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Tom Lane 7921927bbb Reverse the search order in afterTriggerAddEvent(). 
When scanning existing AfterTriggerSharedData records in search
of a match to the event being queued, we were examining the
records from oldest to newest.  But it makes more sense to do
the opposite.  The newest record is likely to be from the current
query, while the oldest is likely to be from some previous command
in the same transaction, which will likely have different details.

There aren't expected to be very many active AfterTriggerSharedData
records at once, so that this change is unlikely to make any
spectacular difference.  Still, having added a nontrivially-expensive
bms_equal call to this loop yesterday, I feel a need to shave cycles
where possible.

Discussion: https://postgr.es/m/4166712.1737583961@sss.pgh.pa.us
2025-01-23 11:08:05 -05:00
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README.md

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.

Copyright and license information can be found in the file COPYRIGHT.

General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.