71 lines
2.0 KiB
MySQL
71 lines
2.0 KiB
MySQL
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/*
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*This file is part of Adempiere ERP Bazaar
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*http://www.adempiere.org
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*
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*Copyright (C) 2006 Gavin Dunse
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*Copyright (C) 1999-2006 ComPiere, inc
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*
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*This program is free software; you can redistribute it and/or
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*modify it under the terms of the GNU General Public License
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*as published by the Free Software Foundation; either version 2
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*of the License, or (at your option) any later version.
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*
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*This program is distributed in the hope that it will be useful,
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*but WITHOUT ANY WARRANTY; without even the implied warranty of
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*MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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*GNU General Public License for more details.
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*
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*You should have received a copy of the GNU General Public License
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*along with this program; if not, write to the Free Software
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*Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.of
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*/
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/** Get Character at Position */
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SET search_path = adempiere, pg_catalog;
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CREATE OR REPLACE FUNCTION firstOf (
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IN TIMESTAMP WITH TIME ZONE, -- $1 date
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IN VARCHAR -- $2 part of date
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) RETURNS TIMESTAMP WITH TIME ZONE AS
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$$
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DECLARE
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datepart VARCHAR;
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BEGIN
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datepart = $2;
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IF $2 IN ('') THEN
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datepart = 'millennium';
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ELSEIF $2 IN ('') THEN
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datepart = 'century';
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ELSEIF $2 IN ('') THEN
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datepart = 'decade';
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ELSEIF $2 IN ('IYYY','IY','I') THEN
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datepart = 'year';
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ELSEIF $2 IN ('SYYYY','YYYY','YEAR','SYEAR','YYY','YY','Y') THEN
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datepart = 'year';
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ELSEIF $2 IN ('Q') THEN
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datepart = 'quarter';
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ELSEIF $2 IN ('MONTH','MON','MM','RM') THEN
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datepart = 'month';
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ELSEIF $2 IN ('IW') THEN
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datepart = 'week';
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ELSEIF $2 IN ('W') THEN
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datepart = 'week';
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ELSEIF $2 IN ('DDD','DD','J') THEN
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datepart = 'day';
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ELSEIF $2 IN ('DAY','DY','D') THEN
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datepart = 'day';
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ELSEIF $2 IN ('HH','HH12','HH24') THEN
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datepart = 'hour';
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ELSEIF $2 IN ('MI') THEN
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datepart = 'minute';
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ELSEIF $2 IN ('') THEN
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datepart = 'second';
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ELSEIF $2 IN ('') THEN
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datepart = 'milliseconds';
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ELSEIF $2 IN ('') THEN
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datepart = 'microseconds';
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END IF;
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RETURN date_trunc(datepart, CAST($1 AS DATE));
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END;
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$$ LANGUAGE plpgsql;
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