orm add sqlite3 support, may be support postgres in next commit

 package orm
 
+var mysqlOperators = map[string]string{
+	"exact":     "= ?",
+	"iexact":    "LIKE ?",
+	"contains":  "LIKE BINARY ?",
+	"icontains": "LIKE ?",
+	// "regex":       "REGEXP BINARY ?",
+	// "iregex":      "REGEXP ?",
+	"gt":          "> ?",
+	"gte":         ">= ?",
+	"lt":          "< ?",
+	"lte":         "<= ?",
+	"startswith":  "LIKE BINARY ?",
+	"endswith":    "LIKE BINARY ?",
+	"istartswith": "LIKE ?",
+	"iendswith":   "LIKE ?",
+}
+
 type dbBaseMysql struct {
 	dbBase
 }
 
-func (d *dbBaseMysql) GetOperatorSql(mi *modelInfo, operator string, args []interface{}) (sql string, params []interface{}) {
-	return d.dbBase.GetOperatorSql(mi, operator, args)
+var _ dbBaser = new(dbBaseMysql)
+
+func (d *dbBaseMysql) OperatorSql(operator string) string {
+	return mysqlOperators[operator]
 }
 
 func newdbBaseMysql() dbBaser {

@@ -4,6 +4,12 @@ type dbBaseOracle struct {
 	dbBase
 }
 
+var _ dbBaser = new(dbBaseOracle)
+
+func (d *dbBase) OperatorSql(operator string) string {
+	return ""
+}
+
 func newdbBaseOracle() dbBaser {
 	b := new(dbBaseOracle)
 	b.ins = b

 package orm
 
+import (
+	"strconv"
+)
+
+var postgresOperators = map[string]string{
+	"exact":       "= ?",
+	"iexact":      "= UPPER(?)",
+	"contains":    "LIKE ?",
+	"icontains":   "LIKE UPPER(?)",
+	"gt":          "> ?",
+	"gte":         ">= ?",
+	"lt":          "< ?",
+	"lte":         "<= ?",
+	"startswith":  "LIKE ?",
+	"endswith":    "LIKE ?",
+	"istartswith": "LIKE UPPER(?)",
+	"iendswith":   "LIKE UPPER(?)",
+}
+
 type dbBasePostgres struct {
 	dbBase
 }
 
+var _ dbBaser = new(dbBasePostgres)
+
+func (d *dbBasePostgres) OperatorSql(operator string) string {
+	return postgresOperators[operator]
+}
+
+func (d *dbBasePostgres) TableQuote() string {
+	return `"`
+}
+
+func (d *dbBasePostgres) ReplaceMarks(query *string) {
+	q := *query
+	num := 0
+	for _, c := range q {
+		if c == '?' {
+			num += 1
+		}
+	}
+	if num == 0 {
+		return
+	}
+	data := make([]byte, 0, len(q)+num)
+	num = 1
+	for i := 0; i < len(q); i++ {
+		c := q[i]
+		if c == '?' {
+			data = append(data, '$')
+			data = append(data, []byte(strconv.Itoa(num))...)
+			num += 1
+		} else {
+			data = append(data, c)
+		}
+	}
+	*query = string(data)
+}
+
+// func (d *dbBasePostgres)
+
 func newdbBasePostgres() dbBaser {
 	b := new(dbBasePostgres)
 	b.ins = b

 package orm
 
+var sqliteOperators = map[string]string{
+	"exact":       "= ?",
+	"iexact":      "LIKE ? ESCAPE '\\'",
+	"contains":    "LIKE ? ESCAPE '\\'",
+	"icontains":   "LIKE ? ESCAPE '\\'",
+	"gt":          "> ?",
+	"gte":         ">= ?",
+	"lt":          "< ?",
+	"lte":         "<= ?",
+	"startswith":  "LIKE ? ESCAPE '\\'",
+	"endswith":    "LIKE ? ESCAPE '\\'",
+	"istartswith": "LIKE ? ESCAPE '\\'",
+	"iendswith":   "LIKE ? ESCAPE '\\'",
+}
+
 type dbBaseSqlite struct {
 	dbBase
 }
 
+var _ dbBaser = new(dbBaseSqlite)
+
+func (d *dbBaseSqlite) OperatorSql(operator string) string {
+	return sqliteOperators[operator]
+}
+
+func (d *dbBaseSqlite) SupportUpdateJoin() bool {
+	return false
+}
+
+func (d *dbBaseSqlite) MaxLimit() uint64 {
+	return 9223372036854775807
+}
+
 func newdbBaseSqlite() dbBaser {
 	b := new(dbBaseSqlite)
 	b.ins = b

+package orm
+
+import (
+	"fmt"
+	"strings"
+)
+
+type dbTable struct {
+	id    int
+	index string
+	name  string
+	names []string
+	sel   bool
+	inner bool
+	mi    *modelInfo
+	fi    *fieldInfo
+	jtl   *dbTable
+}
+
+type dbTables struct {
+	tablesM map[string]*dbTable
+	tables  []*dbTable
+	mi      *modelInfo
+	base    dbBaser
+}
+
+func (t *dbTables) set(names []string, mi *modelInfo, fi *fieldInfo, inner bool) *dbTable {
+	name := strings.Join(names, ExprSep)
+	if j, ok := t.tablesM[name]; ok {
+		j.name = name
+		j.mi = mi
+		j.fi = fi
+		j.inner = inner
+	} else {
+		i := len(t.tables) + 1
+		jt := &dbTable{i, fmt.Sprintf("T%d", i), name, names, false, inner, mi, fi, nil}
+		t.tablesM[name] = jt
+		t.tables = append(t.tables, jt)
+	}
+	return t.tablesM[name]
+}
+
+func (t *dbTables) add(names []string, mi *modelInfo, fi *fieldInfo, inner bool) (*dbTable, bool) {
+	name := strings.Join(names, ExprSep)
+	if _, ok := t.tablesM[name]; ok == false {
+		i := len(t.tables) + 1
+		jt := &dbTable{i, fmt.Sprintf("T%d", i), name, names, false, inner, mi, fi, nil}
+		t.tablesM[name] = jt
+		t.tables = append(t.tables, jt)
+		return jt, true
+	}
+	return t.tablesM[name], false
+}
+
+func (t *dbTables) get(name string) (*dbTable, bool) {
+	j, ok := t.tablesM[name]
+	return j, ok
+}
+
+func (t *dbTables) loopDepth(depth int, prefix string, fi *fieldInfo, related []string) []string {
+	if depth < 0 || fi.fieldType == RelManyToMany {
+		return related
+	}
+
+	if prefix == "" {
+		prefix = fi.name
+	} else {
+		prefix = prefix + ExprSep + fi.name
+	}
+	related = append(related, prefix)
+
+	depth--
+	for _, fi := range fi.relModelInfo.fields.fieldsRel {
+		related = t.loopDepth(depth, prefix, fi, related)
+	}
+
+	return related
+}
+
+func (t *dbTables) parseRelated(rels []string, depth int) {
+
+	relsNum := len(rels)
+	related := make([]string, relsNum)
+	copy(related, rels)
+
+	relDepth := depth
+
+	if relsNum != 0 {
+		relDepth = 0
+	}
+
+	relDepth--
+	for _, fi := range t.mi.fields.fieldsRel {
+		related = t.loopDepth(relDepth, "", fi, related)
+	}
+
+	for i, s := range related {
+		var (
+			exs    = strings.Split(s, ExprSep)
+			names  = make([]string, 0, len(exs))
+			mmi    = t.mi
+			cansel = true
+			jtl    *dbTable
+		)
+		for _, ex := range exs {
+			if fi, ok := mmi.fields.GetByAny(ex); ok && fi.rel && fi.fieldType != RelManyToMany {
+				names = append(names, fi.name)
+				mmi = fi.relModelInfo
+
+				jt := t.set(names, mmi, fi, fi.null == false)
+				jt.jtl = jtl
+
+				if fi.reverse {
+					cansel = false
+				}
+
+				if cansel {
+					jt.sel = depth > 0
+
+					if i < relsNum {
+						jt.sel = true
+					}
+				}
+
+				jtl = jt
+
+			} else {
+				panic(fmt.Sprintf("unknown model/table name `%s`", ex))
+			}
+		}
+	}
+}
+
+func (t *dbTables) getJoinSql() (join string) {
+	Q := t.base.TableQuote()
+
+	for _, jt := range t.tables {
+		if jt.inner {
+			join += "INNER JOIN "
+		} else {
+			join += "LEFT OUTER JOIN "
+		}
+		var (
+			table  string
+			t1, t2 string
+			c1, c2 string
+		)
+		t1 = "T0"
+		if jt.jtl != nil {
+			t1 = jt.jtl.index
+		}
+		t2 = jt.index
+		table = jt.mi.table
+
+		switch {
+		case jt.fi.fieldType == RelManyToMany || jt.fi.reverse && jt.fi.reverseFieldInfo.fieldType == RelManyToMany:
+			c1 = jt.fi.mi.fields.pk.column
+			for _, ffi := range jt.mi.fields.fieldsRel {
+				if jt.fi.mi == ffi.relModelInfo {
+					c2 = ffi.column
+					break
+				}
+			}
+		default:
+			c1 = jt.fi.column
+			c2 = jt.fi.relModelInfo.fields.pk.column
+
+			if jt.fi.reverse {
+				c1 = jt.mi.fields.pk.column
+				c2 = jt.fi.reverseFieldInfo.column
+			}
+		}
+
+		join += fmt.Sprintf("%s%s%s %s ON %s.%s%s%s = %s.%s%s%s ", Q, table, Q, t2,
+			t2, Q, c2, Q, t1, Q, c1, Q)
+	}
+	return
+}
+
+func (d *dbTables) parseExprs(mi *modelInfo, exprs []string) (index, column, name string, info *fieldInfo, success bool) {
+	var (
+		ffi *fieldInfo
+		jtl *dbTable
+		mmi = mi
+	)
+
+	num := len(exprs) - 1
+	names := make([]string, 0)
+
+	for i, ex := range exprs {
+		exist := false
+
+	check:
+		fi, ok := mmi.fields.GetByAny(ex)
+
+		if ok {
+
+			if num != i {
+				names = append(names, fi.name)
+
+				switch {
+				case fi.rel:
+					mmi = fi.relModelInfo
+					if fi.fieldType == RelManyToMany {
+						mmi = fi.relThroughModelInfo
+					}
+				case fi.reverse:
+					mmi = fi.reverseFieldInfo.mi
+					if fi.reverseFieldInfo.fieldType == RelManyToMany {
+						mmi = fi.reverseFieldInfo.relThroughModelInfo
+					}
+				default:
+					return
+				}
+
+				jt, _ := d.add(names, mmi, fi, fi.null == false)
+				jt.jtl = jtl
+				jtl = jt
+
+				if fi.rel && fi.fieldType == RelManyToMany {
+					ex = fi.relModelInfo.name
+					goto check
+				}
+
+				if fi.reverse && fi.reverseFieldInfo.fieldType == RelManyToMany {
+					ex = fi.reverseFieldInfo.mi.name
+					goto check
+				}
+
+				exist = true
+
+			} else {
+
+				if ffi == nil {
+					index = "T0"
+				} else {
+					index = jtl.index
+				}
+				column = fi.column
+				info = fi
+				if jtl != nil {
+					name = jtl.name + ExprSep + fi.name
+				} else {
+					name = fi.name
+				}
+
+				switch fi.fieldType {
+				case RelManyToMany, RelReverseMany:
+				default:
+					exist = true
+				}
+			}
+
+			ffi = fi
+		}
+
+		if exist == false {
+			index = ""
+			column = ""
+			name = ""
+			success = false
+			return
+		}
+	}
+
+	success = index != "" && column != ""
+	return
+}
+
+func (d *dbTables) getCondSql(cond *Condition, sub bool) (where string, params []interface{}) {
+	if cond == nil || cond.IsEmpty() {
+		return
+	}
+
+	Q := d.base.TableQuote()
+
+	mi := d.mi
+
+	// outFor:
+	for i, p := range cond.params {
+		if i > 0 {
+			if p.isOr {
+				where += "OR "
+			} else {
+				where += "AND "
+			}
+		}
+		if p.isNot {
+			where += "NOT "
+		}
+		if p.isCond {
+			w, ps := d.getCondSql(p.cond, true)
+			if w != "" {
+				w = fmt.Sprintf("( %s) ", w)
+			}
+			where += w
+			params = append(params, ps...)
+		} else {
+			exprs := p.exprs
+
+			num := len(exprs) - 1
+			operator := ""
+			if operators[exprs[num]] {
+				operator = exprs[num]
+				exprs = exprs[:num]
+			}
+
+			index, column, _, _, suc := d.parseExprs(mi, exprs)
+			if suc == false {
+				panic(fmt.Errorf("unknown field/column name `%s`", strings.Join(p.exprs, ExprSep)))
+			}
+
+			if operator == "" {
+				operator = "exact"
+			}
+
+			operSql, args := d.base.GenerateOperatorSql(mi, operator, p.args)
+
+			where += fmt.Sprintf("%s.%s%s%s %s ", index, Q, column, Q, operSql)
+			params = append(params, args...)
+
+		}
+	}
+
+	if sub == false && where != "" {
+		where = "WHERE " + where
+	}
+
+	return
+}
+
+func (d *dbTables) getOrderSql(orders []string) (orderSql string) {
+	if len(orders) == 0 {
+		return
+	}
+
+	Q := d.base.TableQuote()
+
+	orderSqls := make([]string, 0, len(orders))
+	for _, order := range orders {
+		asc := "ASC"
+		if order[0] == '-' {
+			asc = "DESC"
+			order = order[1:]
+		}
+		exprs := strings.Split(order, ExprSep)
+
+		index, column, _, _, suc := d.parseExprs(d.mi, exprs)
+		if suc == false {
+			panic(fmt.Errorf("unknown field/column name `%s`", strings.Join(exprs, ExprSep)))
+		}
+
+		orderSqls = append(orderSqls, fmt.Sprintf("%s.%s%s%s %s", index, Q, column, Q, asc))
+	}
+
+	orderSql = fmt.Sprintf("ORDER BY %s ", strings.Join(orderSqls, ", "))
+	return
+}
+
+func (d *dbTables) getLimitSql(mi *modelInfo, offset int64, limit int) (limits string) {
+	if limit == 0 {
+		limit = DefaultRowsLimit
+	}
+	if limit < 0 {
+		// no limit
+		if offset > 0 {
+			maxLimit := d.base.MaxLimit()
+			limits = fmt.Sprintf("LIMIT %d OFFSET %d", maxLimit, offset)
+		}
+	} else if offset <= 0 {
+		limits = fmt.Sprintf("LIMIT %d", limit)
+	} else {
+		limits = fmt.Sprintf("LIMIT %d OFFSET %d", limit, offset)
+	}
+	return
+}
+
+func newDbTables(mi *modelInfo, base dbBaser) *dbTables {
+	tables := &dbTables{}
+	tables.tablesM = make(map[string]*dbTable)
+	tables.mi = mi
+	tables.base = base
+	return tables
+}

@@ -79,7 +79,7 @@ func newModelInfo(val reflect.Value) (info *modelInfo) {
 func newM2MModelInfo(m1, m2 *modelInfo) (info *modelInfo) {
 	info = new(modelInfo)
 	info.fields = newFields()
-	info.table = m1.table + "_" + m2.table + "_rel"
+	info.table = m1.table + "_" + m2.table + "s"
 	info.name = camelString(info.table)
 	info.fullName = m1.pkg + "." + info.name
 

@@ -3,10 +3,11 @@ package orm
 import (
 	"fmt"
 	"os"
+	"strings"
 	"time"
 
-	_ "github.com/bmizerany/pq"
 	_ "github.com/go-sql-driver/mysql"
+	_ "github.com/lib/pq"
 	_ "github.com/mattn/go-sqlite3"
 )
 
@@ -95,8 +96,178 @@ var DBARGS = struct {
 	os.Getenv("ORM_DEBUG"),
 }
 
+var (
+	IsMysql    = DBARGS.Driver == "mysql"
+	IsSqlite   = DBARGS.Driver == "sqlite3"
+	IsPostgres = DBARGS.Driver == "postgres"
+)
+
 var dORM Ormer
 
+var initSQLs = map[string]string{
+	"mysql": "DROP TABLE IF EXISTS `user_profile`;\n" +
+		"DROP TABLE IF EXISTS `user`;\n" +
+		"DROP TABLE IF EXISTS `post`;\n" +
+		"DROP TABLE IF EXISTS `tag`;\n" +
+		"DROP TABLE IF EXISTS `post_tags`;\n" +
+		"DROP TABLE IF EXISTS `comment`;\n" +
+		"CREATE TABLE `user_profile` (\n" +
+		"    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,\n" +
+		"    `age` smallint NOT NULL,\n" +
+		"    `money` double precision NOT NULL\n" +
+		") ENGINE=INNODB;\n" +
+		"CREATE TABLE `user` (\n" +
+		"    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,\n" +
+		"    `user_name` varchar(30) NOT NULL UNIQUE,\n" +
+		"    `email` varchar(100) NOT NULL,\n" +
+		"    `password` varchar(100) NOT NULL,\n" +
+		"    `status` smallint NOT NULL,\n" +
+		"    `is_staff` bool NOT NULL,\n" +
+		"    `is_active` bool NOT NULL,\n" +
+		"    `created` date NOT NULL,\n" +
+		"    `updated` datetime NOT NULL,\n" +
+		"    `profile_id` integer\n" +
+		") ENGINE=INNODB;\n" +
+		"CREATE TABLE `post` (\n" +
+		"    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,\n" +
+		"    `user_id` integer NOT NULL,\n" +
+		"    `title` varchar(60) NOT NULL,\n" +
+		"    `content` longtext NOT NULL,\n" +
+		"    `created` datetime NOT NULL,\n" +
+		"    `updated` datetime NOT NULL\n" +
+		") ENGINE=INNODB;\n" +
+		"CREATE TABLE `tag` (\n" +
+		"    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,\n" +
+		"    `name` varchar(30) NOT NULL\n" +
+		") ENGINE=INNODB;\n" +
+		"CREATE TABLE `post_tags` (\n" +
+		"    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,\n" +
+		"    `post_id` integer NOT NULL,\n" +
+		"    `tag_id` integer NOT NULL,\n" +
+		"    UNIQUE (`post_id`, `tag_id`)\n" +
+		") ENGINE=INNODB;\n" +
+		"CREATE TABLE `comment` (\n" +
+		"    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,\n" +
+		"    `post_id` integer NOT NULL,\n" +
+		"    `content` longtext NOT NULL,\n" +
+		"    `parent_id` integer,\n" +
+		"    `created` datetime NOT NULL\n" +
+		") ENGINE=INNODB;\n" +
+		"CREATE INDEX `user_141c6eec` ON `user` (`profile_id`);\n" +
+		"CREATE INDEX `post_fbfc09f1` ON `post` (`user_id`);\n" +
+		"CREATE INDEX `comment_699ae8ca` ON `comment` (`post_id`);\n" +
+		"CREATE INDEX `comment_63f17a16` ON `comment` (`parent_id`);",
+
+	"sqlite3": `
+DROP TABLE IF EXISTS "user_profile";
+DROP TABLE IF EXISTS "user";
+DROP TABLE IF EXISTS "post";
+DROP TABLE IF EXISTS "tag";
+DROP TABLE IF EXISTS "post_tags";
+DROP TABLE IF EXISTS "comment";
+CREATE TABLE "user_profile" (
+    "id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "age" smallint NOT NULL,
+    "money" real NOT NULL
+);
+CREATE TABLE "user" (
+    "id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "user_name" varchar(30) NOT NULL UNIQUE,
+    "email" varchar(100) NOT NULL,
+    "password" varchar(100) NOT NULL,
+    "status" smallint NOT NULL,
+    "is_staff" bool NOT NULL,
+    "is_active" bool NOT NULL,
+    "created" date NOT NULL,
+    "updated" datetime NOT NULL,
+    "profile_id" integer
+);
+CREATE TABLE "post" (
+    "id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "user_id" integer NOT NULL,
+    "title" varchar(60) NOT NULL,
+    "content" text NOT NULL,
+    "created" datetime NOT NULL,
+    "updated" datetime NOT NULL
+);
+CREATE TABLE "tag" (
+    "id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "name" varchar(30) NOT NULL
+);
+CREATE TABLE "post_tags" (
+    "id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "post_id" integer NOT NULL,
+    "tag_id" integer NOT NULL,
+    UNIQUE ("post_id", "tag_id")
+);
+CREATE TABLE "comment" (
+    "id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "post_id" integer NOT NULL,
+    "content" text NOT NULL,
+    "parent_id" integer,
+    "created" datetime NOT NULL
+);
+CREATE INDEX "user_141c6eec" ON "user" ("profile_id");
+CREATE INDEX "post_fbfc09f1" ON "post" ("user_id");
+CREATE INDEX "comment_699ae8ca" ON "comment" ("post_id");
+CREATE INDEX "comment_63f17a16" ON "comment" ("parent_id");
+`,
+
+	"postgres": `
+DROP TABLE IF EXISTS "user_profile";
+DROP TABLE IF EXISTS "user";
+DROP TABLE IF EXISTS "post";
+DROP TABLE IF EXISTS "tag";
+DROP TABLE IF EXISTS "post_tags";
+DROP TABLE IF EXISTS "comment";
+CREATE TABLE "user_profile" (
+    "id" serial NOT NULL PRIMARY KEY,
+    "age" smallint NOT NULL,
+    "money" double precision NOT NULL
+);
+CREATE TABLE "user" (
+    "id" serial NOT NULL PRIMARY KEY,
+    "user_name" varchar(30) NOT NULL UNIQUE,
+    "email" varchar(100) NOT NULL,
+    "password" varchar(100) NOT NULL,
+    "status" smallint NOT NULL,
+    "is_staff" boolean NOT NULL,
+    "is_active" boolean NOT NULL,
+    "created" date NOT NULL,
+    "updated" timestamp with time zone NOT NULL,
+    "profile_id" integer
+);
+CREATE TABLE "post" (
+    "id" serial NOT NULL PRIMARY KEY,
+    "user_id" integer NOT NULL,
+    "title" varchar(60) NOT NULL,
+    "content" text NOT NULL,
+    "created" timestamp with time zone NOT NULL,
+    "updated" timestamp with time zone NOT NULL
+);
+CREATE TABLE "tag" (
+    "id" serial NOT NULL PRIMARY KEY,
+    "name" varchar(30) NOT NULL
+);
+CREATE TABLE "post_tags" (
+    "id" serial NOT NULL PRIMARY KEY,
+    "post_id" integer NOT NULL,
+    "tag_id" integer NOT NULL,
+    UNIQUE ("post_id", "tag_id")
+);
+CREATE TABLE "comment" (
+    "id" serial NOT NULL PRIMARY KEY,
+    "post_id" integer NOT NULL,
+    "content" text NOT NULL,
+    "parent_id" integer,
+    "created" timestamp with time zone NOT NULL
+);
+CREATE INDEX "user_profile_id" ON "user" ("profile_id");
+CREATE INDEX "post_user_id" ON "post" ("user_id");
+CREATE INDEX "comment_post_id" ON "comment" ("post_id");
+CREATE INDEX "comment_parent_id" ON "comment" ("parent_id");
+`}
+
 func init() {
 	RegisterModel(new(User))
 	RegisterModel(new(Profile))
@@ -114,7 +285,7 @@ Default DB Drivers.
   driver: url
    mysql: https://github.com/go-sql-driver/mysql
  sqlite3: https://github.com/mattn/go-sqlite3
-postgres: https://github.com/bmizerany/pq
+postgres: https://github.com/lib/pq
 
 eg: mysql
 ORM_DRIVER=mysql ORM_SOURCE="root:root@/my_db?charset=utf8" go test github.com/astaxie/beego/orm
@@ -126,20 +297,16 @@ ORM_DRIVER=mysql ORM_SOURCE="root:root@/my_db?charset=utf8" go test github.com/a
 
 	BootStrap()
 
-	truncateTables()
-
 	dORM = NewOrm()
-}
 
-func truncateTables() {
-	logs := "truncate tables for test\n"
-	o := NewOrm()
-	for _, m := range modelCache.allOrdered() {
-		query := fmt.Sprintf("truncate table `%s`", m.table)
-		_, err := o.Raw(query).Exec()
-		logs += query + "\n"
+	queries := strings.Split(initSQLs[DBARGS.Driver], ";")
+
+	for _, query := range queries {
+		if strings.TrimSpace(query) == "" {
+			continue
+		}
+		_, err := dORM.Raw(query).Exec()
 		if err != nil {
-			fmt.Println(logs)
 			fmt.Println(err)
 			os.Exit(2)
 		}

@@ -135,7 +135,7 @@ func (d *dbQueryLog) Commit() error {
 
 func (d *dbQueryLog) Rollback() error {
 	a := time.Now()
-	err := d.db.(txEnder).Commit()
+	err := d.db.(txEnder).Rollback()
 	debugLogQueies(d.alias, "tx.Rollback", "ROLLBACK", a, err)
 	return err
 }

@@ -6,39 +6,17 @@ import (
 	"reflect"
 )
 
-func getResult(res sql.Result) (int64, error) {
-	if num, err := res.LastInsertId(); err != nil {
-		return 0, err
-	} else {
-		if num > 0 {
-			return num, nil
-		}
-	}
-	if num, err := res.RowsAffected(); err != nil {
-		return num, err
-	} else {
-		if num > 0 {
-			return num, nil
-		}
-	}
-	return 0, nil
-}
-
 type rawPrepare struct {
 	rs     *rawSet
 	stmt   stmtQuerier
 	closed bool
 }
 
-func (o *rawPrepare) Exec(args ...interface{}) (int64, error) {
+func (o *rawPrepare) Exec(args ...interface{}) (sql.Result, error) {
 	if o.closed {
-		return 0, ErrStmtClosed
-	}
-	res, err := o.stmt.Exec(args...)
-	if err != nil {
-		return 0, err
+		return nil, ErrStmtClosed
 	}
-	return getResult(res)
+	return o.stmt.Exec(args...)
 }
 
 func (o *rawPrepare) Close() error {
@@ -74,12 +52,8 @@ func (o rawSet) SetArgs(args ...interface{}) RawSeter {
 	return &o
 }
 
-func (o *rawSet) Exec() (int64, error) {
-	res, err := o.orm.db.Exec(o.query, o.args...)
-	if err != nil {
-		return 0, err
-	}
-	return getResult(res)
+func (o *rawSet) Exec() (sql.Result, error) {
+	return o.orm.db.Exec(o.query, o.args...)
 }
 
 func (o *rawSet) QueryRow(...interface{}) error {

@@ -60,12 +60,12 @@ type QuerySeter interface {
 }
 
 type RawPreparer interface {
-	Exec(...interface{}) (int64, error)
+	Exec(...interface{}) (sql.Result, error)
 	Close() error
 }
 
 type RawSeter interface {
-	Exec() (int64, error)
+	Exec() (sql.Result, error)
 	QueryRow(...interface{}) error
 	QueryRows(...interface{}) (int64, error)
 	SetArgs(...interface{}) RawSeter
@@ -116,10 +116,15 @@ type dbBaser interface {
 	Update(dbQuerier, *modelInfo, reflect.Value) (int64, error)
 	Delete(dbQuerier, *modelInfo, reflect.Value) (int64, error)
 	ReadBatch(dbQuerier, *querySet, *modelInfo, *Condition, interface{}) (int64, error)
+	SupportUpdateJoin() bool
 	UpdateBatch(dbQuerier, *querySet, *modelInfo, *Condition, Params) (int64, error)
 	DeleteBatch(dbQuerier, *querySet, *modelInfo, *Condition) (int64, error)
 	Count(dbQuerier, *querySet, *modelInfo, *Condition) (int64, error)
-	GetOperatorSql(*modelInfo, string, []interface{}) (string, []interface{})
+	OperatorSql(string) string
+	GenerateOperatorSql(*modelInfo, string, []interface{}) (string, []interface{})
 	PrepareInsert(dbQuerier, *modelInfo) (stmtQuerier, string, error)
 	ReadValues(dbQuerier, *querySet, *modelInfo, *Condition, []string, interface{}) (int64, error)
+	MaxLimit() uint64
+	TableQuote() string
+	ReplaceMarks(*string)
 }