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https://github.com/timescale/timescaledb.git
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9023de61db
Previously, each test set their own (although mostly the same) configuration for log output and error verbosity. This is now set globally in the test runner so that tests only need to set these configuration parameters if they need to override the defaults. The log verbosity is also reduced so that errors aren't generated with the line number of the source file that output the error. Line numbers in the output can break tests when upgrading to a new PostgreSQL version that outputs a different line number.
50 lines
2.6 KiB
SQL
50 lines
2.6 KiB
SQL
\o /dev/null
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\ir include/insert_two_partitions.sql
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\o
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SELECT * FROM PUBLIC."two_Partitions";
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EXPLAIN (verbose ON, costs off) SELECT * FROM PUBLIC."two_Partitions";
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\echo "The following queries should NOT scan two_Partitions._hyper_1_1_0_partition"
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EXPLAIN (verbose ON, costs off) SELECT * FROM PUBLIC."two_Partitions" WHERE device_id = 'dev20';
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EXPLAIN (verbose ON, costs off) SELECT * FROM PUBLIC."two_Partitions" WHERE device_id = 'dev'||'20';
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EXPLAIN (verbose ON, costs off) SELECT * FROM PUBLIC."two_Partitions" WHERE 'dev'||'20' = device_id;
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--TODO: handle this later?
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--EXPLAIN (verbose ON, costs off) SELECT * FROM "two_Partitions" WHERE device_id IN ('dev20', 'dev21');
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\echo "The following shows non-aggregated queries with time desc using merge append"
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EXPLAIN (verbose ON, costs off)SELECT * FROM PUBLIC."two_Partitions" ORDER BY "timeCustom" DESC NULLS LAST limit 2;
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--shows that more specific indexes are used if the WHERE clauses "match", uses the series_1 index here.
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EXPLAIN (verbose ON, costs off)SELECT * FROM PUBLIC."two_Partitions" WHERE series_1 IS NOT NULL ORDER BY "timeCustom" DESC NULLS LAST limit 2;
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--here the "match" is implication series_1 > 1 => series_1 IS NOT NULL
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EXPLAIN (verbose ON, costs off)SELECT * FROM PUBLIC."two_Partitions" WHERE series_1 > 1 ORDER BY "timeCustom" DESC NULLS LAST limit 2;
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--note that without time transform things work too
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EXPLAIN (verbose ON, costs off)SELECT "timeCustom" t, min(series_0) FROM PUBLIC."two_Partitions" GROUP BY t ORDER BY t DESC NULLS LAST limit 2;
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--TODO: time transform doesn't work
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EXPLAIN (verbose ON, costs off)SELECT "timeCustom"/10 t, min(series_0) FROM PUBLIC."two_Partitions" GROUP BY t ORDER BY t DESC NULLS LAST limit 2;
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EXPLAIN (verbose ON, costs off)SELECT "timeCustom"%10 t, min(series_0) FROM PUBLIC."two_Partitions" GROUP BY t ORDER BY t DESC NULLS LAST limit 2;
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--make table with timestamp. Test timestamp instead of int time.
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CREATE TABLE PUBLIC.hyper_1 (
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time TIMESTAMPTZ NOT NULL,
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series_0 DOUBLE PRECISION NULL,
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series_1 DOUBLE PRECISION NULL,
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series_2 DOUBLE PRECISION NULL
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);
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CREATE INDEX ON PUBLIC.hyper_1 (time DESC, series_0);
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SELECT * FROM create_hypertable('"public"."hyper_1"'::regclass, 'time'::name, number_partitions => 1, chunk_size_bytes=>100000);
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INSERT INTO hyper_1 SELECT to_timestamp(generate_series(0,10000)), random(), random(), random();
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--non-aggragated uses MergeAppend correctly
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EXPLAIN (verbose ON, costs off)SELECT * FROM hyper_1 ORDER BY "time" DESC limit 2;
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--TODO: aggregated with date_trunc doesn't work
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EXPLAIN (verbose ON, costs off)SELECT date_trunc('minute', time) t, min(series_0) FROM hyper_1 GROUP BY t ORDER BY t DESC limit 2;
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