Adding upstream version 6.0.4.upstream/6.0.4

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

1 files changed, 16 insertions, 0 deletions

diff --git a/sqlglot/optimizer/expand_multi_table_selects.py b/sqlglot/optimizer/expand_multi_table_selects.py
new file mode 100644
index 0000000..ba562df
--- /dev/null
+++ b/sqlglot/optimizer/expand_multi_table_selects.py
@@ -0,0 +1,16 @@
+from sqlglot import exp
+
+
+def expand_multi_table_selects(expression):
+    for from_ in expression.find_all(exp.From):
+        parent = from_.parent
+
+        for query in from_.expressions[1:]:
+            parent.join(
+                query,
+                join_type="CROSS",
+                copy=False,
+            )
+            from_.expressions.remove(query)
+
+    return expression