diff --git a/engine.go b/engine.go
index 5e8d0af9..3fdbfcc3 100644
--- a/engine.go
+++ b/engine.go
@@ -1242,7 +1242,6 @@ func (engine *Engine) Sync(beans ...interface{}) error {
 					return err
 				}
 				if index.Type == core.UniqueType {
-					//isExist, err := session.isIndexExist(table.Name, name, true)
 					isExist, err := session.isIndexExist2(tableName, index.Cols, true)
 					if err != nil {
 						return err
@@ -1292,23 +1291,6 @@ func (engine *Engine) Sync2(beans ...interface{}) error {
 	return s.Sync2(beans...)
 }
 
-// Drop all mapped table
-func (engine *Engine) dropAll() error {
-	session := engine.NewSession()
-	defer session.Close()
-
-	err := session.Begin()
-	if err != nil {
-		return err
-	}
-	err = session.dropAll()
-	if err != nil {
-		session.Rollback()
-		return err
-	}
-	return session.Commit()
-}
-
 // CreateTables create tabls according bean
 func (engine *Engine) CreateTables(beans ...interface{}) error {
 	session := engine.NewSession()
@@ -1349,10 +1331,11 @@ func (engine *Engine) DropTables(beans ...interface{}) error {
 	return session.Commit()
 }
 
-func (engine *Engine) createAll() error {
+// DropIndexes drop indexes of a table
+func (engine *Engine) DropIndexes(bean interface{}) error {
 	session := engine.NewSession()
 	defer session.Close()
-	return session.createAll()
+	return session.DropIndexes(bean)
 }
 
 // Exec raw sql
diff --git a/session_schema.go b/session_schema.go
index 19c0cbf5..215efb85 100644
--- a/session_schema.go
+++ b/session_schema.go
@@ -89,24 +89,6 @@ func (session *Session) createOneTable() error {
 	return err
 }
 
-// to be deleted
-func (session *Session) createAll() error {
-	if session.IsAutoClose {
-		defer session.Close()
-	}
-
-	for _, table := range session.Engine.Tables {
-		session.Statement.RefTable = table
-		session.Statement.tableName = table.Name
-		err := session.createOneTable()
-		session.resetStatement()
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
 // DropIndexes drop indexes
 func (session *Session) DropIndexes(bean interface{}) error {
 	v := rValue(bean)
@@ -208,22 +190,6 @@ func (session *Session) isTableEmpty(tableName string) (bool, error) {
 	return total == 0, nil
 }
 
-func (session *Session) isIndexExist(tableName, idxName string, unique bool) (bool, error) {
-	defer session.resetStatement()
-	if session.IsAutoClose {
-		defer session.Close()
-	}
-	var idx string
-	if unique {
-		idx = uniqueName(tableName, idxName)
-	} else {
-		idx = indexName(tableName, idxName)
-	}
-	sqlStr, args := session.Engine.dialect.IndexCheckSql(tableName, idx)
-	results, err := session.query(sqlStr, args...)
-	return len(results) > 0, err
-}
-
 // find if index is exist according cols
 func (session *Session) isIndexExist2(tableName string, cols []string, unique bool) (bool, error) {
 	defer session.resetStatement()
@@ -282,25 +248,6 @@ func (session *Session) addUnique(tableName, uqeName string) error {
 	return err
 }
 
-// To be deleted
-func (session *Session) dropAll() error {
-	defer session.resetStatement()
-	if session.IsAutoClose {
-		defer session.Close()
-	}
-
-	for _, table := range session.Engine.Tables {
-		session.Statement.Init()
-		session.Statement.RefTable = table
-		sqlStr := session.Engine.Dialect().DropTableSql(session.Statement.TableName())
-		_, err := session.exec(sqlStr)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
 // Sync2 synchronize structs to database tables
 func (session *Session) Sync2(beans ...interface{}) error {
 	engine := session.Engine
diff --git a/session_schema_test.go b/session_schema_test.go
index 2354261b..4d8a4d5a 100644
--- a/session_schema_test.go
+++ b/session_schema_test.go
@@ -64,6 +64,46 @@ func TestCreateMultiTables(t *testing.T) {
 	assert.NoError(t, session.Commit())
 }
 
+type SyncTable1 struct {
+	Id   int64
+	Name string
+	Dev  int `xorm:"index"`
+}
+
+type SyncTable2 struct {
+	Id     int64
+	Name   string `xorm:"unique"`
+	Number string `xorm:"index"`
+	Dev    int
+	Age    int
+}
+
+func (SyncTable2) TableName() string {
+	return "sync_table1"
+}
+
+func TestSyncTable(t *testing.T) {
+	assert.NoError(t, prepareEngine())
+
+	assert.NoError(t, testEngine.Sync2(new(SyncTable1)))
+
+	assert.NoError(t, testEngine.Sync2(new(SyncTable2)))
+}
+
+func TestIsTableExist(t *testing.T) {
+	assert.NoError(t, prepareEngine())
+
+	exist, err := testEngine.IsTableExist(new(CustomTableName))
+	assert.NoError(t, err)
+	assert.False(t, exist)
+
+	assert.NoError(t, testEngine.CreateTables(new(CustomTableName)))
+
+	exist, err = testEngine.IsTableExist(new(CustomTableName))
+	assert.NoError(t, err)
+	assert.True(t, exist)
+}
+
 func TestIsTableEmpty(t *testing.T) {
 	assert.NoError(t, prepareEngine())
 
@@ -146,6 +186,8 @@ func TestIndexAndUnique(t *testing.T) {
 	assert.NoError(t, testEngine.CreateIndexes(&IndexOrUnique{}))
 
 	assert.NoError(t, testEngine.CreateUniques(&IndexOrUnique{}))
+
+	assert.NoError(t, testEngine.DropIndexes(&IndexOrUnique{}))
 }
 
 func TestMetaInfo(t *testing.T) {