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Andres Freund d18d4bca81 Improve bit perturbation in TupleHashTableHash. 
The changes in b81b5a96f4 did not fully
address the issue, because the bit-mixing of the IV into the final
hash-key didn't prevent clustering in the input-data survive in the
output data.

This didn't cause a lot of problems because of the additional growth
conditions added d4c62a6b62. But as we
want to rein those in due to explosive growth in some edges, this
needs to be fixed.

Author: Andres Freund
Discussion: https://postgr.es/m/20171127185700.1470.20362@wrigleys.postgresql.org
Backpatch: 10, where simplehash was introduced
2018-01-29 11:24:57 -08:00
..
authentication Avoid and detect SIGPIPE race in TAP tests. 2017-12-16 10:03:38 -08:00
examples Update copyright via script for 2017 2017-01-03 13:48:53 -05:00
isolation Avoid crash during EvalPlanQual recheck of an inner indexscan. 2018-01-27 13:52:24 -05:00
locale Add a temp-install prerequisite to "check"-like targets not having one. 2017-11-05 18:51:15 -08:00
mb Fix MB regression tests for WAL-logging of hash indexes. 2017-03-15 07:25:36 -04:00
modules Add a temp-install prerequisite to "check"-like targets not having one. 2017-11-05 18:51:15 -08:00
perl Avoid and detect SIGPIPE race in TAP tests. 2017-12-16 10:03:38 -08:00
recovery In tests, await an LSN no later than the recovery target. 2017-12-31 21:58:33 -08:00
regress Improve bit perturbation in TupleHashTableHash. 2018-01-29 11:24:57 -08:00
ssl Remove incorrect comment 2017-06-17 10:19:48 +02:00
subscription Don't reset additional columns on subscriber to NULL on UPDATE 2017-11-03 12:28:08 -04:00
thread Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
Makefile Add TAP tests for password-based authentication methods. 2017-03-17 11:34:16 +02:00
README Add TAP tests for password-based authentication methods. 2017-03-17 11:34:16 +02:00

README 

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

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

subscription/
  Tests for logical replication

thread/
  A thread-safety-testing utility used by configure