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.. -*- coding: utf-8 -*-
.. :Project: pglast — Special functions documentation
.. :Created: mer 22 nov 2017 09:04:18 CET
.. :Author: Lele Gaifax <lele@metapensiero.it>
.. :License: GNU General Public License version 3 or later
.. :Copyright: © 2017, 2018, 2024 Lele Gaifax
..
===============================================================
:mod:`pglast.printers.sfuncs` --- Special function printers
===============================================================
The PostgreSQL parser *translates* some ``SQL`` constructs into function calls, for example the
expression ``EXTRACT(YEAR FROM date_column)`` is represented the same as
``pg_catalog.date_part('year', date_column)``.
This module declares some of those equivalences, implementing alternative printers that will be
used when the option `special_functions` of the :class:`output stream <.printer.RawStream>` is
set to ``True``.
.. automodule:: pglast.printers.sfuncs
:synopsis: Special function printers
:members:
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