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From Yingyi Bu <>
Subject Re: Retain inputs on index-search
Date Fri, 16 Sep 2016 18:15:30 GMT
I'd like to join the discussion.


On Fri, Sep 16, 2016 at 10:47 AM, Steven Jacobs <> wrote:

> Hi,
> I have come across an issue where retainInputs is always set to false when
> creating an index search in the select case. This was because it was
> previously assumed that variables before the search don't need to be kept
> after the search. In the nonPure case, this assumption is wrong. I'm now
> looking at two possible solution:
> 1) Add specialization for nonPure cases to set retainInputs to true
> 2) Always set retainInputs to true. This has performance implications, as
> well as plan changes, since now a project will be added above the index
> search in most cases, and the index search operator will have extra fields
> attached to it's tuples (although in general this will be only single
> values).
> I wanted to meet with whoever is interested, to decide the best way to
> address this. If you are interested in joining the meeting, please reply.
> For now I'll tentatively set the meeting for Tuesday at 11 AM.
> Steven

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