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4e703d6719
Push some hopefully-uncontroversial bits extracted from an upcoming patch series, to remove non-relevant clutter from the main patches. In compact(), return immediately after setting REG_ASSERT error; continuing the loop would just lead to assertion failure below. (Ask me how I know.) In parseqatom(), remove assertion that moresubs() did its job. When moresubs actually did its job, this is redundant with that function's final assert; but when it failed on OOM, this is an assertion crash. We could avoid the crash by adding a NOERR() check before the assertion, but it seems better to subtract code than add it. (Note that there's a NOERR exit a few lines further down, and nothing else between here and there requires moresubs to have succeeded. So we don't really need an extra error exit.) This is a live bug in assert-enabled builds, but given the very low likelihood of OOM in moresub's tiny allocation, I don't think it's worth back-patching. On the other hand, it seems worthwhile to add an assertion that our intended v->subs[subno] target is still null by the time we are ready to insert into it, since there's a recursion in between. In pg_regexec, ensure we fflush any debug output on the way out, and try to make MDEBUG messages more uniform and helpful. (In particular, ensure that all of them are prefixed with the subre's id number, so one can match up entry and exit reports.) Add some test cases in test_regex to improve coverage of lookahead and lookbehind constraints. Adding these now is mainly to establish that this is indeed the existing behavior. Discussion: https://postgr.es/m/1340281.1613018383@sss.pgh.pa.us |
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PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.