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393cc68057
Dont construct chunk names from internal catalog tables in tests but instead use show_chunks and the informational views.
113 lines
4.6 KiB
Plaintext
113 lines
4.6 KiB
Plaintext
-- 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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CREATE TABLE target (
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time TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP NOT NULL,
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value DOUBLE PRECISION NOT NULL,
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series_id BIGINT NOT NULL,
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partition_column TIMESTAMPTZ NOT NULL
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);
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SELECT table_name FROM create_hypertable(
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'target'::regclass,
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'partition_column'::name, chunk_time_interval=>interval '8 hours',
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create_default_indexes=> false);
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table_name
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------------
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target
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(1 row)
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-- enable compression
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ALTER TABLE target SET (
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timescaledb.compress,
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timescaledb.compress_segmentby = 'series_id',
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timescaledb.compress_orderby = 'partition_column, value'
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);
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SELECT '2022-10-10 14:33:44.1234+05:30' as start_date \gset
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INSERT INTO target (series_id, value, partition_column)
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SELECT s,1,t from generate_series(:'start_date'::timestamptz, :'start_date'::timestamptz + interval '1 day', '5m') t cross join
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generate_series(1,3, 1) s;
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-- compress chunks
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SELECT count(compress_chunk(ch)) FROM show_chunks('target') ch;
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count
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-------
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4
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(1 row)
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CREATE TABLE source (
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time TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP NOT NULL,
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value DOUBLE PRECISION NOT NULL,
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series_id BIGINT NOT NULL
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);
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SELECT table_name FROM create_hypertable(
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'source'::regclass,
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'time'::name, chunk_time_interval=>interval '6 hours',
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create_default_indexes=> false);
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table_name
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------------
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source
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(1 row)
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SELECT '2022-10-10 10:00:00.0123+05:30' as start_date \gset
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INSERT INTO source (time, series_id, value)
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SELECT t, s,1 from generate_series(:'start_date'::timestamptz, :'start_date'::timestamptz + interval '1 day', '5m') t cross join
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generate_series(1,2, 1) s;
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\set ON_ERROR_STOP 0
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-- Merge UPDATE on compressed hypertables should report error
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MERGE INTO target t
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USING source s
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ON t.value = s.value AND t.series_id = s.series_id
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WHEN MATCHED THEN
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UPDATE SET series_id = (t.series_id * 0.123);
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ERROR: The MERGE command with UPDATE/DELETE merge actions is not support on compressed hypertables
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-- Merge DELETE on compressed hypertables should report error
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MERGE INTO target t
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USING source s
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ON t.value = s.value AND t.series_id = s.series_id
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WHEN MATCHED THEN
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DELETE;
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ERROR: The MERGE command with UPDATE/DELETE merge actions is not support on compressed hypertables
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-- Merge UPDATE/INSERT on compressed hypertables should report error
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MERGE INTO target t
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USING source s
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ON t.value = s.value AND t.series_id = s.series_id
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WHEN MATCHED THEN
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UPDATE SET series_id = (t.series_id * 0.123)
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WHEN NOT MATCHED THEN
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INSERT VALUES ('2021-11-01 00:00:05'::timestamp with time zone, 5, 210, '2021-11-01 00:00:05'::timestamp with time zone);
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ERROR: The MERGE command with UPDATE/DELETE merge actions is not support on compressed hypertables
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-- Merge DELETE/INSERT on compressed hypertables should report error
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MERGE INTO target t
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USING source s
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ON t.value = s.value AND t.series_id = s.series_id
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WHEN MATCHED THEN
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DELETE
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WHEN NOT MATCHED THEN
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INSERT VALUES ('2021-11-01 00:00:05'::timestamp with time zone, 5, 210, '2021-11-01 00:00:05'::timestamp with time zone);
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ERROR: The MERGE command with UPDATE/DELETE merge actions is not support on compressed hypertables
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\set ON_ERROR_STOP 1
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-- total compressed chunks
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SELECT count(*) AS "total compressed_chunks", is_compressed FROM timescaledb_information.chunks WHERE
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hypertable_name = 'target' GROUP BY is_compressed;
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total compressed_chunks | is_compressed
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-------------------------+---------------
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4 | t
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(1 row)
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-- Merge INSERT on compressed hypertables should work
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MERGE INTO target t
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USING source s
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ON t.partition_column = s.time AND t.value = s.value
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WHEN NOT MATCHED THEN
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INSERT VALUES ('2021-11-01 00:00:05'::timestamp with time zone, 5, 210, '2021-11-01 00:00:05'::timestamp with time zone);
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-- you should notice 1 uncompressed chunk
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SELECT count(*) AS "total compressed_chunks", is_compressed FROM timescaledb_information.chunks WHERE
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hypertable_name = 'target' GROUP BY is_compressed;
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total compressed_chunks | is_compressed
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-------------------------+---------------
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1 | f
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4 | t
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(2 rows)
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DROP TABLE target;
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DROP TABLE source;
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