1 files changed, 36 insertions, 0 deletions
diff --git a/contrib/btree_gist/sql/not_equal.sql b/contrib/btree_gist/sql/not_equal.sql
new file mode 100644
index 0000000..6dfac5d
--- /dev/null
+++ b/contrib/btree_gist/sql/not_equal.sql
@@ -0,0 +1,36 @@
+
+SET enable_seqscan to false;
+
+-- test search for "not equals"
+
+CREATE TABLE test_ne (
+   a  TIMESTAMP,
+   b  NUMERIC
+);
+CREATE INDEX test_ne_idx ON test_ne USING gist (a, b);
+
+INSERT INTO test_ne SELECT '2009-01-01', 10.7 FROM generate_series(1,1000);
+INSERT INTO test_ne VALUES('2007-02-03', -91.3);
+INSERT INTO test_ne VALUES('2011-09-01', 43.7);
+INSERT INTO test_ne SELECT '2009-01-01', 10.7 FROM generate_series(1,1000);
+
+SET enable_indexscan to false;
+
+EXPLAIN (COSTS OFF) SELECT * FROM test_ne WHERE a <> '2009-01-01' AND b <> 10.7;
+
+SELECT * FROM test_ne WHERE a <> '2009-01-01' AND b <> 10.7;
+
+RESET enable_indexscan;
+
+-- test search for "not equals" using an exclusion constraint
+
+CREATE TABLE zoo (
+   cage   INTEGER,
+   animal TEXT,
+   EXCLUDE USING gist (cage WITH =, animal WITH <>)
+);
+
+INSERT INTO zoo VALUES(123, 'zebra');
+INSERT INTO zoo VALUES(123, 'zebra');
+INSERT INTO zoo VALUES(123, 'lion');
+INSERT INTO zoo VALUES(124, 'lion');