|From:||Bruce Momjian <bruce(at)momjian(dot)us>|
|To:||Vaibhav Kaushal <vaibhavkaushal123(at)gmail(dot)com>|
|Subject:||Re: What do these terms mean in the SOURCE CODE?|
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Vaibhav Kaushal wrote:
> I am going through the Executor code and come across the following terms
> quite often. Can someone tell me what do they mean (in a few (may be a
> couple of) sentences)?
> 1. Scan State
> 2. Plan State
> 3. Tuple Projection
> 4. EState
> 5. Qual
> 6. Expression
> They sound quite ambiguous in the source code, specially when some of them
> already have terms which have multiple meanings.
Have you read src/backend/executor/README? It is hard to explain what
these mean without understanding the executor.
+ It's impossible for everything to be true. +
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