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32cb4a6af8
This patch adds support for the tableoid system column to transparent decompression. tableoid will be the relid of the uncompressed chunk. All other system columns will still throw an error when queried.
32 lines
1.7 KiB
SQL
32 lines
1.7 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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SET work_mem TO '50MB';
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-- for ordered append tests on compressed chunks we need a hypertable with time as compress_orderby column
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CREATE TABLE metrics_ordered(time timestamptz NOT NULL, device_id int, device_id_peer int, v0 int, v1 int, v2 float, v3 float);
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SELECT create_hypertable('metrics_ordered','time');
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ALTER TABLE metrics_ordered SET (timescaledb.compress, timescaledb.compress_orderby='time DESC',timescaledb.compress_segmentby='device_id,device_id_peer');
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INSERT INTO metrics_ordered SELECT * FROM metrics;
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CREATE INDEX ON metrics_ordered(device_id,device_id_peer,time);
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CREATE INDEX ON metrics_ordered(device_id,time);
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CREATE INDEX ON metrics_ordered(device_id_peer,time);
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-- compress all chunks
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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 = 'metrics_ordered'
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ORDER BY c.id;
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-- should not have ordered DecompressChunk path because segmentby columns are not part of pathkeys
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:PREFIX SELECT * FROM metrics_ordered ORDER BY time DESC LIMIT 10;
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-- should have ordered DecompressChunk path because segmentby columns have equality constraints
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:PREFIX SELECT * FROM metrics_ordered WHERE device_id = 1 AND device_id_peer = 3 ORDER BY time DESC LIMIT 10;
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:PREFIX SELECT DISTINCT ON (d.device_id) * FROM metrics_ordered d INNER JOIN LATERAL (SELECT * FROM metrics_ordered m WHERE m.device_id=d.device_id AND m.device_id_peer = 3 ORDER BY time DESC LIMIT 1 ) m ON true;
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