mirror of
https://github.com/GreptimeTeam/greptimedb.git
synced 2026-10-21 11:22:31 +00:00
Sainath Singineedi
fbbc017be4
* feat: expose region min/max timestamp in region_statistics Signed-off-by: Sainath Singineedi <44405294+sainad2222@users.noreply.github.com> * test: cover region_statistic time range assembly and projected values Signed-off-by: Sainath Singineedi <44405294+sainad2222@users.noreply.github.com> --------- Signed-off-by: Sainath Singineedi <44405294+sainad2222@users.noreply.github.com>
67 lines
2.2 KiB
SQL
67 lines
2.2 KiB
SQL
USE public;
|
|
|
|
CREATE TABLE test (
|
|
a int primary key,
|
|
b string,
|
|
ts timestamp time index,
|
|
) PARTITION ON COLUMNS (a) (
|
|
a < 10,
|
|
a >= 10 AND a < 20,
|
|
a >= 20,
|
|
);
|
|
|
|
|
|
INSERT INTO test VALUES
|
|
(1, 'a', 1),
|
|
(11, 'b', 11),
|
|
(21, 'c', 21);
|
|
|
|
-- SQLNESS SLEEP 3s
|
|
-- SQLNESS REPLACE (\s+\d+\s+) <NUM>
|
|
-- For regions using different WAL implementations, the manifest size may vary.
|
|
-- The remote WAL implementation additionally stores a flushed entry ID when creating the manifest.
|
|
SELECT SUM(region_rows), SUM(written_bytes_since_open), SUM(query_cpu_time_millis),
|
|
SUM(query_scanned_bytes), SUM(memtable_size), SUM(sst_size), SUM(index_size)
|
|
FROM INFORMATION_SCHEMA.REGION_STATISTICS WHERE table_id
|
|
IN (SELECT TABLE_ID FROM INFORMATION_SCHEMA.TABLES WHERE table_name = 'test' and table_schema = 'public');
|
|
|
|
-- SQLNESS REPLACE (\s+\d+\s+) <NUM>
|
|
SELECT data_length, index_length, avg_row_length, table_rows FROM INFORMATION_SCHEMA.TABLES WHERE table_name = 'test';
|
|
|
|
DROP TABLE test;
|
|
|
|
-- The projected columns are millisecond-typed. A nanosecond time index proves
|
|
-- min_timestamp floors and max_timestamp ceils, so the reported window stays a
|
|
-- superset of the data and cannot hide a region from a time-bounded lookup.
|
|
CREATE TABLE precise (
|
|
a int primary key,
|
|
ts timestamp(9) time index,
|
|
);
|
|
|
|
-- 1500000ns = 1.5ms floors to 1ms; 3999999ns = 3.999999ms ceils to 4ms.
|
|
INSERT INTO precise VALUES
|
|
(1, 1500000),
|
|
(2, 2500000),
|
|
(3, 3999999);
|
|
|
|
-- SQLNESS SLEEP 3s
|
|
SELECT min_timestamp, max_timestamp
|
|
FROM INFORMATION_SCHEMA.REGION_STATISTICS WHERE table_id
|
|
IN (SELECT TABLE_ID FROM INFORMATION_SCHEMA.TABLES WHERE table_name = 'precise' and table_schema = 'public');
|
|
|
|
DROP TABLE precise;
|
|
|
|
-- A region with no rows has nothing to bound, so both ends stay NULL rather
|
|
-- than collapsing onto the epoch.
|
|
CREATE TABLE empty_region (
|
|
a int primary key,
|
|
ts timestamp time index,
|
|
);
|
|
|
|
-- SQLNESS SLEEP 3s
|
|
SELECT min_timestamp, max_timestamp
|
|
FROM INFORMATION_SCHEMA.REGION_STATISTICS WHERE table_id
|
|
IN (SELECT TABLE_ID FROM INFORMATION_SCHEMA.TABLES WHERE table_name = 'empty_region' and table_schema = 'public');
|
|
|
|
DROP TABLE empty_region;
|