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Mirror of the official PostgreSQL GIT repository. Note that this is just a *mirror* - we don't work with pull requests on github. To contribute, please see https://wiki.postgresql.org/wiki/Submitting_a_Patch
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Tom Lane b0fb2c6aa5 Refactor to avoid code duplication in transformPLAssignStmt. 
transformPLAssignStmt contained many lines cribbed directly from
transformSelectStmt.  I had supposed that we could manage to keep
the two copies in sync, but the bug just fixed in 7504d2be9 shows
that that hope was foolish.  Let's refactor so there's just one copy.

The main stumbling block to doing this is that transformPLAssignStmt
has a chunk of custom code that has to run after transformTargetList
but before we potentially modify the tlist further during analysis
of ORDER BY and GROUP BY.  Rather than make transformSelectStmt fully
aware of PLAssignStmt processing, I put that code into a callback
function.  It still feels a little bit ugly, but it's not too awful,
and surely it's better than a hundred lines of duplicated code.
The steps involved in processing a PLAssignStmt remain exactly
the same as before, just in different places.

Author: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/31027.1758919078@sss.pgh.pa.us
2025-09-27 17:17:51 -04:00
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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/.