/*PGR-GNU*****************************************************************

_get_statement.sql

Copyright (c) 2014 Celia Virginia Vergara Castillo

mail: vicky at erosion.dev

------

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

********************************************************************PGR-GNU*/

--v3.0

CREATE FUNCTION _pgr_get_statement(o_sql text)

RETURNS TEXT AS

$BODY$

DECLARE

sql TEXT;

BEGIN

EXECUTE 'SELECT statement FROM pg_prepared_statements WHERE name =' || quote_literal(o_sql) || ' limit 1 ' INTO sql;

IF (sql IS NULL) THEN

RETURN o_sql;

ELSE

RETURN regexp_replace(regexp_replace(regexp_replace(sql, '\s(as)\s', '___foo___', 'i'), '^.*___foo___', '','i'), ';$', '');

END IF;

END

$BODY$

LANGUAGE plpgsql STABLE STRICT;

COMMENT ON FUNCTION _pgr_get_statement(TEXT)

IS 'pgRouting internal function';