Обсуждение: COPY and partitioning
Hi I understand v8.1 implements table partitioning. Very exciting! I have a big table (30 G) that is a real headache. I'd like to partition it. My plan is the following: (1) use pg_dump -t to dump the data; (2) create a partitioning schema with check constraints; and (3) repopulate using the COPY utility. My question: does the COPY utility consult check constraints before populating tables? Thanks as always.
Thinking about dumping the schema, rewriting that structure with your partitioning needs, and after copy the data.
Why not?
Just 2 cents, never done it.
to dump a schema:
pg_dump -s dbname > dbname.schema
Then just restore the data, it should work I guess.
Best regards,
Guido
On 11/17/05, Colton A Smith <smith@cs.utk.edu> wrote:
Hi
I understand v8.1 implements table partitioning. Very exciting!
I have a big table (30 G) that is a real headache. I'd like to
partition it. My plan is the following: (1) use pg_dump -t to
dump the data; (2) create a partitioning schema with check constraints;
and (3) repopulate using the COPY utility.
My question: does the COPY utility consult check constraints
before populating tables?
Thanks as always.
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On Thu, 2005-11-17 at 09:55 -0500, Colton A Smith wrote: > My question: does the COPY utility consult check constraints > before populating tables? No. I'd dump it piece by piece using a WHERE clause exactly the same as the constraints you will use, then reload using COPY into the partitions. Best Regards, Simon Riggs