Re: CREATE INDEX uses INDEX ?

Thanks.

Then,
Is it a good idea to run multiple instance of "create index on tableX" on
the same time ? Or is it better to do it sequentially ?
In other words : Can one seq scan on a table benefit to multiple create
index stmt on that table ?

Nicolas PARIS

2015-03-07 12:56 GMT+01:00 Guillaume Lelarge <guillaume(at)lelarge(dot)info>:

> Le 7 mars 2015 11:32, "Nicolas Paris" <niparisco(at)gmail(dot)com> a écrit :
> >
> > Hello,
> >
> > I wonder if the process of index creation can benefit from other indexes.
> >
>
> It cannot.
>
> > EG: Creating a partial index with predicat based on a boolean column,
> will use an hypothetic index on that boolean column or always use a seq
> scan on all rows ?
> >
>
> Nope, it always does a seqscan.
>
> > Goal is to create partial indexes faster.
> >
> > Explain command does not work with Create index.
> >
>
> You cannot use EXPLAIN on most DDL commands.
>