2016. 04. 07. 19:31 keltezéssel, 'Mark Rotteveel' [email protected] [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: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/
