Adding upstream version 10.1.3.upstream/10.1.3

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

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/fixtures/optimizer/eliminate_subqueries.sql b/tests/fixtures/optimizer/eliminate_subqueries.sql
index f395c0a..c566657 100644
--- a/tests/fixtures/optimizer/eliminate_subqueries.sql
+++ b/tests/fixtures/optimizer/eliminate_subqueries.sql
@@ -77,3 +77,15 @@ WITH x_2 AS (SELECT * FROM x AS x JOIN y AS y ON x.id = y.id) SELECT x.id FROM x
 -- Existing duplicate CTE
 WITH y AS (SELECT a FROM x) SELECT a FROM (SELECT a FROM x) AS y JOIN y AS z;
 WITH y AS (SELECT a FROM x) SELECT a FROM y AS y JOIN y AS z;
+
+-- Nested CTE
+WITH cte1 AS (SELECT a FROM x) SELECT a FROM (WITH cte2 AS (SELECT a FROM cte1) SELECT a FROM cte2);
+WITH cte1 AS (SELECT a FROM x), cte2 AS (SELECT a FROM cte1), cte AS (SELECT a FROM cte2 AS cte2) SELECT a FROM cte AS cte;
+
+-- Nested CTE inside CTE
+WITH cte1 AS (WITH cte2 AS (SELECT a FROM x) SELECT t.a FROM cte2 AS t) SELECT a FROM cte1;
+WITH cte2 AS (SELECT a FROM x), cte1 AS (SELECT t.a FROM cte2 AS t) SELECT a FROM cte1;
+
+-- Duplicate CTE nested in CTE
+WITH cte1 AS (SELECT a FROM x), cte2 AS (WITH cte3 AS (SELECT a FROM x) SELECT a FROM cte3) SELECT a FROM cte2;
+WITH cte1 AS (SELECT a FROM x), cte2 AS (SELECT a FROM cte1 AS cte3) SELECT a FROM cte2;