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Hi , We have a table wbxdata (xxxx…) partition by range(starttime) , and have a default partition, now we want to add a new partition and move the data from default partition to new added partition. Begin; Alter table only wbxdata … detach partition wbxdata_pdefault; ---from here, accessexclusive lock on wbxdata_pdefault default partition, and it block all query on parent table wbxdata.
Insert into wbxdata_p2305 select * from wbxdata_pdefault where starttime >= ‘2023-05-01 00:00:00’::date and starttime < ‘2023-06-01 00:00:00’; Delete from wbxdata_pdefault where starttime >= ‘2023-05-01 00:00:00’::date and starttime < ‘2023-06-01 00:00:00’; Alter table only wbxdata attach partition wbxdata_p2305 for values from ‘‘2023-05-01 00:00:00’ TO ‘2023-06-01 00:00:00’; Alter table attach default partition; End; Is it expected to see all query even select on parent table wbxdata got blocked , when detach default partition and attach default partition ? Postgresql 14.7 version. Thanks, James |
