mirror of
https://github.com/timescale/timescaledb.git
synced 2025-05-21 21:21:22 +08:00
e44e47ed88
The user should be able to add time dimensions using INTERVAL when the column type is TIMESTAMP/TIMESTAMPTZ/DATE, so this change adds that support. Additionally it adds some additional tests and checks for add_dimension, e.g., a nice error when the table is not a hypertable.
49 lines
1.4 KiB
SQL
49 lines
1.4 KiB
SQL
--parallel queries require big-ish tables so collect them all here
|
|
--so that we need to generate queries only once.
|
|
|
|
CREATE TABLE test (i int, j double precision, ts timestamp);
|
|
--has to be big enough to force at least 2 workers below.
|
|
INSERT INTO test SELECT x, x+0.1, _timescaledb_internal.to_timestamp(x*1000) FROM generate_series(1,1000000) AS x;
|
|
|
|
SET client_min_messages = 'error';
|
|
--avoid warning polluting output
|
|
ANALYZE;
|
|
RESET client_min_messages;
|
|
|
|
SET force_parallel_mode = 'on';
|
|
SET max_parallel_workers_per_gather = 4;
|
|
|
|
EXPLAIN (costs off)
|
|
SELECT first(i, j) FROM "test";
|
|
SELECT first(i, j) FROM "test";
|
|
|
|
EXPLAIN (costs off)
|
|
SELECT last(i, j) FROM "test";
|
|
SELECT last(i, j) FROM "test";
|
|
|
|
EXPLAIN (costs off)
|
|
SELECT time_bucket('1 second', ts) sec, last(i, j)
|
|
FROM "test"
|
|
GROUP BY sec
|
|
ORDER BY sec
|
|
LIMIT 5;
|
|
|
|
SELECT time_bucket('1 second', ts) sec, last(i, j)
|
|
FROM "test"
|
|
GROUP BY sec
|
|
ORDER BY sec
|
|
LIMIT 5;
|
|
|
|
--test variants of histogram
|
|
EXPLAIN (costs off) SELECT histogram(i, 1, 1000000, 2) FROM "test";
|
|
SELECT histogram(i, 1, 1000000, 2) FROM "test";
|
|
|
|
EXPLAIN (costs off) SELECT histogram(i, 1,1000001,10) FROM "test";
|
|
SELECT histogram(i, 1, 1000001, 10) FROM "test";
|
|
|
|
EXPLAIN (costs off) SELECT histogram(i, 0,100000,5) FROM "test";
|
|
SELECT histogram(i, 0, 100000, 5) FROM "test";
|
|
|
|
EXPLAIN (costs off) SELECT histogram(i, 10,100000,5) FROM "test";
|
|
SELECT histogram(i, 10, 100000, 5) FROM "test";
|