如何检索分区边界

Question

我有 postgres 10+。假设我创建了一个声明性分区 table by RANGE 和多个分区。

如何检索特定分区的边界？

Answer 1

边界存储在分区的 pg_class 条目的 relpartbound 列中。此查询打印所有分区的名称及其分区边界：

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;