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"regress" is a new mode added to compute_query_id aimed at facilitating regression testing when a module computing query IDs is loaded into the backend, like pg_stat_statements. It works the same way as "auto", meaning that query IDs are computed if a module enables it, except that query IDs are hidden in EXPLAIN outputs to ensure regression output stability. Like any GUCs of the kind (force_parallel_mode, etc.), this new configuration can be added to an instance's postgresql.conf, or just passed down with PGOPTIONS at command level. compute_query_id uses an enum for its set of option values, meaning that this addition ensures ABI compatibility. Using this new configuration mode allows installcheck-world to pass when running the tests on an instance with pg_stat_statements enabled, stabilizing the test output while checking the paths doing query ID computations. Reported-by: Anton Melnikov Reviewed-by: Julien Rouhaud Discussion: https://postgr.es/m/1634283396.372373993@f75.i.mail.ru Discussion: https://postgr.es/m/YgHlxgc/OimuPYhH@paquier.xyz Backpatch-through: 14 |
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