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a19be04d7b
When a MergeAppendPath has children that do not produce sorted output a Sort node will be injected during plan creation, those plans would trigger an error about invalid child nodes in ConstraintAwareAppend. This PR makes ConstraintAwareAppend handle those plans correctly.
70 lines
2.7 KiB
SQL
70 lines
2.7 KiB
SQL
-- This file and its contents are licensed under the Timescale License.
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-- Please see the included NOTICE for copyright information and
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-- LICENSE-TIMESCALE for a copy of the license.
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--TEST github issue 1650 character segment by column
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CREATE TABLE test_chartab ( job_run_id INTEGER NOT NULL, mac_id CHAR(16) NOT NULL, rtt INTEGER NOT NULL, ts TIMESTAMP(3) NOT NULL );
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SELECT create_hypertable('test_chartab', 'ts', chunk_time_interval => interval '1 day', migrate_data => true);
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insert into test_chartab
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values(8864, '0014070000006190' , 392 , '2019-12-14 02:52:05.863');
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insert into test_chartab
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values( 8864 , '0014070000011039' , 150 , '2019-12-14 02:52:05.863');
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insert into test_chartab
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values( 8864 , '001407000001DD2E' , 228 , '2019-12-14 02:52:05.863');
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insert into test_chartab
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values( 8890 , '001407000001DD2E' , 228 , '2019-12-20 02:52:05.863');
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ALTER TABLE test_chartab SET (timescaledb.compress, timescaledb.compress_segmentby = 'mac_id', timescaledb.compress_orderby = 'ts DESC');
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select * from test_chartab order by mac_id , ts limit 2;
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--compress the data and check --
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SELECT compress_chunk('_timescaledb_internal._hyper_1_1_chunk');
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select * from test_chartab order by mac_id , ts limit 2;
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SELECT compress_chunk('_timescaledb_internal._hyper_1_2_chunk');
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select * from test_chartab order by mac_id , ts limit 2;
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-- test constraintawareappend sort node handling
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SET enable_hashagg TO false;
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CREATE TABLE public.merge_sort (time timestamp NOT NULL, measure_id integer NOT NULL, device_id integer NOT NULL, value float);
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SELECT create_hypertable('merge_sort', 'time');
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ALTER TABLE merge_sort SET (timescaledb.compress = true, timescaledb.compress_orderby = 'time', timescaledb.compress_segmentby = 'device_id, measure_id');
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INSERT INTO merge_sort SELECT time, 1, 1, extract(epoch from time) * 0.001 FROM generate_series('2000-01-01'::timestamp,'2000-02-01'::timestamp,'1h'::interval) g1(time);
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ANALYZE merge_sort;
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--compress first chunk
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SELECT
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compress_chunk(c.schema_name || '.' || c.table_name)
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FROM _timescaledb_catalog.chunk c
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INNER JOIN _timescaledb_catalog.hypertable ht ON c.hypertable_id=ht.id
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WHERE ht.table_name = 'merge_sort'
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ORDER BY c.id LIMIT 1;
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-- this should have a MergeAppend with children wrapped in Sort nodes
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EXPLAIN (analyze,costs off,timing off,summary off) SELECT
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last(time, time) as time,
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device_id,
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measure_id,
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last(value, time) AS value
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FROM merge_sort
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WHERE time < now()
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GROUP BY 2, 3;
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-- this should exclude the decompressed chunk
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EXPLAIN (analyze,costs off,timing off,summary off) SELECT
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last(time, time) as time,
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device_id,
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measure_id,
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last(value, time) AS value
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FROM merge_sort
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WHERE time > '2000-01-10'::text::timestamp
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GROUP BY 2, 3;
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RESET enable_hashagg;
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