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Merge branch 'release-5.3' into translate/docs-cn-11669
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Oreoxmt authored Dec 21, 2023
2 parents cd9695c + d9c0eac commit 03de1e1
Showing 1 changed file with 3 additions and 3 deletions.
6 changes: 3 additions & 3 deletions system-variables.md
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Expand Up @@ -718,9 +718,9 @@ Constraint checking is always performed in place for pessimistic transactions (d
- Type: Boolean
- Default value: `OFF`
- This variable is used to control whether multiple columns or indexes can be altered in one `ALTER TABLE` statement. When the value of this variable is `ON`, only the following multi-schema changes are supported:
- Add multiple columns. For example, `ATLER TABLE t ADD COLUMN c1 INT, ADD COLUMN c2 INT;`.
- Drop multiple columns. For example, `ATLER TABLE t DROP COLUMN c1, DROP COLUMN c2;`.
- Drop multiple indexes. For example, `ATLER TABLE t DROP INDEX i1, DROP INDEX i2;`.
- Add multiple columns. For example, `ALTER TABLE t ADD COLUMN c1 INT, ADD COLUMN c2 INT;`.
- Drop multiple columns. For example, `ALTER TABLE t DROP COLUMN c1, DROP COLUMN c2;`.
- Drop multiple indexes. For example, `ALTER TABLE t DROP INDEX i1, DROP INDEX i2;`.
- Drop a column covered by a single-column index. For example, `ALTER TABLE t DROP COLUMN c1`, in which the schema contains `INDEX idx(c1)`.
### tidb_enable_cascades_planner
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