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https://github.com/timescale/timescaledb.git
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84f0c8977e
This change fixes the `plan_expand_hypertable` test, which was broken and never ran the output comparison due to prematurely ending in an uncaught error. The test appeared to succeeded, however, since also the broken test "expected" files were committed to the repo. Fixing the test revealed that the query output with our optimizations enabled is incorrect for outer joins (i.e., the output from the query differed from regular PostgreSQL). Restriction clauses were too aggressively pushed down to outer relations, leading to chunk exclusion when it shouldn't happen. This incorrect behavior has also been fixed.
44 lines
3.2 KiB
SQL
44 lines
3.2 KiB
SQL
-- 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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--we want to see how our logic excludes chunks
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--and not how much work constraint_exclusion does
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SET constraint_exclusion = 'off';
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:PREFIX SELECT * FROM hyper ORDER BY value;
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-- explicit chunk exclusion
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:PREFIX SELECT * FROM hyper WHERE _timescaledb_internal.chunks_in(hyper, ARRAY[1,2]) ORDER BY value;
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:PREFIX SELECT * FROM (SELECT * FROM hyper h WHERE _timescaledb_internal.chunks_in(h, ARRAY[1,2,3])) T ORDER BY value;
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:PREFIX SELECT * FROM hyper WHERE _timescaledb_internal.chunks_in(hyper, ARRAY[1,2,3]) AND time < 10 ORDER BY value;
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:PREFIX SELECT * FROM hyper_ts WHERE device_id = 'dev1' AND time < to_timestamp(10) AND _timescaledb_internal.chunks_in(hyper_ts, ARRAY[116]) ORDER BY value;
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:PREFIX SELECT * FROM hyper_ts h JOIN tag on (h.tag_id = tag.id ) WHERE _timescaledb_internal.chunks_in(h, ARRAY[116]) AND time < to_timestamp(10) AND device_id = 'dev1' ORDER BY value;
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:PREFIX SELECT * FROM hyper_w_space h1 JOIN hyper_ts h2 ON h1.device_id=h2.device_id WHERE _timescaledb_internal.chunks_in(h1, ARRAY[104,105]) AND _timescaledb_internal.chunks_in(h2, ARRAY[116,117]) ORDER BY h1.value;
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:PREFIX SELECT * FROM hyper_w_space h1 JOIN hyper_ts h2 ON h1.device_id=h2.device_id AND _timescaledb_internal.chunks_in(h2, ARRAY[116,117]) WHERE _timescaledb_internal.chunks_in(h1, ARRAY[104,105]) ORDER BY h1.value;
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:PREFIX SELECT * FROM hyper h1, hyper h2 WHERE _timescaledb_internal.chunks_in(h1, ARRAY[1,2]) AND _timescaledb_internal.chunks_in(h2, ARRAY[2,3]);
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SET enable_seqscan=false;
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-- Should perform index-only scan. Since we pass whole row into the function it might block planner from using index-only scan.
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-- But since we'll remove the function from the query tree before planner decision it shouldn't affect index-only decision.
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:PREFIX SELECT time FROM hyper WHERE time=0 AND _timescaledb_internal.chunks_in(hyper, ARRAY[1]);
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:PREFIX SELECT first(value, time) FROM hyper h WHERE _timescaledb_internal.chunks_in(h, ARRAY[1]);
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\set ON_ERROR_STOP 0
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SELECT * FROM hyper WHERE _timescaledb_internal.chunks_in(hyper, ARRAY[1,2]) AND _timescaledb_internal.chunks_in(hyper, ARRAY[2,3]);
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SELECT * FROM hyper WHERE _timescaledb_internal.chunks_in(2, ARRAY[1]);
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SELECT * FROM hyper WHERE time < 10 OR _timescaledb_internal.chunks_in(hyper, ARRAY[1,2]);
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SELECT _timescaledb_internal.chunks_in(hyper, ARRAY[1,2]) FROM hyper;
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-- non existing chunk id
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SELECT * FROM hyper WHERE _timescaledb_internal.chunks_in(hyper, ARRAY[123456789]);
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-- chunk that belongs to another hypertable
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SELECT * FROM hyper WHERE _timescaledb_internal.chunks_in(hyper, ARRAY[104]);
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-- passing wrong row ref
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SELECT * FROM hyper WHERE _timescaledb_internal.chunks_in(ROW(1,2), ARRAY[104]);
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-- passing func as chunk id
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SELECT * FROM hyper h WHERE _timescaledb_internal.chunks_in(h, array_append(ARRAY[1],current_setting('server_version_num')::int));
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-- NULL chunk IDs not allowed in chunk array
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SELECT * FROM hyper h WHERE _timescaledb_internal.chunks_in(h, ARRAY[NULL::int]);
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\set ON_ERROR_STOP 1
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-- chunks_in is STRICT function and for NULL arguments a null result is returned
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SELECT * FROM hyper h WHERE _timescaledb_internal.chunks_in(h, NULL);
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