Update packages/bigframes/bigframes/core/pyformat.py

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: tswast

packages/bigframes/bigframes/core/pyformat.py

@@ -121,7 +121,7 @@ def is_biglake(
         contains_biglake = value._block.expr.node.reduce_up(is_biglake)
 
         if contains_biglake:
-            sql_query, _, _ = value._to_sql_query(include_index=False)
+            sql_query, _, _ = value._to_sql_query(include_index=True)
             return f"({sql_query})"
 
         return _table_to_sql(value._to_placeholder_table(dry_run=dry_run))