36 lines
1.5 KiB
PL/PgSQL
36 lines
1.5 KiB
PL/PgSQL
------------------------------------------------------------------------------;
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----
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---- locality-trigger.sql: compute localities for addresses
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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,
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---- USA.
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----
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---- Copyright (C) 2016 Simon Brooke for Radical Independence Campaign
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----
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------------------------------------------------------------------------------;
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---- See also: src/cljc/locality.cljc
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CREATE FUNCTION compute_locality() RETURNS trigger AS $compute_locality$
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BEGIN
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NEW.locality = (1000 * floor(NEW.latitude * 100)) -
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floor(NEW.longitude * 100);
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RETURN NEW;
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END;
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$compute_locality$ LANGUAGE plpgsql;
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CREATE TRIGGER compute_locality BEFORE INSERT OR UPDATE ON addresses
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FOR EACH ROW EXECUTE PROCEDURE compute_locality();
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