85 lines
4.5 KiB
SQL
85 lines
4.5 KiB
SQL
-- ============================================================================
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-- Converts standard Zabbix tables to Partitioned tables.
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-- WARNING: This renames existing tables to *_old.
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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_old_table text;
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v_pk_sql 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_old_table := v_table || '_old';
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-- Determine schema
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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 pg_table_is_visible(c.oid);
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IF 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 'Converting table % to partitioned table...', v_table;
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-- 1. Rename existing table
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EXECUTE format('ALTER TABLE %I.%I RENAME TO %I', v_schema, v_table, v_old_table);
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-- 2. Create new partitioned table (handling auditlog PK uniquely)
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IF v_table = 'auditlog' THEN
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EXECUTE format('CREATE TABLE %I.%I (LIKE %I.%I INCLUDING DEFAULTS INCLUDING COMMENTS) PARTITION BY RANGE (clock)', v_schema, v_table, v_schema, v_old_table);
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EXECUTE format('ALTER TABLE %I.%I ADD PRIMARY KEY (auditid, clock)', v_schema, v_table);
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_p_1 ON %I.%I (userid, clock)', v_schema, v_table);
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_p_2 ON %I.%I (clock)', v_schema, v_table);
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_p_3 ON %I.%I (resourcetype, resourceid)', v_schema, v_table);
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_p_4 ON %I.%I (recordsetid)', v_schema, v_table);
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EXECUTE format('CREATE INDEX IF NOT EXISTS auditlog_p_5 ON %I.%I (ip)', v_schema, v_table);
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ELSE
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EXECUTE format('CREATE TABLE %I.%I (LIKE %I.%I INCLUDING ALL) PARTITION BY RANGE (clock)', v_schema, v_table, v_schema, v_old_table);
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END IF;
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-- 3. Create initial partitions
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RAISE NOTICE 'Creating initial partitions for %...', v_table;
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CALL partitions.maintain_table(v_table, v_row.period, v_row.keep_history, v_row.future_partitions);
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-- Optional: Migrate existing data
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-- EXECUTE format('INSERT INTO %I.%I SELECT * FROM %I.%I', v_schema, v_table, v_schema, v_old_table);
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ELSIF EXISTS (SELECT 1 FROM pg_class WHERE relname = v_table AND relkind = 'p' AND pg_table_is_visible(oid)) THEN
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RAISE NOTICE 'Table % is already partitioned. Skipping conversion.', v_table;
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-- Just run maintenance for this specific table to ensure partitions exist
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CALL partitions.maintain_table(v_table, v_row.period, v_row.keep_history, v_row.future_partitions);
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ELSE
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RAISE WARNING 'Table % not found!', v_table;
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END IF;
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END LOOP;
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-- Attach trigger to housekeeper table to silently discard tasks for partitioned tables.
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-- Dynamically determine the schema of the housekeeper table to support custom schemas.
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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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EXECUTE format('CREATE TRIGGER housekeeper_filter BEFORE INSERT ON %I.housekeeper FOR EACH ROW EXECUTE FUNCTION partitions.housekeeper_insert_trigger()', v_schema);
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RAISE NOTICE 'Housekeeper intercept trigger installed on %.housekeeper', v_schema;
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ELSE
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RAISE WARNING 'housekeeper table not found — trigger NOT installed!';
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END IF;
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END $$;
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-- ==========================================================================
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-- IMPORTANT: If the Zabbix Server connects with a non-superuser (e.g., 'zabbix'),
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-- that user MUST have access to the partitions schema for the housekeeper trigger
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-- to work. Without these GRANTs, every INSERT into housekeeper will FAIL.
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-- Uncomment and adjust the username below:
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-- ==========================================================================
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-- GRANT USAGE ON SCHEMA partitions TO zabbix;
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-- GRANT SELECT ON partitions.config TO zabbix;
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