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Michael Paquier d7744d50a5 Fix initialization of pg_stat_get_lastscan() 
A NULL result should be reported when a stats timestamp is set to 0, but
c037471 missed that, leading to a confusing timestamp value after for
example a DML on a freshly-created relation with no scans done on it
yet.

This impacted the following attributes for two system views:
- pg_stat_all_tables.last_idx_scan
- pg_stat_all_tables.last_seq_scan
- pg_stat_all_indexes.last_idx_scan

Reported-by: Robert Treat
Analyzed-by: Peter Eisentraut
Author: Dave Page
Discussion: https://postgr.es/m/CABV9wwPzMfSaz3EfKXXDxKmMprbxwF5r6WPuxqA=5mzRUqfTGg@mail.gmail.com
2022-11-08 10:50:09 +09:00
config meson: Add initial version of meson based build system 2022-09-21 22:37:17 -07:00
contrib pg_stat_statements: fetch stmt location/length before it disappears. 2022-11-01 12:48:01 -04:00
doc Doc: Improve the description of confirmed_flush_lsn in pg_replication_slots. 2022-11-04 09:00:46 +05:30
src Fix initialization of pg_stat_get_lastscan() 2022-11-08 10:50:09 +09:00
.cirrus.yml meson: Add support for building with precompiled headers 2022-10-06 17:19:30 -07:00
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COPYRIGHT Update copyright for 2022 2022-01-07 19:04:57 -05:00
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README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00

README 

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/.