Re: [firebird-support] VIEW optimization

2016. 04. 07. 19:31 keltezéssel, 'Mark Rotteveel' mark@lawinegevaar.nl
[firebird-support] írta:
>
>
> For a join (inner join), the rows must exist in both tables, so both
> tables need to be evaluated.
>
> Mark

I understand this. Try describe my problem with other words.
Is the VIEW an atomic (or compiled like a STORED PROCEDURE) thing?
I have a VIEW with 4 fields (FIELD1..4), 1 come from the "FROM table"
(FIELD1) and 3 from JOINs (FIELD2..4). If execute a SELECT FIELD1 FROM
... PLAN contains the JOINs. Why? If I write a SELECT manually not
include JOINs if not needed for the resulted fields, because want
maximum performance.

Gabor


------------------------------------

------------------------------------

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Visit http://www.firebirdsql.org and click the Documentation item
on the main (top) menu. Try FAQ and other links from the left-side menu there.

Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
------------------------------------

Yahoo Groups Links

<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/firebird-support/

<*> Your email settings:
Individual Email | Traditional

<*> To change settings online go to:
http://groups.yahoo.com/group/firebird-support/join
(Yahoo! ID required)

<*> To change settings via email:
firebird-support-digest@yahoogroups.com
firebird-support-fullfeatured@yahoogroups.com

<*> To unsubscribe from this group, send an email to:
firebird-support-unsubscribe@yahoogroups.com

<*> Your use of Yahoo Groups is subject to:
https://info.yahoo.com/legal/us/yahoo/utos/terms/