Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/trafodion/pull/1658#discussion_r204855585
--- Diff: core/sql/parser/sqlparser.y ---
@@ -19430,6 +19432,124 @@ exists_predicate : TOK_EXISTS rel_subquery
$$ = new (PARSERHEAP()) Exists($2);
}
+overlaps_predicate : value_expression_list_paren TOK_OVERLAPS
value_expression_list_paren
+ {
+ ItemExprList exprList1($1, PARSERHEAP());
+ ItemExprList exprList2($3, PARSERHEAP());
+ //Syntax Rules:
+ // 1) The degrees of <row value predicand 1> and <row value
predicand 2> shall both be 2.
+ if ((exprList1.entries() != 2)
+ || (exprList1.entries() != exprList2.entries()))
+ {
+ *SqlParser_Diags << DgSqlCode(-4077)
--- End diff --
This is OK to have in the Parser, as it depends only on syntax.
---
