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SQL-92 in TPC Benchmarks: Are They Still Relevant?
- The author explores whether queries from analytics benchmarks written on SQL-92 are irrelevant and inefficient in 2021, considering the window functions introduced in SQL:2003.
- The original benchmark comparison between PostgreSQL and DuckDB was based on an execution time that exceeded one minute, caused by an inefficient SQL query.
- Efficient SQL queries perform well with PostgreSQL-compatible databases, compared to inefficient ones.
- The author writes an SQL query to address the business question, which uses standard SQL features established 29 years ago and implemented in all databases.
- The author finds it easier to reason through each step and obtain accurate results using structured SQL queries with a WITH clause to define common table expressions.
- The author recommends focusing on queries that avoid inefficient code to effectively compare performance with PostgreSQL-compatible databases.
- PostgreSQL has prioritized simplicity in its code, which means it may perform poorly with poorly designed queries.
- Indexing tables properly could further optimize query performance.
- The author concludes that running benchmarks with queries that ignore the past 30 years of SQL is not recommended.
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