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51821b3709
Applying triggers to chunks requires taking the definition of a trigger on a hypertable and executing it on a chunk. Previously this was done with string replacement in the trigger definition. This was not especially safe, and thus we moved the logic to C where we can do proper parsing/deparsing and replacement of the table name. Another positive aspect is that we got rid of some DDL triggers.
68 lines
2.8 KiB
PL/PgSQL
68 lines
2.8 KiB
PL/PgSQL
--NOTICE: UPGRADE-SCRIPT-NEEDED contents in this file are not auto-upgraded. setup_main will be redefined
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--but not re-run so changes need to be included in upgrade scripts.
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CREATE OR REPLACE FUNCTION _timescaledb_internal.setup_main(restore BOOLEAN = FALSE)
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RETURNS void LANGUAGE PLPGSQL AS
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$BODY$
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DECLARE
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table_name NAME;
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BEGIN
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DROP TRIGGER IF EXISTS trigger_main_on_change_chunk_index
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ON _timescaledb_catalog.chunk_index;
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CREATE TRIGGER trigger_main_on_change_chunk_index
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AFTER INSERT OR UPDATE OR DELETE ON _timescaledb_catalog.chunk_index
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FOR EACH ROW EXECUTE PROCEDURE _timescaledb_internal.on_change_chunk_index();
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-- no DELETE: it would be a no-op
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DROP TRIGGER IF EXISTS trigger_1_main_on_change_hypertable
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ON _timescaledb_catalog.hypertable;
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CREATE TRIGGER trigger_1_main_on_change_hypertable
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AFTER INSERT OR UPDATE OR DELETE ON _timescaledb_catalog.hypertable
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FOR EACH ROW EXECUTE PROCEDURE _timescaledb_internal.on_change_hypertable();
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-- no DELETE: it would be a no-op
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DROP TRIGGER IF EXISTS trigger_main_on_change_hypertable_index
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ON _timescaledb_catalog.hypertable_index;
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CREATE TRIGGER trigger_main_on_change_hypertable_index
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AFTER INSERT OR UPDATE OR DELETE ON _timescaledb_catalog.hypertable_index
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FOR EACH ROW EXECUTE PROCEDURE _timescaledb_internal.on_change_hypertable_index();
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-- No support for TRUNCATE currently, so have a trigger to prevent it on
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-- all meta tables.
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FOREACH table_name IN ARRAY ARRAY ['hypertable', 'hypertable_index',
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'dimension', 'dimension_slice', 'chunk_constraint'] :: NAME [] LOOP
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EXECUTE format(
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$$
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DROP TRIGGER IF EXISTS trigger_block_truncate ON _timescaledb_catalog.%1$s;
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CREATE TRIGGER trigger_block_truncate
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BEFORE TRUNCATE ON _timescaledb_catalog.%1$s
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FOR EACH STATEMENT EXECUTE PROCEDURE _timescaledb_internal.on_truncate_block();
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$$, table_name);
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END LOOP;
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CREATE EVENT TRIGGER ddl_create_index ON ddl_command_end
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WHEN tag IN ('create index')
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EXECUTE PROCEDURE _timescaledb_internal.ddl_process_create_index();
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CREATE EVENT TRIGGER ddl_alter_index ON ddl_command_end
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WHEN tag IN ('alter index')
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EXECUTE PROCEDURE _timescaledb_internal.ddl_process_alter_index();
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CREATE EVENT TRIGGER ddl_drop_index ON sql_drop
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WHEN tag IN ('drop index')
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EXECUTE PROCEDURE _timescaledb_internal.ddl_process_drop_index();
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IF restore THEN
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ALTER EXTENSION timescaledb ADD EVENT TRIGGER ddl_create_index;
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ALTER EXTENSION timescaledb ADD EVENT TRIGGER ddl_alter_index;
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ALTER EXTENSION timescaledb ADD EVENT TRIGGER ddl_drop_index;
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END IF;
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END
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$BODY$
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SET client_min_messages = WARNING -- supress notices for trigger drops
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;
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