BUG #16344: json_agg slow performance vs jsonb_agg, truncate table for master table with remote partition

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Тема BUG #16344: json_agg slow performance vs jsonb_agg, truncate table for master table with remote partition
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Msg-id 16344-edc88bfde0736876@postgresql.org
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The following bug has been logged on the website:

Bug reference:      16344
Logged by:          Hongyan (Heather) Zhang
Email address:      zhangh3@aetna.com
PostgreSQL version: 12.2
Operating system:   PostgreSQL 12.0 on x86_64-pc-linux-gnu, compiled
Description:

json_agg vs jsonb_agg for a partitioned table, I found json_agg
siginificantly slow (6 secs) as jsonb (2mins)
create table aggtab as select id, json_agg(col) from tab group by id

truncate table <master table of 2 partitions, 1 local, another remote>
error: <remote table> is not a table

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