On 2018/08/17 12:26, Mathias Brossard wrote: > On Thu, Aug 16, 2018 at 12:46 AM Pavel Stehule <pavel.stehule@gmail.com> >> >> This is question - maybe we can support older partitioning based on only >> inheritance - and the query can be more exact on PostgreSQL 10 and newer. >> >> Please, send any patch. You are welcome. > > In my very humble opinion, I would restrict the definition of partitions to > declarative partitioning. My justification would be that partitions all use > inheritance, but not all inheritance is a partition (how would you handle > multiple inheritance). > > See patch attached that fails (in a way similar to other features) when > connected to servers with version earlier than 10.0.
The patch to add the pg_partition_tree() function was just committed:
Could one of you please revise the patch to use that function to produce the output of \dP+?
here it is.
It is based on Mathias's patch. Although we can use pg_partition_tree on PostgreSQL, we still should to support PostgreSQL 10, 11 where this function is not available
Regards
Pavel
Note that pg_partition_tree simply scans the underlying catalog to get all the tables, so if you pass it a table that's not partitioned (relkind == 'r'), but has inheritance children, the children will be returned in its output. So, if you want to limit the output of \dP to partitioned tables, be sure to include relkind = 'p' condition in the query.
