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This acts as a template of what can be achieved with the pluggable cumulative stats APIs introduced in 7949d9594582 for the variable-numbered case where stats entries are stored in the pgstats dshash, while being potentially useful on its own for injection points, say to add starting and/or stopping conditions based on the statistics (want to trigger a callback after N calls, for example?). Currently, the only data gathered is the number of times an injection point is run. More fields can always be added as required. All the routines related to the stats are located in their own file, called injection_stats.c in the test module injection_points, for clarity. The stats can be used only if the test module is loaded through shared_preload_libraries. The key of the dshash uses InvalidOid for the database, and an int4 hash of the injection point name as object ID. A TAP test is added to provide coverage for the new custom cumulative stats APIs, showing the persistency of the data across restarts, for example. Author: Michael Paquier Reviewed-by: Dmitry Dolgov, Bertrand Drouvot Discussion: https://postgr.es/m/Zmqm9j5EO0I4W8dx@paquier.xyz
PostgreSQL tests ================ This directory contains a variety of test infrastructure as well as some of the tests in PostgreSQL. Not all tests are here -- in particular, there are more in individual contrib/ modules and in src/bin. Not all these tests get run by "make check". Check src/test/Makefile to see which tests get run automatically. authentication/ Tests for authentication (but see also below) examples/ Demonstration programs for libpq that double as regression tests via "make check" isolation/ Tests for concurrent behavior at the SQL level kerberos/ Tests for Kerberos/GSSAPI authentication and encryption ldap/ Tests for LDAP-based authentication locale/ Sanity checks for locale data, encodings, etc mb/ Tests for multibyte encoding (UTF-8) support modules/ Extensions used only or mainly for test purposes, generally not suitable for installing in production databases perl/ Infrastructure for Perl-based TAP tests recovery/ Test suite for recovery and replication regress/ PostgreSQL's main regression test suite, pg_regress ssl/ Tests to exercise and verify SSL certificate handling subscription/ Tests for logical replication