[PGPRO-11393] Added test for "ORDER BY" error message

If the "rum" index is created without the "WITH" operator,
two columns must be specified for "ORDER BY" to work.
Added a test that checks for an error message if only one
column is specified in the "ORDER BY".

Tags: rum

expected/orderby.out

@@ -460,6 +460,11 @@ SELECT id, d FROM tsts WHERE  t @@ 'wr&qh' AND d >= '2016-05-16 14:21:25' ORDER
  458 | Fri May 20 21:21:22.326724 2016
 (3 rows)
 
+-- Test "ORDER BY" error message
+DROP INDEX tsts_idx;
+CREATE INDEX tsts_idx ON tsts USING rum (t rum_tsvector_addon_ops, d);
+SELECT id, d, d <=> '2016-05-16 14:21:25' FROM tsts WHERE t @@ 'wr&qh' ORDER BY d <=> '2016-05-16 14:21:25' LIMIT 5;
+ERROR:  cannot order without attribute 2 in ORDER BY clause
 -- Test multicolumn index
 RESET enable_indexscan;
 RESET enable_indexonlyscan;

sql/orderby.sql

@@ -95,6 +95,13 @@ SELECT id, d FROM tsts WHERE  t @@ 'wr&qh' AND d <= '2016-05-16 14:21:25' ORDER
 SELECT id, d FROM tsts WHERE  t @@ 'wr&qh' AND d >= '2016-05-16 14:21:25' ORDER BY d ASC LIMIT 3;
 SELECT id, d FROM tsts WHERE  t @@ 'wr&qh' AND d >= '2016-05-16 14:21:25' ORDER BY d DESC LIMIT 3;
 
+-- Test "ORDER BY" error message
+DROP INDEX tsts_idx;
+
+CREATE INDEX tsts_idx ON tsts USING rum (t rum_tsvector_addon_ops, d);
+
+SELECT id, d, d <=> '2016-05-16 14:21:25' FROM tsts WHERE t @@ 'wr&qh' ORDER BY d <=> '2016-05-16 14:21:25' LIMIT 5;
+
 -- Test multicolumn index
 
 RESET enable_indexscan;