Hello In commit 898e5e3290a72d288923260143930fb32036c00c [1] we lowered the lock level on the parent relation. I found in discussion [2]:
> David Rowley recently pointed out that we can modify > CREATE TABLE .. PARTITION OF to likewise not obtain AEL anymore. > Apparently it just requires removal of three lines in MergeAttributes. But on current HEAD "create table ... partition of" still require AccessExclusiveLock on the parent relation. It's neccessary? regards, Sergei [1]: https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=898e5e3290a72d288923260143930fb32036c00c [2]: https://www.postgresql.org/message-id/20181025202622.d3x4y4ch7m4pxwnn%40alvherre.pgsql
