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12 lines
822 B
Markdown
12 lines
822 B
Markdown
# detached_parts
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Contains information about detached parts of [MergeTree](../../engines/table-engines/mergetree-family/mergetree.md) tables. The `reason` column specifies why the part was detached.
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For user-detached parts, the reason is empty. Such parts can be attached with [ALTER TABLE ATTACH PARTITION\|PART](../../sql-reference/statements/alter/partition.md#alter_attach-partition) command.
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For the description of other columns, see [system.parts](../../operations/system-tables/parts.md#system_tables-parts).
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If part name is invalid, values of some columns may be `NULL`. Such parts can be deleted with [ALTER TABLE DROP DETACHED PART](../../sql-reference/statements/alter/partition.md#alter_drop-detached).
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[Original article](https://clickhouse.com/docs/en/operations/system-tables/detached_parts) <!--hide-->
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