SHOW CREATE PLACEMENT POLICY

SHOW CREATE PLACEMENT POLICY 语句可用于查看放置策略当前的定义，并在另一个 TiDB 集群中重新创建该策略。

语法图

  1. ShowCreatePlacementPolicyStmt ::=
  2.     "SHOW" "CREATE" "PLACEMENT" "POLICY" PolicyName
  4. PolicyName ::=
  5.     Identifier

示例

  1. CREATE PLACEMENT POLICY p1 PRIMARY_REGION="us-east-1" REGIONS="us-east-1,us-west-1" FOLLOWERS=4;
  2. CREATE TABLE t1 (a INT) PLACEMENT POLICY=p1;
  3. SHOW CREATE PLACEMENT POLICY p1\G;
  1. Query OK, 0 rows affected (0.08 sec)
  3. Query OK, 0 rows affected (0.10 sec)
  5. ***************************[ 1. row ]***************************
  6. Policy        | p1
  7. Create Policy | CREATE PLACEMENT POLICY `p1` PRIMARY_REGION="us-east-1" REGIONS="us-east-1,us-west-1" FOLLOWERS=4
  8. 1 row in set (0.00 sec)

MySQL 兼容性

该语句是 TiDB 对 MySQL 语法的扩展。

另请参阅