2017-04-03 19:49:50 +00:00
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system.parts
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2017-04-26 17:37:55 +00:00
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Contains information about parts of a table in the MergeTree family.
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2017-04-03 19:49:50 +00:00
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2017-04-26 17:37:55 +00:00
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Columns:
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2017-04-03 19:49:50 +00:00
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::
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2017-04-26 17:37:55 +00:00
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database String - Name of the database where the table that this part belongs to is located.
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table String - Name of the table that this part belongs to.
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engine String - Name of the table engine, without parameters.
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partition String - Name of the partition, in the format YYYYMM.
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name String - Name of the part.
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replicated UInt8 - Whether the part belongs to replicated data.
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active UInt8 - Whether the part is used in a table, or is no longer needed and will be deleted soon. Inactive parts remain after merging.
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marks UInt64 - Number of marks - multiply by the index granularity (usually 8192) to get the approximate number of rows in the part.
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bytes UInt64 - Number of bytes when compressed.
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modification_time DateTime - Time the directory with the part was modified. Usually corresponds to the part's creation time.
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remove_time DateTime - For inactive parts only - the time when the part became inactive.
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refcount UInt32 - The number of places where the part is used. A value greater than 2 indicates that this part participates in queries or merges.
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