Merging upstream version 7.1.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/tests/fixtures/optimizer/eliminate_ctes.sql b/tests/fixtures/optimizer/eliminate_ctes.sql
new file mode 100644
index 0000000..11e5e4f
--- /dev/null
+++ b/tests/fixtures/optimizer/eliminate_ctes.sql
@@ -0,0 +1,48 @@
+# title: CTE
+WITH q AS (
+  SELECT
+    a
+  FROM x
+)
+SELECT
+  a
+FROM x;
+SELECT
+  a
+FROM x;
+
+# title: Nested CTE
+SELECT
+  a
+FROM (
+  WITH q AS (
+    SELECT
+      a
+    FROM x
+  )
+  SELECT a FROM x
+);
+SELECT
+  a
+FROM (
+  SELECT
+    a
+  FROM x
+);
+
+# title: Chained CTE
+WITH q AS (
+  SELECT
+    a
+  FROM x
+), r AS (
+  SELECT
+    a
+  FROM q
+)
+SELECT
+  a
+FROM x;
+SELECT
+  a
+FROM x;