Re: Insert performance with composite index

On Mon, Nov 01, 2010 at 02:57:56PM +0100, Cédric Villemain wrote:
> >   CONSTRAINT tableindex_pkey PRIMARY KEY (tableindex)
> > )
> > the index definition is
> > CREATE INDEX "PK_AT2"
> >   ON ABC
> >   USING btree
> >   (event, tableindex)
> > TABLESPACE sample;
>
> Indexing twice the same column is useless. (perhaps move your PK to
> the tablespace 'sample' is good too ?)

why do you say that?
these are not the same indexes and they serve different purposes.

Best regards,

depesz

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