mirror of
https://github.com/timescale/timescaledb.git
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500563ffe5
The extension now works with PostgreSQL 10, while retaining compatibility with version 9.6. PostgreSQL 10 has numerous internal changes to functions and APIs, which necessitates various glue code and compatibility wrappers to seamlessly retain backwards compatiblity with older versions. Test output might also differ between versions. In particular, the psql client generates version-specific output with `\d` and EXPLAINs might differ due to new query optimizations. The test suite has been modified as follows to handle these issues. First, tests now use version-independent functions to query system catalogs instead of using `\d`. Second, changes have been made to the test suite to be able to verify some test outputs against version-dependent reference files.
49 lines
1.4 KiB
MySQL
49 lines
1.4 KiB
MySQL
--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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