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f89fd07c5b
This changes the license text for SQL files to be identical with the license text for C files.
53 lines
1.6 KiB
MySQL
53 lines
1.6 KiB
MySQL
-- This file and its contents are licensed under the Apache License 2.0.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-APACHE for a copy of the license.
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--parallel queries require big-ish tables so collect them all here
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--so that we need to generate queries only once.
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CREATE TABLE test (i int, j double precision, ts timestamp);
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--has to be big enough to force at least 2 workers below.
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INSERT INTO test SELECT x, x+0.1, _timescaledb_internal.to_timestamp(x*1000) FROM generate_series(1,1000000) AS x;
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SET client_min_messages = 'error';
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--avoid warning polluting output
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ANALYZE;
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RESET client_min_messages;
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SET force_parallel_mode = 'on';
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SET max_parallel_workers_per_gather = 4;
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EXPLAIN (costs off)
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SELECT first(i, j) FROM "test";
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SELECT first(i, j) FROM "test";
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EXPLAIN (costs off)
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SELECT last(i, j) FROM "test";
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SELECT last(i, j) FROM "test";
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EXPLAIN (costs off)
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SELECT time_bucket('1 second', ts) sec, last(i, j)
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FROM "test"
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GROUP BY sec
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ORDER BY sec
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LIMIT 5;
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SELECT time_bucket('1 second', ts) sec, last(i, j)
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FROM "test"
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GROUP BY sec
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ORDER BY sec
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LIMIT 5;
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--test variants of histogram
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EXPLAIN (costs off) SELECT histogram(i, 1, 1000000, 2) FROM "test";
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SELECT histogram(i, 1, 1000000, 2) FROM "test";
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EXPLAIN (costs off) SELECT histogram(i, 1,1000001,10) FROM "test";
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SELECT histogram(i, 1, 1000001, 10) FROM "test";
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EXPLAIN (costs off) SELECT histogram(i, 0,100000,5) FROM "test";
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SELECT histogram(i, 0, 100000, 5) FROM "test";
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EXPLAIN (costs off) SELECT histogram(i, 10,100000,5) FROM "test";
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SELECT histogram(i, 10, 100000, 5) FROM "test";
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