function and packages

Hi friends,

I have a requirement where in I need decode my source table values while inserting in my target table. I usually do my task by performing functions (don't use case and decode). My first question is

(1) is using the function to accomplish these tasks is good. I have several of these conversion requirements.
(2) Clubbing subprogrammes togther in packages is a good habit. But what should be the number of these subprogrammes. I can club togther 100 of this togther functions (a function of the average is 50 lines)? If this is not the case, what should be the thoughts of segregation?
(3) are the oracle integrated like sqrt, length etc. deterministic functions?

This code represents a typical requirement of the mine where in I map my name of source country in the target
ID of country when migrating my data from the source to the target.

create table source 
(
emp_id number,
empname varchar2(100),
sal number,
country varchar2(100)
);


insert into source values (1,'ALEX',1000,'US');
Insert into source values (2,'RAHUL',2000,'IND');
Insert into source values (3,'KARTIK',3000,'IND');
Insert into source values (4,'SHADOW',5000,'US');
insert into source values(5,'LOUI',1500,'JAP');


Create table source_country_code
(
country varchar2(100),
abbrv  varchar2(100),
area number,
climate varchar2(100)
);

insert into source_country_code values ('UNITED STATES','US',10000,'COLD');
insert into source_country_code values ('INDIA','IND',100000,'HOT');
insert into source_country_code values ('JAPAN','JAP',1000000,'MODERATE');




Create table target_country_code
(
country_id number,
descr  varchar2(100),
density number,
weather varchar2(100)
);

insert into target_country_code values (101,'this is descrition txt 1',1001,'COLD');
insert into target_country_code values (102,'this is descrition txt 2',1001,'HOT');
insert into target_country_code values (103,'this is descrition txt 3',1001,'MODERATE');



create table target
(
emp_id number,
empname varchar2(100),
sal number,
country_id number
);

I generally functions for this kind of mappings. I have several of these requirements as indicated above and the
cardinality of data is high.

create or replace function transform (in_src_country varchar2) return number deterministic
as
l_country_id number;
l_climate varchar2(1000);
begin

select climate into l_climate from source_country_code
   where upper(abbrv)=upper(in_src_country);
   
select country_id into l_country_id
from target_country_code
where upper(weather)=upper(l_climate);

return(l_country_id);
exception 
when no_data_found then
return null;
end;

last step,

so, what I usually do is

insert into target
Select emp_id, empname, sal, transform (country) in the source;

As always, thank you

Rahul

Published by: Rahul K on 5 June 2013 10:51

No technique is universally good or bad universally. You must understand your needs, the compromise and what you're trying to optimize for.

If you don't care anything else you are looking for the absolute fastest performance, reduce what you have to do in PL/SQL is a good idea. Most of the people and most of the systems, however, prefer to have code that is a bit slower if it makes the code easier to maintain and easier to write or minimizes the number of places that the code is duplicated. If you attempt to load a data warehouse of company with billions of new lines every night, you're as almost exclusively worry about raw performance. And, if you design correctly, there is that one way to load any particular item of data, you don't have to worry about code duplication because there will always be an INSERT statement that inserts data in a particular table. If you build an OLTP application, on the other hand, it is very likely that there will be many places where you want to do something like search for a value and you are much less concerned about raw performance you're on maintainability and ensure that you do not duplicate the code. In these cases, well-designed functions and procedures are well worth the return miners (so if you do a query of single line as most OLTP systems are generally easier to treat if you write DSS queries that return millions of processing lines billionr lines.

Justin

Tags: Database

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How to move the functions and procedures of packages in a schema?

Hello
I have less than the needs for a work at home and my question is if anyone can point me in the right direction to find documentation that can help me solve below. Any information will be appreciated. Thank you.
Write procedures and functions (included or not in packets) as .txt or .sql scripts. Once they have been launched in Developer SQL they should, in addition, the functions and procedures of packages in the current schema. If the current schema contains only 2 packages, pac1 (p11, p12 procedures and functions f11, f12, f13) and pac2 (contains the p21 following procedures, p22, p23 and f21 and functions f21 (case of overload), running the scripts produce the following effects:)
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My only advice would be to remember that these are public forums and if YOU can find them, therefore cannot your instructors.

In addition, those are horrible procedure names and function

This mission seems to be around to overload the pl/sql objects and... prioritize a research on Oracle documentation around overhead and legacy
http://docs.Oracle.com/CD/B28359_01/AppDev.111/b28371/adobjplsql.htm#i21148

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RLBickham wrote:
I don't think I've been pretty clear in the description of the specific thing I want to do, simply, it does not reach the level of forms of conversion of the APEX. It is basically a problem of PLSQL function.

I have an interactive report which is currently 90 percent of what I want however, each line, which represents a Mission may have several feet. Each arm has two places or ICAO codes attached to it. Based on the number of Mission, I want to loop through the array of leg, collect all the codes of ICAO for this Mission, put them together in 1 variable separated by a coma and add this variable to display the columns in this interactive report as the last column.

In Oracle Forms, I have a function registered in the database, which is called in the main query. Maybe I ask a question that does not need to be asked, but anyway my question is can I put this function currently in the database somewhere within the interactive report and somehow reference it via Http, or should I just stick with set of functions and procedures in the packages stored in the database and called the conventional way?

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-----

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*

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I use APEX 4.2.1.00.08 and I wonder if there is a way to translate "Function and Global Variable declaration" textarea. Any other script text box is available for translation, but not this one.
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-----------
Member of the APEX development team
My Blog: http://www.inside-oracle-apex.com
APEX Plug-Ins: http://apex.oracle.com/plugins
Twitter: http://www.twitter.com/patrickwolf

What is the difference between size function and aggragate function?
Hi Experts,

In OBIEE 11.1.1.6.0, what is the difference between size function and aggragate MDB measure column function?
If it contains material or detail information, I am very grateful to you.
Hello

Good example with screenshots-

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Mark this reply / helped.

Concerning
Young

How to add the menu, under menu, forms and functions function and sub in resp.
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Appreciate your help.

Published by: 931161 on December 14, 2012 10:55
Hello

PL. visit following links.

http://erpschools.com/articles/sub-functions-in-Oracle-application#13554535205441&95816:resize_frame
http://www.trutek.com/Serendipity/index.php?/archives/15-an-example-of-how-to-create-custom-functions, - the Menus - and - Responsibilities.html
http://www.YouTube.com/watch?v=PKUiVIM0t94

HTH
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Same algorithm in function and procedure so that one will be better?
Why is better to pl sql function calculates a value instead of the procedure?
If I apply the same algorithm in function and procedure while one will perform better?
Siddharth Singh says:
Oracle documentation

http://docs.Oracle.com/CD/B10500_01/AppDev.920/a96624/08_subs.htm

This:

Generally, you use a procedure to perform an action and a function to calculate a value.

Does not mean that the function are better to calculate a value, but you usually use functions to calculate a value.

Usually, a function is can be more useful if you plan to use in a query.
that is to say:
```
SELECT myfunc(col1) from mytable;
```
That you can't do with a procedure. Functions are also usually limited to the returning a single value, while procedures may have several OUTPUT parameters.

Kind regards.
Al

Published by: Alberto Faenza on 21 November 2012 15:31

function and packages

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