1 files changed, 23 insertions, 0 deletions
diff --git a/tests/fixtures/optimizer/qualify_columns.sql b/tests/fixtures/optimizer/qualify_columns.sql
index 74e2d0a..3013bba 100644
--- a/tests/fixtures/optimizer/qualify_columns.sql
+++ b/tests/fixtures/optimizer/qualify_columns.sql
@@ -131,6 +131,14 @@ SELECT DATE_TRUNC(x.a, MONTH) AS a FROM x AS x;
 SELECT x FROM READ_PARQUET('path.parquet', hive_partition=1);
 SELECT _q_0.x AS x FROM READ_PARQUET('path.parquet', hive_partition = 1) AS _q_0;
 
+# execute: false
+select * from (values (1, 2));
+SELECT _q_0._col_0 AS _col_0, _q_0._col_1 AS _col_1 FROM (VALUES (1, 2)) AS _q_0(_col_0, _col_1);
+
+# execute: false
+select * from (values (1, 2)) x;
+SELECT x._col_0 AS _col_0, x._col_1 AS _col_1 FROM (VALUES (1, 2)) AS x(_col_0, _col_1);
+
 --------------------------------------
 -- Derived tables
 --------------------------------------
@@ -317,6 +325,21 @@ SELECT COALESCE(y.b, z.b) AS b, COALESCE(y.c, z.c) AS c FROM y AS y JOIN z AS z
 SELECT * FROM y JOIN z USING(b, c) WHERE b = 2 AND c = 3;
 SELECT COALESCE(y.b, z.b) AS b, COALESCE(y.c, z.c) AS c FROM y AS y JOIN z AS z ON y.b = z.b AND y.c = z.c WHERE COALESCE(y.b, z.b) = 2 AND COALESCE(y.c, z.c) = 3;
 
+-- We can safely convert `b` to `x.b` in the following two queries, because the original queries
+-- would be invalid if `b` also existed in `t`'s schema (which we don't know), due to ambiguity.
+
+# execute: false
+SELECT b FROM x JOIN t USING(a);
+SELECT x.b AS b FROM x AS x JOIN t AS t ON x.a = t.a;
+
+# execute: false
+SELECT b FROM t JOIN x USING(a);
+SELECT x.b AS b FROM t AS t JOIN x AS x ON t.a = x.a;
+
+# execute: false
+SELECT a FROM t1 JOIN t2 USING(a);
+SELECT COALESCE(t1.a, t2.a) AS a FROM t1 AS t1 JOIN t2 AS t2 ON t1.a = t2.a;
+
 --------------------------------------
 -- Hint with table reference
 --------------------------------------