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Re: numbering plan nodes - Mailing list pgsql-hackers

From Simon Riggs
Subject Re: numbering plan nodes
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Msg-id CANP8+j+5cCpZk68QLSUJUemcuj1WPv12RmmFgBca-aCadW22Kw@mail.gmail.com
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In response to numbering plan nodes  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: numbering plan nodes  (Robert Haas <robertmhaas@gmail.com>)
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On 17 September 2015 at 13:14, Robert Haas <robertmhaas@gmail.com> wrote:
 
My main concern with this design is how future-proof it is.

Passing array offsets sounds brittle to me.

It would screw up any attempts to post-process the plans. Later enhancements seem certain to break that scheme.

It also assumes that all actors have access to a single memory structure that describes everything.

Hopefully we are working on a parallel query system that will work intranode as well as across nodes, so access to memory should not be assumed.

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Simon Riggs                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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