Re: Needless additional partition check in INSERT?

On 2018-Jun-09, David Rowley wrote:

> On 9 June 2018 at 03:24, Alvaro Herrera <alvherre@2ndquadrant.com> wrote:
> > I was also wondering about introducing a new function call in this path
> > where previously was none.  Given the amount of other stuff that's
> > happening when a tuple is inserted, I suppose it's not worth worrying
> > about in terms of making this an inline function in the header.
> 
> I wondered about that too. I've not tested it again, but I do have
> another patch locally which can about double the speed of COPY FROM
> for partitioned tables, so I have to admit I did gawk at the
> additional function call idea, but I'd rather see this fixed than on
> the shelf, so I went with it.
> 
> I'll leave it up to you to how you'd like to format the if statement.
> I've written it the way I'm happy with.

Truth is, the more I look at this, the more I think it should be done in
the way Amit Langote was proposing: do away with the extra function, and
check all those conditions inside ExecConstraints itself.  We can add a
new boolean tupleRouting argument, which I think is the only missing bit.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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