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.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
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