diff --git a/dialects/dialect.go b/dialects/dialect.go
index a336a087..283da150 100644
--- a/dialects/dialect.go
+++ b/dialects/dialect.go
@@ -171,7 +171,7 @@ func (db *Base) DropSequenceSQL(seqName string) (string, error) {
 }
 
 // DropTableSQL returns drop table SQL
-func (db *Base) DropTableSQL(tableName, autoincrCol string) (string, bool) {
+func (db *Base) DropTableSQL(tableName string) (string, bool) {
 	quote := db.dialect.Quoter().Quote
 	return fmt.Sprintf("DROP TABLE IF EXISTS %s", quote(tableName)), true
 }
diff --git a/dialects/mssql.go b/dialects/mssql.go
index 6244ce6d..cd19afb9 100644
--- a/dialects/mssql.go
+++ b/dialects/mssql.go
@@ -421,7 +421,7 @@ func (db *mssql) AutoIncrStr() string {
 	return "IDENTITY"
 }
 
-func (db *mssql) DropTableSQL(tableName, autoincrCol string) (string, bool) {
+func (db *mssql) DropTableSQL(tableName string) (string, bool) {
 	return fmt.Sprintf("IF EXISTS (SELECT * FROM sysobjects WHERE id = "+
 		"object_id(N'%s') and OBJECTPROPERTY(id, N'IsUserTable') = 1) "+
 		"DROP TABLE \"%s\"", tableName, tableName), true
diff --git a/dialects/oracle.go b/dialects/oracle.go
index 5137f6bd..6c1bdc79 100644
--- a/dialects/oracle.go
+++ b/dialects/oracle.go
@@ -615,7 +615,7 @@ func (db *oracle) IsReserved(name string) bool {
 	return ok
 }
 
-func (db *oracle) DropTableSQL(tableName, autoincrCol string) (string, bool) {
+func (db *oracle) DropTableSQL(tableName string) (string, bool) {
 	return fmt.Sprintf("DROP TABLE %s", db.quoter.Quote(tableName)), false
 }
 
diff --git a/dialects/postgres.go b/dialects/postgres.go
index 3fe71dcc..e810d803 100644
--- a/dialects/postgres.go
+++ b/dialects/postgres.go
@@ -947,12 +947,6 @@ func (db *postgres) SQLType(c *schemas.Column) string {
 	return res
 }
 
-func (db *postgres) Features() *DialectFeatures {
-	return &DialectFeatures{
-		AutoincrMode: IncrAutoincrMode,
-	}
-}
-
 func (db *postgres) ColumnTypeKind(t string) int {
 	switch strings.ToUpper(t) {
 	case "DATETIME", "TIMESTAMP":
diff --git a/dialects/sqlite3.go b/dialects/sqlite3.go
index 731b87f1..4ff9a39e 100644
--- a/dialects/sqlite3.go
+++ b/dialects/sqlite3.go
@@ -207,12 +207,6 @@ func (db *sqlite3) SetQuotePolicy(quotePolicy QuotePolicy) {
 	}
 }
 
-func (db *sqlite3) Features() *DialectFeatures {
-	return &DialectFeatures{
-		AutoincrMode: IncrAutoincrMode,
-	}
-}
-
 func (db *sqlite3) SQLType(c *schemas.Column) string {
 	switch t := c.SQLType.Name; t {
 	case schemas.Bool:
diff --git a/internal/statements/insert.go b/internal/statements/insert.go
index 8583b3b8..43d3c69a 100644
--- a/internal/statements/insert.go
+++ b/internal/statements/insert.go
@@ -100,11 +100,11 @@ func (statement *Statement) GenInsertSQL(colNames []string, args []interface{})
 			if needSeq {
 				if len(args) > 0 {
 					if _, err := buf.WriteString(","); err != nil {
-						return "", nil, err
+						return nil, err
 					}
 				}
 				if _, err := buf.WriteString(utils.SeqName(tableName) + ".nextval"); err != nil {
-					return "", nil, err
+					return nil, err
 				}
 			}
 			if len(exprs) > 0 {
@@ -112,7 +112,7 @@ func (statement *Statement) GenInsertSQL(colNames []string, args []interface{})
 					return nil, err
 				}
 				if err := exprs.WriteArgs(buf); err != nil {
-					return "", nil, err
+					return nil, err
 				}
 			}
 
@@ -144,11 +144,11 @@ func (statement *Statement) GenInsertSQL(colNames []string, args []interface{})
 			if needSeq {
 				if hasInsertColumns {
 					if _, err := buf.WriteString(","); err != nil {
-						return "", nil, err
+						return nil, err
 					}
 				}
 				if _, err := buf.WriteString(utils.SeqName(tableName) + ".nextval"); err != nil {
-					return "", nil, err
+					return nil, err
 				}
 			}
 
diff --git a/session_insert.go b/session_insert.go
index f6846a9d..5ea1dd66 100644
--- a/session_insert.go
+++ b/session_insert.go
@@ -284,7 +284,7 @@ func (session *Session) insertStruct(bean interface{}) (int64, error) {
 	if err != nil {
 		return 0, err
 	}
-	sqlStr = session.engine.dialect.Quoter().Replace(sqlStr)
+	var sqlStr = session.engine.dialect.Quoter().Replace(buf.String())
 
 	handleAfterInsertProcessorFunc := func(bean interface{}) {
 		if session.isAutoCommit {
diff --git a/session_schema.go b/session_schema.go
index ef0850cb..500e2a0c 100644
--- a/session_schema.go
+++ b/session_schema.go
@@ -148,14 +148,11 @@ func (session *Session) DropTable(beanOrTableName interface{}) error {
 }
 
 func (session *Session) dropTable(beanOrTableName interface{}) error {
-	var tableName, autoIncrementCol string
+	var tableName string
 	switch beanOrTableName.(type) {
 	case *schemas.Table:
 		table := beanOrTableName.(*schemas.Table)
 		tableName = table.Name
-		if table.AutoIncrColumn() != nil {
-			autoIncrementCol = table.AutoIncrColumn().Name
-		}
 	case string:
 		tableName = beanOrTableName.(string)
 	default:
@@ -169,12 +166,9 @@ func (session *Session) dropTable(beanOrTableName interface{}) error {
 		} else {
 			tableName = table.Name
 		}
-		if table.AutoIncrColumn() != nil {
-			autoIncrementCol = table.AutoIncrColumn().Name
-		}
 	}
 
-	sqlStr, checkIfExist := session.engine.dialect.DropTableSQL(tableName, autoIncrementCol)
+	sqlStr, checkIfExist := session.engine.dialect.DropTableSQL(tableName)
 	if !checkIfExist {
 		exist, err := session.engine.dialect.IsTableExist(session.getQueryer(), session.ctx, tableName)
 		if err != nil {
@@ -189,10 +183,7 @@ func (session *Session) dropTable(beanOrTableName interface{}) error {
 	if _, err := session.exec(sqlStr); err != nil {
 		return err
 	}
-<<<<<<< HEAD
 
-=======
->>>>>>> 1805a60 (Fix test)
 	if session.engine.dialect.Features().AutoincrMode == dialects.IncrAutoincrMode {
 		return nil
 	}