add debug log

Signed-off-by: y_static_y@sina.com <y_static_y@sina.com>
pingcap · May 24, 2024 · 1a740ef · 1a740ef
1 parent 9fa525f
commit 1a740ef
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/pkg/util/dbutil/common.go b/pkg/util/dbutil/common.go
@@ -894,9 +894,16 @@ func GetKeyspaceNameFromTiDB(db *sql.DB) (string, error) {
 		return "", nil
 	}
 
+	getConfigTableSQL := "select  TABLE_NAME  from  INFORMATION_SCHEMA . TABLES  where TABLE_SCHEMA ='INFORMATION_SCHEMA' and  TABLE_NAME ='CLUSTER_CONFIG'"
+	rows, err := db.Query(getConfigTableSQL)
+
+	if !rows.Next() {
+		return "", nil
+	}
+
 	sql := "select * from INFORMATION_SCHEMA.CLUSTER_CONFIG where TYPE='tidb'"
 	log.Info("GetKeyspaceNameFromTiDB", zap.String("sql", sql))
-	rows, err := db.Query(sql)
+	rows, err = db.Query(sql)
 	if err != nil {
 		return "", err
 	}