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seq_search_localized() returns the length of the matching prefix in *len, but because it internally case-folds the inputs, it gets confused on the length. The caller expects to get the length of the prefix in the original string, but what it actually returns is the length of the prefix after case-folding, which can be different if the case-folded characters have different byte-length than the original, or with ICU, if the case-folding changes the number of characters (e.g. "ß", the German double s). To fix, once we have determined that we have a match, work harder to find the match's length in the original string. This adds some overhead, but the strings are expected to be short. The function does "case-folding" by converting a string to upper-case, then to lower-case, which is a little ugly given that we have dedicated functions for case-folding nowadays. But switching to that doesn't seem appropriate to backpatch in a security fix, and that's not available in older stable versions, anyway. Author: Heikki Linnakangas <heikki.linnakangas@iki.fi> Reported-by: Xint Code Reviewed-by: Jeff Davis <pgsql@j-davis.com>
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