Worked on database agnostic table creation for db migrations

pkg/services/sqlstore/migrations/sqlite_dialect.go

@@ -0,0 +1,57 @@
+package migrations
+
+import "github.com/go-xorm/core"
+
+type Sqlite3 struct {
+	BaseDialect
+}
+
+func NewSqlite3Dialect() *Sqlite3 {
+	d := Sqlite3{}
+	d.BaseDialect.dialect = &d
+	d.BaseDialect.driverName = SQLITE
+	return &d
+}
+
+func (db *Sqlite3) Quote(name string) string {
+	return "`" + name + "`"
+}
+
+func (db *Sqlite3) QuoteStr() string {
+	return "`"
+}
+
+func (db *Sqlite3) AutoIncrStr() string {
+	return "AUTOINCREMENT"
+}
+
+func (db *Sqlite3) SqlType(c *Column) string {
+	switch c.Type {
+	case DB_Date, DB_DateTime, DB_TimeStamp, DB_Time:
+		return DB_DateTime
+	case DB_TimeStampz:
+		return DB_Text
+	case DB_Char, DB_Varchar, DB_NVarchar, DB_TinyText, DB_Text, DB_MediumText, DB_LongText:
+		return core.Text
+	case DB_Bit, DB_TinyInt, DB_SmallInt, DB_MediumInt, DB_Int, DB_Integer, DB_BigInt, DB_Bool:
+		return DB_Integer
+	case DB_Float, DB_Double, DB_Real:
+		return DB_Real
+	case DB_Decimal, DB_Numeric:
+		return DB_Numeric
+	case DB_TinyBlob, DB_Blob, DB_MediumBlob, DB_LongBlob, DB_Bytea, DB_Binary, DB_VarBinary:
+		return DB_Blob
+	case DB_Serial, DB_BigSerial:
+		c.IsPrimaryKey = true
+		c.IsAutoIncrement = true
+		c.Nullable = false
+		return core.Integer
+	default:
+		return c.Type
+	}
+}
+
+func (db *Sqlite3) TableCheckSql(tableName string) (string, []interface{}) {
+	args := []interface{}{tableName}
+	return "SELECT name FROM sqlite_master WHERE type='table' and name = ?", args
+}