Merging upstream version 11.0.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/fixtures/optimizer/expand_laterals.sql

@@ -0,0 +1,40 @@
+# title: expand alias reference
+SELECT
+  x.a + 1 AS i,
+  i + 1 AS j,
+  j + 1 AS k
+FROM x;
+SELECT
+  x.a + 1 AS i,
+  x.a + 1 + 1 AS j,
+  x.a + 1 + 1 + 1 AS k
+FROM x;
+
+# title: noop - reference comes before alias
+SELECT
+  b + 1 AS j,
+  x.a + 1 AS i
+FROM x;
+SELECT
+  b + 1 AS j,
+  x.a + 1 AS i
+FROM x;
+
+
+# title: subquery
+SELECT
+  *
+FROM (
+  SELECT
+    x.a + 1 AS i,
+    i + 1 AS j
+  FROM x
+);
+SELECT
+  *
+FROM (
+  SELECT
+    x.a + 1 AS i,
+    x.a + 1 + 1 AS j
+  FROM x
+);