!4706 【bugfix】创建视图的语法中禁掉自定义变量的场景

Merge pull request !4706 from yuhuanhuan/signal_resignal_demand

src/include/miscadmin.h

@@ -139,6 +139,7 @@ extern const uint32 GB18030_2022_VERSION_NUM;
 extern const uint32 PARTITION_ACCESS_EXCLUSIVE_LOCK_UPGRADE_VERSION;
 extern const uint32 SPQ_VERSION_NUM;
 extern const uint32 UPSERT_ALIAS_VERSION_NUM;
+extern const uint32 SELECT_STMT_HAS_USERVAR;
 
 extern void register_backend_version(uint32 backend_version);
 extern bool contain_backend_version(uint32 version_number);

src/include/nodes/parsenodes_common.h

@@ -2114,6 +2114,7 @@ typedef struct Query {
     void* intoPolicy;
     ParentStmtType parentStmtType;
 #endif
+    bool has_uservar;
 } Query;
 
 /* ----------------------

src/include/parser/parse_node.h

@@ -284,6 +284,7 @@ struct ParseState {
      */
     List* orderbyCols; 
     List* p_indexhintLists; /*Force or use index in index hint list*/
+    bool has_uservar;
 };
 
 /* An element of p_relnamespace or p_varnamespace */