Fix master/slave bug (#2004)

Reviewed-on: https://gitea.com/xorm/xorm/pulls/2004
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-committed-by: Lunny Xiao <xiaolunwen@gmail.com>

engine_group.go

@@ -237,3 +237,31 @@ func (eg *EngineGroup) Slave() *Engine {
 func (eg *EngineGroup) Slaves() []*Engine {
 	return eg.slaves
 }
+
+// Query execcute a select SQL and return the result
+func (eg *EngineGroup) Query(sqlOrArgs ...interface{}) (resultsSlice []map[string][]byte, err error) {
+	sess := eg.NewSession()
+	sess.isAutoClose = true
+	return sess.Query(sqlOrArgs...)
+}
+
+// QueryInterface execcute a select SQL and return the result
+func (eg *EngineGroup) QueryInterface(sqlOrArgs ...interface{}) ([]map[string]interface{}, error) {
+	sess := eg.NewSession()
+	sess.isAutoClose = true
+	return sess.QueryInterface(sqlOrArgs...)
+}
+
+// QueryString execcute a select SQL and return the result
+func (eg *EngineGroup) QueryString(sqlOrArgs ...interface{}) ([]map[string]string, error) {
+	sess := eg.NewSession()
+	sess.isAutoClose = true
+	return sess.QueryString(sqlOrArgs...)
+}
+
+// Rows execcute a select SQL and return the result
+func (eg *EngineGroup) Rows(bean interface{}) (*Rows, error) {
+	sess := eg.NewSession()
+	sess.isAutoClose = true
+	return sess.Rows(bean)
+}

session_raw.go

@@ -6,6 +6,7 @@ package xorm
 
 import (
 	"database/sql"
+	"strings"
 
 	"xorm.io/xorm/core"
 )
@@ -32,7 +33,7 @@ func (session *Session) queryRows(sqlStr string, args ...interface{}) (*core.Row
 
 	if session.isAutoCommit {
 		var db *core.DB
-		if session.sessionType == groupSession {
+		if session.sessionType == groupSession && strings.EqualFold(sqlStr[:6], "select") {
 			db = session.engine.engineGroup.Slave().DB()
 		} else {
 			db = session.DB()