bdr.bdr_queued_commands is a BDR internal implementation table used for DDL replication. Do not modify this table directly.
Every DDL operation (except table/sequence drops) that's captured and
replicated is inserted in this table, as is every operation manually queued
bdr.bdr_queue_ddl_commands(). Inspecting this table
can be useful to determine what schema changes were made when and by whom.