From bcd7e5b279670fcfc38037e4baeec5a41cb36169 Mon Sep 17 00:00:00 2001
From: obdev <obdev@oceanbase.com>
Date: Wed, 20 Sep 2023 16:42:21 +0000
Subject: [PATCH] fix unable to parse udf with the same name as system function
 `current_user`

---
 src/sql/parser/sql_parser_mysql_mode.y | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/sql/parser/sql_parser_mysql_mode.y b/src/sql/parser/sql_parser_mysql_mode.y
index ca427c787..9c9d10dee 100755
--- a/src/sql/parser/sql_parser_mysql_mode.y
+++ b/src/sql/parser/sql_parser_mysql_mode.y
@@ -3090,6 +3090,19 @@ CURRENT_USER
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_FUN_SYS_CURRENT_USER, 1, NULL);
 }
+| relation_name '.' CURRENT_USER '(' ')'
+{
+  ParseNode *name_node = NULL;
+  ParseNode *function = NULL;
+  ParseNode *sub_obj_access_ref = NULL;
+  ParseNode *udf_node = NULL;
+  make_name_node(name_node, result->malloc_pool_, "current_user");
+  malloc_non_terminal_node(function, result->malloc_pool_, T_FUN_SYS, 2, name_node, NULL);
+  malloc_non_terminal_node(sub_obj_access_ref, result->malloc_pool_, T_OBJ_ACCESS_REF, 2, function, NULL);
+  malloc_non_terminal_node($$, result->malloc_pool_, T_OBJ_ACCESS_REF, 2, $1, sub_obj_access_ref);
+  malloc_non_terminal_node(udf_node, result->malloc_pool_, T_FUN_UDF, 4, $3, NULL, $1, NULL);
+  store_pl_ref_object_symbol(udf_node, result, REF_FUNC);
+}
 ;
 
 cur_date_func: