ClickHouse/docs/en/operations/system-tables/detached_parts.md

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slug: /en/operations/system-tables/detached_parts
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# detached_parts

Contains information about detached parts of [MergeTree](../../engines/table-engines/mergetree-family/mergetree.md) tables. The `reason` column specifies why the part was detached.

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.

For the description of other columns, see [system.parts](../../operations/system-tables/parts.md#system_tables-parts).

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).

[Original article](https://clickhouse.com/docs/en/operations/system-tables/detached_parts) <!--hide-->
add frontmatter dashes 2022-08-28 13:53:52 +00:00			`---`
add slugs 2022-08-28 13:58:27 +00:00			`slug: /en/operations/system-tables/detached_parts`
add frontmatter dashes 2022-08-28 13:53:52 +00:00			`---`
Remove H1 anchor tags from docs 2022-06-02 10:55:18 +00:00			`# detached_parts`
[docs] split aggregate function and system table references (#11742) * prefer relative links from root * wip * split aggregate function reference * split system tables 2020-06-18 08:24:31 +00:00
			Contains information about detached parts of [MergeTree](../../engines/table-engines/mergetree-family/mergetree.md) tables. The `reason` column specifies why the part was detached.

[docs] split the ALTER article (#12502) * initial split * initial adjust links * make en buildable * re-normalize 2020-07-14 21:02:41 +00:00			`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.`
[docs] split aggregate function and system table references (#11742) * prefer relative links from root * wip * split aggregate function reference * split system tables 2020-06-18 08:24:31 +00:00
[docs] split various kinds of CREATE queries into separate articles (#12328) * normalize * split & adjust links * re-normalize * adjust ru links * adjust ja/tr links * partially apply e0d19d2aeaeafa3620305bce3a991fefc0e28695 * reset contribs 2020-07-09 15:10:35 +00:00			`For the description of other columns, see [system.parts](../../operations/system-tables/parts.md#system_tables-parts).`
[docs] split aggregate function and system table references (#11742) * prefer relative links from root * wip * split aggregate function reference * split system tables 2020-06-18 08:24:31 +00:00
[docs] split the ALTER article (#12502) * initial split * initial adjust links * make en buildable * re-normalize 2020-07-14 21:02:41 +00:00			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).
DOCSUP-1915: Split system-table.md into separate files. (#13160) * Corrected en files * Split system-tables.md into separate files * Fixed links. * Fixed links. * Fixed links. * Fixed links. * Add ref to original article * Fixed links * Add toc_folder_title and translate * Add stack_trace.md, correct toc-title * Fixed links * Hypothesis testing * Hypothesis testing * Update run.sh, thanks @azat Co-authored-by: Anna Devyatova <annadevyatova@yandex-team.ru> Co-authored-by: Sergei Shtykov <bayonet@yandex-team.ru> Co-authored-by: alexey-milovidov <milovidov@yandex-team.ru> 2020-08-06 08:50:29 +00:00
find . -type f -name '*.md'\| xargs -I{} perl -pi -e 's\|https://clickhouse.tech\|https://clickhouse.com\|g' {} 2021-09-19 20:05:54 +00:00			`[Original article](https://clickhouse.com/docs/en/operations/system-tables/detached_parts) <!--hide-->`