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view schema/updates/1310/01.import-changed.sql @ 4748:47922c1a088d

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Added a 'changed' column to the import.imports table. Changed is update each time the state changes (TODO: solve this with a trigger). The update script takes as approximation the time of the last log entry connected with the particular import.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 18 Oct 2019 15:34:34 +0200
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ALTER TABLE import.imports ADD COLUMN changed timestamp WITH time zone NOT NULL DEFAULT CURRENT_TIMESTAMP;

UPDATE import.imports imp SET
  changed = (SELECT coalesce(max(time), imp.changed)
             FROM import.import_logs
             WHERE import_id = imp.id);