From 868f30d1ff46ec9b8a048bb79fbb511f458fd769 Mon Sep 17 00:00:00 2001
From: Jo <46752250+georgesittas@users.noreply.github.com>
Date: Sun, 16 Jun 2024 19:08:56 +0300
Subject: [PATCH] Fix: improve schema error handling (#3663)

---
 sqlglot/schema.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sqlglot/schema.py b/sqlglot/schema.py
index 9e7aa65a43..8a551949b0 100644
--- a/sqlglot/schema.py
+++ b/sqlglot/schema.py
@@ -386,6 +386,8 @@ def _normalize(self, schema: t.Dict) -> t.Dict:
 
             if not isinstance(columns, dict):
                 raise SchemaError(error_msg.format(".".join(keys[:-1]), len(flattened_schema[0])))
+            if not columns:
+                raise SchemaError(f"Table {'.'.join(keys[:-1])} must have at least one column")
             if isinstance(first(columns.values()), dict):
                 raise SchemaError(
                     error_msg.format(