419ce13b70
Commit 4e5920e6de disallowed RESPECT NULLS/IGNORE NULLS on
non-window functions, but it also caused the parser to check for
that clause too early in some cases. As a result, calls such as a
nonexistent function with IGNORE NULLS no longer reported the more
helpful "function ... does not exist" error, and aggregate functions
used as window functions reported "only window functions accept ..."
instead of the more accurate aggregate-specific error.
This commit moves the RESPECT NULLS/IGNORE NULLS checks so that
helpful existing errors are preserved where appropriate. This restores
"function ... does not exist" for nonexistent functions, while still
reporting that plain functions are not window functions and that
aggregates do not accept null treatment.
Author: Fujii Masao <masao.fujii@gmail.com>
Reviewed-by: Tatsuo Ishii <ishii@postgresql.org>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://postgr.es/m/CAHGQGwH7VY_0GkhycyYZ4czkPGL0uGzDyOxk3uuFOSRR7wFY3g@mail.gmail.com
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.
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