Using the vs do-it-all formula in a sql
As a beginner, I worked on some reports, and very often I need to decide whether to put the code in CF (formulas) vs in the main query.Using CF, the code is cleaner since the function is dedicated to a task, as do all the tasks in a single big sql will make it harder to read and maintain on the road.
However, I am concerned about the degradation of performance regarding CF.
First he CF is PL/SQL and SQL and PL/SQL execution at the same time involves the change of context.
In addition, according to my colleagues, SEE run in report server, while SQL runs in the DB server. The IO involved between the two servers is also another penalty (or is it a kind of load balancing, which reduces the workload on the DB server)?
Right now I'm trying to add CF as little as possible, as it is difficult to tighten requirements in the main SQL. I have made the right choice?
Thank you very much.
Hello
You do think it rigth...
http://download-UK.Oracle.com/docs/CD/B14099_17/bi.1012/b14048/pbr_tune.htm
20.4.3 calculations
In a report (either by summary columns or formulas), to ensure that most of the calculations is performed by the data source. In the case of SQL queries, the calculations are performed on the database rather than the data retrieved by the report. User-defined functions and stored procedures in the database can also be included in the select list of the query to a database Oracle or a JDBC query. It is more efficient to use a local function, since the calculated data is returned as part of the database of results.
Concerning
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