Re: Copying records from TABLE_A to TABLE_B (in the same database)

On 8/2/22 13:59, Rob Sargent wrote:
> On 8/2/22 12:51, 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
>>
>> Another option is to have a trigger on table_a
>> to automatically replay all DML on table_b
>>
>>
>> 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)
>>
>>
>>
> If you can get outside sql, the bulk copy facilities (CopyManager in java)
> is blindingly fast for me.

??

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