diff options
Diffstat (limited to 'sqlglot/optimizer/pushdown_projections.py')
| -rw-r--r-- | sqlglot/optimizer/pushdown_projections.py | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sqlglot/optimizer/pushdown_projections.py b/sqlglot/optimizer/pushdown_projections.py index abd9492..49789ac 100644 --- a/sqlglot/optimizer/pushdown_projections.py +++ b/sqlglot/optimizer/pushdown_projections.py @@ -6,7 +6,7 @@ from sqlglot.optimizer.scope import Scope, traverse_scope # Sentinel value that means an outer query selecting ALL columns SELECT_ALL = object() -# SELECTION TO USE IF SELECTION LIST IS EMPTY +# Selection to use if selection list is empty DEFAULT_SELECTION = alias("1", "_") @@ -91,7 +91,7 @@ def _remove_unused_selections(scope, parent_selections): # If there are no remaining selections, just select a single constant if not new_selections: - new_selections.append(DEFAULT_SELECTION) + new_selections.append(DEFAULT_SELECTION.copy()) scope.expression.set("expressions", new_selections) return removed_indexes @@ -102,5 +102,5 @@ def _remove_indexed_selections(scope, indexes_to_remove): selection for i, selection in enumerate(scope.selects) if i not in indexes_to_remove ] if not new_selections: - new_selections.append(DEFAULT_SELECTION) + new_selections.append(DEFAULT_SELECTION.copy()) scope.expression.set("expressions", new_selections) |