90 lines
2.2 KiB
PL/PgSQL
90 lines
2.2 KiB
PL/PgSQL
/*
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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) 2007 Low Heng Sin
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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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CREATE OR REPLACE FUNCTION addDays(datetime TIMESTAMP WITH TIME ZONE, days Numeric)
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RETURNS TIMESTAMP WITH TIME ZONE AS $$
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BEGIN
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if datetime is null or days is null then
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return null;
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end if;
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return datetime + (interval '1' second * (86400 * days));
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END;
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$$ LANGUAGE plpgsql IMMUTABLE;
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CREATE OR REPLACE FUNCTION adddays (in inter interval, in days numeric)
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RETURNS integer AS $$
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BEGIN
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RETURN ( EXTRACT( EPOCH FROM ( inter ) ) / 86400 ) + days;
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END;
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$$ LANGUAGE plpgsql IMMUTABLE;
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CREATE OR REPLACE FUNCTION subtractdays (day TIMESTAMP WITH TIME ZONE, days NUMERIC)
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RETURNS TIMESTAMP WITH TIME ZONE AS $$
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BEGIN
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RETURN addDays(day,(days * -1));
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END;
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$$ LANGUAGE plpgsql IMMUTABLE;
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CREATE OR REPLACE FUNCTION subtractdays (in inter interval, in days numeric)
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RETURNS integer AS $$
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BEGIN
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RETURN ( EXTRACT( EPOCH FROM ( inter ) ) / 86400 ) - days;
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END;
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$$ LANGUAGE plpgsql IMMUTABLE;
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CREATE OPERATOR + (
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PROCEDURE = adddays,
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LEFTARG = timestamp with time zone,
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RIGHTARG = numeric,
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COMMUTATOR = OPERATOR(+)
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);
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CREATE OPERATOR + (
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PROCEDURE = adddays,
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LEFTARG = interval,
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RIGHTARG = numeric,
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COMMUTATOR = OPERATOR(-)
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);
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CREATE OPERATOR - (
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PROCEDURE = subtractdays,
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LEFTARG = timestamp with time zone,
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RIGHTARG = numeric,
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COMMUTATOR = OPERATOR(-)
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);
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CREATE OPERATOR - (
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PROCEDURE = subtractdays,
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LEFTARG = interval,
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RIGHTARG = numeric,
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COMMUTATOR = OPERATOR(-)
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);
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