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-rw-r--r--tests/fixtures/optimizer/simplify.sql9
1 files changed, 9 insertions, 0 deletions
diff --git a/tests/fixtures/optimizer/simplify.sql b/tests/fixtures/optimizer/simplify.sql
index 07e818f..7207ba2 100644
--- a/tests/fixtures/optimizer/simplify.sql
+++ b/tests/fixtures/optimizer/simplify.sql
@@ -79,6 +79,15 @@ NULL;
NULL = NULL;
NULL;
+NULL <=> NULL;
+TRUE;
+
+a IS NOT DISTINCT FROM a;
+TRUE;
+
+NULL IS DISTINCT FROM NULL;
+FALSE;
+
NOT (NOT TRUE);
TRUE;