- Updated various planner and deparser files to handle NULL or "?column?" as resname by generating meaningful column names.
- Ensured that generated names follow a consistent format to avoid parsing errors in complex queries.
- Added debug queries and tests to isolate and reproduce the issues related to intermediate results and subqueries.
- Created setup scripts for test tables and data to facilitate regression testing for PostgreSQL 18 compatibility.
Gurkan Indibay