1 files changed, 9 insertions, 4 deletions
diff --git a/src/test/regress/input/constraints.source b/src/test/regress/input/constraints.source
index a39cb8b0bc..a4f02d59d7 100644
--- a/src/test/regress/input/constraints.source
+++ b/src/test/regress/input/constraints.source
@@ -34,12 +34,17 @@ INSERT INTO DEFAULTEXPR_TBL (i2) VALUES (NULL);
 
 SELECT '' AS four, * FROM DEFAULTEXPR_TBL;
 
--- errors
--- test for:
---  extraneous comma
---  booleans not allowed
+-- syntax errors
+--  test for extraneous comma
 CREATE TABLE error_tbl (i int DEFAULT (100, ));
+--  this will fail because gram.y uses b_expr not a_expr for defaults,
+--  to avoid a shift/reduce conflict that arises from NOT NULL being
+--  part of the column definition syntax:
 CREATE TABLE error_tbl (b1 bool DEFAULT 1 < 2);
+--  this should work, however:
+CREATE TABLE error_tbl (b1 bool DEFAULT (1 < 2));
+
+DROP TABLE error_tbl;
 
 --
 -- CHECK syntax