diff options
Diffstat (limited to 'sqlglot/optimizer/eliminate_subqueries.py')
| -rw-r--r-- | sqlglot/optimizer/eliminate_subqueries.py | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sqlglot/optimizer/eliminate_subqueries.py b/sqlglot/optimizer/eliminate_subqueries.py index af42f25..1ab7768 100644 --- a/sqlglot/optimizer/eliminate_subqueries.py +++ b/sqlglot/optimizer/eliminate_subqueries.py @@ -142,13 +142,14 @@ def _eliminate_derived_table(scope, existing_ctes, taken): if scope.parent.pivots or isinstance(scope.parent.expression, exp.Lateral): return None - parent = scope.expression.parent + # Get rid of redundant exp.Subquery expressions, i.e. those that are just used as wrappers + to_replace = scope.expression.parent.unwrap() name, cte = _new_cte(scope, existing_ctes, taken) + table = exp.alias_(exp.table_(name), alias=to_replace.alias or name) + table.set("joins", to_replace.args.get("joins")) - table = exp.alias_(exp.table_(name), alias=parent.alias or name) - table.set("joins", parent.args.get("joins")) + to_replace.replace(table) - parent.replace(table) return cte |