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regexp_match() is like regexp_matches(), but it disallows the 'g' flag and in consequence does not need to return a set. Instead, it returns a simple text array value, or NULL if there's no match. Previously people usually got that behavior with a sub-select, but this way is considerably more efficient. Documentation adjusted so that regexp_match() is presented first and then regexp_matches() is introduced as a more complicated version. This is a bit historically revisionist but seems pedagogically better. Still TODO: extend contrib/citext to support this function. Emre Hasegeli, reviewed by David Johnston Discussion: <CAE2gYzy42sna2ME_e3y1KLQ-4UBrB-eVF0SWn8QG39sQSeVhEw@mail.gmail.com> |
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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. examples/ Demonstration programs for libpq that double as regression tests via "make check" isolation/ Tests for concurrent behavior at the SQL level 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 thread/ A thread-safety-testing utility used by configure