On 8/2/22 13:51, Thomas Kellerer wrote:
Ron schrieb am 02.08.2022 um 20:37:
AWS RDS Postgresql 12.10
There are no indices or constraints (except for NOT NULL) on table_a.
The two ways that I know are:
INSERT INTO table_a SELECT * FROM table_b;
and
\COPY table_a TO '/tmp/table_a.tsv' WITH (FORMAT BINARY);
\COPY table_b FROM '/tmp/table_a.tsv' WITH (FORMAT BINARY);
Is there a faster/better way?
The INSERT is most probably faster then \copy
That's what I figured, since COPY means moving data over the (admittedly
very fast) wire, onto disk, and then back over the wire into the new table.
Another option is to have a trigger on table_a
to automatically replay all DML on table_b
How would you originally populate it?
Logical replication might be another option.
Although I am not sure if that is even possible inside
the samme database.
I know it's tricky inside the same server
(between different databases)
--
Angular momentum makes the world go 'round.
