ViewCriteria Vs BindVariables Vs whereclause: HELP!
Hey ppl,I don't know if this question has been addressed before, I promise you that I did a good amount of research on the forum, impossible to find a convincing answer.
My question is what is the most effective approach by using the objects from view of the interrogation. I mean, when I need to change the existing when the results in clause to beautify my rank. The way I see there are 2 options:
(1) I put a where clause with bind variable clause
(2) I work using criteria from view.
What I understand so far:
I know for a fact that bind variables are extremely effective and are almost always the right thing to do. But, my question is how effective uses the criteria of comparison view. I tried to go through the documentation of viewcriteria, but can't find anything convincing. The way I see if you frequently have a change where clause (as in the clause itself whole seems to change not only the value of the parameter whereclause, you add additional variables to be queried against), view criteria is the way to go, but if you have the same where clause to be changed, but each only once the value of the variable changes We do a setwhereclause with bind variables.
Questions I would like to know the answers for (and would be grateful for the "answering machine"):
(a) "usually", which is the best way? See criteria or adjustment whereclause with whereclauseparams? or is it too loose a question deserves an honest answer?
(b) here is another big question, is it possible to use meet the criteria of display bind variables? I tried, but couldn't.
I use Jdev 10.1.2 versions and 10.3.2, have not made the move to 11 again.
Hello
"A corollary of the view criteria feature described above is that whenever you apply a new view criteria (or delete an existing one), the text of the view object SQL query is actually changed. Changing the SQL query causes the database to re - analyze the statement the next time it is executed. "If you plan to use the criteria for view filtering feature to apply values of different for basically the same criteria criteria assigns each time, you will get better performance by using a view object whose WHERE clause contains named bind variables as described in Section 5.9,"with the help of named Bind Variables.
See: http://download-uk.oracle.com/docs/html/B25947_01/bcquerying008.htm#BCGIFHHF
Frank
Tags: Java
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