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feat(partitioning): add configurable future_partitions buffer

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This commit is contained in:
Maksym Buz
2026-04-07 16:57:46 +00:00
parent f38e9677e5
commit ac8003ff08
2 changed files with 21 additions and 16 deletions
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19
postgresql/procedures/01_maintenance.sql
View File

@@ -52,10 +52,15 @@ BEGIN
v_partition_name := p_parent_table || '_p' || v_suffix;
IF NOT partitions.partition_exists(v_partition_name) THEN
BEGIN
EXECUTE format(
'CREATE TABLE %I.%I PARTITION OF %I.%I FOR VALUES FROM (%s) TO (%s)',
v_parent_schema, v_partition_name, v_parent_schema, p_parent_table, v_start_ts, v_end_ts
);
EXCEPTION WHEN invalid_object_definition THEN
-- Ignore overlap errors (e.g., when transitioning from daily to hourly partitioning)
RAISE NOTICE 'Partition % overlaps with an existing partition. Skipping.', v_partition_name;
END;
END IF;
END;
$$;
@@ -92,11 +97,11 @@ BEGIN
BEGIN
IF length(v_suffix) = 6 THEN -- YYYYMM
v_partition_date := to_timestamp(v_suffix || '01', 'YYYYMMDD') AT TIME ZONE 'UTC';
v_partition_date := timezone('UTC', to_timestamp(v_suffix || '01', 'YYYYMMDD')::timestamp without time zone);
ELSIF length(v_suffix) = 8 THEN -- YYYYMMDD
v_partition_date := to_timestamp(v_suffix, 'YYYYMMDD') AT TIME ZONE 'UTC';
v_partition_date := timezone('UTC', to_timestamp(v_suffix, 'YYYYMMDD')::timestamp without time zone);
ELSIF length(v_suffix) = 10 THEN -- YYYYMMDDHH
v_partition_date := to_timestamp(v_suffix, 'YYYYMMDDHH24') AT TIME ZONE 'UTC';
v_partition_date := timezone('UTC', to_timestamp(v_suffix, 'YYYYMMDDHH24')::timestamp without time zone);
ELSE
CONTINUE; -- Ignore non-matching suffix lengths
END IF;
@@ -153,25 +158,25 @@ DECLARE
BEGIN
IF p_period = 'day' THEN
v_period_interval := '1 day'::interval;
v_start_time := date_trunc('day', now() AT TIME ZONE 'UTC');
v_start_time := date_trunc('day', now(), 'UTC');
-- Calculate how many past days cover the retention period (86400 seconds = 1 day)
v_past_iterations := ceil(extract(epoch from p_keep_history) / 86400)::integer;
ELSIF p_period = 'week' THEN
v_period_interval := '1 week'::interval;
v_start_time := date_trunc('week', now() AT TIME ZONE 'UTC');
v_start_time := date_trunc('week', now(), 'UTC');
-- 604800 seconds = 1 week
v_past_iterations := ceil(extract(epoch from p_keep_history) / 604800)::integer;
ELSIF p_period = 'month' THEN
v_period_interval := '1 month'::interval;
v_start_time := date_trunc('month', now() AT TIME ZONE 'UTC');
v_start_time := date_trunc('month', now(), 'UTC');
-- Approximate 30 days per month (2592000 seconds)
v_past_iterations := ceil(extract(epoch from p_keep_history) / 2592000)::integer;
ELSIF p_period LIKE '%hour%' THEN
v_period_interval := p_period::interval;
v_start_time := date_trunc('hour', now() AT TIME ZONE 'UTC');
v_start_time := to_timestamp(floor(extract(epoch from now()) / extract(epoch from v_period_interval)) * extract(epoch from v_period_interval));
v_past_iterations := ceil(extract(epoch from p_keep_history) / extract(epoch from v_period_interval))::integer;
ELSE

10
postgresql/tests/docker/init_scripts/01_30_maintenance.sql
View File

@@ -90,7 +90,7 @@ BEGIN
BEGIN
IF length(v_suffix) = 6 THEN -- YYYYMM
v_partition_date := to_timestamp(v_suffix || '01', 'YYYYMMDD') AT TIME ZONE 'UTC';
v_partition_date := timezone('UTC', to_timestamp(v_suffix || '01', 'YYYYMMDD')::timestamp without time zone);
-- For monthly, we check if the END of the month is older than retention?
-- Or just strict retention.
-- To be safe, adding 1 month to check vs cutoff.
@@ -100,7 +100,7 @@ BEGIN
COMMIT; -- Release lock immediately
END IF;
ELSIF length(v_suffix) = 8 THEN -- YYYYMMDD
v_partition_date := to_timestamp(v_suffix, 'YYYYMMDD') AT TIME ZONE 'UTC';
v_partition_date := timezone('UTC', to_timestamp(v_suffix, 'YYYYMMDD')::timestamp without time zone);
IF extract(epoch from (v_partition_date + '1 day'::interval)) < v_cutoff_ts THEN
RAISE NOTICE 'Dropping old partition %', v_partition.partition_name;
EXECUTE format('DROP TABLE %I.%I', v_partition.partition_schema, v_partition.partition_name);
@@ -130,19 +130,19 @@ DECLARE
BEGIN
IF p_period = 'day' THEN
v_period_interval := '1 day'::interval;
v_start_time := date_trunc('day', now() AT TIME ZONE 'UTC');
v_start_time := date_trunc('day', now(), 'UTC');
-- Calculate how many past days cover the retention period (86400 seconds = 1 day)
v_past_iterations := ceil(extract(epoch from p_keep_history) / 86400)::integer;
ELSIF p_period = 'week' THEN
v_period_interval := '1 week'::interval;
v_start_time := date_trunc('week', now() AT TIME ZONE 'UTC');
v_start_time := date_trunc('week', now(), 'UTC');
-- 604800 seconds = 1 week
v_past_iterations := ceil(extract(epoch from p_keep_history) / 604800)::integer;
ELSIF p_period = 'month' THEN
v_period_interval := '1 month'::interval;
v_start_time := date_trunc('month', now() AT TIME ZONE 'UTC');
v_start_time := date_trunc('month', now(), 'UTC');
-- Approximate 30 days per month (2592000 seconds)
v_past_iterations := ceil(extract(epoch from p_keep_history) / 2592000)::integer;
ELSE