Pg_re2: Postgres extension for fast, RE2-powered regular expressions in Postgres
16 hours ago
- #performance optimization
- #ClickHouse
- #regular expressions
- ClickHouse introduces pg_re2, a Postgres extension for fast RE2-powered regular expressions, emphasizing speed and compatibility.
- RE2 uses finite automata for faster, more predictable performance compared to Postgres's backtracking POSIX regex, with benchmarks showing 1.8x to 8.6x speedups.
- pg_re2 adds index support (@~ operator) with btree and GIN indexes, providing 1.1x to 1.8x acceleration and better trigram handling for patterns.
- Compatibility with ClickHouse regex functions is key, as pg_re2 addresses syntax differences (e.g., \b meaning word boundary vs. backspace) to ensure consistent results when using pg_clickhouse.
- pg_re2 functions push down to ClickHouse, eliminating discrepancies and improving performance for analytical queries, and is recommended for a unified high-performance data platform.