2242b26ce4
The code used a PG_RETURN_TIMESTAMPTZ() where the return type is
TimestampTz and not a Datum.
On 64-bit systems, there is no effect since this just ends up casting
64-bit integers back and forth. On 32-bit systems, timestamptz is
pass-by-reference. PG_RETURN_TIMESTAMPTZ() allocates new memory and
returns the address, meaning that the caller could interpret this as a
timestamp value.
The effect is using "date_trunc(..., 'infinity'::timestamptz) will
return random values (instead of the correct return value 'infinity').
Bug introduced in commit d85ce012f9.
Author: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/2d320b6f-b4af-4fbc-9eec-5d0fa15d187b@eisentraut.org
Discussion: https://postgr.es/m/4bf60a84-2862-4a53-acd5-8eddf134a60e@eisentraut.org
Backpatch-through: 18
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.
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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.
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