graphql-engine/server/src-rsr/trigger.sql.j2

CREATE OR REPLACE function hdb_views.{{QUALIFIED_TRIGGER_NAME}}() RETURNS trigger
  LANGUAGE plpgsql
  AS $$
  DECLARE
    _old record;
    _new record;
    _data json;
  BEGIN
    IF TG_OP = 'UPDATE' THEN
      _old := {{OLD_ROW}};
      _new := {{NEW_ROW}};
    ELSE
    /* initialize _old and _new with dummy values for INSERT and UPDATE events*/
      _old := row((select 1));
      _new := row((select 1));
    END IF;
    _data := json_build_object(
      'old', {{OLD_PAYLOAD_EXPRESSION}},
      'new', {{NEW_PAYLOAD_EXPRESSION}}
    );
    IF (TG_OP <> 'UPDATE') OR (_old <> _new) THEN
      PERFORM hdb_catalog.insert_event_log(CAST(TG_TABLE_SCHEMA AS text), CAST(TG_TABLE_NAME AS text), CAST('{{NAME}}' AS text), TG_OP, _data);
    END IF;
    RETURN NULL;
  END;
$$;
DROP TRIGGER IF EXISTS {{QUALIFIED_TRIGGER_NAME}} ON {{QUALIFIED_TABLE}};
CREATE TRIGGER {{QUALIFIED_TRIGGER_NAME}} AFTER {{OPERATION}} ON {{QUALIFIED_TABLE}} FOR EACH ROW EXECUTE PROCEDURE hdb_views.{{QUALIFIED_TRIGGER_NAME}}();