVariableNumber)
+	log.Printf("updated SQLITE_LIMIT_VARIABLE_NUMBER: %d", limitVariableNumber)
+
+	query, args = createBulkInsertQuery(500, num+num)
+	err = bukInsert(db, query, args)
+	if err != nil {
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+
+	log.Println("no error if SQLITE_LIMIT_VARIABLE_NUMBER > 999")
+}

vendor/github.com/mattn/go-sqlite3/_example/mod_regexp/Makefile

@@ -0,0 +1,22 @@
+ifeq ($(OS),Windows_NT)
+EXE=extension.exe
+EXT=sqlite3_mod_regexp.dll
+RM=cmd /c del
+LDFLAG=
+else
+EXE=extension
+EXT=sqlite3_mod_regexp.so
+RM=rm
+LDFLAG=-fPIC
+endif
+
+all : $(EXE) $(EXT)
+
+$(EXE) : extension.go
+	go build $<
+
+$(EXT) : sqlite3_mod_regexp.c
+	gcc $(LDFLAG) -shared -o $@ $< -lsqlite3 -lpcre
+
+clean :
+	@-$(RM) $(EXE) $(EXT)

vendor/github.com/mattn/go-sqlite3/_example/mod_regexp/extension.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"github.com/mattn/go-sqlite3"
+	"log"
+)
+
+func main() {
+	sql.Register("sqlite3_with_extensions",
+		&sqlite3.SQLiteDriver{
+			Extensions: []string{
+				"sqlite3_mod_regexp",
+			},
+		})
+
+	db, err := sql.Open("sqlite3_with_extensions", ":memory:")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	// Force db to make a new connection in pool
+	// by putting the original in a transaction
+	tx, err := db.Begin()
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer tx.Commit()
+
+	// New connection works (hopefully!)
+	rows, err := db.Query("select 'hello world' where 'hello world' regexp '^hello.*d$'")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var helloworld string
+		rows.Scan(&helloworld)
+		fmt.Println(helloworld)
+	}
+}

vendor/github.com/mattn/go-sqlite3/_example/mod_regexp/sqlite3_mod_regexp.c

@@ -0,0 +1,31 @@
+#include <pcre.h>
+#include <string.h>
+#include <stdio.h>
+#include <sqlite3ext.h>
+
+SQLITE_EXTENSION_INIT1
+static void regexp_func(sqlite3_context *context, int argc, sqlite3_value **argv) {
+  if (argc >= 2) {
+    const char *target  = (const char *)sqlite3_value_text(argv[1]);
+    const char *pattern = (const char *)sqlite3_value_text(argv[0]);
+    const char* errstr = NULL;
+    int erroff = 0;
+    int vec[500];
+    int n, rc;
+    pcre* re = pcre_compile(pattern, 0, &errstr, &erroff, NULL);
+    rc = pcre_exec(re, NULL, target, strlen(target), 0, 0, vec, 500); 
+    if (rc <= 0) {
+      sqlite3_result_error(context, errstr, 0);
+      return;
+    }
+    sqlite3_result_int(context, 1);
+  }
+}
+
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+int sqlite3_extension_init(sqlite3 *db, char **errmsg, const sqlite3_api_routines *api) {
+  SQLITE_EXTENSION_INIT2(api);
+  return sqlite3_create_function(db, "regexp", 2, SQLITE_UTF8, (void*)db, regexp_func, NULL, NULL);
+}

vendor/github.com/mattn/go-sqlite3/_example/mod_vtable/Makefile

@@ -0,0 +1,24 @@
+ifeq ($(OS),Windows_NT)
+EXE=extension.exe
+EXT=sqlite3_mod_vtable.dll
+RM=cmd /c del
+LIBCURL=-lcurldll
+LDFLAG=
+else
+EXE=extension
+EXT=sqlite3_mod_vtable.so
+RM=rm
+LDFLAG=-fPIC
+LIBCURL=-lcurl
+endif
+
+all : $(EXE) $(EXT)
+
+$(EXE) : extension.go
+	go build $<
+
+$(EXT) : sqlite3_mod_vtable.cc
+	g++ $(LDFLAG) -shared -o $@ $< -lsqlite3 $(LIBCURL)
+
+clean :
+	@-$(RM) $(EXE) $(EXT)

vendor/github.com/mattn/go-sqlite3/_example/mod_vtable/extension.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+
+	"github.com/mattn/go-sqlite3"
+)
+
+func main() {
+	sql.Register("sqlite3_with_extensions",
+		&sqlite3.SQLiteDriver{
+			Extensions: []string{
+				"sqlite3_mod_vtable",
+			},
+		})
+
+	db, err := sql.Open("sqlite3_with_extensions", ":memory:")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	db.Exec("create virtual table repo using github(id, full_name, description, html_url)")
+
+	rows, err := db.Query("select id, full_name, description, html_url from repo")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var id, fullName, description, htmlURL string
+		rows.Scan(&id, &fullName, &description, &htmlURL)
+		fmt.Printf("%s: %s\n\t%s\n\t%s\n\n", id, fullName, description, htmlURL)
+	}
+}

vendor/github.com/mattn/go-sqlite3/_example/mod_vtable/sqlite3_mod_vtable.cc

@@ -0,0 +1,238 @@
+#include <string>
+#include <sstream>
+#include <sqlite3-binding.h>
+#include <sqlite3ext.h>
+#include <curl/curl.h>
+#include "picojson.h"
+
+#ifdef _WIN32
+# define EXPORT __declspec(dllexport)
+#else
+# define EXPORT
+#endif
+
+SQLITE_EXTENSION_INIT1;
+
+typedef struct {
+  char* data;   // response data from server
+  size_t size;  // response size of data
+} MEMFILE;
+
+MEMFILE*
+memfopen() {
+  MEMFILE* mf = (MEMFILE*) malloc(sizeof(MEMFILE));
+  if (mf) {
+    mf->data = NULL;
+    mf->size = 0;
+  }
+  return mf;
+}
+
+void
+memfclose(MEMFILE* mf) {
+  if (mf->data) free(mf->data);
+  free(mf);
+}
+
+size_t
+memfwrite(char* ptr, size_t size, size_t nmemb, void* stream) {
+  MEMFILE* mf = (MEMFILE*) stream;
+  int block = size * nmemb;
+  if (!mf) return block; // through
+  if (!mf->data)
+    mf->data = (char*) malloc(block);
+  else
+    mf->data = (char*) realloc(mf->data, mf->size + block);
+  if (mf->data) {
+    memcpy(mf->data + mf->size, ptr, block);
+    mf->size += block;
+  }
+  return block;
+}
+
+char*
+memfstrdup(MEMFILE* mf) {
+  char* buf;
+  if (mf->size == 0) return NULL;
+  buf = (char*) malloc(mf->size + 1);
+  memcpy(buf, mf->data, mf->size);
+  buf[mf->size] = 0;
+  return buf;
+}
+
+static int
+my_connect(sqlite3 *db, void *pAux, int argc, const char * const *argv, sqlite3_vtab **ppVTab, char **c) {
+  std::stringstream ss;
+  ss << "CREATE TABLE " << argv[0]
+    << "(id int, full_name text, description text, html_url text)";
+  int rc = sqlite3_declare_vtab(db, ss.str().c_str());
+  *ppVTab = (sqlite3_vtab *) sqlite3_malloc(sizeof(sqlite3_vtab));
+  memset(*ppVTab, 0, sizeof(sqlite3_vtab));
+  return rc;
+}
+
+static int
+my_create(sqlite3 *db, void *pAux, int argc, const char * const * argv, sqlite3_vtab **ppVTab, char **c) {
+  return my_connect(db, pAux, argc, argv, ppVTab, c);
+}
+
+static int my_disconnect(sqlite3_vtab *pVTab) {
+  sqlite3_free(pVTab);
+  return SQLITE_OK;
+}
+
+static int
+my_destroy(sqlite3_vtab *pVTab) {
+  sqlite3_free(pVTab);
+  return SQLITE_OK;
+}
+
+typedef struct {
+  sqlite3_vtab_cursor base;
+  int index;
+  picojson::value* rows;
+} cursor;
+
+static int
+my_open(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor) {
+  MEMFILE* mf;
+  CURL* curl;
+  char* json;
+  CURLcode res = CURLE_OK;
+  char error[CURL_ERROR_SIZE] = {0};
+  char* cert_file = getenv("SSL_CERT_FILE");
+
+  mf = memfopen();
+  curl = curl_easy_init();
+  curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 1);
+  curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 2);
+  curl_easy_setopt(curl, CURLOPT_USERAGENT, "curl/7.29.0");
+  curl_easy_setopt(curl, CURLOPT_URL, "https://api.github.com/repositories");
+  if (cert_file)
+    curl_easy_setopt(curl, CURLOPT_CAINFO, cert_file);
+  curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
+  curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, error);
+  curl_easy_setopt(curl, CURLOPT_WRITEDATA, mf);
+  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, memfwrite);
+  res = curl_easy_perform(curl);
+  curl_easy_cleanup(curl);
+  if (res != CURLE_OK) {
+    std::cerr << error << std::endl;
+    return SQLITE_FAIL;
+  }
+
+  picojson::value* v = new picojson::value;
+  std::string err;
+  picojson::parse(*v, mf->data, mf->data + mf->size, &err);
+  memfclose(mf);
+
+  if (!err.empty()) {
+    delete v;
+    std::cerr << err << std::endl;
+    return SQLITE_FAIL;
+  }
+
+  cursor *c = (cursor *)sqlite3_malloc(sizeof(cursor));
+  c->rows = v;
+  c->index = 0;
+  *ppCursor = &c->base;
+  return SQLITE_OK;
+}
+
+static int
+my_close(cursor *c) {
+  delete c->rows;
+  sqlite3_free(c);
+  return SQLITE_OK;
+}
+
+static int
+my_filter(cursor *c, int idxNum, const char *idxStr, int argc, sqlite3_value **argv) {
+  c->index = 0;
+  return SQLITE_OK;
+}
+
+static int
+my_next(cursor *c) {
+  c->index++;
+  return SQLITE_OK;
+}
+
+static int
+my_eof(cursor *c) {
+  return c->index >= c->rows->get<picojson::array>().size() ? 1 : 0;
+}
+
+static int
+my_column(cursor *c, sqlite3_context *ctxt, int i) {
+  picojson::value v = c->rows->get<picojson::array>()[c->index];
+  picojson::object row = v.get<picojson::object>();
+  const char* p = NULL;
+  switch (i) {
+  case 0:
+    p = row["id"].to_str().c_str();
+    break;
+  case 1:
+    p = row["full_name"].to_str().c_str();
+    break;
+  case 2:
+    p = row["description"].to_str().c_str();
+    break;
+  case 3:
+    p = row["html_url"].to_str().c_str();
+    break;
+  }
+  sqlite3_result_text(ctxt, strdup(p), strlen(p), free);
+  return SQLITE_OK;
+}
+
+static int
+my_rowid(cursor *c, sqlite3_int64 *pRowid) {
+  *pRowid = c->index;
+  return SQLITE_OK;
+}
+
+static int
+my_bestindex(sqlite3_vtab *tab, sqlite3_index_info *pIdxInfo) {
+  return SQLITE_OK;
+}
+
+static const sqlite3_module module = {
+  0,
+  my_create,
+  my_connect,
+  my_bestindex,
+  my_disconnect,
+  my_destroy,
+  my_open,
+  (int (*)(sqlite3_vtab_cursor *)) my_close,
+  (int (*)(sqlite3_vtab_cursor *, int, char const *, int, sqlite3_value **)) my_filter,
+  (int (*)(sqlite3_vtab_cursor *)) my_next,
+  (int (*)(sqlite3_vtab_cursor *)) my_eof,
+  (int (*)(sqlite3_vtab_cursor *, sqlite3_context *, int)) my_column,
+  (int (*)(sqlite3_vtab_cursor *, sqlite3_int64 *)) my_rowid,
+  NULL, // my_update
+  NULL, // my_begin
+  NULL, // my_sync
+  NULL, // my_commit
+  NULL, // my_rollback
+  NULL, // my_findfunction
+  NULL, // my_rename
+};
+
+static void
+destructor(void *arg) {
+  return;
+}
+
+
+extern "C" {
+
+EXPORT int
+sqlite3_extension_init(sqlite3 *db, char **errmsg, const sqlite3_api_routines *api) {
+  SQLITE_EXTENSION_INIT2(api);
+  sqlite3_create_module_v2(db, "github", &module, NULL, destructor);
+  return 0;
+}
+
+}

vendor/github.com/mattn/go-sqlite3/_example/simple/simple.go

@@ -0,0 +1,106 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	_ "github.com/mattn/go-sqlite3"
+	"log"
+	"os"
+)
+
+func main() {
+	os.Remove("./foo.db")
+
+	db, err := sql.Open("sqlite3", "./foo.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	sqlStmt := `
+	create table foo (id integer not null primary key, name text);
+	delete from foo;
+	`
+	_, err = db.Exec(sqlStmt)
+	if err != nil {
+		log.Printf("%q: %s\n", err, sqlStmt)
+		return
+	}
+
+	tx, err := db.Begin()
+	if err != nil {
+		log.Fatal(err)
+	}
+	stmt, err := tx.Prepare("insert into foo(id, name) values(?, ?)")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer stmt.Close()
+	for i := 0; i < 100; i++ {
+		_, err = stmt.Exec(i, fmt.Sprintf("こんにちわ世界%03d", i))
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+	tx.Commit()
+
+	rows, err := db.Query("select id, name from foo")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var id int
+		var name string
+		err = rows.Scan(&id, &name)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println(id, name)
+	}
+	err = rows.Err()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	stmt, err = db.Prepare("select name from foo where id = ?")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer stmt.Close()
+	var name string
+	err = stmt.QueryRow("3").Scan(&name)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(name)
+
+	_, err = db.Exec("delete from foo")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	_, err = db.Exec("insert into foo(id, name) values(1, 'foo'), (2, 'bar'), (3, 'baz')")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	rows, err = db.Query("select id, name from foo")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var id int
+		var name string
+		err = rows.Scan(&id, &name)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println(id, name)
+	}
+	err = rows.Err()
+	if err != nil {
+		log.Fatal(err)
+	}
+}

vendor/github.com/mattn/go-sqlite3/_example/trace/main.go

@@ -0,0 +1,264 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"os"
+
+	sqlite3 "github.com/mattn/go-sqlite3"
+)
+
+func traceCallback(info sqlite3.TraceInfo) int {
+	// Not very readable but may be useful; uncomment next line in case of doubt:
+	//fmt.Printf("Trace: %#v\n", info)
+
+	var dbErrText string
+	if info.DBError.Code != 0 || info.DBError.ExtendedCode != 0 {
+		dbErrText = fmt.Sprintf("; DB error: %#v", info.DBError)
+	} else {
+		dbErrText = "."
+	}
+
+	// Show the Statement-or-Trigger text in curly braces ('{', '}')
+	// since from the *paired* ASCII characters they are
+	// the least used in SQL syntax, therefore better visual delimiters.
+	// Maybe show 'ExpandedSQL' the same way as 'StmtOrTrigger'.
+	//
+	// A known use of curly braces (outside strings) is
+	// for ODBC escape sequences. Not likely to appear here.
+	//
+	// Template languages, etc. don't matter, we should see their *result*
+	// at *this* level.
+	// Strange curly braces in SQL code that reached the database driver
+	// suggest that there is a bug in the application.
+	// The braces are likely to be either template syntax or
+	// a programming language's string interpolation syntax.
+
+	var expandedText string
+	if info.ExpandedSQL != "" {
+		if info.ExpandedSQL == info.StmtOrTrigger {
+			expandedText = " = exp"
+		} else {
+			expandedText = fmt.Sprintf(" expanded {%q}", info.ExpandedSQL)
+		}
+	} else {
+		expandedText = ""
+	}
+
+	// SQLite docs as of September 6, 2016: Tracing and Profiling Functions
+	// https://www.sqlite.org/c3ref/profile.html
+	//
+	// The profile callback time is in units of nanoseconds, however
+	// the current implementation is only capable of millisecond resolution
+	// so the six least significant digits in the time are meaningless.
+	// Future versions of SQLite might provide greater resolution on the profiler callback.
+
+	var runTimeText string
+	if info.RunTimeNanosec == 0 {
+		if info.EventCode == sqlite3.TraceProfile {
+			//runTimeText = "; no time" // seems confusing
+			runTimeText = "; time 0" // no measurement unit
+		} else {
+			//runTimeText = "; no time" // seems useless and confusing
+		}
+	} else {
+		const nanosPerMillisec = 1000000
+		if info.RunTimeNanosec%nanosPerMillisec == 0 {
+			runTimeText = fmt.Sprintf("; time %d ms", info.RunTimeNanosec/nanosPerMillisec)
+		} else {
+			// unexpected: better than millisecond resolution
+			runTimeText = fmt.Sprintf("; time %d ns!!!", info.RunTimeNanosec)
+		}
+	}
+
+	var modeText string
+	if info.AutoCommit {
+		modeText = "-AC-"
+	} else {
+		modeText = "+Tx+"
+	}
+
+	fmt.Printf("Trace: ev %d %s conn 0x%x, stmt 0x%x {%q}%s%s%s\n",
+		info.EventCode, modeText, info.ConnHandle, info.StmtHandle,
+		info.StmtOrTrigger, expandedText,
+		runTimeText,
+		dbErrText)
+	return 0
+}
+
+func main() {
+	eventMask := sqlite3.TraceStmt | sqlite3.TraceProfile | sqlite3.TraceRow | sqlite3.TraceClose
+
+	sql.Register("sqlite3_tracing",
+		&sqlite3.SQLiteDriver{
+			ConnectHook: func(conn *sqlite3.SQLiteConn) error {
+				err := conn.SetTrace(&sqlite3.TraceConfig{
+					Callback:        traceCallback,
+					EventMask:       uint(eventMask),
+					WantExpandedSQL: true,
+				})
+				return err
+			},
+		})
+
+	os.Exit(dbMain())
+}
+
+// Harder to do DB work in main().
+// It's better with a separate function because
+// 'defer' and 'os.Exit' don't go well together.
+//
+// DO NOT use 'log.Fatal...' below: remember that it's equivalent to
+// Print() followed by a call to os.Exit(1) --- and
+// we want to avoid Exit() so 'defer' can do cleanup.
+// Use 'log.Panic...' instead.
+
+func dbMain() int {
+	db, err := sql.Open("sqlite3_tracing", ":memory:")
+	if err != nil {
+		fmt.Printf("Failed to open database: %#+v\n", err)
+		return 1
+	}
+	defer db.Close()
+
+	err = db.Ping()
+	if err != nil {
+		log.Panic(err)
+	}
+
+	dbSetup(db)
+
+	dbDoInsert(db)
+	dbDoInsertPrepared(db)
+	dbDoSelect(db)
+	dbDoSelectPrepared(db)
+
+	return 0
+}
+
+// 'DDL' stands for "Data Definition Language":
+
+// Note: "INTEGER PRIMARY KEY NOT NULL AUTOINCREMENT" causes the error
+// 'near "AUTOINCREMENT": syntax error'; without "NOT NULL" it works.
+const tableDDL = `CREATE TABLE t1 (
+ id INTEGER PRIMARY KEY AUTOINCREMENT,
+ note VARCHAR NOT NULL
+)`
+
+// 'DML' stands for "Data Manipulation Language":
+
+const insertDML = "INSERT INTO t1 (note) VALUES (?)"
+const selectDML = "SELECT id, note FROM t1 WHERE note LIKE ?"
+
+const textPrefix = "bla-1234567890-"
+const noteTextPattern = "%Prep%"
+
+const nGenRows = 4 // Number of Rows to Generate (for *each* approach tested)
+
+func dbSetup(db *sql.DB) {
+	var err error
+
+	_, err = db.Exec("DROP TABLE IF EXISTS t1")
+	if err != nil {
+		log.Panic(err)
+	}
+	_, err = db.Exec(tableDDL)
+	if err != nil {
+		log.Panic(err)
+	}
+}
+
+func dbDoInsert(db *sql.DB) {
+	const Descr = "DB-Exec"
+	for i := 0; i < nGenRows; i++ {
+		result, err := db.Exec(insertDML, textPrefix+Descr)
+		if err != nil {
+			log.Panic(err)
+		}
+
+		resultDoCheck(result, Descr, i)
+	}
+}
+
+func dbDoInsertPrepared(db *sql.DB) {
+	const Descr = "DB-Prepare"
+
+	stmt, err := db.Prepare(insertDML)
+	if err != nil {
+		log.Panic(err)
+	}
+	defer stmt.Close()
+
+	for i := 0; i < nGenRows; i++ {
+		result, err := stmt.Exec(textPrefix + Descr)
+		if err != nil {
+			log.Panic(err)
+		}
+
+		resultDoCheck(result, Descr, i)
+	}
+}
+
+func resultDoCheck(result sql.Result, callerDescr string, callIndex int) {
+	lastID, err := result.LastInsertId()
+	if err != nil {
+		log.Panic(err)
+	}
+	nAffected, err := result.RowsAffected()
+	if err != nil {
+		log.Panic(err)
+	}
+
+	log.Printf("Exec result for %s (%d): ID = %d, affected = %d\n", callerDescr, callIndex, lastID, nAffected)
+}
+
+func dbDoSelect(db *sql.DB) {
+	const Descr = "DB-Query"
+
+	rows, err := db.Query(selectDML, noteTextPattern)
+	if err != nil {
+		log.Panic(err)
+	}
+	defer rows.Close()
+
+	rowsDoFetch(rows, Descr)
+}
+
+func dbDoSelectPrepared(db *sql.DB) {
+	const Descr = "DB-Prepare"
+
+	stmt, err := db.Prepare(selectDML)
+	if err != nil {
+		log.Panic(err)
+	}
+	defer stmt.Close()
+
+	rows, err := stmt.Query(noteTextPattern)
+	if err != nil {
+		log.Panic(err)
+	}
+	defer rows.Close()
+
+	rowsDoFetch(rows, Descr)
+}
+
+func rowsDoFetch(rows *sql.Rows, callerDescr string) {
+	var nRows int
+	var id int64
+	var note string
+
+	for rows.Next() {
+		err := rows.Scan(&id, &note)
+		if err != nil {
+			log.Panic(err)
+		}
+		log.Printf("Row for %s (%d): id=%d, note=%q\n",
+			callerDescr, nRows, id, note)
+		nRows++
+	}
+	if err := rows.Err(); err != nil {
+		log.Panic(err)
+	}
+	log.Printf("Total %d rows for %s.\n", nRows, callerDescr)
+}

vendor/github.com/mattn/go-sqlite3/_example/vtable/main.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+
+	"github.com/mattn/go-sqlite3"
+)
+
+func main() {
+	sql.Register("sqlite3_with_extensions", &sqlite3.SQLiteDriver{
+		ConnectHook: func(conn *sqlite3.SQLiteConn) error {
+			return conn.CreateModule("github", &githubModule{})
+		},
+	})
+	db, err := sql.Open("sqlite3_with_extensions", ":memory:")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	_, err = db.Exec("create virtual table repo using github(id, full_name, description, html_url)")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	rows, err := db.Query("select id, full_name, description, html_url from repo")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var id, fullName, description, htmlURL string
+		rows.Scan(&id, &fullName, &description, &htmlURL)
+		fmt.Printf("%s: %s\n\t%s\n\t%s\n\n", id, fullName, description, htmlURL)
+	}
+}

vendor/github.com/mattn/go-sqlite3/_example/vtable/vtable.go

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+
+	"github.com/mattn/go-sqlite3"
+)
+
+type githubRepo struct {
+	ID          int    `json:"id"`
+	FullName    string `json:"full_name"`
+	Description string `json:"description"`
+	HTMLURL     string `json:"html_url"`
+}
+
+type githubModule struct {
+}
+
+func (m *githubModule) Create(c *sqlite3.SQLiteConn, args []string) (sqlite3.VTab, error) {
+	err := c.DeclareVTab(fmt.Sprintf(`
+		CREATE TABLE %s (
+			id INT,
+			full_name TEXT,
+			description TEXT,
+			html_url TEXT
+		)`, args[0]))
+	if err != nil {
+		return nil, err
+	}
+	return &ghRepoTable{}, nil
+}
+
+func (m *githubModule) Connect(c *sqlite3.SQLiteConn, args []string) (sqlite3.VTab, error) {
+	return m.Create(c, args)
+}
+
+func (m *githubModule) DestroyModule() {}
+
+type ghRepoTable struct {
+	repos []githubRepo
+}
+
+func (v *ghRepoTable) Open() (sqlite3.VTabCursor, error) {
+	resp, err := http.Get("https://api.github.com/repositories")
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	var repos []githubRepo
+	if err := json.Unmarshal(body, &repos); err != nil {
+		return nil, err
+	}
+	return &ghRepoCursor{0, repos}, nil
+}
+
+func (v *ghRepoTable) BestIndex(cst []sqlite3.InfoConstraint, ob []sqlite3.InfoOrderBy) (*sqlite3.IndexResult, error) {
+	return &sqlite3.IndexResult{}, nil
+}
+
+func (v *ghRepoTable) Disconnect() error { return nil }
+func (v *ghRepoTable) Destroy() error    { return nil }
+
+type ghRepoCursor struct {
+	index int
+	repos []githubRepo
+}
+
+func (vc *ghRepoCursor) Column(c *sqlite3.SQLiteContext, col int) error {
+	switch col {
+	case 0:
+		c.ResultInt(vc.repos[vc.index].ID)
+	case 1:
+		c.ResultText(vc.repos[vc.index].FullName)
+	case 2:
+		c.ResultText(vc.repos[vc.index].Description)
+	case 3:
+		c.ResultText(vc.repos[vc.index].HTMLURL)
+	}
+	return nil
+}
+
+func (vc *ghRepoCursor) Filter(idxNum int, idxStr string, vals []interface{}) error {
+	vc.index = 0
+	return nil
+}
+
+func (vc *ghRepoCursor) Next() error {
+	vc.index++
+	return nil
+}
+
+func (vc *ghRepoCursor) EOF() bool {
+	return vc.index >= len(vc.repos)
+}
+
+func (vc *ghRepoCursor) Rowid() (int64, error) {
+	return int64(vc.index), nil
+}
+
+func (vc *ghRepoCursor) Close() error {
+	return nil
+}

vendor/github.com/mattn/go-sqlite3/backup.go

@@ -19,10 +19,12 @@ import (
 	"unsafe"
 )
 
+// SQLiteBackup implement interface of Backup.
 type SQLiteBackup struct {
 	b *C.sqlite3_backup
 }
 
+// Backup make backup from src to dest.
 func (c *SQLiteConn) Backup(dest string, conn *SQLiteConn, src string) (*SQLiteBackup, error) {
 	destptr := C.CString(dest)
 	defer C.free(unsafe.Pointer(destptr))
@@ -37,10 +39,10 @@ func (c *SQLiteConn) Backup(dest string, conn *SQLiteConn, src string) (*SQLiteB
 	return nil, c.lastError()
 }
 
-// Backs up for one step. Calls the underlying `sqlite3_backup_step` function.
-// This function returns a boolean indicating if the backup is done and
-// an error signalling any other error. Done is returned if the underlying C
-// function returns SQLITE_DONE (Code 101)
+// Step to backs up for one step. Calls the underlying `sqlite3_backup_step`
+// function.  This function returns a boolean indicating if the backup is done
+// and an error signalling any other error. Done is returned if the underlying
+// C function returns SQLITE_DONE (Code 101)
 func (b *SQLiteBackup) Step(p int) (bool, error) {
 	ret := C.sqlite3_backup_step(b.b, C.int(p))
 	if ret == C.SQLITE_DONE {
@@ -51,24 +53,33 @@ func (b *SQLiteBackup) Step(p int) (bool, error) {
 	return false, nil
 }
 
+// Remaining return whether have the rest for backup.
 func (b *SQLiteBackup) Remaining() int {
 	return int(C.sqlite3_backup_remaining(b.b))
 }
 
+// PageCount return count of pages.
 func (b *SQLiteBackup) PageCount() int {
 	return int(C.sqlite3_backup_pagecount(b.b))
 }
 
+// Finish close backup.
 func (b *SQLiteBackup) Finish() error {
 	return b.Close()
 }
 
+// Close close backup.
 func (b *SQLiteBackup) Close() error {
 	ret := C.sqlite3_backup_finish(b.b)
+
+	// sqlite3_backup_finish() never fails, it just returns the
+	// error code from previous operations, so clean up before
+	// checking and returning an error
+	b.b = nil
+	runtime.SetFinalizer(b, nil)
+
 	if ret != 0 {
 		return Error{Code: ErrNo(ret)}
 	}
-	b.b = nil
-	runtime.SetFinalizer(b, nil)
 	return nil
 }

vendor/github.com/mattn/go-sqlite3/callback.go

@@ -11,7 +11,11 @@ package sqlite3
 // code for SQLite custom functions is in here.
 
 /*
+#ifndef USE_LIBSQLITE3
 #include <sqlite3-binding.h>
+#else
+#include <sqlite3.h>
+#endif
 #include <stdlib.h>
 
 void _sqlite3_result_text(sqlite3_context* ctx, const char* s);
@@ -36,8 +40,8 @@ func callbackTrampoline(ctx *C.sqlite3_context, argc int, argv **C.sqlite3_value
 }
 
 //export stepTrampoline
-func stepTrampoline(ctx *C.sqlite3_context, argc int, argv **C.sqlite3_value) {
-	args := (*[(math.MaxInt32 - 1) / unsafe.Sizeof((*C.sqlite3_value)(nil))]*C.sqlite3_value)(unsafe.Pointer(argv))[:argc:argc]
+func stepTrampoline(ctx *C.sqlite3_context, argc C.int, argv **C.sqlite3_value) {
+	args := (*[(math.MaxInt32 - 1) / unsafe.Sizeof((*C.sqlite3_value)(nil))]*C.sqlite3_value)(unsafe.Pointer(argv))[:int(argc):int(argc)]
 	ai := lookupHandle(uintptr(C.sqlite3_user_data(ctx))).(*aggInfo)
 	ai.Step(ctx, args)
 }
@@ -49,6 +53,30 @@ func doneTrampoline(ctx *C.sqlite3_context) {
 	ai.Done(ctx)
 }
 
+//export compareTrampoline
+func compareTrampoline(handlePtr uintptr, la C.int, a *C.char, lb C.int, b *C.char) C.int {
+	cmp := lookupHandle(handlePtr).(func(string, string) int)
+	return C.int(cmp(C.GoStringN(a, la), C.GoStringN(b, lb)))
+}
+
+//export commitHookTrampoline
+func commitHookTrampoline(handle uintptr) int {
+	callback := lookupHandle(handle).(func() int)
+	return callback()
+}
+
+//export rollbackHookTrampoline
+func rollbackHookTrampoline(handle uintptr) {
+	callback := lookupHandle(handle).(func())
+	callback()
+}
+
+//export updateHookTrampoline
+func updateHookTrampoline(handle uintptr, op int, db *C.char, table *C.char, rowid int64) {
+	callback := lookupHandle(handle).(func(int, string, string, int64))
+	callback(op, C.GoString(db), C.GoString(table), rowid)
+}
+
 // Use handles to avoid passing Go pointers to C.
 
 type handleVal struct {

vendor/github.com/mattn/go-sqlite3/error.go

@@ -7,12 +7,16 @@ package sqlite3
 
 import "C"
 
+// ErrNo inherit errno.
 type ErrNo int
 
+// ErrNoMask is mask code.
 const ErrNoMask C.int = 0xff
 
+// ErrNoExtended is extended errno.
 type ErrNoExtended int
 
+// Error implement sqlite error code.
 type Error struct {
 	Code         ErrNo         /* The error code returned by SQLite */
 	ExtendedCode ErrNoExtended /* The extended error code returned by SQLite */
@@ -52,14 +56,17 @@ var (
 	ErrWarning    = ErrNo(28) /* Warnings from sqlite3_log() */
 )
 
+// Error return error message from errno.
 func (err ErrNo) Error() string {
 	return Error{Code: err}.Error()
 }
 
+// Extend return extended errno.
 func (err ErrNo) Extend(by int) ErrNoExtended {
 	return ErrNoExtended(int(err) | (by << 8))
 }
 
+// Error return error message that is extended code.
 func (err ErrNoExtended) Error() string {
 	return Error{Code: ErrNo(C.int(err) & ErrNoMask), ExtendedCode: err}.Error()
 }
@@ -121,7 +128,7 @@ var (
 	ErrConstraintTrigger      = ErrConstraint.Extend(7)
 	ErrConstraintUnique       = ErrConstraint.Extend(8)
 	ErrConstraintVTab         = ErrConstraint.Extend(9)
-	ErrConstraintRowId        = ErrConstraint.Extend(10)
+	ErrConstraintRowID        = ErrConstraint.Extend(10)
 	ErrNoticeRecoverWAL       = ErrNotice.Extend(1)
 	ErrNoticeRecoverRollback  = ErrNotice.Extend(2)
 	ErrWarningAutoIndex       = ErrWarning.Extend(1)

vendor/github.com/mattn/go-sqlite3/sqlite3.go

@@ -7,8 +7,11 @@ package sqlite3
 
 /*
 #cgo CFLAGS: -std=gnu99
-#cgo CFLAGS: -DSQLITE_ENABLE_RTREE -DSQLITE_THREADSAFE
+#cgo CFLAGS: -DSQLITE_ENABLE_RTREE -DSQLITE_THREADSAFE=1
 #cgo CFLAGS: -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS4_UNICODE61
+#cgo CFLAGS: -DSQLITE_TRACE_SIZE_LIMIT=15
+#cgo CFLAGS: -DSQLITE_DISABLE_INTRINSIC
+#cgo CFLAGS: -Wno-deprecated-declarations
 #ifndef USE_LIBSQLITE3
 #include <sqlite3-binding.h>
 #else
@@ -99,9 +102,41 @@ int _sqlite3_create_function(
 void callbackTrampoline(sqlite3_context*, int, sqlite3_value**);
 void stepTrampoline(sqlite3_context*, int, sqlite3_value**);
 void doneTrampoline(sqlite3_context*);
+
+int compareTrampoline(void*, int, char*, int, char*);
+int commitHookTrampoline(void*);
+void rollbackHookTrampoline(void*);
+void updateHookTrampoline(void*, int, char*, char*, sqlite3_int64);
+
+#ifdef SQLITE_LIMIT_WORKER_THREADS
+# define _SQLITE_HAS_LIMIT
+# define SQLITE_LIMIT_LENGTH                    0
+# define SQLITE_LIMIT_SQL_LENGTH                1
+# define SQLITE_LIMIT_COLUMN                    2
+# define SQLITE_LIMIT_EXPR_DEPTH                3
+# define SQLITE_LIMIT_COMPOUND_SELECT           4
+# define SQLITE_LIMIT_VDBE_OP                   5
+# define SQLITE_LIMIT_FUNCTION_ARG              6
+# define SQLITE_LIMIT_ATTACHED                  7
+# define SQLITE_LIMIT_LIKE_PATTERN_LENGTH       8
+# define SQLITE_LIMIT_VARIABLE_NUMBER           9
+# define SQLITE_LIMIT_TRIGGER_DEPTH            10
+# define SQLITE_LIMIT_WORKER_THREADS           11
+# else
+# define SQLITE_LIMIT_WORKER_THREADS           11
+#endif
+
+static int _sqlite3_limit(sqlite3* db, int limitId, int newLimit) {
+#ifndef _SQLITE_HAS_LIMIT
+  return -1;
+#else
+  return sqlite3_limit(db, limitId, newLimit);
+#endif
+}
 */
 import "C"
 import (
+	"context"
 	"database/sql"
 	"database/sql/driver"
 	"errors"
@@ -112,14 +147,15 @@ import (
 	"runtime"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 	"unsafe"
 )
 
-// Timestamp formats understood by both this module and SQLite.
-// The first format in the slice will be used when saving time values
-// into the database. When parsing a string from a timestamp or
-// datetime column, the formats are tried in order.
+// SQLiteTimestampFormats is timestamp formats understood by both this module
+// and SQLite.  The first format in the slice will be used when saving time
+// values into the database. When parsing a string from a timestamp or datetime
+// column, the formats are tried in order.
 var SQLiteTimestampFormats = []string{
 	// By default, store timestamps with whatever timezone they come with.
 	// When parsed, they will be returned with the same timezone.
@@ -139,21 +175,28 @@ func init() {
 }
 
 // Version returns SQLite library version information.
-func Version() (libVersion string, libVersionNumber int, sourceId string) {
+func Version() (libVersion string, libVersionNumber int, sourceID string) {
 	libVersion = C.GoString(C.sqlite3_libversion())
 	libVersionNumber = int(C.sqlite3_libversion_number())
-	sourceId = C.GoString(C.sqlite3_sourceid())
-	return libVersion, libVersionNumber, sourceId
+	sourceID = C.GoString(C.sqlite3_sourceid())
+	return libVersion, libVersionNumber, sourceID
 }
 
-// Driver struct.
+const (
+	SQLITE_DELETE = C.SQLITE_DELETE
+	SQLITE_INSERT = C.SQLITE_INSERT
+	SQLITE_UPDATE = C.SQLITE_UPDATE
+)
+
+// SQLiteDriver implement sql.Driver.
 type SQLiteDriver struct {
 	Extensions  []string
 	ConnectHook func(*SQLiteConn) error
 }
 
-// Conn struct.
+// SQLiteConn implement sql.Conn.
 type SQLiteConn struct {
+	mu          sync.Mutex
 	db          *C.sqlite3
 	loc         *time.Location
 	txlock      string
@@ -161,35 +204,36 @@ type SQLiteConn struct {
 	aggregators []*aggInfo
 }
 
-// Tx struct.
+// SQLiteTx implemen sql.Tx.
 type SQLiteTx struct {
 	c *SQLiteConn
 }
 
-// Stmt struct.
+// SQLiteStmt implement sql.Stmt.
 type SQLiteStmt struct {
+	mu     sync.Mutex
 	c      *SQLiteConn
 	s      *C.sqlite3_stmt
-	nv     int
-	nn     []string
 	t      string
 	closed bool
 	cls    bool
 }
 
-// Result struct.
+// SQLiteResult implement sql.Result.
 type SQLiteResult struct {
 	id      int64
 	changes int64
 }
 
-// Rows struct.
+// SQLiteRows implement sql.Rows.
 type SQLiteRows struct {
 	s        *SQLiteStmt
 	nc       int
 	cols     []string
 	decltype []string
 	cls      bool
+	closed   bool
+	done     chan struct{}
 }
 
 type functionInfo struct {
@@ -295,16 +339,90 @@ func (ai *aggInfo) Done(ctx *C.sqlite3_context) {
 
 // Commit transaction.
 func (tx *SQLiteTx) Commit() error {
-	_, err := tx.c.exec("COMMIT")
+	_, err := tx.c.exec(context.Background(), "COMMIT", nil)
+	if err != nil && err.(Error).Code == C.SQLITE_BUSY {
+		// sqlite3 will leave the transaction open in this scenario.
+		// However, database/sql considers the transaction complete once we
+		// return from Commit() - we must clean up to honour its semantics.
+		tx.c.exec(context.Background(), "ROLLBACK", nil)
+	}
 	return err
 }
 
 // Rollback transaction.
 func (tx *SQLiteTx) Rollback() error {
-	_, err := tx.c.exec("ROLLBACK")
+	_, err := tx.c.exec(context.Background(), "ROLLBACK", nil)
 	return err
 }
 
+// RegisterCollation makes a Go function available as a collation.
+//
+// cmp receives two UTF-8 strings, a and b. The result should be 0 if
+// a==b, -1 if a < b, and +1 if a > b.
+//
+// cmp must always return the same result given the same
+// inputs. Additionally, it must have the following properties for all
+// strings A, B and C: if A==B then B==A; if A==B and B==C then A==C;
+// if A<B then B>A; if A<B and B<C then A<C.
+//
+// If cmp does not obey these constraints, sqlite3's behavior is
+// undefined when the collation is used.
+func (c *SQLiteConn) RegisterCollation(name string, cmp func(string, string) int) error {
+	handle := newHandle(c, cmp)
+	cname := C.CString(name)
+	defer C.free(unsafe.Pointer(cname))
+	rv := C.sqlite3_create_collation(c.db, cname, C.SQLITE_UTF8, unsafe.Pointer(handle), (*[0]byte)(unsafe.Pointer(C.compareTrampoline)))
+	if rv != C.SQLITE_OK {
+		return c.lastError()
+	}
+	return nil
+}
+
+// RegisterCommitHook sets the commit hook for a connection.
+//
+// If the callback returns non-zero the transaction will become a rollback.
+//
+// If there is an existing commit hook for this connection, it will be
+// removed. If callback is nil the existing hook (if any) will be removed
+// without creating a new one.
+func (c *SQLiteConn) RegisterCommitHook(callback func() int) {
+	if callback == nil {
+		C.sqlite3_commit_hook(c.db, nil, nil)
+	} else {
+		C.sqlite3_commit_hook(c.db, (*[0]byte)(unsafe.Pointer(C.commitHookTrampoline)), unsafe.Pointer(newHandle(c, callback)))
+	}
+}
+
+// RegisterRollbackHook sets the rollback hook for a connection.
+//
+// If there is an existing rollback hook for this connection, it will be
+// removed. If callback is nil the existing hook (if any) will be removed
+// without creating a new one.
+func (c *SQLiteConn) RegisterRollbackHook(callback func()) {
+	if callback == nil {
+		C.sqlite3_rollback_hook(c.db, nil, nil)
+	} else {
+		C.sqlite3_rollback_hook(c.db, (*[0]byte)(unsafe.Pointer(C.rollbackHookTrampoline)), unsafe.Pointer(newHandle(c, callback)))
+	}
+}
+
+// RegisterUpdateHook sets the update hook for a connection.
+//
+// The parameters to the callback are the operation (one of the constants
+// SQLITE_INSERT, SQLITE_DELETE, or SQLITE_UPDATE), the database name, the
+// table name, and the rowid.
+//
+// If there is an existing update hook for this connection, it will be
+// removed. If callback is nil the existing hook (if any) will be removed
+// without creating a new one.
+func (c *SQLiteConn) RegisterUpdateHook(callback func(int, string, string, int64)) {
+	if callback == nil {
+		C.sqlite3_update_hook(c.db, nil, nil)
+	} else {
+		C.sqlite3_update_hook(c.db, (*[0]byte)(unsafe.Pointer(C.updateHookTrampoline)), unsafe.Pointer(newHandle(c, callback)))
+	}
+}
+
 // RegisterFunc makes a Go function available as a SQLite function.
 //
 // The Go function can have arguments of the following types: any
@@ -375,13 +493,17 @@ func (c *SQLiteConn) RegisterFunc(name string, impl interface{}, pure bool) erro
 	if pure {
 		opts |= C.SQLITE_DETERMINISTIC
 	}
-	rv := C._sqlite3_create_function(c.db, cname, C.int(numArgs), C.int(opts), C.uintptr_t(newHandle(c, &fi)), (*[0]byte)(unsafe.Pointer(C.callbackTrampoline)), nil, nil)
+	rv := sqlite3CreateFunction(c.db, cname, C.int(numArgs), C.int(opts), newHandle(c, &fi), C.callbackTrampoline, nil, nil)
 	if rv != C.SQLITE_OK {
 		return c.lastError()
 	}
 	return nil
 }
 
+func sqlite3CreateFunction(db *C.sqlite3, zFunctionName *C.char, nArg C.int, eTextRep C.int, pApp uintptr, xFunc unsafe.Pointer, xStep unsafe.Pointer, xFinal unsafe.Pointer) C.int {
+	return C._sqlite3_create_function(db, zFunctionName, nArg, eTextRep, C.uintptr_t(pApp), (*[0]byte)(unsafe.Pointer(xFunc)), (*[0]byte)(unsafe.Pointer(xStep)), (*[0]byte)(unsafe.Pointer(xFinal)))
+}
+
 // RegisterAggregator makes a Go type available as a SQLite aggregation function.
 //
 // Because aggregation is incremental, it's implemented in Go with a
@@ -500,7 +622,7 @@ func (c *SQLiteConn) RegisterAggregator(name string, impl interface{}, pure bool
 	if pure {
 		opts |= C.SQLITE_DETERMINISTIC
 	}
-	rv := C._sqlite3_create_function(c.db, cname, C.int(stepNArgs), C.int(opts), C.uintptr_t(newHandle(c, &ai)), nil, (*[0]byte)(unsafe.Pointer(C.stepTrampoline)), (*[0]byte)(unsafe.Pointer(C.doneTrampoline)))
+	rv := sqlite3CreateFunction(c.db, cname, C.int(stepNArgs), C.int(opts), newHandle(c, &ai), nil, C.stepTrampoline, C.doneTrampoline)
 	if rv != C.SQLITE_OK {
 		return c.lastError()
 	}
@@ -512,22 +634,38 @@ func (c *SQLiteConn) AutoCommit() bool {
 	return int(C.sqlite3_get_autocommit(c.db)) != 0
 }
 
-func (c *SQLiteConn) lastError() Error {
+func (c *SQLiteConn) lastError() error {
+	return lastError(c.db)
+}
+
+func lastError(db *C.sqlite3) error {
+	rv := C.sqlite3_errcode(db)
+	if rv == C.SQLITE_OK {
+		return nil
+	}
 	return Error{
-		Code:         ErrNo(C.sqlite3_errcode(c.db)),
-		ExtendedCode: ErrNoExtended(C.sqlite3_extended_errcode(c.db)),
-		err:          C.GoString(C.sqlite3_errmsg(c.db)),
+		Code:         ErrNo(rv),
+		ExtendedCode: ErrNoExtended(C.sqlite3_extended_errcode(db)),
+		err:          C.GoString(C.sqlite3_errmsg(db)),
 	}
 }
 
-// Implements Execer
+// Exec implements Execer.
 func (c *SQLiteConn) Exec(query string, args []driver.Value) (driver.Result, error) {
-	if len(args) == 0 {
-		return c.exec(query)
+	list := make([]namedValue, len(args))
+	for i, v := range args {
+		list[i] = namedValue{
+			Ordinal: i + 1,
+			Value:   v,
+		}
 	}
+	return c.exec(context.Background(), query, list)
+}
 
+func (c *SQLiteConn) exec(ctx context.Context, query string, args []namedValue) (driver.Result, error) {
+	start := 0
 	for {
-		s, err := c.Prepare(query)
+		s, err := c.prepare(ctx, query)
 		if err != nil {
 			return nil, err
 		}
@@ -535,14 +673,19 @@ func (c *SQLiteConn) Exec(query string, args []driver.Value) (driver.Result, err
 		if s.(*SQLiteStmt).s != nil {
 			na := s.NumInput()
 			if len(args) < na {
-				return nil, fmt.Errorf("Not enough args to execute query. Expected %d, got %d.", na, len(args))
+				s.Close()
+				return nil, fmt.Errorf("not enough args to execute query: want %d got %d", na, len(args))
 			}
-			res, err = s.Exec(args[:na])
+			for i := 0; i < na; i++ {
+				args[i].Ordinal -= start
+			}
+			res, err = s.(*SQLiteStmt).exec(ctx, args[:na])
 			if err != nil && err != driver.ErrSkip {
 				s.Close()
 				return nil, err
 			}
 			args = args[na:]
+			start += na
 		}
 		tail := s.(*SQLiteStmt).t
 		s.Close()
@@ -553,24 +696,46 @@ func (c *SQLiteConn) Exec(query string, args []driver.Value) (driver.Result, err
 	}
 }
 
-// Implements Queryer
+type namedValue struct {
+	Name    string
+	Ordinal int
+	Value   driver.Value
+}
+
+// Query implements Queryer.
 func (c *SQLiteConn) Query(query string, args []driver.Value) (driver.Rows, error) {
+	list := make([]namedValue, len(args))
+	for i, v := range args {
+		list[i] = namedValue{
+			Ordinal: i + 1,
+			Value:   v,
+		}
+	}
+	return c.query(context.Background(), query, list)
+}
+
+func (c *SQLiteConn) query(ctx context.Context, query string, args []namedValue) (driver.Rows, error) {
+	start := 0
 	for {
-		s, err := c.Prepare(query)
+		s, err := c.prepare(ctx, query)
 		if err != nil {
 			return nil, err
 		}
 		s.(*SQLiteStmt).cls = true
 		na := s.NumInput()
 		if len(args) < na {
-			return nil, fmt.Errorf("Not enough args to execute query. Expected %d, got %d.", na, len(args))
+			return nil, fmt.Errorf("not enough args to execute query: want %d got %d", na, len(args))
 		}
-		rows, err := s.Query(args[:na])
+		for i := 0; i < na; i++ {
+			args[i].Ordinal -= start
+		}
+		rows, err := s.(*SQLiteStmt).query(ctx, args[:na])
 		if err != nil && err != driver.ErrSkip {
 			s.Close()
-			return nil, err
+			return rows, err
 		}
 		args = args[na:]
+		start += na
 		tail := s.(*SQLiteStmt).t
 		if tail == "" {
 			return rows, nil
@@ -581,21 +746,13 @@ func (c *SQLiteConn) Query(query string, args []driver.Value) (driver.Rows, erro
 	}
 }
 
-func (c *SQLiteConn) exec(cmd string) (driver.Result, error) {
-	pcmd := C.CString(cmd)
-	defer C.free(unsafe.Pointer(pcmd))
-
-	var rowid, changes C.longlong
-	rv := C._sqlite3_exec(c.db, pcmd, &rowid, &changes)
-	if rv != C.SQLITE_OK {
-		return nil, c.lastError()
-	}
-	return &SQLiteResult{int64(rowid), int64(changes)}, nil
-}
-
 // Begin transaction.
 func (c *SQLiteConn) Begin() (driver.Tx, error) {
-	if _, err := c.exec(c.txlock); err != nil {
+	return c.begin(context.Background())
+}
+
+func (c *SQLiteConn) begin(ctx context.Context) (driver.Tx, error) {
+	if _, err := c.exec(ctx, c.txlock, nil); err != nil {
 		return nil, err
 	}
 	return &SQLiteTx{c}, nil
@@ -619,6 +776,10 @@ func errorString(err Error) string {
 //   _txlock=XXX
 //     Specify locking behavior for transactions.  XXX can be "immediate",
 //     "deferred", "exclusive".
+//   _foreign_keys=X
+//     Enable or disable enforcement of foreign keys.  X can be 1 or 0.
+//   _recursive_triggers=X
+//     Enable or disable recursive triggers.  X can be 1 or 0.
 func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
 	if C.sqlite3_threadsafe() == 0 {
 		return nil, errors.New("sqlite library was not compiled for thread-safe operation")
@@ -626,7 +787,9 @@ func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
 
 	var loc *time.Location
 	txlock := "BEGIN"
-	busy_timeout := 5000
+	busyTimeout := 5000
+	foreignKeys := -1
+	recursiveTriggers := -1
 	pos := strings.IndexRune(dsn, '?')
 	if pos >= 1 {
 		params, err := url.ParseQuery(dsn[pos+1:])
@@ -652,7 +815,7 @@ func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
 			if err != nil {
 				return nil, fmt.Errorf("Invalid _busy_timeout: %v: %v", val, err)
 			}
-			busy_timeout = int(iv)
+			busyTimeout = int(iv)
 		}
 
 		// _txlock
@@ -669,6 +832,30 @@ func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
 			}
 		}
 
+		// _foreign_keys
+		if val := params.Get("_foreign_keys"); val != "" {
+			switch val {
+			case "1":
+				foreignKeys = 1
+			case "0":
+				foreignKeys = 0
+			default:
+				return nil, fmt.Errorf("Invalid _foreign_keys: %v", val)
+			}
+		}
+
+		// _recursive_triggers
+		if val := params.Get("_recursive_triggers"); val != "" {
+			switch val {
+			case "1":
+				recursiveTriggers = 1
+			case "0":
+				recursiveTriggers = 0
+			default:
+				return nil, fmt.Errorf("Invalid _recursive_triggers: %v", val)
+			}
+		}
+
 		if !strings.HasPrefix(dsn, "file:") {
 			dsn = dsn[:pos]
 		}
@@ -689,21 +876,56 @@ func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
 		return nil, errors.New("sqlite succeeded without returning a database")
 	}
 
-	rv = C.sqlite3_busy_timeout(db, C.int(busy_timeout))
+	rv = C.sqlite3_busy_timeout(db, C.int(busyTimeout))
 	if rv != C.SQLITE_OK {
+		C.sqlite3_close_v2(db)
 		return nil, Error{Code: ErrNo(rv)}
 	}
 
+	exec := func(s string) error {
+		cs := C.CString(s)
+		rv := C.sqlite3_exec(db, cs, nil, nil, nil)
+		C.free(unsafe.Pointer(cs))
+		if rv != C.SQLITE_OK {
+			return lastError(db)
+		}
+		return nil
+	}
+	if foreignKeys == 0 {
+		if err := exec("PRAGMA foreign_keys = OFF;"); err != nil {
+			C.sqlite3_close_v2(db)
+			return nil, err
+		}
+	} else if foreignKeys == 1 {
+		if err := exec("PRAGMA foreign_keys = ON;"); err != nil {
+			C.sqlite3_close_v2(db)
+			return nil, err
+		}
+	}
+	if recursiveTriggers == 0 {
+		if err := exec("PRAGMA recursive_triggers = OFF;"); err != nil {
+			C.sqlite3_close_v2(db)
+			return nil, err
+		}
+	} else if recursiveTriggers == 1 {
+		if err := exec("PRAGMA recursive_triggers = ON;"); err != nil {
+			C.sqlite3_close_v2(db)
+			return nil, err
+		}
+	}
+
 	conn := &SQLiteConn{db: db, loc: loc, txlock: txlock}
 
 	if len(d.Extensions) > 0 {
 		if err := conn.loadExtensions(d.Extensions); err != nil {
+			conn.Close()
 			return nil, err
 		}
 	}
 
 	if d.ConnectHook != nil {
 		if err := d.ConnectHook(conn); err != nil {
+			conn.Close()
 			return nil, err
 		}
 	}
@@ -713,18 +935,33 @@ func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
 
 // Close the connection.
 func (c *SQLiteConn) Close() error {
-	deleteHandles(c)
 	rv := C.sqlite3_close_v2(c.db)
 	if rv != C.SQLITE_OK {
 		return c.lastError()
 	}
+	deleteHandles(c)
+	c.mu.Lock()
 	c.db = nil
+	c.mu.Unlock()
 	runtime.SetFinalizer(c, nil)
 	return nil
 }
 
+func (c *SQLiteConn) dbConnOpen() bool {
+	if c == nil {
+		return false
+	}
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	return c.db != nil
+}
+
 // Prepare the query string. Return a new statement.
 func (c *SQLiteConn) Prepare(query string) (driver.Stmt, error) {
+	return c.prepare(context.Background(), query)
+}
+
+func (c *SQLiteConn) prepare(ctx context.Context, query string) (driver.Stmt, error) {
 	pquery := C.CString(query)
 	defer C.free(unsafe.Pointer(pquery))
 	var s *C.sqlite3_stmt
@@ -737,29 +974,54 @@ func (c *SQLiteConn) Prepare(query string) (driver.Stmt, error) {
 	if tail != nil && *tail != '\000' {
 		t = strings.TrimSpace(C.GoString(tail))
 	}
-	nv := int(C.sqlite3_bind_parameter_count(s))
-	var nn []string
-	for i := 0; i < nv; i++ {
-		pn := C.GoString(C.sqlite3_bind_parameter_name(s, C.int(i+1)))
-		if len(pn) > 1 && pn[0] == '$' && 48 <= pn[1] && pn[1] <= 57 {
-			nn = append(nn, C.GoString(C.sqlite3_bind_parameter_name(s, C.int(i+1))))
-		}
-	}
-	ss := &SQLiteStmt{c: c, s: s, nv: nv, nn: nn, t: t}
+	ss := &SQLiteStmt{c: c, s: s, t: t}
 	runtime.SetFinalizer(ss, (*SQLiteStmt).Close)
 	return ss, nil
 }
 
+// Run-Time Limit Categories.
+// See: http://www.sqlite.org/c3ref/c_limit_attached.html
+const (
+	SQLITE_LIMIT_LENGTH              = C.SQLITE_LIMIT_LENGTH
+	SQLITE_LIMIT_SQL_LENGTH          = C.SQLITE_LIMIT_SQL_LENGTH
+	SQLITE_LIMIT_COLUMN              = C.SQLITE_LIMIT_COLUMN
+	SQLITE_LIMIT_EXPR_DEPTH          = C.SQLITE_LIMIT_EXPR_DEPTH
+	SQLITE_LIMIT_COMPOUND_SELECT     = C.SQLITE_LIMIT_COMPOUND_SELECT
+	SQLITE_LIMIT_VDBE_OP             = C.SQLITE_LIMIT_VDBE_OP
+	SQLITE_LIMIT_FUNCTION_ARG        = C.SQLITE_LIMIT_FUNCTION_ARG
+	SQLITE_LIMIT_ATTACHED            = C.SQLITE_LIMIT_ATTACHED
+	SQLITE_LIMIT_LIKE_PATTERN_LENGTH = C.SQLITE_LIMIT_LIKE_PATTERN_LENGTH
+	SQLITE_LIMIT_VARIABLE_NUMBER     = C.SQLITE_LIMIT_VARIABLE_NUMBER
+	SQLITE_LIMIT_TRIGGER_DEPTH       = C.SQLITE_LIMIT_TRIGGER_DEPTH
+	SQLITE_LIMIT_WORKER_THREADS      = C.SQLITE_LIMIT_WORKER_THREADS
+)
+
+// GetLimit returns the current value of a run-time limit.
+// See: sqlite3_limit, http://www.sqlite.org/c3ref/limit.html
+func (c *SQLiteConn) GetLimit(id int) int {
+	return int(C._sqlite3_limit(c.db, C.int(id), -1))
+}
+
+// SetLimit changes the value of a run-time limits.
+// Then this method returns the prior value of the limit.
+// See: sqlite3_limit, http://www.sqlite.org/c3ref/limit.html
+func (c *SQLiteConn) SetLimit(id int, newVal int) int {
+	return int(C._sqlite3_limit(c.db, C.int(id), C.int(newVal)))
+}
+
 // Close the statement.
 func (s *SQLiteStmt) Close() error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
 	if s.closed {
 		return nil
 	}
 	s.closed = true
-	if s.c == nil || s.c.db == nil {
+	if !s.c.dbConnOpen() {
 		return errors.New("sqlite statement with already closed database connection")
 	}
 	rv := C.sqlite3_finalize(s.s)
+	s.s = nil
 	if rv != C.SQLITE_OK {
 		return s.c.lastError()
 	}
@@ -767,9 +1029,9 @@ func (s *SQLiteStmt) Close() error {
 	return nil
 }
 
-// Return a number of parameters.
+// NumInput return a number of parameters.
 func (s *SQLiteStmt) NumInput() int {
-	return s.nv
+	return int(C.sqlite3_bind_parameter_count(s.s))
 }
 
 type bindArg struct {
@@ -777,37 +1039,30 @@ type bindArg struct {
 	v driver.Value
 }
 
-func (s *SQLiteStmt) bind(args []driver.Value) error {
+var placeHolder = []byte{0}
+
+func (s *SQLiteStmt) bind(args []namedValue) error {
 	rv := C.sqlite3_reset(s.s)
 	if rv != C.SQLITE_ROW && rv != C.SQLITE_OK && rv != C.SQLITE_DONE {
 		return s.c.lastError()
 	}
 
-	var vargs []bindArg
-	narg := len(args)
-	vargs = make([]bindArg, narg)
-	if len(s.nn) > 0 {
-		for i, v := range s.nn {
-			if pi, err := strconv.Atoi(v[1:]); err == nil {
-				vargs[i] = bindArg{pi, args[i]}
-			}
-		}
-	} else {
-		for i, v := range args {
-			vargs[i] = bindArg{i + 1, v}
+	for i, v := range args {
+		if v.Name != "" {
+			cname := C.CString(":" + v.Name)
+			args[i].Ordinal = int(C.sqlite3_bind_parameter_index(s.s, cname))
+			C.free(unsafe.Pointer(cname))
 		}
 	}
 
-	for _, varg := range vargs {
-		n := C.int(varg.n)
-		v := varg.v
-		switch v := v.(type) {
+	for _, arg := range args {
+		n := C.int(arg.Ordinal)
+		switch v := arg.Value.(type) {
 		case nil:
 			rv = C.sqlite3_bind_null(s.s, n)
 		case string:
 			if len(v) == 0 {
-				b := []byte{0}
-				rv = C._sqlite3_bind_text(s.s, n, (*C.char)(unsafe.Pointer(&b[0])), C.int(0))
+				rv = C._sqlite3_bind_text(s.s, n, (*C.char)(unsafe.Pointer(&placeHolder[0])), C.int(0))
 			} else {
 				b := []byte(v)
 				rv = C._sqlite3_bind_text(s.s, n, (*C.char)(unsafe.Pointer(&b[0])), C.int(len(b)))
@@ -823,11 +1078,11 @@ func (s *SQLiteStmt) bind(args []driver.Value) error {
 		case float64:
 			rv = C.sqlite3_bind_double(s.s, n, C.double(v))
 		case []byte:
-			if len(v) == 0 {
-				rv = C._sqlite3_bind_blob(s.s, n, nil, 0)
-			} else {
-				rv = C._sqlite3_bind_blob(s.s, n, unsafe.Pointer(&v[0]), C.int(len(v)))
+			ln := len(v)
+			if ln == 0 {
+				v = placeHolder
 			}
+			rv = C._sqlite3_bind_blob(s.s, n, unsafe.Pointer(&v[0]), C.int(ln))
 		case time.Time:
 			b := []byte(v.Format(SQLiteTimestampFormats[0]))
 			rv = C._sqlite3_bind_text(s.s, n, (*C.char)(unsafe.Pointer(&b[0])), C.int(len(b)))
@@ -841,29 +1096,90 @@ func (s *SQLiteStmt) bind(args []driver.Value) error {
 
 // Query the statement with arguments. Return records.
 func (s *SQLiteStmt) Query(args []driver.Value) (driver.Rows, error) {
+	list := make([]namedValue, len(args))
+	for i, v := range args {
+		list[i] = namedValue{
+			Ordinal: i + 1,
+			Value:   v,
+		}
+	}
+	return s.query(context.Background(), list)
+}
+
+func (s *SQLiteStmt) query(ctx context.Context, args []namedValue) (driver.Rows, error) {
 	if err := s.bind(args); err != nil {
 		return nil, err
 	}
-	return &SQLiteRows{s, int(C.sqlite3_column_count(s.s)), nil, nil, s.cls}, nil
+
+	rows := &SQLiteRows{
+		s:        s,
+		nc:       int(C.sqlite3_column_count(s.s)),
+		cols:     nil,
+		decltype: nil,
+		cls:      s.cls,
+		closed:   false,
+		done:     make(chan struct{}),
+	}
+
+	go func(db *C.sqlite3) {
+		select {
+		case <-ctx.Done():
+			select {
+			case <-rows.done:
+			default:
+				C.sqlite3_interrupt(db)
+				rows.Close()
+			}
+		case <-rows.done:
+		}
+	}(s.c.db)
+
+	return rows, nil
 }
 
-// Return last inserted ID.
+// LastInsertId teturn last inserted ID.
 func (r *SQLiteResult) LastInsertId() (int64, error) {
 	return r.id, nil
 }
 
-// Return how many rows affected.
+// RowsAffected return how many rows affected.
 func (r *SQLiteResult) RowsAffected() (int64, error) {
 	return r.changes, nil
 }
 
-// Execute the statement with arguments. Return result object.
+// Exec execute the statement with arguments. Return result object.
 func (s *SQLiteStmt) Exec(args []driver.Value) (driver.Result, error) {
+	list := make([]namedValue, len(args))
+	for i, v := range args {
+		list[i] = namedValue{
+			Ordinal: i + 1,
+			Value:   v,
+		}
+	}
+	return s.exec(context.Background(), list)
+}
+
+func (s *SQLiteStmt) exec(ctx context.Context, args []namedValue) (driver.Result, error) {
 	if err := s.bind(args); err != nil {
 		C.sqlite3_reset(s.s)
 		C.sqlite3_clear_bindings(s.s)
 		return nil, err
 	}
+
+	done := make(chan struct{})
+	defer close(done)
+	go func(db *C.sqlite3) {
+		select {
+		case <-done:
+		case <-ctx.Done():
+			select {
+			case <-done:
+			default:
+				C.sqlite3_interrupt(db)
+			}
+		}
+	}(s.c.db)
+
 	var rowid, changes C.longlong
 	rv := C._sqlite3_step(s.s, &rowid, &changes)
 	if rv != C.SQLITE_ROW && rv != C.SQLITE_OK && rv != C.SQLITE_DONE {
@@ -872,27 +1188,39 @@ func (s *SQLiteStmt) Exec(args []driver.Value) (driver.Result, error) {
 		C.sqlite3_clear_bindings(s.s)
 		return nil, err
 	}
-	return &SQLiteResult{int64(rowid), int64(changes)}, nil
+
+	return &SQLiteResult{id: int64(rowid), changes: int64(changes)}, nil
 }
 
 // Close the rows.
 func (rc *SQLiteRows) Close() error {
-	if rc.s.closed {
+	rc.s.mu.Lock()
+	if rc.s.closed || rc.closed {
+		rc.s.mu.Unlock()
 		return nil
 	}
+	rc.closed = true
+	if rc.done != nil {
+		close(rc.done)
+	}
 	if rc.cls {
+		rc.s.mu.Unlock()
 		return rc.s.Close()
 	}
 	rv := C.sqlite3_reset(rc.s.s)
 	if rv != C.SQLITE_OK {
+		rc.s.mu.Unlock()
 		return rc.s.c.lastError()
 	}
+	rc.s.mu.Unlock()
 	return nil
 }
 
-// Return column names.
+// Columns return column names.
 func (rc *SQLiteRows) Columns() []string {
-	if rc.nc != len(rc.cols) {
+	rc.s.mu.Lock()
+	defer rc.s.mu.Unlock()
+	if rc.s.s != nil && rc.nc != len(rc.cols) {
 		rc.cols = make([]string, rc.nc)
 		for i := 0; i < rc.nc; i++ {
 			rc.cols[i] = C.GoString(C.sqlite3_column_name(rc.s.s, C.int(i)))
@@ -901,9 +1229,8 @@ func (rc *SQLiteRows) Columns() []string {
 	return rc.cols
 }
 
-// Return column types.
-func (rc *SQLiteRows) DeclTypes() []string {
-	if rc.decltype == nil {
+func (rc *SQLiteRows) declTypes() []string {
+	if rc.s.s != nil && rc.decltype == nil {
 		rc.decltype = make([]string, rc.nc)
 		for i := 0; i < rc.nc; i++ {
 			rc.decltype[i] = strings.ToLower(C.GoString(C.sqlite3_column_decltype(rc.s.s, C.int(i))))
@@ -912,8 +1239,20 @@ func (rc *SQLiteRows) DeclTypes() []string {
 	return rc.decltype
 }
 
-// Move cursor to next.
+// DeclTypes return column types.
+func (rc *SQLiteRows) DeclTypes() []string {
+	rc.s.mu.Lock()
+	defer rc.s.mu.Unlock()
+	return rc.declTypes()
+}
+
+// Next move cursor to next.
 func (rc *SQLiteRows) Next(dest []driver.Value) error {
+	if rc.s.closed {
+		return io.EOF
+	}
+	rc.s.mu.Lock()
+	defer rc.s.mu.Unlock()
 	rv := C.sqlite3_step(rc.s.s)
 	if rv == C.SQLITE_DONE {
 		return io.EOF
@@ -926,7 +1265,7 @@ func (rc *SQLiteRows) Next(dest []driver.Value) error {
 		return nil
 	}
 
-	rc.DeclTypes()
+	rc.declTypes()
 
 	for i := range dest {
 		switch C.sqlite3_column_type(rc.s.s, C.int(i)) {
@@ -939,10 +1278,11 @@ func (rc *SQLiteRows) Next(dest []driver.Value) error {
 				// large to be a reasonable timestamp in seconds.
 				if val > 1e12 || val < -1e12 {
 					val *= int64(time.Millisecond) // convert ms to nsec
+					t = time.Unix(0, val)
 				} else {
-					val *= int64(time.Second) // convert sec to nsec
+					t = time.Unix(val, 0)
 				}
-				t = time.Unix(0, val).UTC()
+				t = t.UTC()
 				if rc.s.c.loc != nil {
 					t = t.In(rc.s.c.loc)
 				}

vendor/github.com/mattn/go-sqlite3/sqlite3_context.go

@@ -0,0 +1,103 @@
+// Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package sqlite3
+
+/*
+
+#ifndef USE_LIBSQLITE3
+#include <sqlite3-binding.h>
+#else
+#include <sqlite3.h>
+#endif
+#include <stdlib.h>
+// These wrappers are necessary because SQLITE_TRANSIENT
+// is a pointer constant, and cgo doesn't translate them correctly.
+
+static inline void my_result_text(sqlite3_context *ctx, char *p, int np) {
+	sqlite3_result_text(ctx, p, np, SQLITE_TRANSIENT);
+}
+
+static inline void my_result_blob(sqlite3_context *ctx, void *p, int np) {
+	sqlite3_result_blob(ctx, p, np, SQLITE_TRANSIENT);
+}
+*/
+import "C"
+
+import (
+	"math"
+	"reflect"
+	"unsafe"
+)
+
+const i64 = unsafe.Sizeof(int(0)) > 4
+
+// SQLiteContext behave sqlite3_context
+type SQLiteContext C.sqlite3_context
+
+// ResultBool sets the result of an SQL function.
+func (c *SQLiteContext) ResultBool(b bool) {
+	if b {
+		c.ResultInt(1)
+	} else {
+		c.ResultInt(0)
+	}
+}
+
+// ResultBlob sets the result of an SQL function.
+// See: sqlite3_result_blob, http://sqlite.org/c3ref/result_blob.html
+func (c *SQLiteContext) ResultBlob(b []byte) {
+	if i64 && len(b) > math.MaxInt32 {
+		C.sqlite3_result_error_toobig((*C.sqlite3_context)(c))
+		return
+	}
+	var p *byte
+	if len(b) > 0 {
+		p = &b[0]
+	}
+	C.my_result_blob((*C.sqlite3_context)(c), unsafe.Pointer(p), C.int(len(b)))
+}
+
+// ResultDouble sets the result of an SQL function.
+// See: sqlite3_result_double, http://sqlite.org/c3ref/result_blob.html
+func (c *SQLiteContext) ResultDouble(d float64) {
+	C.sqlite3_result_double((*C.sqlite3_context)(c), C.double(d))
+}
+
+// ResultInt sets the result of an SQL function.
+// See: sqlite3_result_int, http://sqlite.org/c3ref/result_blob.html
+func (c *SQLiteContext) ResultInt(i int) {
+	if i64 && (i > math.MaxInt32 || i < math.MinInt32) {
+		C.sqlite3_result_int64((*C.sqlite3_context)(c), C.sqlite3_int64(i))
+	} else {
+		C.sqlite3_result_int((*C.sqlite3_context)(c), C.int(i))
+	}
+}
+
+// ResultInt64 sets the result of an SQL function.
+// See: sqlite3_result_int64, http://sqlite.org/c3ref/result_blob.html
+func (c *SQLiteContext) ResultInt64(i int64) {
+	C.sqlite3_result_int64((*C.sqlite3_context)(c), C.sqlite3_int64(i))
+}
+
+// ResultNull sets the result of an SQL function.
+// See: sqlite3_result_null, http://sqlite.org/c3ref/result_blob.html
+func (c *SQLiteContext) ResultNull() {
+	C.sqlite3_result_null((*C.sqlite3_context)(c))
+}
+
+// ResultText sets the result of an SQL function.
+// See: sqlite3_result_text, http://sqlite.org/c3ref/result_blob.html
+func (c *SQLiteContext) ResultText(s string) {
+	h := (*reflect.StringHeader)(unsafe.Pointer(&s))
+	cs, l := (*C.char)(unsafe.Pointer(h.Data)), C.int(h.Len)
+	C.my_result_text((*C.sqlite3_context)(c), cs, l)
+}
+
+// ResultZeroblob sets the result of an SQL function.
+// See: sqlite3_result_zeroblob, http://sqlite.org/c3ref/result_blob.html
+func (c *SQLiteContext) ResultZeroblob(n int) {
+	C.sqlite3_result_zeroblob((*C.sqlite3_context)(c), C.int(n))
+}

vendor/github.com/mattn/go-sqlite3/sqlite3_go18.go

@@ -0,0 +1,69 @@
+// Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+// +build go1.8
+
+package sqlite3
+
+import (
+	"database/sql/driver"
+	"errors"
+
+	"context"
+)
+
+// Ping implement Pinger.
+func (c *SQLiteConn) Ping(ctx context.Context) error {
+	if c.db == nil {
+		return errors.New("Connection was closed")
+	}
+	return nil
+}
+
+// QueryContext implement QueryerContext.
+func (c *SQLiteConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
+	list := make([]namedValue, len(args))
+	for i, nv := range args {
+		list[i] = namedValue(nv)
+	}
+	return c.query(ctx, query, list)
+}
+
+// ExecContext implement ExecerContext.
+func (c *SQLiteConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
+	list := make([]namedValue, len(args))
+	for i, nv := range args {
+		list[i] = namedValue(nv)
+	}
+	return c.exec(ctx, query, list)
+}
+
+// PrepareContext implement ConnPrepareContext.
+func (c *SQLiteConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
+	return c.prepare(ctx, query)
+}
+
+// BeginTx implement ConnBeginTx.
+func (c *SQLiteConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
+	return c.begin(ctx)
+}
+
+// QueryContext implement QueryerContext.
+func (s *SQLiteStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
+	list := make([]namedValue, len(args))
+	for i, nv := range args {
+		list[i] = namedValue(nv)
+	}
+	return s.query(ctx, list)
+}
+
+// ExecContext implement ExecerContext.
+func (s *SQLiteStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
+	list := make([]namedValue, len(args))
+	for i, nv := range args {
+		list[i] = namedValue(nv)
+	}
+	return s.exec(ctx, list)
+}

vendor/github.com/mattn/go-sqlite3/sqlite3_icu.go

@@ -2,7 +2,7 @@
 //
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file.
-// +build icu 
+// +build icu
 
 package sqlite3
 

vendor/github.com/mattn/go-sqlite3/sqlite3_libsqlite3.go

@@ -10,5 +10,6 @@ package sqlite3
 #cgo CFLAGS: -DUSE_LIBSQLITE3
 #cgo linux LDFLAGS: -lsqlite3
 #cgo darwin LDFLAGS: -L/usr/local/opt/sqlite/lib -lsqlite3
+#cgo solaris LDFLAGS: -lsqlite3
 */
 import "C"

vendor/github.com/mattn/go-sqlite3/sqlite3_load_extension.go

@@ -7,7 +7,11 @@
 package sqlite3
 
 /*
+#ifndef USE_LIBSQLITE3
 #include <sqlite3-binding.h>
+#else
+#include <sqlite3.h>
+#endif
 #include <stdlib.h>
 */
 import "C"
@@ -27,6 +31,7 @@ func (c *SQLiteConn) loadExtensions(extensions []string) error {
 		defer C.free(unsafe.Pointer(cext))
 		rv = C.sqlite3_load_extension(c.db, cext, nil, nil)
 		if rv != C.SQLITE_OK {
+			C.sqlite3_enable_load_extension(c.db, 0)
 			return errors.New(C.GoString(C.sqlite3_errmsg(c.db)))
 		}
 	}
@@ -38,6 +43,7 @@ func (c *SQLiteConn) loadExtensions(extensions []string) error {
 	return nil
 }
 
+// LoadExtension load the sqlite3 extension.
 func (c *SQLiteConn) LoadExtension(lib string, entry string) error {
 	rv := C.sqlite3_enable_load_extension(c.db, 1)
 	if rv != C.SQLITE_OK {

vendor/github.com/mattn/go-sqlite3/sqlite3_other.go

@@ -9,5 +9,6 @@ package sqlite3
 /*
 #cgo CFLAGS: -I.
 #cgo linux LDFLAGS: -ldl
+#cgo solaris LDFLAGS: -lc
 */
 import "C"

vendor/github.com/mattn/go-sqlite3/sqlite3_test/sqltest.go

@@ -1,409 +0,0 @@
-package sqlite3_test
-
-import (
-	"database/sql"
-	"fmt"
-	"math/rand"
-	"regexp"
-	"strconv"
-	"sync"
-	"testing"
-	"time"
-)
-
-type Dialect int
-
-const (
-	SQLITE Dialect = iota
-	POSTGRESQL
-	MYSQL
-)
-
-type DB struct {
-	*testing.T
-	*sql.DB
-	dialect Dialect
-	once    sync.Once
-}
-
-var db *DB
-
-// the following tables will be created and dropped during the test
-var testTables = []string{"foo", "bar", "t", "bench"}
-
-var tests = []testing.InternalTest{
-	{"TestBlobs", TestBlobs},
-	{"TestManyQueryRow", TestManyQueryRow},
-	{"TestTxQuery", TestTxQuery},
-	{"TestPreparedStmt", TestPreparedStmt},
-}
-
-var benchmarks = []testing.InternalBenchmark{
-	{"BenchmarkExec", BenchmarkExec},
-	{"BenchmarkQuery", BenchmarkQuery},
-	{"BenchmarkParams", BenchmarkParams},
-	{"BenchmarkStmt", BenchmarkStmt},
-	{"BenchmarkRows", BenchmarkRows},
-	{"BenchmarkStmtRows", BenchmarkStmtRows},
-}
-
-// RunTests runs the SQL test suite
-func RunTests(t *testing.T, d *sql.DB, dialect Dialect) {
-	db = &DB{t, d, dialect, sync.Once{}}
-	testing.RunTests(func(string, string) (bool, error) { return true, nil }, tests)
-
-	if !testing.Short() {
-		for _, b := range benchmarks {
-			fmt.Printf("%-20s", b.Name)
-			r := testing.Benchmark(b.F)
-			fmt.Printf("%10d %10.0f req/s\n", r.N, float64(r.N)/r.T.Seconds())
-		}
-	}
-	db.tearDown()
-}
-
-func (db *DB) mustExec(sql string, args ...interface{}) sql.Result {
-	res, err := db.Exec(sql, args...)
-	if err != nil {
-		db.Fatalf("Error running %q: %v", sql, err)
-	}
-	return res
-}
-
-func (db *DB) tearDown() {
-	for _, tbl := range testTables {
-		switch db.dialect {
-		case SQLITE:
-			db.mustExec("drop table if exists " + tbl)
-		case MYSQL, POSTGRESQL:
-			db.mustExec("drop table if exists " + tbl)
-		default:
-			db.Fatal("unkown dialect")
-		}
-	}
-}
-
-// q replaces ? parameters if needed
-func (db *DB) q(sql string) string {
-	switch db.dialect {
-	case POSTGRESQL: // repace with $1, $2, ..
-		qrx := regexp.MustCompile(`\?`)
-		n := 0
-		return qrx.ReplaceAllStringFunc(sql, func(string) string {
-			n++
-			return "$" + strconv.Itoa(n)
-		})
-	}
-	return sql
-}
-
-func (db *DB) blobType(size int) string {
-	switch db.dialect {
-	case SQLITE:
-		return fmt.Sprintf("blob[%d]", size)
-	case POSTGRESQL:
-		return "bytea"
-	case MYSQL:
-		return fmt.Sprintf("VARBINARY(%d)", size)
-	}
-	panic("unkown dialect")
-}
-
-func (db *DB) serialPK() string {
-	switch db.dialect {
-	case SQLITE:
-		return "integer primary key autoincrement"
-	case POSTGRESQL:
-		return "serial primary key"
-	case MYSQL:
-		return "integer primary key auto_increment"
-	}
-	panic("unkown dialect")
-}
-
-func (db *DB) now() string {
-	switch db.dialect {
-	case SQLITE:
-		return "datetime('now')"
-	case POSTGRESQL:
-		return "now()"
-	case MYSQL:
-		return "now()"
-	}
-	panic("unkown dialect")
-}
-
-func makeBench() {
-	if _, err := db.Exec("create table bench (n varchar(32), i integer, d double, s varchar(32), t datetime)"); err != nil {
-		panic(err)
-	}
-	st, err := db.Prepare("insert into bench values (?, ?, ?, ?, ?)")
-	if err != nil {
-		panic(err)
-	}
-	defer st.Close()
-	for i := 0; i < 100; i++ {
-		if _, err = st.Exec(nil, i, float64(i), fmt.Sprintf("%d", i), time.Now()); err != nil {
-			panic(err)
-		}
-	}
-}
-
-func TestResult(t *testing.T) {
-	db.tearDown()
-	db.mustExec("create temporary table test (id " + db.serialPK() + ", name varchar(10))")
-
-	for i := 1; i < 3; i++ {
-		r := db.mustExec(db.q("insert into test (name) values (?)"), fmt.Sprintf("row %d", i))
-		n, err := r.RowsAffected()
-		if err != nil {
-			t.Fatal(err)
-		}
-		if n != 1 {
-			t.Errorf("got %v, want %v", n, 1)
-		}
-		n, err = r.LastInsertId()
-		if err != nil {
-			t.Fatal(err)
-		}
-		if n != int64(i) {
-			t.Errorf("got %v, want %v", n, i)
-		}
-	}
-	if _, err := db.Exec("error!"); err == nil {
-		t.Fatalf("expected error")
-	}
-}
-
-func TestBlobs(t *testing.T) {
-	db.tearDown()
-	var blob = []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
-	db.mustExec("create table foo (id integer primary key, bar " + db.blobType(16) + ")")
-	db.mustExec(db.q("insert into foo (id, bar) values(?,?)"), 0, blob)
-
-	want := fmt.Sprintf("%x", blob)
-
-	b := make([]byte, 16)
-	err := db.QueryRow(db.q("select bar from foo where id = ?"), 0).Scan(&b)
-	got := fmt.Sprintf("%x", b)
-	if err != nil {
-		t.Errorf("[]byte scan: %v", err)
-	} else if got != want {
-		t.Errorf("for []byte, got %q; want %q", got, want)
-	}
-
-	err = db.QueryRow(db.q("select bar from foo where id = ?"), 0).Scan(&got)
-	want = string(blob)
-	if err != nil {
-		t.Errorf("string scan: %v", err)
-	} else if got != want {
-		t.Errorf("for string, got %q; want %q", got, want)
-	}
-}
-
-func TestManyQueryRow(t *testing.T) {
-	if testing.Short() {
-		t.Log("skipping in short mode")
-		return
-	}
-	db.tearDown()
-	db.mustExec("create table foo (id integer primary key, name varchar(50))")
-	db.mustExec(db.q("insert into foo (id, name) values(?,?)"), 1, "bob")
-	var name string
-	for i := 0; i < 10000; i++ {
-		err := db.QueryRow(db.q("select name from foo where id = ?"), 1).Scan(&name)
-		if err != nil || name != "bob" {
-			t.Fatalf("on query %d: err=%v, name=%q", i, err, name)
-		}
-	}
-}
-
-func TestTxQuery(t *testing.T) {
-	db.tearDown()
-	tx, err := db.Begin()
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer tx.Rollback()
-
-	_, err = tx.Exec("create table foo (id integer primary key, name varchar(50))")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	_, err = tx.Exec(db.q("insert into foo (id, name) values(?,?)"), 1, "bob")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	r, err := tx.Query(db.q("select name from foo where id = ?"), 1)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer r.Close()
-
-	if !r.Next() {
-		if r.Err() != nil {
-			t.Fatal(err)
-		}
-		t.Fatal("expected one rows")
-	}
-
-	var name string
-	err = r.Scan(&name)
-	if err != nil {
-		t.Fatal(err)
-	}
-}
-
-func TestPreparedStmt(t *testing.T) {
-	db.tearDown()
-	db.mustExec("CREATE TABLE t (count INT)")
-	sel, err := db.Prepare("SELECT count FROM t ORDER BY count DESC")
-	if err != nil {
-		t.Fatalf("prepare 1: %v", err)
-	}
-	ins, err := db.Prepare(db.q("INSERT INTO t (count) VALUES (?)"))
-	if err != nil {
-		t.Fatalf("prepare 2: %v", err)
-	}
-
-	for n := 1; n <= 3; n++ {
-		if _, err := ins.Exec(n); err != nil {
-			t.Fatalf("insert(%d) = %v", n, err)
-		}
-	}
-
-	const nRuns = 10
-	var wg sync.WaitGroup
-	for i := 0; i < nRuns; i++ {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			for j := 0; j < 10; j++ {
-				count := 0
-				if err := sel.QueryRow().Scan(&count); err != nil && err != sql.ErrNoRows {
-					t.Errorf("Query: %v", err)
-					return
-				}
-				if _, err := ins.Exec(rand.Intn(100)); err != nil {
-					t.Errorf("Insert: %v", err)
-					return
-				}
-			}
-		}()
-	}
-	wg.Wait()
-}
-
-// Benchmarks need to use panic() since b.Error errors are lost when
-// running via testing.Benchmark() I would like to run these via go
-// test -bench but calling Benchmark() from a benchmark test
-// currently hangs go.
-
-func BenchmarkExec(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		if _, err := db.Exec("select 1"); err != nil {
-			panic(err)
-		}
-	}
-}
-
-func BenchmarkQuery(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		var n sql.NullString
-		var i int
-		var f float64
-		var s string
-		//		var t time.Time
-		if err := db.QueryRow("select null, 1, 1.1, 'foo'").Scan(&n, &i, &f, &s); err != nil {
-			panic(err)
-		}
-	}
-}
-
-func BenchmarkParams(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		var n sql.NullString
-		var i int
-		var f float64
-		var s string
-		//		var t time.Time
-		if err := db.QueryRow("select ?, ?, ?, ?", nil, 1, 1.1, "foo").Scan(&n, &i, &f, &s); err != nil {
-			panic(err)
-		}
-	}
-}
-
-func BenchmarkStmt(b *testing.B) {
-	st, err := db.Prepare("select ?, ?, ?, ?")
-	if err != nil {
-		panic(err)
-	}
-	defer st.Close()
-
-	for n := 0; n < b.N; n++ {
-		var n sql.NullString
-		var i int
-		var f float64
-		var s string
-		//		var t time.Time
-		if err := st.QueryRow(nil, 1, 1.1, "foo").Scan(&n, &i, &f, &s); err != nil {
-			panic(err)
-		}
-	}
-}
-
-func BenchmarkRows(b *testing.B) {
-	db.once.Do(makeBench)
-
-	for n := 0; n < b.N; n++ {
-		var n sql.NullString
-		var i int
-		var f float64
-		var s string
-		var t time.Time
-		r, err := db.Query("select * from bench")
-		if err != nil {
-			panic(err)
-		}
-		for r.Next() {
-			if err = r.Scan(&n, &i, &f, &s, &t); err != nil {
-				panic(err)
-			}
-		}
-		if err = r.Err(); err != nil {
-			panic(err)
-		}
-	}
-}
-
-func BenchmarkStmtRows(b *testing.B) {
-	db.once.Do(makeBench)
-
-	st, err := db.Prepare("select * from bench")
-	if err != nil {
-		panic(err)
-	}
-	defer st.Close()
-
-	for n := 0; n < b.N; n++ {
-		var n sql.NullString
-		var i int
-		var f float64
-		var s string
-		var t time.Time
-		r, err := st.Query()
-		if err != nil {
-			panic(err)
-		}
-		for r.Next() {
-			if err = r.Scan(&n, &i, &f, &s, &t); err != nil {
-				panic(err)
-			}
-		}
-		if err = r.Err(); err != nil {
-			panic(err)
-		}
-	}
-}

vendor/github.com/mattn/go-sqlite3/sqlite3_trace.go

@@ -0,0 +1,285 @@
+// Copyright (C) 2016 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+// +build trace
+
+package sqlite3
+
+/*
+#ifndef USE_LIBSQLITE3
+#include <sqlite3-binding.h>
+#else
+#include <sqlite3.h>
+#endif
+#include <stdlib.h>
+
+int traceCallbackTrampoline(unsigned int traceEventCode, void *ctx, void *p, void *x);
+*/
+import "C"
+
+import (
+	"fmt"
+	"strings"
+	"sync"
+	"unsafe"
+)
+
+// Trace... constants identify the possible events causing callback invocation.
+// Values are same as the corresponding SQLite Trace Event Codes.
+const (
+	TraceStmt    = C.SQLITE_TRACE_STMT
+	TraceProfile = C.SQLITE_TRACE_PROFILE
+	TraceRow     = C.SQLITE_TRACE_ROW
+	TraceClose   = C.SQLITE_TRACE_CLOSE
+)
+
+type TraceInfo struct {
+	// Pack together the shorter fields, to keep the struct smaller.
+	// On a 64-bit machine there would be padding
+	// between EventCode and ConnHandle; having AutoCommit here is "free":
+	EventCode  uint32
+	AutoCommit bool
+	ConnHandle uintptr
+
+	// Usually filled, unless EventCode = TraceClose = SQLITE_TRACE_CLOSE:
+	// identifier for a prepared statement:
+	StmtHandle uintptr
+
+	// Two strings filled when EventCode = TraceStmt = SQLITE_TRACE_STMT:
+	// (1) either the unexpanded SQL text of the prepared statement, or
+	//     an SQL comment that indicates the invocation of a trigger;
+	// (2) expanded SQL, if requested and if (1) is not an SQL comment.
+	StmtOrTrigger string
+	ExpandedSQL   string // only if requested (TraceConfig.WantExpandedSQL = true)
+
+	// filled when EventCode = TraceProfile = SQLITE_TRACE_PROFILE:
+	// estimated number of nanoseconds that the prepared statement took to run:
+	RunTimeNanosec int64
+
+	DBError Error
+}
+
+// TraceUserCallback gives the signature for a trace function
+// provided by the user (Go application programmer).
+// SQLite 3.14 documentation (as of September 2, 2016)
+// for SQL Trace Hook = sqlite3_trace_v2():
+// The integer return value from the callback is currently ignored,
+// though this may change in future releases. Callback implementations
+// should return zero to ensure future compatibility.
+type TraceUserCallback func(TraceInfo) int
+
+type TraceConfig struct {
+	Callback        TraceUserCallback
+	EventMask       C.uint
+	WantExpandedSQL bool
+}
+
+func fillDBError(dbErr *Error, db *C.sqlite3) {
+	// See SQLiteConn.lastError(), in file 'sqlite3.go' at the time of writing (Sept 5, 2016)
+	dbErr.Code = ErrNo(C.sqlite3_errcode(db))
+	dbErr.ExtendedCode = ErrNoExtended(C.sqlite3_extended_errcode(db))
+	dbErr.err = C.GoString(C.sqlite3_errmsg(db))
+}
+
+func fillExpandedSQL(info *TraceInfo, db *C.sqlite3, pStmt unsafe.Pointer) {
+	if pStmt == nil {
+		panic("No SQLite statement pointer in P arg of trace_v2 callback")
+	}
+
+	expSQLiteCStr := C.sqlite3_expanded_sql((*C.sqlite3_stmt)(pStmt))
+	if expSQLiteCStr == nil {
+		fillDBError(&info.DBError, db)
+		return
+	}
+	info.ExpandedSQL = C.GoString(expSQLiteCStr)
+}
+
+//export traceCallbackTrampoline
+func traceCallbackTrampoline(
+	traceEventCode C.uint,
+	// Parameter named 'C' in SQLite docs = Context given at registration:
+	ctx unsafe.Pointer,
+	// Parameter named 'P' in SQLite docs (Primary event data?):
+	p unsafe.Pointer,
+	// Parameter named 'X' in SQLite docs (eXtra event data?):
+	xValue unsafe.Pointer) C.int {
+
+	if ctx == nil {
+		panic(fmt.Sprintf("No context (ev 0x%x)", traceEventCode))
+	}
+
+	contextDB := (*C.sqlite3)(ctx)
+	connHandle := uintptr(ctx)
+
+	var traceConf TraceConfig
+	var found bool
+	if traceEventCode == TraceClose {
+		// clean up traceMap: 'pop' means get and delete
+		traceConf, found = popTraceMapping(connHandle)
+	} else {
+		traceConf, found = lookupTraceMapping(connHandle)
+	}
+
+	if !found {
+		panic(fmt.Sprintf("Mapping not found for handle 0x%x (ev 0x%x)",
+			connHandle, traceEventCode))
+	}
+
+	var info TraceInfo
+
+	info.EventCode = uint32(traceEventCode)
+	info.AutoCommit = (int(C.sqlite3_get_autocommit(contextDB)) != 0)
+	info.ConnHandle = connHandle
+
+	switch traceEventCode {
+	case TraceStmt:
+		info.StmtHandle = uintptr(p)
+
+		var xStr string
+		if xValue != nil {
+			xStr = C.GoString((*C.char)(xValue))
+		}
+		info.StmtOrTrigger = xStr
+		if !strings.HasPrefix(xStr, "--") {
+			// Not SQL comment, therefore the current event
+			// is not related to a trigger.
+			// The user might want to receive the expanded SQL;
+			// let's check:
+			if traceConf.WantExpandedSQL {
+				fillExpandedSQL(&info, contextDB, p)
+			}
+		}
+
+	case TraceProfile:
+		info.StmtHandle = uintptr(p)
+
+		if xValue == nil {
+			panic("NULL pointer in X arg of trace_v2 callback for SQLITE_TRACE_PROFILE event")
+		}
+
+		info.RunTimeNanosec = *(*int64)(xValue)
+
+		// sample the error //TODO: is it safe? is it useful?
+		fillDBError(&info.DBError, contextDB)
+
+	case TraceRow:
+		info.StmtHandle = uintptr(p)
+
+	case TraceClose:
+		handle := uintptr(p)
+		if handle != info.ConnHandle {
+			panic(fmt.Sprintf("Different conn handle 0x%x (expected 0x%x) in SQLITE_TRACE_CLOSE event.",
+				handle, info.ConnHandle))
+		}
+
+	default:
+		// Pass unsupported events to the user callback (if configured);
+		// let the user callback decide whether to panic or ignore them.
+	}
+
+	// Do not execute user callback when the event was not requested by user!
+	// Remember that the Close event is always selected when
+	// registering this callback trampoline with SQLite --- for cleanup.
+	// In the future there may be more events forced to "selected" in SQLite
+	// for the driver's needs.
+	if traceConf.EventMask&traceEventCode == 0 {
+		return 0
+	}
+
+	r := 0
+	if traceConf.Callback != nil {
+		r = traceConf.Callback(info)
+	}
+	return C.int(r)
+}
+
+type traceMapEntry struct {
+	config TraceConfig
+}
+
+var traceMapLock sync.Mutex
+var traceMap = make(map[uintptr]traceMapEntry)
+
+func addTraceMapping(connHandle uintptr, traceConf TraceConfig) {
+	traceMapLock.Lock()
+	defer traceMapLock.Unlock()
+
+	oldEntryCopy, found := traceMap[connHandle]
+	if found {
+		panic(fmt.Sprintf("Adding trace config %v: handle 0x%x already registered (%v).",
+			traceConf, connHandle, oldEntryCopy.config))
+	}
+	traceMap[connHandle] = traceMapEntry{config: traceConf}
+	fmt.Printf("Added trace config %v: handle 0x%x.\n", traceConf, connHandle)
+}
+
+func lookupTraceMapping(connHandle uintptr) (TraceConfig, bool) {
+	traceMapLock.Lock()
+	defer traceMapLock.Unlock()
+
+	entryCopy, found := traceMap[connHandle]
+	return entryCopy.config, found
+}
+
+// 'pop' = get and delete from map before returning the value to the caller
+func popTraceMapping(connHandle uintptr) (TraceConfig, bool) {
+	traceMapLock.Lock()
+	defer traceMapLock.Unlock()
+
+	entryCopy, found := traceMap[connHandle]
+	if found {
+		delete(traceMap, connHandle)
+		fmt.Printf("Pop handle 0x%x: deleted trace config %v.\n", connHandle, entryCopy.config)
+	}
+	return entryCopy.config, found
+}
+
+// SetTrace installs or removes the trace callback for the given database connection.
+// It's not named 'RegisterTrace' because only one callback can be kept and called.
+// Calling SetTrace a second time on same database connection
+// overrides (cancels) any prior callback and all its settings:
+// event mask, etc.
+func (c *SQLiteConn) SetTrace(requested *TraceConfig) error {
+	connHandle := uintptr(unsafe.Pointer(c.db))
+
+	_, _ = popTraceMapping(connHandle)
+
+	if requested == nil {
+		// The traceMap entry was deleted already by popTraceMapping():
+		// can disable all events now, no need to watch for TraceClose.
+		err := c.setSQLiteTrace(0)
+		return err
+	}
+
+	reqCopy := *requested
+
+	// Disable potentially expensive operations
+	// if their result will not be used. We are doing this
+	// just in case the caller provided nonsensical input.
+	if reqCopy.EventMask&TraceStmt == 0 {
+		reqCopy.WantExpandedSQL = false
+	}
+
+	addTraceMapping(connHandle, reqCopy)
+
+	// The callback trampoline function does cleanup on Close event,
+	// regardless of the presence or absence of the user callback.
+	// Therefore it needs the Close event to be selected:
+	actualEventMask := uint(reqCopy.EventMask | TraceClose)
+	err := c.setSQLiteTrace(actualEventMask)
+	return err
+}
+
+func (c *SQLiteConn) setSQLiteTrace(sqliteEventMask uint) error {
+	rv := C.sqlite3_trace_v2(c.db,
+		C.uint(sqliteEventMask),
+		(*[0]byte)(unsafe.Pointer(C.traceCallbackTrampoline)),
+		unsafe.Pointer(c.db)) // Fourth arg is same as first: we are
+	// passing the database connection handle as callback context.
+
+	if rv != C.SQLITE_OK {
+		return c.lastError()
+	}
+	return nil
+}

vendor/github.com/mattn/go-sqlite3/sqlite3_type.go

@@ -0,0 +1,57 @@
+package sqlite3
+
+/*
+#ifndef USE_LIBSQLITE3
+#include <sqlite3-binding.h>
+#else
+#include <sqlite3.h>
+#endif
+*/
+import "C"
+import (
+	"reflect"
+	"time"
+)
+
+// ColumnTypeDatabaseTypeName implement RowsColumnTypeDatabaseTypeName.
+func (rc *SQLiteRows) ColumnTypeDatabaseTypeName(i int) string {
+	return C.GoString(C.sqlite3_column_decltype(rc.s.s, C.int(i)))
+}
+
+/*
+func (rc *SQLiteRows) ColumnTypeLength(index int) (length int64, ok bool) {
+	return 0, false
+}
+
+func (rc *SQLiteRows) ColumnTypePrecisionScale(index int) (precision, scale int64, ok bool) {
+	return 0, 0, false
+}
+*/
+
+// ColumnTypeNullable implement RowsColumnTypeNullable.
+func (rc *SQLiteRows) ColumnTypeNullable(i int) (nullable, ok bool) {
+	return true, true
+}
+
+// ColumnTypeScanType implement RowsColumnTypeScanType.
+func (rc *SQLiteRows) ColumnTypeScanType(i int) reflect.Type {
+	switch C.sqlite3_column_type(rc.s.s, C.int(i)) {
+	case C.SQLITE_INTEGER:
+		switch C.GoString(C.sqlite3_column_decltype(rc.s.s, C.int(i))) {
+		case "timestamp", "datetime", "date":
+			return reflect.TypeOf(time.Time{})
+		case "boolean":
+			return reflect.TypeOf(false)
+		}
+		return reflect.TypeOf(int64(0))
+	case C.SQLITE_FLOAT:
+		return reflect.TypeOf(float64(0))
+	case C.SQLITE_BLOB:
+		return reflect.SliceOf(reflect.TypeOf(byte(0)))
+	case C.SQLITE_NULL:
+		return reflect.TypeOf(nil)
+	case C.SQLITE_TEXT:
+		return reflect.TypeOf("")
+	}
+	return reflect.SliceOf(reflect.TypeOf(byte(0)))
+}

vendor/github.com/mattn/go-sqlite3/sqlite3_vtable.go

@@ -0,0 +1,646 @@
+// Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+// +build vtable
+
+package sqlite3
+
+/*
+#cgo CFLAGS: -std=gnu99
+#cgo CFLAGS: -DSQLITE_ENABLE_RTREE -DSQLITE_THREADSAFE
+#cgo CFLAGS: -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS4_UNICODE61
+#cgo CFLAGS: -DSQLITE_TRACE_SIZE_LIMIT=15
+#cgo CFLAGS: -DSQLITE_ENABLE_COLUMN_METADATA=1
+#cgo CFLAGS: -Wno-deprecated-declarations
+
+#ifndef USE_LIBSQLITE3
+#include <sqlite3-binding.h>
+#else
+#include <sqlite3.h>
+#endif
+#include <stdlib.h>
+#include <stdint.h>
+#include <memory.h>
+
+static inline char *_sqlite3_mprintf(char *zFormat, char *arg) {
+  return sqlite3_mprintf(zFormat, arg);
+}
+
+typedef struct goVTab goVTab;
+
+struct goVTab {
+	sqlite3_vtab base;
+	void *vTab;
+};
+
+uintptr_t goMInit(void *db, void *pAux, int argc, char **argv, char **pzErr, int isCreate);
+
+static int cXInit(sqlite3 *db, void *pAux, int argc, const char *const*argv, sqlite3_vtab **ppVTab, char **pzErr, int isCreate) {
+	void *vTab = (void *)goMInit(db, pAux, argc, (char**)argv, pzErr, isCreate);
+	if (!vTab || *pzErr) {
+		return SQLITE_ERROR;
+	}
+	goVTab *pvTab = (goVTab *)sqlite3_malloc(sizeof(goVTab));
+	if (!pvTab) {
+		*pzErr = sqlite3_mprintf("%s", "Out of memory");
+		return SQLITE_NOMEM;
+	}
+	memset(pvTab, 0, sizeof(goVTab));
+	pvTab->vTab = vTab;
+
+	*ppVTab = (sqlite3_vtab *)pvTab;
+	*pzErr = 0;
+	return SQLITE_OK;
+}
+
+static inline int cXCreate(sqlite3 *db, void *pAux, int argc, const char *const*argv, sqlite3_vtab **ppVTab, char **pzErr) {
+	return cXInit(db, pAux, argc, argv, ppVTab, pzErr, 1);
+}
+static inline int cXConnect(sqlite3 *db, void *pAux, int argc, const char *const*argv, sqlite3_vtab **ppVTab, char **pzErr) {
+	return cXInit(db, pAux, argc, argv, ppVTab, pzErr, 0);
+}
+
+char* goVBestIndex(void *pVTab, void *icp);
+
+static inline int cXBestIndex(sqlite3_vtab *pVTab, sqlite3_index_info *info) {
+	char *pzErr = goVBestIndex(((goVTab*)pVTab)->vTab, info);
+	if (pzErr) {
+		if (pVTab->zErrMsg)
+			sqlite3_free(pVTab->zErrMsg);
+		pVTab->zErrMsg = pzErr;
+		return SQLITE_ERROR;
+	}
+	return SQLITE_OK;
+}
+
+char* goVRelease(void *pVTab, int isDestroy);
+
+static int cXRelease(sqlite3_vtab *pVTab, int isDestroy) {
+	char *pzErr = goVRelease(((goVTab*)pVTab)->vTab, isDestroy);
+	if (pzErr) {
+		if (pVTab->zErrMsg)
+			sqlite3_free(pVTab->zErrMsg);
+		pVTab->zErrMsg = pzErr;
+		return SQLITE_ERROR;
+	}
+	if (pVTab->zErrMsg)
+		sqlite3_free(pVTab->zErrMsg);
+	sqlite3_free(pVTab);
+	return SQLITE_OK;
+}
+
+static inline int cXDisconnect(sqlite3_vtab *pVTab) {
+	return cXRelease(pVTab, 0);
+}
+static inline int cXDestroy(sqlite3_vtab *pVTab) {
+	return cXRelease(pVTab, 1);
+}
+
+typedef struct goVTabCursor goVTabCursor;
+
+struct goVTabCursor {
+	sqlite3_vtab_cursor base;
+	void *vTabCursor;
+};
+
+uintptr_t goVOpen(void *pVTab, char **pzErr);
+
+static int cXOpen(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCursor) {
+	void *vTabCursor = (void *)goVOpen(((goVTab*)pVTab)->vTab, &(pVTab->zErrMsg));
+	goVTabCursor *pCursor = (goVTabCursor *)sqlite3_malloc(sizeof(goVTabCursor));
+	if (!pCursor) {
+		return SQLITE_NOMEM;
+	}
+	memset(pCursor, 0, sizeof(goVTabCursor));
+	pCursor->vTabCursor = vTabCursor;
+	*ppCursor = (sqlite3_vtab_cursor *)pCursor;
+	return SQLITE_OK;
+}
+
+static int setErrMsg(sqlite3_vtab_cursor *pCursor, char *pzErr) {
+	if (pCursor->pVtab->zErrMsg)
+		sqlite3_free(pCursor->pVtab->zErrMsg);
+	pCursor->pVtab->zErrMsg = pzErr;
+	return SQLITE_ERROR;
+}
+
+char* goVClose(void *pCursor);
+
+static int cXClose(sqlite3_vtab_cursor *pCursor) {
+	char *pzErr = goVClose(((goVTabCursor*)pCursor)->vTabCursor);
+	if (pzErr) {
+		return setErrMsg(pCursor, pzErr);
+	}
+	sqlite3_free(pCursor);
+	return SQLITE_OK;
+}
+
+char* goVFilter(void *pCursor, int idxNum, char* idxName, int argc, sqlite3_value **argv);
+
+static int cXFilter(sqlite3_vtab_cursor *pCursor, int idxNum, const char *idxStr, int argc, sqlite3_value **argv) {
+	char *pzErr = goVFilter(((goVTabCursor*)pCursor)->vTabCursor, idxNum, (char*)idxStr, argc, argv);
+	if (pzErr) {
+		return setErrMsg(pCursor, pzErr);
+	}
+	return SQLITE_OK;
+}
+
+char* goVNext(void *pCursor);
+
+static int cXNext(sqlite3_vtab_cursor *pCursor) {
+	char *pzErr = goVNext(((goVTabCursor*)pCursor)->vTabCursor);
+	if (pzErr) {
+		return setErrMsg(pCursor, pzErr);
+	}
+	return SQLITE_OK;
+}
+
+int goVEof(void *pCursor);
+
+static inline int cXEof(sqlite3_vtab_cursor *pCursor) {
+	return goVEof(((goVTabCursor*)pCursor)->vTabCursor);
+}
+
+char* goVColumn(void *pCursor, void *cp, int col);
+
+static int cXColumn(sqlite3_vtab_cursor *pCursor, sqlite3_context *ctx, int i) {
+	char *pzErr = goVColumn(((goVTabCursor*)pCursor)->vTabCursor, ctx, i);
+	if (pzErr) {
+		return setErrMsg(pCursor, pzErr);
+	}
+	return SQLITE_OK;
+}
+
+char* goVRowid(void *pCursor, sqlite3_int64 *pRowid);
+
+static int cXRowid(sqlite3_vtab_cursor *pCursor, sqlite3_int64 *pRowid) {
+	char *pzErr = goVRowid(((goVTabCursor*)pCursor)->vTabCursor, pRowid);
+	if (pzErr) {
+		return setErrMsg(pCursor, pzErr);
+	}
+	return SQLITE_OK;
+}
+
+char* goVUpdate(void *pVTab, int argc, sqlite3_value **argv, sqlite3_int64 *pRowid);
+
+static int cXUpdate(sqlite3_vtab *pVTab, int argc, sqlite3_value **argv, sqlite3_int64 *pRowid) {
+	char *pzErr = goVUpdate(((goVTab*)pVTab)->vTab, argc, argv, pRowid);
+	if (pzErr) {
+		if (pVTab->zErrMsg)
+			sqlite3_free(pVTab->zErrMsg);
+		pVTab->zErrMsg = pzErr;
+		return SQLITE_ERROR;
+	}
+	return SQLITE_OK;
+}
+
+static sqlite3_module goModule = {
+	0,                       // iVersion
+	cXCreate,                // xCreate - create a table
+	cXConnect,               // xConnect - connect to an existing table
+	cXBestIndex,             // xBestIndex - Determine search strategy
+	cXDisconnect,            // xDisconnect - Disconnect from a table
+	cXDestroy,               // xDestroy - Drop a table
+	cXOpen,                  // xOpen - open a cursor
+	cXClose,                 // xClose - close a cursor
+	cXFilter,                // xFilter - configure scan constraints
+	cXNext,                  // xNext - advance a cursor
+	cXEof,                   // xEof
+	cXColumn,                // xColumn - read data
+	cXRowid,                 // xRowid - read data
+	cXUpdate,                // xUpdate - write data
+// Not implemented
+	0,                       // xBegin - begin transaction
+	0,                       // xSync - sync transaction
+	0,                       // xCommit - commit transaction
+	0,                       // xRollback - rollback transaction
+	0,                       // xFindFunction - function overloading
+	0,                       // xRename - rename the table
+	0,                       // xSavepoint
+	0,                       // xRelease
+	0	                     // xRollbackTo
+};
+
+void goMDestroy(void*);
+
+static int _sqlite3_create_module(sqlite3 *db, const char *zName, uintptr_t pClientData) {
+  return sqlite3_create_module_v2(db, zName, &goModule, (void*) pClientData, goMDestroy);
+}
+*/
+import "C"
+
+import (
+	"fmt"
+	"math"
+	"reflect"
+	"unsafe"
+)
+
+type sqliteModule struct {
+	c      *SQLiteConn
+	name   string
+	module Module
+}
+
+type sqliteVTab struct {
+	module *sqliteModule
+	vTab   VTab
+}
+
+type sqliteVTabCursor struct {
+	vTab       *sqliteVTab
+	vTabCursor VTabCursor
+}
+
+// Op is type of operations.
+type Op uint8
+
+// Op mean identity of operations.
+const (
+	OpEQ         Op = 2
+	OpGT            = 4
+	OpLE            = 8
+	OpLT            = 16
+	OpGE            = 32
+	OpMATCH         = 64
+	OpLIKE          = 65 /* 3.10.0 and later only */
+	OpGLOB          = 66 /* 3.10.0 and later only */
+	OpREGEXP        = 67 /* 3.10.0 and later only */
+	OpScanUnique    = 1  /* Scan visits at most 1 row */
+)
+
+// InfoConstraint give information of constraint.
+type InfoConstraint struct {
+	Column int
+	Op     Op
+	Usable bool
+}
+
+// InfoOrderBy give information of order-by.
+type InfoOrderBy struct {
+	Column int
+	Desc   bool
+}
+
+func constraints(info *C.sqlite3_index_info) []InfoConstraint {
+	l := info.nConstraint
+	slice := (*[1 << 30]C.struct_sqlite3_index_constraint)(unsafe.Pointer(info.aConstraint))[:l:l]
+
+	cst := make([]InfoConstraint, 0, l)
+	for _, c := range slice {
+		var usable bool
+		if c.usable > 0 {
+			usable = true
+		}
+		cst = append(cst, InfoConstraint{
+			Column: int(c.iColumn),
+			Op:     Op(c.op),
+			Usable: usable,
+		})
+	}
+	return cst
+}
+
+func orderBys(info *C.sqlite3_index_info) []InfoOrderBy {
+	l := info.nOrderBy
+	slice := (*[1 << 30]C.struct_sqlite3_index_orderby)(unsafe.Pointer(info.aOrderBy))[:l:l]
+
+	ob := make([]InfoOrderBy, 0, l)
+	for _, c := range slice {
+		var desc bool
+		if c.desc > 0 {
+			desc = true
+		}
+		ob = append(ob, InfoOrderBy{
+			Column: int(c.iColumn),
+			Desc:   desc,
+		})
+	}
+	return ob
+}
+
+// IndexResult is a Go struct representation of what eventually ends up in the
+// output fields for `sqlite3_index_info`
+// See: https://www.sqlite.org/c3ref/index_info.html
+type IndexResult struct {
+	Used           []bool // aConstraintUsage
+	IdxNum         int
+	IdxStr         string
+	AlreadyOrdered bool // orderByConsumed
+	EstimatedCost  float64
+	EstimatedRows  float64
+}
+
+// mPrintf is a utility wrapper around sqlite3_mprintf
+func mPrintf(format, arg string) *C.char {
+	cf := C.CString(format)
+	defer C.free(unsafe.Pointer(cf))
+	ca := C.CString(arg)
+	defer C.free(unsafe.Pointer(ca))
+	return C._sqlite3_mprintf(cf, ca)
+}
+
+//export goMInit
+func goMInit(db, pClientData unsafe.Pointer, argc C.int, argv **C.char, pzErr **C.char, isCreate C.int) C.uintptr_t {
+	m := lookupHandle(uintptr(pClientData)).(*sqliteModule)
+	if m.c.db != (*C.sqlite3)(db) {
+		*pzErr = mPrintf("%s", "Inconsistent db handles")
+		return 0
+	}
+	args := make([]string, argc)
+	var A []*C.char
+	slice := reflect.SliceHeader{Data: uintptr(unsafe.Pointer(argv)), Len: int(argc), Cap: int(argc)}
+	a := reflect.NewAt(reflect.TypeOf(A), unsafe.Pointer(&slice)).Elem().Interface()
+	for i, s := range a.([]*C.char) {
+		args[i] = C.GoString(s)
+	}
+	var vTab VTab
+	var err error
+	if isCreate == 1 {
+		vTab, err = m.module.Create(m.c, args)
+	} else {
+		vTab, err = m.module.Connect(m.c, args)
+	}
+
+	if err != nil {
+		*pzErr = mPrintf("%s", err.Error())
+		return 0
+	}
+	vt := sqliteVTab{m, vTab}
+	*pzErr = nil
+	return C.uintptr_t(newHandle(m.c, &vt))
+}
+
+//export goVRelease
+func goVRelease(pVTab unsafe.Pointer, isDestroy C.int) *C.char {
+	vt := lookupHandle(uintptr(pVTab)).(*sqliteVTab)
+	var err error
+	if isDestroy == 1 {
+		err = vt.vTab.Destroy()
+	} else {
+		err = vt.vTab.Disconnect()
+	}
+	if err != nil {
+		return mPrintf("%s", err.Error())
+	}
+	return nil
+}
+
+//export goVOpen
+func goVOpen(pVTab unsafe.Pointer, pzErr **C.char) C.uintptr_t {
+	vt := lookupHandle(uintptr(pVTab)).(*sqliteVTab)
+	vTabCursor, err := vt.vTab.Open()
+	if err != nil {
+		*pzErr = mPrintf("%s", err.Error())
+		return 0
+	}
+	vtc := sqliteVTabCursor{vt, vTabCursor}
+	*pzErr = nil
+	return C.uintptr_t(newHandle(vt.module.c, &vtc))
+}
+
+//export goVBestIndex
+func goVBestIndex(pVTab unsafe.Pointer, icp unsafe.Pointer) *C.char {
+	vt := lookupHandle(uintptr(pVTab)).(*sqliteVTab)
+	info := (*C.sqlite3_index_info)(icp)
+	csts := constraints(info)
+	res, err := vt.vTab.BestIndex(csts, orderBys(info))
+	if err != nil {
+		return mPrintf("%s", err.Error())
+	}
+	if len(res.Used) != len(csts) {
+		return mPrintf("Result.Used != expected value", "")
+	}
+
+	// Get a pointer to constraint_usage struct so we can update in place.
+	l := info.nConstraint
+	s := (*[1 << 30]C.struct_sqlite3_index_constraint_usage)(unsafe.Pointer(info.aConstraintUsage))[:l:l]
+	index := 1
+	for i := C.int(0); i < info.nConstraint; i++ {
+		if res.Used[i] {
+			s[i].argvIndex = C.int(index)
+			s[i].omit = C.uchar(1)
+			index++
+		}
+	}
+
+	info.idxNum = C.int(res.IdxNum)
+	idxStr := C.CString(res.IdxStr)
+	defer C.free(unsafe.Pointer(idxStr))
+	info.idxStr = idxStr
+	info.needToFreeIdxStr = C.int(0)
+	if res.AlreadyOrdered {
+		info.orderByConsumed = C.int(1)
+	}
+	info.estimatedCost = C.double(res.EstimatedCost)
+	info.estimatedRows = C.sqlite3_int64(res.EstimatedRows)
+
+	return nil
+}
+
+//export goVClose
+func goVClose(pCursor unsafe.Pointer) *C.char {
+	vtc := lookupHandle(uintptr(pCursor)).(*sqliteVTabCursor)
+	err := vtc.vTabCursor.Close()
+	if err != nil {
+		return mPrintf("%s", err.Error())
+	}
+	return nil
+}
+
+//export goMDestroy
+func goMDestroy(pClientData unsafe.Pointer) {
+	m := lookupHandle(uintptr(pClientData)).(*sqliteModule)
+	m.module.DestroyModule()
+}
+
+//export goVFilter
+func goVFilter(pCursor unsafe.Pointer, idxNum C.int, idxName *C.char, argc C.int, argv **C.sqlite3_value) *C.char {
+	vtc := lookupHandle(uintptr(pCursor)).(*sqliteVTabCursor)
+	args := (*[(math.MaxInt32 - 1) / unsafe.Sizeof((*C.sqlite3_value)(nil))]*C.sqlite3_value)(unsafe.Pointer(argv))[:argc:argc]
+	vals := make([]interface{}, 0, argc)
+	for _, v := range args {
+		conv, err := callbackArgGeneric(v)
+		if err != nil {
+			return mPrintf("%s", err.Error())
+		}
+		vals = append(vals, conv.Interface())
+	}
+	err := vtc.vTabCursor.Filter(int(idxNum), C.GoString(idxName), vals)
+	if err != nil {
+		return mPrintf("%s", err.Error())
+	}
+	return nil
+}
+
+//export goVNext
+func goVNext(pCursor unsafe.Pointer) *C.char {
+	vtc := lookupHandle(uintptr(pCursor)).(*sqliteVTabCursor)
+	err := vtc.vTabCursor.Next()
+	if err != nil {
+		return mPrintf("%s", err.Error())
+	}
+	return nil
+}
+
+//export goVEof
+func goVEof(pCursor unsafe.Pointer) C.int {
+	vtc := lookupHandle(uintptr(pCursor)).(*sqliteVTabCursor)
+	err := vtc.vTabCursor.EOF()
+	if err {
+		return 1
+	}
+	return 0
+}
+
+//export goVColumn
+func goVColumn(pCursor, cp unsafe.Pointer, col C.int) *C.char {
+	vtc := lookupHandle(uintptr(pCursor)).(*sqliteVTabCursor)
+	c := (*SQLiteContext)(cp)
+	err := vtc.vTabCursor.Column(c, int(col))
+	if err != nil {
+		return mPrintf("%s", err.Error())
+	}
+	return nil
+}
+
+//export goVRowid
+func goVRowid(pCursor unsafe.Pointer, pRowid *C.sqlite3_int64) *C.char {
+	vtc := lookupHandle(uintptr(pCursor)).(*sqliteVTabCursor)
+	rowid, err := vtc.vTabCursor.Rowid()
+	if err != nil {
+		return mPrintf("%s", err.Error())
+	}
+	*pRowid = C.sqlite3_int64(rowid)
+	return nil
+}
+
+//export goVUpdate
+func goVUpdate(pVTab unsafe.Pointer, argc C.int, argv **C.sqlite3_value, pRowid *C.sqlite3_int64) *C.char {
+	vt := lookupHandle(uintptr(pVTab)).(*sqliteVTab)
+
+	var tname string
+	if n, ok := vt.vTab.(interface {
+		TableName() string
+	}); ok {
+		tname = n.TableName() + " "
+	}
+
+	err := fmt.Errorf("virtual %s table %sis read-only", vt.module.name, tname)
+	if v, ok := vt.vTab.(VTabUpdater); ok {
+		// convert argv
+		args := (*[(math.MaxInt32 - 1) / unsafe.Sizeof((*C.sqlite3_value)(nil))]*C.sqlite3_value)(unsafe.Pointer(argv))[:argc:argc]
+		vals := make([]interface{}, 0, argc)
+		for _, v := range args {
+			conv, err := callbackArgGeneric(v)
+			if err != nil {
+				return mPrintf("%s", err.Error())
+			}
+
+			// work around for SQLITE_NULL
+			x := conv.Interface()
+			if z, ok := x.([]byte); ok && z == nil {
+				x = nil
+			}
+
+			vals = append(vals, x)
+		}
+
+		switch {
+		case argc == 1:
+			err = v.Delete(vals[0])
+
+		case argc > 1 && vals[0] == nil:
+			var id int64
+			id, err = v.Insert(vals[1], vals[2:])
+			if err == nil {
+				*pRowid = C.sqlite3_int64(id)
+			}
+
+		case argc > 1:
+			err = v.Update(vals[1], vals[2:])
+		}
+	}
+
+	if err != nil {
+		return mPrintf("%s", err.Error())
+	}
+
+	return nil
+}
+
+// Module is a "virtual table module", it defines the implementation of a
+// virtual tables. See: http://sqlite.org/c3ref/module.html
+type Module interface {
+	// http://sqlite.org/vtab.html#xcreate
+	Create(c *SQLiteConn, args []string) (VTab, error)
+	// http://sqlite.org/vtab.html#xconnect
+	Connect(c *SQLiteConn, args []string) (VTab, error)
+	// http://sqlite.org/c3ref/create_module.html
+	DestroyModule()
+}
+
+// VTab describes a particular instance of the virtual table.
+// See: http://sqlite.org/c3ref/vtab.html
+type VTab interface {
+	// http://sqlite.org/vtab.html#xbestindex
+	BestIndex([]InfoConstraint, []InfoOrderBy) (*IndexResult, error)
+	// http://sqlite.org/vtab.html#xdisconnect
+	Disconnect() error
+	// http://sqlite.org/vtab.html#sqlite3_module.xDestroy
+	Destroy() error
+	// http://sqlite.org/vtab.html#xopen
+	Open() (VTabCursor, error)
+}
+
+// VTabUpdater is a type that allows a VTab to be inserted, updated, or
+// deleted.
+// See: https://sqlite.org/vtab.html#xupdate
+type VTabUpdater interface {
+	Delete(interface{}) error
+	Insert(interface{}, []interface{}) (int64, error)
+	Update(interface{}, []interface{}) error
+}
+
+// VTabCursor describes cursors that point into the virtual table and are used
+// to loop through the virtual table. See: http://sqlite.org/c3ref/vtab_cursor.html
+type VTabCursor interface {
+	// http://sqlite.org/vtab.html#xclose
+	Close() error
+	// http://sqlite.org/vtab.html#xfilter
+	Filter(idxNum int, idxStr string, vals []interface{}) error
+	// http://sqlite.org/vtab.html#xnext
+	Next() error
+	// http://sqlite.org/vtab.html#xeof
+	EOF() bool
+	// http://sqlite.org/vtab.html#xcolumn
+	Column(c *SQLiteContext, col int) error
+	// http://sqlite.org/vtab.html#xrowid
+	Rowid() (int64, error)
+}
+
+// DeclareVTab declares the Schema of a virtual table.
+// See: http://sqlite.org/c3ref/declare_vtab.html
+func (c *SQLiteConn) DeclareVTab(sql string) error {
+	zSQL := C.CString(sql)
+	defer C.free(unsafe.Pointer(zSQL))
+	rv := C.sqlite3_declare_vtab(c.db, zSQL)
+	if rv != C.SQLITE_OK {
+		return c.lastError()
+	}
+	return nil
+}
+
+// CreateModule registers a virtual table implementation.
+// See: http://sqlite.org/c3ref/create_module.html
+func (c *SQLiteConn) CreateModule(moduleName string, module Module) error {
+	mname := C.CString(moduleName)
+	defer C.free(unsafe.Pointer(mname))
+	udm := sqliteModule{c, moduleName, module}
+	rv := C._sqlite3_create_module(c.db, mname, C.uintptr_t(newHandle(c, &udm)))
+	if rv != C.SQLITE_OK {
+		return c.lastError()
+	}
+	return nil
+}

vendor/github.com/mattn/go-sqlite3/sqlite3ext.h

@@ -1,3 +1,4 @@
+#ifndef USE_LIBSQLITE3
 /*
 ** 2006 June 7
 **
@@ -15,12 +16,10 @@
 ** as extensions by SQLite should #include this file instead of 
 ** sqlite3.h.
 */
-#ifndef _SQLITE3EXT_H_
-#define _SQLITE3EXT_H_
+#ifndef SQLITE3EXT_H
+#define SQLITE3EXT_H
 #include "sqlite3-binding.h"
 
-typedef struct sqlite3_api_routines sqlite3_api_routines;
-
 /*
 ** The following structure holds pointers to all of the SQLite API
 ** routines.
@@ -136,7 +135,7 @@ struct sqlite3_api_routines {
   int  (*set_authorizer)(sqlite3*,int(*)(void*,int,const char*,const char*,
                          const char*,const char*),void*);
   void  (*set_auxdata)(sqlite3_context*,int,void*,void (*)(void*));
-  char * (*snprintf)(int,char*,const char*,...);
+  char * (*xsnprintf)(int,char*,const char*,...);
   int  (*step)(sqlite3_stmt*);
   int  (*table_column_metadata)(sqlite3*,const char*,const char*,const char*,
                                 char const**,char const**,int*,int*,int*);
@@ -248,7 +247,7 @@ struct sqlite3_api_routines {
   int (*uri_boolean)(const char*,const char*,int);
   sqlite3_int64 (*uri_int64)(const char*,const char*,sqlite3_int64);
   const char *(*uri_parameter)(const char*,const char*);
-  char *(*vsnprintf)(int,char*,const char*,va_list);
+  char *(*xvsnprintf)(int,char*,const char*,va_list);
   int (*wal_checkpoint_v2)(sqlite3*,const char*,int,int*,int*);
   /* Version 3.8.7 and later */
   int (*auto_extension)(void(*)(void));
@@ -279,8 +278,33 @@ struct sqlite3_api_routines {
   int (*status64)(int,sqlite3_int64*,sqlite3_int64*,int);
   int (*strlike)(const char*,const char*,unsigned int);
   int (*db_cacheflush)(sqlite3*);
+  /* Version 3.12.0 and later */
+  int (*system_errno)(sqlite3*);
+  /* Version 3.14.0 and later */
+  int (*trace_v2)(sqlite3*,unsigned,int(*)(unsigned,void*,void*,void*),void*);
+  char *(*expanded_sql)(sqlite3_stmt*);
+  /* Version 3.18.0 and later */
+  void (*set_last_insert_rowid)(sqlite3*,sqlite3_int64);
+  /* Version 3.20.0 and later */
+  int (*prepare_v3)(sqlite3*,const char*,int,unsigned int,
+                    sqlite3_stmt**,const char**);
+  int (*prepare16_v3)(sqlite3*,const void*,int,unsigned int,
+                      sqlite3_stmt**,const void**);
+  int (*bind_pointer)(sqlite3_stmt*,int,void*,const char*,void(*)(void*));
+  void (*result_pointer)(sqlite3_context*,void*,const char*,void(*)(void*));
+  void *(*value_pointer)(sqlite3_value*,const char*);
 };
 
+/*
+** This is the function signature used for all extension entry points.  It
+** is also defined in the file "loadext.c".
+*/
+typedef int (*sqlite3_loadext_entry)(
+  sqlite3 *db,                       /* Handle to the database. */
+  char **pzErrMsg,                   /* Used to set error string on failure. */
+  const sqlite3_api_routines *pThunk /* Extension API function pointers. */
+);
+
 /*
 ** The following macros redefine the API routines so that they are
 ** redirected through the global sqlite3_api structure.
@@ -395,7 +419,7 @@ struct sqlite3_api_routines {
 #define sqlite3_rollback_hook          sqlite3_api->rollback_hook
 #define sqlite3_set_authorizer         sqlite3_api->set_authorizer
 #define sqlite3_set_auxdata            sqlite3_api->set_auxdata
-#define sqlite3_snprintf               sqlite3_api->snprintf
+#define sqlite3_snprintf               sqlite3_api->xsnprintf
 #define sqlite3_step                   sqlite3_api->step
 #define sqlite3_table_column_metadata  sqlite3_api->table_column_metadata
 #define sqlite3_thread_cleanup         sqlite3_api->thread_cleanup
@@ -419,7 +443,7 @@ struct sqlite3_api_routines {
 #define sqlite3_value_text16le         sqlite3_api->value_text16le
 #define sqlite3_value_type             sqlite3_api->value_type
 #define sqlite3_vmprintf               sqlite3_api->vmprintf
-#define sqlite3_vsnprintf              sqlite3_api->vsnprintf
+#define sqlite3_vsnprintf              sqlite3_api->xvsnprintf
 #define sqlite3_overload_function      sqlite3_api->overload_function
 #define sqlite3_prepare_v2             sqlite3_api->prepare_v2
 #define sqlite3_prepare16_v2           sqlite3_api->prepare16_v2
@@ -495,7 +519,7 @@ struct sqlite3_api_routines {
 #define sqlite3_uri_boolean            sqlite3_api->uri_boolean
 #define sqlite3_uri_int64              sqlite3_api->uri_int64
 #define sqlite3_uri_parameter          sqlite3_api->uri_parameter
-#define sqlite3_uri_vsnprintf          sqlite3_api->vsnprintf
+#define sqlite3_uri_vsnprintf          sqlite3_api->xvsnprintf
 #define sqlite3_wal_checkpoint_v2      sqlite3_api->wal_checkpoint_v2
 /* Version 3.8.7 and later */
 #define sqlite3_auto_extension         sqlite3_api->auto_extension
@@ -522,6 +546,19 @@ struct sqlite3_api_routines {
 #define sqlite3_status64               sqlite3_api->status64
 #define sqlite3_strlike                sqlite3_api->strlike
 #define sqlite3_db_cacheflush          sqlite3_api->db_cacheflush
+/* Version 3.12.0 and later */
+#define sqlite3_system_errno           sqlite3_api->system_errno
+/* Version 3.14.0 and later */
+#define sqlite3_trace_v2               sqlite3_api->trace_v2
+#define sqlite3_expanded_sql           sqlite3_api->expanded_sql
+/* Version 3.18.0 and later */
+#define sqlite3_set_last_insert_rowid  sqlite3_api->set_last_insert_rowid
+/* Version 3.20.0 and later */
+#define sqlite3_prepare_v3             sqlite3_api->prepare_v3
+#define sqlite3_prepare16_v3           sqlite3_api->prepare16_v3
+#define sqlite3_bind_pointer           sqlite3_api->bind_pointer
+#define sqlite3_result_pointer         sqlite3_api->result_pointer
+#define sqlite3_value_pointer          sqlite3_api->value_pointer
 #endif /* !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION) */
 
 #if !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION)
@@ -539,4 +576,8 @@ struct sqlite3_api_routines {
 # define SQLITE_EXTENSION_INIT3     /*no-op*/
 #endif
 
-#endif /* _SQLITE3EXT_H_ */
+#endif /* SQLITE3EXT_H */
+#else // USE_LIBSQLITE3
+ // If users really want to link against the system sqlite3 we
+// need to make this file a noop.
+ #endif

vendor/github.com/mattn/go-sqlite3/tool/upgrade.go

@@ -0,0 +1,111 @@
+// +build ignore
+
+package main
+
+import (
+	"archive/zip"
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+
+	"github.com/PuerkitoBio/goquery"
+)
+
+func main() {
+	site := "https://www.sqlite.org/download.html"
+	fmt.Printf("scraping %v\n", site)
+	doc, err := goquery.NewDocument(site)
+	if err != nil {
+		log.Fatal(err)
+	}
+	var url string
+	doc.Find("a").Each(func(_ int, s *goquery.Selection) {
+		if url == "" && strings.HasPrefix(s.Text(), "sqlite-amalgamation-") {
+			url = "https://www.sqlite.org/2017/" + s.Text()
+		}
+	})
+	if url == "" {
+		return
+	}
+	fmt.Printf("downloading %v\n", url)
+	resp, err := http.Get(url)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	b, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		resp.Body.Close()
+		log.Fatal(err)
+	}
+
+	fmt.Printf("extracting %v\n", path.Base(url))
+	r, err := zip.NewReader(bytes.NewReader(b), resp.ContentLength)
+	if err != nil {
+		resp.Body.Close()
+		log.Fatal(err)
+	}
+	resp.Body.Close()
+
+	for _, zf := range r.File {
+		var f *os.File
+		switch path.Base(zf.Name) {
+		case "sqlite3.c":
+			f, err = os.Create("sqlite3-binding.c")
+		case "sqlite3.h":
+			f, err = os.Create("sqlite3-binding.h")
+		case "sqlite3ext.h":
+			f, err = os.Create("sqlite3ext.h")
+		default:
+			continue
+		}
+		if err != nil {
+			log.Fatal(err)
+		}
+		zr, err := zf.Open()
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		_, err = io.WriteString(f, "#ifndef USE_LIBSQLITE3\n")
+		if err != nil {
+			zr.Close()
+			f.Close()
+			log.Fatal(err)
+		}
+		scanner := bufio.NewScanner(zr)
+		for scanner.Scan() {
+			text := scanner.Text()
+			if text == `#include "sqlite3.h"` {
+				text = `#include "sqlite3-binding.h"`
+			}
+			_, err = fmt.Fprintln(f, text)
+			if err != nil {
+				break
+			}
+		}
+		err = scanner.Err()
+		if err != nil {
+			zr.Close()
+			f.Close()
+			log.Fatal(err)
+		}
+		_, err = io.WriteString(f, "#else // USE_LIBSQLITE3\n // If users really want to link against the system sqlite3 we\n// need to make this file a noop.\n #endif")
+		if err != nil {
+			zr.Close()
+			f.Close()
+			log.Fatal(err)
+		}
+		zr.Close()
+		f.Close()
+		fmt.Printf("extracted %v\n", filepath.Base(f.Name()))
+	}
+}