Mercurial > gemma
view schema/updates/1437/01.historicise_fairway_dimensions.sql @ 5677:a57be8bfb6ea sr-v2
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author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sun, 11 Feb 2024 09:51:21 +0100 |
parents | 1cb5fca140e2 |
children |
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-- Drop trigger first to avoid execution during following operations DROP TRIGGER fairway_dimensions_area_unique ON waterway.fairway_dimensions; ALTER TABLE waterway.fairway_dimensions ADD validity tstzrange NOT NULL DEFAULT tstzrange(current_timestamp, NULL) CHECK (NOT isempty(validity)); -- Assume existing entries have been valid since last accepted import WITH imps AS ( SELECT changed, CAST(summary AS jsonb)->'fd-area' AS fd_area FROM import.imports WHERE kind = 'fd' AND state = 'accepted' ) UPDATE waterway.fairway_dimensions fd SET validity = tstzrange( COALESCE( (SELECT max(changed) FROM imps WHERE fd.id IN( SELECT id FROM jsonb_to_recordset(fd_area) AS fd_area (id bigint, lat numeric, lon numeric))), current_timestamp), NULL); CREATE CONSTRAINT TRIGGER fairway_dimensions_area_unique AFTER INSERT OR UPDATE OF area, validity, staging_done ON waterway.fairway_dimensions FOR EACH ROW EXECUTE FUNCTION prevent_st_equals( 'area', 'validity WITH &&', 'staging_done'); CREATE INDEX fairway_dimensions_validity ON waterway.fairway_dimensions USING GiST (validity);