greptimedb/tests/cases/distributed/information_schema/ssts_limit.sql

CREATE TABLE ssts_limit_case (
  a INT PRIMARY KEY INVERTED INDEX,
  b STRING SKIPPING INDEX,
  c STRING FULLTEXT INDEX,
  ts TIMESTAMP TIME INDEX,
)
PARTITION ON COLUMNS (a) (
  a < 1000,
  a >= 1000 AND a < 2000,
  a >= 2000
);

INSERT INTO ssts_limit_case VALUES
  (500, 'a', 'a', 1),
  (1500, 'b', 'b', 2),
  (2500, 'c', 'c', 3);

ADMIN FLUSH_TABLE('ssts_limit_case');

SELECT COUNT(DISTINCT node_id) > 1 AS has_multi_datanodes
FROM information_schema.ssts_manifest;

SELECT COUNT(*) AS limited_rows
FROM (
  SELECT region_id
  FROM information_schema.ssts_manifest
  LIMIT 1
);

SELECT COUNT(*) AS filtered_limited_rows
FROM (
  SELECT region_id
  FROM information_schema.ssts_manifest
  WHERE region_id > 0
  LIMIT 1
);

-- SQLNESS REPLACE (RepartitionExec:.*) RepartitionExec: REDACTED
EXPLAIN SELECT COUNT(*) AS filtered_limited_rows
FROM (
  SELECT region_id
  FROM information_schema.ssts_manifest
  WHERE table_id > 0
  LIMIT 1
);

-- The frontend orders results from all datanodes before applying the global offset.
SELECT min_ts, max_ts
FROM information_schema.ssts_manifest
WHERE region_id > 0
ORDER BY min_ts DESC
LIMIT 2 OFFSET 1;

-- SQLNESS REPLACE (RepartitionExec:.*) RepartitionExec: REDACTED
EXPLAIN SELECT min_ts
FROM information_schema.ssts_manifest
WHERE region_id > 0
ORDER BY min_ts DESC
LIMIT 1;

-- Timestamp filtering happens before global ordering and offset. The sort key
-- must remain available even when it is absent from the output projection.
SELECT max_ts
FROM information_schema.ssts_manifest
WHERE region_id > 0 AND min_ts >= '1970-01-01T00:00:00.002Z'::TIMESTAMP_NS
ORDER BY min_ts DESC
LIMIT 1 OFFSET 1;

DROP TABLE ssts_limit_case;