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Dev.to
7/13/2026
DuckDB Iceberg MERGE, PostgreSQL GUCs, SQLite Optimization Checklist

DuckDB Iceberg MERGE, PostgreSQL GUCs, SQLite Optimization Checklist

Short summary

A database engineering newsletter covering three topics: DuckDB v1.5.3 adds MERGE INTO and ALTER TABLE support for Apache Iceberg tables plus V3 compatibility; a PostgreSQL article explaining why the enable_tidscan GUC can be safely ignored by most practitioners; and a SQLite forum discussion on building a practical optimization checklist. Summaries are informative but paraphrased from original sources without deep original analysis.

  • •DuckDB v1.5.3 adds MERGE INTO, ALTER TABLE, partition transforms, and Iceberg V3 support
  • •PostgreSQL's enable_tidscan GUC is a niche parameter most DBAs will never need to adjust
  • •SQLite community discusses a practical optimization checklist for embedded database performance

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