Update app.py

app.py

@@ -7,7 +7,7 @@ def greet(SQL_Query):
     if "limit" not in SQL_Query.lower():
         raise gr.Error("You should use the LIMIT clause or it may take too much time to run your query. For example: ```LIMIT 10000```")
     df = con.sql(SQL_Query).df()
-    if df.columns:  # truncate long strings
+    if len(df.columns) > 0:  # truncate long strings
         df = df.apply(lambda x: x.apply(lambda y: y[:150 // len(df.columns)] + "..." if isinstance(y, str) and len(y) > 150 // len(df.columns) else y))
     return df