Re: Index creation

On Wed, 7 Jan 2004, Eric Jain wrote:

> Any tips for speeding up index creation?
>
> I need to bulk load a large table with 100M rows and several indexes,
> some of which span two columns.
>
> By dropping all indexes prior to issuing the 'copy from' command, the
> operation completes 10x as fast (1.5h vs 15h).
>
> Unfortunately, recreating a single index takes nearly as long as loading
> all of the data into the table; this more or less eliminates the time
> gained by dropping the index in the first place.
>
> Also, there doesn't seem to be a simple way to disable/recreate all
> indexes for a specific table short of explicitely dropping and later
> recreating each index?

Note that you can issue the following command to see all the index
definitions for a table:

select * from pg_indexes where tablename='sometable';

And store those elsewhere to be reused when you need to recreate the
index.