From 3645cf4119620e8b01e57c7f9b5965400476f7d1 Mon Sep 17 00:00:00 2001
From: Phillip Cloud <417981+cpcloud@users.noreply.github.com>
Date: Sun, 30 Jul 2023 09:11:19 -0400
Subject: [PATCH] fix(sql): handle parsing aliases

---
 ibis/expr/sql.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/ibis/expr/sql.py b/ibis/expr/sql.py
index f84c0bfde893..d1f0075803fc 100644
--- a/ibis/expr/sql.py
+++ b/ibis/expr/sql.py
@@ -60,6 +60,13 @@ def to_sqlglot(self):
 
     def overlay(self, step):
         updates = {dep.name: convert(dep, catalog=self) for dep in step.dependencies}
+
+        # handle scan aliases: FROM foo AS bar
+        source = getattr(step, "source", None)
+        alias = getattr(source, "args", {}).get("alias")
+        if alias is not None and (source_name := self.get(source.name)) is not None:
+            self[alias.name] = source_name
+
         return Catalog({**self, **updates})