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Add info about DETACH DATABASE

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Dmitry Novik 2023-11-03 01:12:58 +01:00 committed by GitHub
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docs/en/sql-reference/statements/detach.md
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@ -5,7 +5,7 @@ sidebar_label: DETACH
title: "DETACH Statement"
---
Makes the server "forget" about the existence of a table, a materialized view, or a dictionary.
Makes the server "forget" about the existence of a table, a materialized view, a dictionary, or a database.
**Syntax**
@ -13,9 +13,9 @@ Makes the server "forget" about the existence of a table, a materialized view, o
DETACH TABLE|VIEW|DICTIONARY|DATABASE [IF EXISTS] [db.]name [ON CLUSTER cluster] [PERMANENTLY] [SYNC]
```
Detaching does not delete the data or metadata of a table, a materialized view or a dictionary. If an entity was not detached `PERMANENTLY`, on the next server launch the server will read the metadata and recall the table/view/dictionary again. If an entity was detached `PERMANENTLY`, there will be no automatic recall.
Detaching does not delete the data or metadata of a table, a materialized view, a dictionary or a database. If an entity was not detached `PERMANENTLY`, on the next server launch the server will read the metadata and recall the table/view/dictionary/database again. If an entity was detached `PERMANENTLY`, there will be no automatic recall.
Whether a table or a dictionary was detached permanently or not, in both cases you can reattach them using the [ATTACH](../../sql-reference/statements/attach.md) query.
Whether a table, a dictionary or a database was detached permanently or not, in both cases you can reattach them using the [ATTACH](../../sql-reference/statements/attach.md) query.
System log tables can be also attached back (e.g. `query_log`, `text_log`, etc). Other system tables can't be reattached. On the next server launch the server will recall those tables again.
`ATTACH MATERIALIZED VIEW` does not work with short syntax (without `SELECT`), but you can attach it using the `ATTACH TABLE` query.