postgres

History

Tom Lane d761fe2182 Fix precision and rounding issues in money multiplication and division. The cash_div_intX functions applied rint() to the result of the division. That's not merely useless (because the result is already an integer) but it causes precision loss for values larger than 2^52 or so, because of the forced conversion to float8. On the other hand, the cash_mul_fltX functions neglected to apply rint() to their multiplication results, thus possibly causing off-by-one outputs. Per C standard, arithmetic between any integral value and a float value is performed in float format. Thus, cash_mul_flt4 and cash_div_flt4 produced answers good to only about six digits, even when the float value is exact. We can improve matters noticeably by widening the float inputs to double. (It's tempting to consider using "long double" arithmetic if available, but that's probably too much of a stretch for a back-patched fix.) Also, document that cash_div_intX operators truncate rather than round. Per bug #14663 from Richard Pistole. Back-patch to all supported branches. Discussion: https://postgr.es/m/22403.1495223615@sss.pgh.pa.us		9 years ago
..
authentication	Post-PG 10 beta1 pgperltidy run	9 years ago
examples	Update copyright via script for 2017	9 years ago
isolation	Fix ALTER SEQUENCE locking	9 years ago
locale	Clean up Perl code according to perlcritic	9 years ago
mb	Fix MB regression tests for WAL-logging of hash indexes.	9 years ago
modules	Post-PG 10 beta1 pgperltidy run	9 years ago
perl	Post-PG 10 beta1 pgperltidy run	9 years ago
recovery	Post-PG 10 beta1 pgperltidy run	9 years ago
regress	Fix precision and rounding issues in money multiplication and division.	9 years ago
ssl	Post-PG 10 beta1 pgperltidy run	9 years ago
subscription	Post-PG 10 beta1 pgperltidy run	9 years ago
thread	Update copyright via script for 2017	9 years ago
Makefile	Add TAP tests for password-based authentication methods.	9 years ago
README	Add TAP tests for password-based authentication methods.	9 years ago

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