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Re: How to look at the Expression Trees - Mailing list pgsql-hackers

From Heikki Linnakangas
Subject Re: How to look at the Expression Trees
Date
Msg-id 4D88589D.6030505@enterprisedb.com
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In response to Re: How to look at the Expression Trees  (Vaibhav Kaushal <vaibhavkaushal123@gmail.com>)
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On 22.03.2011 05:39, Vaibhav Kaushal wrote:
> You said:
>
> ExecMakeFunctionResultNoSets is used to evaluate function calls.
>
> What are the 'functions' there? Are they the user supplied pl/PGSQL style
> user functions, the functions handled by fmgr or are they just another C
> function which make the Expression Evaluator?

Functions you can use in queries, written in PL/pgSQL or other PL 
languages. Including user-defined and built-in functions, and functions 
implementing operators.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com

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