mirror of https://github.com/citusdata/citus.git
36 lines
1.1 KiB
PL/PgSQL
36 lines
1.1 KiB
PL/PgSQL
/* citus--7.4-1--7.4-2 */
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CREATE OR REPLACE FUNCTION pg_catalog.citus_drop_trigger()
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RETURNS event_trigger
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LANGUAGE plpgsql
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SET search_path = pg_catalog
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AS $cdbdt$
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DECLARE
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v_obj record;
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sequence_names text[] := '{}';
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table_colocation_id integer;
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propagate_drop boolean := false;
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BEGIN
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-- collect set of dropped sequences to drop on workers later
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SELECT array_agg(object_identity) INTO sequence_names
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FROM pg_event_trigger_dropped_objects()
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WHERE object_type = 'sequence';
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FOR v_obj IN SELECT * FROM pg_event_trigger_dropped_objects()
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WHERE object_type IN ('table', 'foreign table')
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LOOP
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-- drop all shards and the metadata
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PERFORM master_drop_all_shards(v_obj.objid, v_obj.schema_name, v_obj.object_name);
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PERFORM master_drop_distributed_table_metadata(v_obj.objid, v_obj.schema_name, v_obj.object_name);
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END LOOP;
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IF cardinality(sequence_names) = 0 THEN
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RETURN;
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END IF;
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PERFORM master_drop_sequences(sequence_names);
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END;
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$cdbdt$;
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COMMENT ON FUNCTION pg_catalog.citus_drop_trigger()
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IS 'perform checks and actions at the end of DROP actions';
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