| From: | Greg Sabino Mullane <htamfids(at)gmail(dot)com> |
|---|---|
| To: | veem v <veema0000(at)gmail(dot)com> |
| Cc: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>, Ron Johnson <ronljohnsonjr(at)gmail(dot)com>, "Peter J(dot) Holzer" <hjp-pgsql(at)hjp(dot)at>, Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>, "pgsql-generallists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: How to do faster DML |
| Date: | 2024-02-15 16:16:50 |
| Message-ID: | CAKAnmmLYTVfeiwPKURKK3qWsWHm4Cbhc5+zBY=qTsw+5bcP=KQ@mail.gmail.com |
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| Lists: | pgsql-general |
>
> So as I also tested the same as you posted, there has been no change in
> "ctid" , when I altered the column data type from 'int' to 'bigint' in the
> table, so that means full table rewriting won't happen in such a scenario.
No it was definitely rewritten - do not depend on the ctid to verify that.
Take our word for it, or use* pg_relation_filenode('int_test');* before and
after, as well as *pg_relation_size('int_test')*;
Cheers,
Greg
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