Re: Getting specific partition from the partition name

The pg_class column relpartbound contains an internal representation of the partition boundary, when applicable.

You can decompile it into the canonical text format with pg_get_expr( expr pg_node_tree, relation oid [, pretty boolean ] ) → text.

So:

    create table t(x int primary key) partition by list(x);
    create table u partition of t for values in (0,1);
    create table v partition of t for values in (2,3,4,5,6,7,8,9);
    select oid::regclass,pg_get_expr(relpartbound,oid) from pg_class where relkind='r' and relispartition;