SHOW CREATE PLACEMENT POLICY
SHOW CREATE PLACEMENT POLICY 用于显示一个放置策略（placement policy）的定义。你可以使用它查看当前放置策略的定义，并在另一个 TiDB 集群中重新创建该策略。
语法
- ShowCreatePlacementPolicyStmt
- PolicyName
ShowCreatePlacementPolicyStmt ::=
"SHOW" "CREATE" "PLACEMENT" "POLICY" PolicyName
PolicyName ::=
Identifier
示例
CREATE PLACEMENT POLICY p1 PRIMARY_REGION="us-east-1" REGIONS="us-east-1,us-west-1" FOLLOWERS=4;
CREATE TABLE t1 (a INT) PLACEMENT POLICY=p1;
SHOW CREATE PLACEMENT POLICY p1\G
Query OK, 0 rows affected (0.08 sec)
Query OK, 0 rows affected (0.10 sec)
***************************[ 1. row ]***************************
Policy | p1
Create Policy | CREATE PLACEMENT POLICY `p1` PRIMARY_REGION="us-east-1" REGIONS="us-east-1,us-west-1" FOLLOWERS=4
1 row in set (0.00 sec)
MySQL 兼容性
该语句是 TiDB 对 MySQL 语法的扩展。