mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-20 16:50:48 +00:00
Update column.md
This commit is contained in:
parent
cbad45bd4f
commit
a3b63b86fa
@ -23,7 +23,7 @@ The following actions are supported:
|
||||
- [CLEAR COLUMN](#alter_clear-column) — Resets column values.
|
||||
- [COMMENT COLUMN](#alter_comment-column) — Adds a text comment to the column.
|
||||
- [MODIFY COLUMN](#alter_modify-column) — Changes column’s type, default expression and TTL.
|
||||
- [MODIFY REMOVE](#modify-remove) — Removes one of the column properties.
|
||||
- [MODIFY COLUMN REMOVE](#modify-remove) — Removes one of the column properties.
|
||||
|
||||
These actions are described in detail below.
|
||||
|
||||
@ -137,7 +137,7 @@ If there is a failure during one of the successive stages, data can be restored
|
||||
|
||||
The `ALTER` query for changing columns is replicated. The instructions are saved in ZooKeeper, then each replica applies them. All `ALTER` queries are run in the same order. The query waits for the appropriate actions to be completed on the other replicas. However, a query to change columns in a replicated table can be interrupted, and all actions will be performed asynchronously.
|
||||
|
||||
## MODIFY REMOVE {#modify-remove}
|
||||
## MODIFY COLUMN REMOVE {#modify-remove}
|
||||
|
||||
Removes one of the column properties: DEFAULT, ALIAS, MATERIALIZED, CODEC, COMMENT, TTL.
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user