dehowef commented on code in PR #1562:
URL: https://github.com/apache/age/pull/1562#discussion_r1519318331
##########
src/backend/parser/cypher_gram.y:
##########
@@ -594,6 +599,53 @@ updating_clause:
| merge
;
+subquery_stmt:
+ single_subquery
+ {
+ $$ = $1;
+ }
+ | subquery_stmt UNION all_or_distinct subquery_stmt
+ {
+ $$ = list_make1(make_set_op(SETOP_UNION, $3, $1, $4));
+ }
+ ;
+
+subquery_stmt_no_return:
+ single_subquery_no_return
+ {
+ $$ = $1;
+ }
+ | subquery_stmt_no_return UNION all_or_distinct subquery_stmt_no_return
+ {
+ $$ = list_make1(make_set_op(SETOP_UNION, $3, $1, $4));
+ }
+ ;
+
+single_subquery:
+ subquery_part_init reading_clause_list return
+ {
+ $$ = list_concat($1, lappend($2, $3));
+ }
+ ;
+
+single_subquery_no_return:
+ subquery_part_init reading_clause_list
Review Comment:
Thanks for pointing that out~ I amended the commit. Feel free to merge it
whenever you see fit
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