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/migrator/mysql_dialect.go

@@ -0,0 +1,75 @@
+package migrator
+
+import "strconv"
+
+type Mysql struct {
+	BaseDialect
+}
+
+func NewMysqlDialect() *Mysql {
+	d := Mysql{}
+	d.BaseDialect.dialect = &d
+	d.BaseDialect.driverName = MYSQL
+	return &d
+}
+
+func (db *Mysql) Quote(name string) string {
+	return "`" + name + "`"
+}
+
+func (db *Mysql) QuoteStr() string {
+	return "`"
+}
+
+func (db *Mysql) AutoIncrStr() string {
+	return "AUTO_INCREMENT"
+}
+
+func (db *Mysql) SqlType(c *Column) string {
+	var res string
+	switch c.Type {
+	case DB_Bool:
+		res = DB_TinyInt
+		c.Length = 1
+	case DB_Serial:
+		c.IsAutoIncrement = true
+		c.IsPrimaryKey = true
+		c.Nullable = false
+		res = DB_Int
+	case DB_BigSerial:
+		c.IsAutoIncrement = true
+		c.IsPrimaryKey = true
+		c.Nullable = false
+		res = DB_BigInt
+	case DB_Bytea:
+		res = DB_Blob
+	case DB_TimeStampz:
+		res = DB_Char
+		c.Length = 64
+	case DB_NVarchar:
+		res = DB_Varchar
+	default:
+		res = c.Type
+	}
+
+	var hasLen1 bool = (c.Length > 0)
+	var hasLen2 bool = (c.Length2 > 0)
+
+	if res == DB_BigInt && !hasLen1 && !hasLen2 {
+		c.Length = 20
+		hasLen1 = true
+	}
+
+	if hasLen2 {
+		res += "(" + strconv.Itoa(c.Length) + "," + strconv.Itoa(c.Length2) + ")"
+	} else if hasLen1 {
+		res += "(" + strconv.Itoa(c.Length) + ")"
+	}
+	return res
+}
+
+func (db *Mysql) TableCheckSql(tableName string) (string, []interface{}) {
+	args := []interface{}{"grafana", tableName}
+	sql := "SELECT `TABLE_NAME` from `INFORMATION_SCHEMA`.`TABLES` WHERE `TABLE_SCHEMA`=? and `TABLE_NAME`=?"
+	return sql, args
+}