postgres
diff --git a/‎src/backend/parser/gram.y
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+3-3Lines changed: 3 additions & 3 deletions b/‎src/backend/parser/gram.y
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+3-3Lines changed: 3 additions & 3 deletions
diff --git a/‎src/test/regress/expected/sqljson_jsontable.out
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+5Lines changed: 5 additions & 0 deletions b/‎src/test/regress/expected/sqljson_jsontable.out
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+5Lines changed: 5 additions & 0 deletions
diff --git a/‎src/test/regress/sql/sqljson_jsontable.sql
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+3Lines changed: 3 additions & 0 deletions b/‎src/test/regress/sql/sqljson_jsontable.sql
Copy file name to clipboardExpand all lines: src/test/regress/sql/sqljson_jsontable.sql
+3Lines changed: 3 additions & 0 deletions
@@ -14265,7 +14265,7 @@ json_table_column_definition:
 				}
 			| ColId Typename
 				EXISTS json_table_column_path_clause_opt
-				json_behavior_clause_opt
+				json_on_error_clause_opt
 				{
 					JsonTableColumn *n = makeNode(JsonTableColumn);
 
@@ -14276,8 +14276,8 @@ json_table_column_definition:
 					n->wrapper = JSW_NONE;
 					n->quotes = JS_QUOTES_UNSPEC;
 					n->pathspec = (JsonTablePathSpec *) $4;
-					n->on_empty = (JsonBehavior *) linitial($5);
-					n->on_error = (JsonBehavior *) lsecond($5);
+					n->on_empty = NULL;
+					n->on_error = (JsonBehavior *) $5;
 					n->location = @1;
 					$$ = (Node *) n;
 				}
 
@@ -1067,3 +1067,8 @@ CREATE OR REPLACE VIEW public.jsonb_table_view7 AS
         ) sub
 DROP VIEW jsonb_table_view7;
 DROP TABLE s;
+-- Prevent ON EMPTY specification on EXISTS columns
+SELECT * FROM JSON_TABLE(jsonb '1', '$' COLUMNS (a int exists empty object on empty));
+ERROR:  syntax error at or near "empty"
+LINE 1: ...sonb '1', '$' COLUMNS (a int exists empty object on empty));
+                                                               ^
@@ -518,3 +518,6 @@ SELECT sub.* FROM s,
 \sv jsonb_table_view7
 DROP VIEW jsonb_table_view7;
 DROP TABLE s;
+
+-- Prevent ON EMPTY specification on EXISTS columns
+SELECT * FROM JSON_TABLE(jsonb '1', '$' COLUMNS (a int exists empty object on empty));