80 lines
4.4 KiB
SQL
80 lines
4.4 KiB
SQL
-- ============================================================================
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-- Reverts Zabbix partitioned tables back to standard non-partitioned tables.
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-- Existing partitioned tables will be renamed to *_part (data is preserved).
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-- ============================================================================
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DO $$
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DECLARE
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v_row record;
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v_table text;
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v_part_table text;
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v_schema text;
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BEGIN
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FOR v_row IN SELECT * FROM partitions.config LOOP
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v_table := v_row.table_name;
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v_part_table := v_table || '_part';
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-- Determine schema of the partitioned table
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SELECT n.nspname INTO v_schema
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FROM pg_class c
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JOIN pg_namespace n ON n.oid = c.relnamespace
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WHERE c.relname = v_table AND c.relkind = 'p' AND pg_table_is_visible(c.oid);
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IF v_schema IS NOT NULL THEN
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RAISE NOTICE 'Reverting partitioned table %...', v_table;
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-- 1. Rename existing partitioned table to *_part
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EXECUTE format('ALTER TABLE %I.%I RENAME TO %I', v_schema, v_table, v_part_table);
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-- 2. Create standard (unpartitioned) replacement table based on the structure
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IF v_table = 'auditlog' THEN
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-- For auditlog, we need to try and restore the original single-column PK (auditid) if possible
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EXECUTE format('CREATE TABLE %I.%I (LIKE %I.%I INCLUDING DEFAULTS INCLUDING COMMENTS)', v_schema, v_table, v_schema, v_part_table);
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BEGIN
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EXECUTE format('ALTER TABLE %I.%I ADD PRIMARY KEY (auditid)', v_schema, v_table);
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EXCEPTION WHEN others THEN
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RAISE WARNING 'Failed to create primary key on auditlog, might already exist or duplicates present.';
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END;
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_1 ON %I.%I (userid, clock)', v_schema, v_table);
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_2 ON %I.%I (clock)', v_schema, v_table);
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_3 ON %I.%I (resourcetype, resourceid)', v_schema, v_table);
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_4 ON %I.%I (recordsetid)', v_schema, v_table);
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_5 ON %I.%I (ip)', v_schema, v_table);
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ELSE
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-- For others, copy everything including indexes
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EXECUTE format('CREATE TABLE %I.%I (LIKE %I.%I INCLUDING ALL)', v_schema, v_table, v_schema, v_part_table);
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END IF;
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RAISE NOTICE 'SUCCESS: % reverted to default. Partitioned data stored in % (You can DROP TABLE % CASCADE; later).', v_table, v_part_table, v_part_table;
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ELSIF EXISTS (SELECT 1 FROM pg_class WHERE relname = v_table AND relkind = 'r' AND pg_table_is_visible(oid)) THEN
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RAISE NOTICE 'Table % is already a regular table. Skipping.', v_table;
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ELSE
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RAISE WARNING 'Partitioned table % not found!', v_table;
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END IF;
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END LOOP;
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-- Drop the housekeeper intercept trigger (dynamically determine schema for custom schema support)
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SELECT n.nspname INTO v_schema
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FROM pg_class c
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JOIN pg_namespace n ON n.oid = c.relnamespace
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WHERE c.relname = 'housekeeper' AND pg_table_is_visible(c.oid);
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IF v_schema IS NOT NULL THEN
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EXECUTE format('DROP TRIGGER IF EXISTS housekeeper_filter ON %I.housekeeper', v_schema);
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RAISE NOTICE 'Housekeeper intercept trigger removed from %.housekeeper', v_schema;
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ELSE
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RAISE WARNING 'housekeeper table not found — trigger removal skipped.';
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END IF;
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RAISE NOTICE '================================================================================';
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RAISE NOTICE 'Undo complete. Partitioned tables have been renamed to *_part.';
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RAISE NOTICE 'If you want to migrate your history back, you must do it manually:';
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RAISE NOTICE ' INSERT INTO history SELECT * FROM history_part;';
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RAISE NOTICE 'Once done, or if you do not need the data, drop the partitioned tables:';
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RAISE NOTICE ' DROP TABLE history_part CASCADE;';
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RAISE NOTICE 'After that, you can safely remove the partitions infrastructure:';
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RAISE NOTICE ' DROP SCHEMA partitions CASCADE;';
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RAISE NOTICE '================================================================================';
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END $$;
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