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2a01ebca61
Previously, chunks could end up unaligned betweeen partitions if the chunk_time_interval was updated between chunk creations. Now there is a check when a chunk is created whether there is a chunk matching the time point in another partition and if there is, the new chunk is created with the same interval.
62 lines
2.6 KiB
SQL
62 lines
2.6 KiB
SQL
\ir include/create_single_db.sql
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CREATE TABLE chunk_test(
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time BIGINT,
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metric INTEGER,
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device_id TEXT
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);
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-- Test chunk closing/creation
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SELECT * FROM create_hypertable('chunk_test', 'time', 'device_id', 2, chunk_time_interval => 10);
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SELECT * FROM _timescaledb_catalog.hypertable;
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INSERT INTO chunk_test VALUES (1, 1, 'dev1'),
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(2, 2, 'dev2'),
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(45, 2, 'dev2'),
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(46, 2, 'dev2');
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SELECT * FROM set_chunk_time_interval('chunk_test', 40::bigint);
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INSERT INTO chunk_test VALUES(23, 3, 'dev3');
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SELECT * FROM chunk_test order by time, metric, device_id;
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SELECT * FROM _timescaledb_catalog.chunk;
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SELECT * FROM _timescaledb_catalog.hypertable;
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SELECT * FROM ONLY chunk_test;
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SELECT * FROM _timescaledb_catalog.chunk c
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LEFT JOIN _timescaledb_catalog.partition p ON (p.id = c.partition_id)
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LEFT JOIN _timescaledb_catalog.partition_epoch pe ON (pe.id = p.epoch_id)
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LEFT JOIN _timescaledb_catalog.hypertable h ON (pe.hypertable_id = h.id)
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WHERE h.schema_name = 'public' AND h.table_name = 'chunk_test'
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ORDER BY c.id;
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-- Test chunk aligning between partitions
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CREATE TABLE chunk_align_test(
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time BIGINT,
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metric INTEGER,
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device_id TEXT
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);
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SELECT * FROM create_hypertable('chunk_align_test', 'time', 'device_id', 2, chunk_time_interval => 10);
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INSERT INTO chunk_align_test VALUES (1, 1, 'dev1'); -- this should create a 10 wide chunk
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SELECT c.id,partition_id,c.start_time,c.end_time,h.table_name,p.epoch_id FROM _timescaledb_catalog.chunk c
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LEFT JOIN _timescaledb_catalog.partition p ON (p.id = c.partition_id)
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LEFT JOIN _timescaledb_catalog.partition_epoch pe ON (pe.id = p.epoch_id)
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LEFT JOIN _timescaledb_catalog.hypertable h ON (pe.hypertable_id = h.id)
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WHERE h.schema_name = 'public' AND h.table_name = 'chunk_align_test'
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ORDER BY c.id;
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SELECT * FROM set_chunk_time_interval('chunk_align_test', 40::bigint);
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INSERT INTO chunk_align_test VALUES (5, 1, 'dev2'); -- this should still create a 10 wide chunk
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INSERT INTO chunk_align_test VALUES (45, 1, 'dev2'); -- this should create a 40 wide chunk
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SELECT c.id,partition_id,c.start_time,c.end_time,h.table_name,p.epoch_id FROM _timescaledb_catalog.chunk c
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LEFT JOIN _timescaledb_catalog.partition p ON (p.id = c.partition_id)
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LEFT JOIN _timescaledb_catalog.partition_epoch pe ON (pe.id = p.epoch_id)
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LEFT JOIN _timescaledb_catalog.hypertable h ON (pe.hypertable_id = h.id)
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WHERE h.schema_name = 'public' AND h.table_name = 'chunk_align_test'
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ORDER BY c.id;
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