如何获取分区边界

Question

我有Postgres 10+。假设我通过RANGE用几个分区创建了一个声明性分区表。

如何获取特定分区的边界？

Answer 1

边界存储在分区的relpartbound条目的pg_class列中。此查询显示所有分区的名称及其分区范围：

SELECT t.oid::regclass AS partition,
       pg_get_expr(t.relpartbound, t.oid) AS bounds
FROM pg_inherits AS i
   JOIN pg_class AS t ON t.oid = i.inhrelid
WHERE i.inhparent = 'partitioned_table'::regclass;