a lot of work on database schema and migration setup, postgres now works, every integration test passes for all database types, only token table left to do

pkg/services/sqlstore/sqlutil/sqlutil.go

@@ -0,0 +1,47 @@
+package sqlutil
+
+import (
+	"fmt"
+
+	"github.com/go-xorm/xorm"
+)
+
+type TestDB struct {
+	DriverName string
+	ConnStr    string
+}
+
+var TestDB_Sqlite3 = TestDB{DriverName: "sqlite3", ConnStr: ":memory:"}
+var TestDB_Mysql = TestDB{DriverName: "mysql", ConnStr: "grafana:password@tcp(localhost:3306)/grafana_tests?charset=utf8"}
+var TestDB_Postgres = TestDB{DriverName: "postgres", ConnStr: "user=grafanatest password=grafanatest host=localhost port=5432 dbname=grafanatest sslmode=disable"}
+
+func CleanDB(x *xorm.Engine) {
+	if x.DriverName() == "postgres" {
+		sess := x.NewSession()
+		defer sess.Close()
+
+		if _, err := sess.Exec("DROP SCHEMA public CASCADE;"); err != nil {
+			panic("Failed to drop schema public")
+		}
+
+		if _, err := sess.Exec("CREATE SCHEMA public;"); err != nil {
+			panic("Failed to create schema public")
+		}
+	} else if x.DriverName() == "mysql" {
+		tables, _ := x.DBMetas()
+		sess := x.NewSession()
+		defer sess.Close()
+
+		for _, table := range tables {
+			if _, err := sess.Exec("set foreign_key_checks = 0"); err != nil {
+				panic("failed to disable foreign key checks")
+			}
+			if _, err := sess.Exec("drop table " + table.Name + " ;"); err != nil {
+				panic(fmt.Sprintf("failed to delete table: %v, err: %v", table.Name, err))
+			}
+			if _, err := sess.Exec("set foreign_key_checks = 1"); err != nil {
+				panic("failed to disable foreign key checks")
+			}
+		}
+	}
+}