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Retrieve the compression settings for each chunk in the columnstore.
Since TimescaleDB v2.18.0To retrieve information about settings:
Show settings for all chunks in the columnstore:
SELECT * FROM timescaledb_information.chunk_columnstore_settingsReturns:
hypertable | chunk | segmentby | orderby------------+-------+-----------+---------measurements | _timescaledb_internal._hyper_1_1_chunk| | "time" DESC
Find all chunk columnstore settings for a specific hypertable:
SELECT *FROM timescaledb_information.chunk_columnstore_settingsWHERE hypertable::TEXT LIKE 'metrics';Returns:
hypertable | chunk | segmentby | orderby------------+-------+-----------+---------metrics | _timescaledb_internal._hyper_2_3_chunk | metric_id | "time"
Name | Type | Description | ||
---|---|---|---|---|
hypertable | REGCLASS | The name of the hypertable in the columnstore. | ||
chunk | REGCLASS | The name of the chunk in the hypertable . | ||
segmentby | TEXT | The list of columns used to segment the hypertable . | ||
orderby | TEXT | The list of columns used to order the data in the hypertable , along with the ordering and NULL ordering information. | ||
index | TEXT | The sparse index details. |
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