Creating Functions in View

Hai..
i had a problem regarding the creation of function..
the problem is:
i need to compare the column values to get the minimum rate..
i.e
my problem goes like this..
i have a view with four fields of number datatype
how to get minimum valu of each row
eg..
weigh1 weigh2 weigh3
25 50 70
50 70 70
the result should be:
weigh1 weigh2 weigh3 result
25 50 70 25
50 70 70 50
here the result col contains min value of each row..
thanks
nandakumarc

Select w1,w2,w3,Least(w1,w2,w3) from ...

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Create sequence, function and view all at once -script or something similar

Hi I would like to know in what way can I write a script or something like that which would define names for a sequence, function and a view in the beginning (for example TEST_SEQ, TEST_FJ, TEST_VIEW...) and after that create this sequence, function and view with definitions like
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MINVALUE 1 MAXVALUE 999999999999999999999999999
INCREMENT BY 1 START WITH 1 NOCACHE NOORDER NOCYCLE;
create or replace FUNCTION TEST_FJ RETURN NUMBER AS
tmp number;
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hi,
hope help you...
this is my basic generic solution...
create or replace procedure createSequence( psequenceName in varchar2 ) is
begin
execute immediate 'create sequence ' || psequenceName ;
execute immediate 'grant select on ' || psequenceName || ' to public ';
end ;
create or replace function getNextVal( psequenceName in varchar2 ) return number is
queryText varchar2(100) := 'select <sequence_name>.nextval into :next_value from DUAL' ;
next_value number ;
begin
queryText := replace(queryText,'<sequence_name>',psequenceName);
execute immediate queryText into next_value ;
return( next_value ) ;
end ;
Edited by: edogt on Nov 27, 2008 5:33 AM
Edited by: edogt on Nov 27, 2008 5:35 AM
Edited by: edogt on Nov 27, 2008 5:35 AM

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How to create a buy view??

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Hello,
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STORAGELOCATIONDATAX = T_MARDX
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Read Materialized View Refresh for complete information.
For a Jist:
Refresh Mode Description
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from dual;
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ERROR at line 8:
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Thanks,
Edward
For your reference, here is a describe of the pasta table:
SQL> desc pasta
Name Null? Type
CHEESE NUMBER(4)
TOMATO VARCHAR2(20)
SALT VARCHAR2(1)
OREGANO VARCHAR2(20)
OLIVE_OIL VARCHAR2(40)

Edward:
Something like this should work:
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John

Creating a combined view of two spatially indexed tables

Hi All,
I'm using oracle 10g and C++ occi to store and retrieve data. I have two tables that are identical in structure, they have an SDO_GEOM column where I store lat/long/altitude info. When I store the data using a stored procedure, the data is put into the correct table. I now want to retrieve the data using a spatial operator - I use SDO_NN to retrive data within a given distance of a lat/long/altitude point. This works fine for a single or multiple tables as I use a stored function to give me the data back as an object. I now have a requirement to list all the data from both tables - I thought I could do this by creating a combined view but I understand this cannot be done with spatial data - I habe also tried using the join operator but I am having problems since the columns for each table are identical. Is there any workaround for this - the combined view will not have any spatial operators run on it, I just need to return each row (the spatial data can be returned as individual lat/long/alt instead of as a SDO_GEOM. A second idea I had would be to return all the data using a ref cursor - this works for a single table but I do not understand how I can open the cursor with a select from two tables with identical column names.
Unfortunately it is a requirement that the tables are seperate so combining the two tables into one is not an option.
Thanks in advance for any help anyone can offer,
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You can create a UNION ALL view:
CREATE TABLE cola_markets_1 (
mkt_id NUMBER PRIMARY KEY,
name VARCHAR2(32),
shape SDO_GEOMETRY);
CREATE TABLE cola_markets_2 (
mkt_id NUMBER PRIMARY KEY,
name VARCHAR2(32),
shape SDO_GEOMETRY);
CREATE VIEW v1 AS
SELECT * FROM cola_markets_1 UNION ALL SELECT * FROM cola_markets_2;
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like:
explain plan for SELECT c.mkt_id, c.name FROM v1 c WHERE SDO_NN(c.shape, SDO_GEOMETRY(2003, NULL, NULL, SDO_ELEM_INFO_ARRAY(1,1003,3), SDO_ORDINATE_ARRAY(4,6, 8,8)) , 'sdo_num_res=1') = 'TRUE';
0 SELECT STATEMENT     |           |
1 VIEW               | V1          |
2 UNION-ALL          |           |
3 TABLE ACCESS BY INDEX ROWID| COLA_MARKETS_1
4 DOMAIN INDEX     | COLA_SPATIAL_IDX_1
5 TABLE ACCESS BY INDEX ROWID| COLA_MARKETS_2
6 DOMAIN INDEX     | COLA_SPATIAL_IDX_2
However, the above SDO_NN query will return 2 rows (one from each table),
because it can only work on one table, it won't return the nearest neighbor
from the combined view without some tweaks. For example, to return the
top one, you may try:
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of spatial operators (including SDO_NN), when a UNION ALL view is used. i.e. the following
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SELECT c.* FROM v1 c, another_table b WHERE b.id =1 and SDO_NN(c.shape, b.shape, 'sdo_num_res=1')= 'TRUE';

Usage SQL functions in View

Hi,
I need to create a SQL View in Java Dictionary component. Is it possible to use SQL functions like "UPPER", "LCASE" and so on in SELECT statement? For example I need to divide one column in table with type of TIMESTAMP on two columns in View with types DATA and TIME. But when I try to create a View in Java Dictionary like:
CREATE VIEW "Z_TMP_DOMAIN_VIEW"
    ("Z_TMP_DOMAIN_ID","NAME")
AS SELECT
    "a"."ID", left("a"."NAME",30) "name"
FROM
    "Z_TMP_DOMAIN" "a"
The build failed with the error:
Z_TMP_DOMAIN_VIEW': View is not generated
     [ddgen] [Error]   DtDbView 'Z_TMP_DOMAIN_VIEW': View statement is incorrect: CREATE VIEW "Z_TMP_DOMAIN_VIEW"
     [ddgen]     ("Z_TMP_DOMAIN_ID","NAME")
     [ddgen] AS SELECT
     [ddgen]     "a"."ID", left("a"."NAME",30) "name"
     [ddgen] FROM
     [ddgen]     "Z_TMP_DOMAIN" "a"
Perhaps someone knows how can I work out or work around this problem?

Hi,
I need to create a SQL View in Java Dictionary component. Is it possible to use SQL functions like "UPPER", "LCASE" and so on in SELECT statement? For example I need to divide one column in table with type of TIMESTAMP on two columns in View with types DATA and TIME. But when I try to create a View in Java Dictionary like:
CREATE VIEW "Z_TMP_DOMAIN_VIEW"
    ("Z_TMP_DOMAIN_ID","NAME")
AS SELECT
    "a"."ID", left("a"."NAME",30) "name"
FROM
    "Z_TMP_DOMAIN" "a"
The build failed with the error:
Z_TMP_DOMAIN_VIEW': View is not generated
     [ddgen] [Error]   DtDbView 'Z_TMP_DOMAIN_VIEW': View statement is incorrect: CREATE VIEW "Z_TMP_DOMAIN_VIEW"
     [ddgen]     ("Z_TMP_DOMAIN_ID","NAME")
     [ddgen] AS SELECT
     [ddgen]     "a"."ID", left("a"."NAME",30) "name"
     [ddgen] FROM
     [ddgen]     "Z_TMP_DOMAIN" "a"
Perhaps someone knows how can I work out or work around this problem?

Oracle Execution Time for function inside view

Hi Guys,
i would like to ask if i call a function inside a view , how does it behave in term of execution time and performance
For Example i have a view as below
create or replace view CUST.CUST_VIEW
select a.nice , a.getCustomDisplay(a.name,a.pin,a.dos,b.master_key) as custom from CUST.customer as a , CUST.master as b
where a.idno = b.main_id_no
AND the function look like this
create or replace function getCustomDisplay(a varchar2,b varchar2,c varchar2,d varchar2)
begin
select * from CUST.MAPPING_MATRIX order by idno asc;
for loop
//logic goes here to determine the result return from matrix
end
My Question is for example
1. If i do select * from CUST.CUST_VIEW ( return 1000 records for example ) , so the function getCustomDisplay will be executed 1000 times also right ( that means select * from CUST.MAPPING_MATRIX order by idno asc; will also be executed 1000 times ) ?
2. If i do select * from CUST.CUST_VIEW where rownum <= 20 , how many times getCustomDisplay() function will be executed ?
The reason i ask this because recently we saw a few million execution times per day from AWR report for this query
"select * from CUST.MAPPING_MATRIX order by idno asc;"
But when i investigate , and put a logger whenever it call getCustomDisplay , the query above as mention in item no 2 only will be executed as many as the record that will be returned from ( view + where condition ).
3. will it affect performance if my view return a lot of records ? or is there any way to improve it?
Thanks

Hi
i have other solutions that seems work for reducing number of execution times but do you think its scalable and feasible ?
CREATE OR REPLACE package body ACER.TYPE_CAT_PASS_UTIL_TEST as
*/* Private package data */*
TYPE g_rec IS RECORD (
id_no               VARCHAR2 (4),
type_pass            VARCHAR2 (3),
scheme_ind           VARCHAR2 (5),
cat_pass             VARCHAR2 (2),
entrepass            VARCHAR2 (2),
display_type_pass        VARCHAR2 (15),
display_cat_pass         VARCHAR2 (5),
display_type_pass_desc    VARCHAR2 (80),
rule_id                  VARCHAR2 (5)
TYPE g_tab_type IS TABLE OF g_rec INDEX BY BINARY_INTEGER;
g_tab   g_tab_type;
i       BINARY_INTEGER;
procedure initializeTypePassMatrix(test IN varchar2) as
begin
if(g_tab.COUNT < 1)then
FOR appln_rec in (
SELECT tb_type_cat_pass_matrix.id_no,
tb_type_cat_pass_matrix.type_pass,
tb_type_cat_pass_matrix.scheme_ind,
tb_type_cat_pass_matrix.cat_pass,
tb_type_cat_pass_matrix.entrepass,
tb_type_cat_pass_matrix.display_type_pass,
tb_type_cat_pass_matrix.display_cat_pass,
tb_type_cat_pass_matrix.display_type_pass_desc,
tb_type_cat_pass_matrix.rule_id
FROM tb_type_cat_pass_matrix ORDER BY id_no asc)
LOOP
dbms_output.put_line('g_tab.COUNT before insert: ' || g_tab.COUNT);
i := g_tab.COUNT + 1;
g_tab (i).id_no         := appln_rec.id_no;
g_tab (i).type_pass         := appln_rec.type_pass;
g_tab (i).scheme_ind        := appln_rec.scheme_ind;
g_tab (i).cat_pass          := appln_rec.cat_pass;
g_tab (i).entrepass        := appln_rec.entrepass;
g_tab (i).display_type_pass     := appln_rec.display_type_pass;
g_tab (i).display_cat_pass     := appln_rec.display_cat_pass;
g_tab (i).display_type_pass_desc:= appln_rec.display_type_pass_desc;
g_tab (i).rule_id         := appln_rec.rule_id;
DBMS_OUTPUT.put_line ('g_tab.count after insert: ' || g_tab.COUNT);
END LOOP;
else
DBMS_OUTPUT.put_line ('g_tab>=1, no need to initialize');
end if;
exception
when others then
dbms_output.put_line('error happen'||DBMS_UTILITY.format_error_backtrace);
Logger.ERROR('TYPE_CAT_PASS_UTIL.initializeTypePassMatrix',SQLCODE,SQLERRM || ' ' ||DBMS_UTILITY.format_error_backtrace,'SYSTEM');
end initializeTypePassMatrix;
procedure populateTypeCatPassFullDesc(typePass IN varchar2, schemeInd IN varchar2,catPass IN varchar2,entrePass IN varchar2, displayTypePass IN OUT varchar2,displayTypePassDesc IN OUT varchar2, displayCatPass IN OUT varchar2 )is
v_displayTypePass varchar2(15) :='-';
v_displayTypePassDesc varchar2(100) :='-';
v_displayCatPass   varchar2 (2):='-';
v_type_pass varchar2(3) := '';
v_scheme_ind varchar2(5) := '';
v_cat_pass varchar2(2);
v_entrepass varchar2(2);
v_flag_valid_1 boolean:=false;
v_flag_valid_2 boolean:=false;
v_flag_valid_3 boolean:=false;
v_flag_valid_4 boolean:=false;
v_appln_rec g_rec;
begin
dbms_output.put_line('line 1');
initializeTypePassMatrix('test');
FOR nomor in g_tab.FIRST .. g_tab.LAST
LOOP
v_appln_rec := g_tab(nomor);
dbms_output.put_line('line 2.1');
v_flag_valid_1 :=false;
v_flag_valid_2 :=false;
v_flag_valid_3 :=false;
v_flag_valid_4 :=false;
v_type_pass     := v_appln_rec.type_pass;
v_scheme_ind    := v_appln_rec.scheme_ind;
v_cat_pass     := v_appln_rec.cat_pass;
v_entrepass    := v_appln_rec.entrepass;
dbms_output.put_line('line 2.2');
if(typePass = v_type_pass or v_type_pass = 'NA') then
v_flag_valid_1:= true;
end if;
if(schemeInd = v_scheme_ind or v_scheme_ind='NA') then
v_flag_valid_2 := true;
elsif(schemeInd is null and v_scheme_ind is null) then
v_flag_valid_2 := true;
end if;
if(catPass = v_cat_pass or v_cat_pass='NA') then
v_flag_valid_3 := true;
elsif(catPass is null and v_cat_pass is null) then
v_flag_valid_3 := true;
end if;
if(entrePass = v_entrepass or v_entrepass='NA') then
v_flag_valid_4 := true;
end if;
if(v_flag_valid_1 = true and v_flag_valid_2 = true and v_flag_valid_3 = true and v_flag_valid_4 = true) then
v_displayTypePass     := v_appln_rec.display_type_pass;
v_displayCatPass     := v_appln_rec.display_cat_pass;
v_displayTypePassDesc   := v_appln_rec.display_type_pass_desc;
dbms_output.put_line('rule id got :'||v_appln_rec.rule_id);
dbms_output.put_line('rule no got :'||v_appln_rec.id_no);
exit when (0 = 0);
end if;
END LOOP;
displayTypePass := v_displayTypePass;
displayCatPass := v_displayCatPass;
dbms_output.put_line('1type:' || v_displayTypePassDesc);
displayTypePassDesc :=    v_displayTypePassDesc;
dbms_output.put_line('2type:' || displayTypePassDesc);
dbms_output.put_line('type:' || v_displayTypePass);
dbms_output.put_line('cat :' || v_displayCatPass);
exception
when others then
dbms_output.put_line('error happen'||DBMS_UTILITY.format_error_backtrace);
Logger.ERROR('TYPE_CAT_PASS_UTIL.populateTypeCatPass',SQLCODE,SQLERRM || ' ' ||DBMS_UTILITY.format_error_backtrace,'SYSTEM');
end populateTypeCatPassFullDesc;
function getDisplayTypePass(typePass IN varchar2, schemeInd IN varchar2,catPass IN varchar2,entrePass IN varchar2) return varchar2 is
v_displayTypePass varchar2(15) :='-';
v_displayTypePassDesc varchar2(100) :='-';
v_displayCatPass varchar2(2) :='-';
begin
populateTypeCatPassFullDesc(typePass,schemeInd,catPass,entrePass,v_displayTypePass,v_displayTypePassDesc,v_displayCatPass);
return v_displayTypePass;
exception
when others then
dbms_output.put_line('error happen'||DBMS_UTILITY.format_error_backtrace);
Logger.ERROR('TYPE_CAT_PASS_UTIL.populateTypeCatPass',SQLCODE,SQLERRM || ' ' ||DBMS_UTILITY.format_error_backtrace,'SYSTEM');
end getDisplayTypePass;
end TYPE_CAT_PASS_UTIL_TEST;
By Using like above even i do query on select * from <some_view) it will be only one execution for
SELECT tb_type_cat_pass_matrix.id_no,*
**tb_type_cat_pass_matrix.type_pass,**
**tb_type_cat_pass_matrix.scheme_ind,**
**tb_type_cat_pass_matrix.cat_pass,**
**tb_type_cat_pass_matrix.entrepass,**
**tb_type_cat_pass_matrix.display_type_pass,**
**tb_type_cat_pass_matrix.display_cat_pass,**
**tb_type_cat_pass_matrix.display_type_pass_desc,**
**tb_type_cat_pass_matrix.rule_id**
**FROM tb_type_cat_pass_matrix ORDER BY id_no asc*
the key point is the initializeTypePassMatrix function but it seems the variable only works for one session ?
if i open new session it will be reset again .

Using Max Function in View Criteria

Hi
I am having a requirement where by i need to make use of max function in view criteria but not able to see any such option. Can someone please help me over it. Here is the requirement.
In table i will be having multiple rows for an employee and i need to pick latest row based on a column say request_id For e.g.
Emp RequestId
A 1
A 2
A 3
A 4
So if i pass the employee id i should get Row Number 4. In simple SQL language I want something like this
select * from emp where empid=A and requestid=( select max(requestid) from emp where empid=A)
Just wanted to know is there any approach that i can use to do all this as part of View Criteria or any other way.
Any help is appreciated!!!
Thanks
AJ

One way is this -
1)https://blogs.oracle.com/adf/entry/using_groovy_aggregate_functions_in (You might need to create a self-referencing VL for this , try if it works using a ViewAccessor too)
OR
Order by RequestId descending in your SQL for the VO if thats ok , then have the ViewCriteria for the EmpId and programmatically pickup the first row...

How to create function module step by step

hi experts,
i am new to ABAP.
can anybody tell me the step by step process on how to create a function module for adding two numbers without using editor screen.
ex: 2+3=5.

Hi,
You can only create function modules and function groups using the Function Builder in the ABAP Workbench. For further information, refer to Creating New Function Modules. This section uses an example to illustrate how a function module is created from the point of view of ABAP programming.
Function Groups and Function Modules:
Firstly, we create a new function group DEMO_SPFLI to hold the function module. Then, we can create the new function module.
Parameter Interface:
You can specify the types of interface parameters in function modules in the
same way as the parameter interfaces of subroutines. Since function
modules can be used anywhere in the system, their interfaces can only contain
references to data types that are declared systemwide. These are the elementary
ABAP data types, the systemwide generic types, such as ANY TABLE, and types
defined in the ABAP Dictionary. You cannot use LIKE to refer to data types
declared in the main program.
Exceptions:
Our function module needs an exception that it can trigger if there are no entries
in table SPFLI that meet the selection criterion. The exception NOT_FOUND
serves this function.
Source Code:
Having defined the parameter interface and exceptions, we can now write the
source code of our function module. To do this, choose Source code in the
Function Builder. This opens the ABAP Editor for the include program
L<fgrp>U<xx> (see Function Groups). This is the include that will
hold the program code for the function module;
Data in Function Modules
You can use the TYPES and DATA statements to create local data types and
objects. The interface parameters also behave like local data objects. In
addition, you can access all of the global data of the main program. This data is
defined in the include program L<fgrp>TOP. To open this include, choose Goto
Global data. The global data behaves like the instance attributes of a class.
The first time you call a function module in a particular function group, the data is
loaded into memory. It can then be accessed and changed by all of the function
modules in the group. The system retains the values until the next time a function
module is called.
Calling Subroutines
You use subroutines for local modularization. Function modules can
also use this technique. The function module that they call are defined in the
corresponding main program.
If you only want to call a subroutine from a single function module, it is best to
define them in the same include program as the function module itself, directly
after the ENDFUNCTION statement. These subroutines can be called from all
function modules in the function group, but for clarity, they should only be called
from the function module that precedes them.
If you want to define a subroutine that will be called from several different function
modules, you can define a special include program for it with the name
L<fgrp>F<xx>.
Raising Exceptions
There are two ABAP statements for raising exceptions. They can only be used in
function modules:
RAISE <except>.
and
MESSAGE..... RAISING <except>.
The effect of these statements depends on whether the calling program handles
the exception or not. If the name <except> of the exception or OTHERS occurs
in the EXCEPTIONS addition of the CALL FUNCTION statement, the exception is
handled by the calling program.
If the calling program does not handle the exception
The RAISE statement terminates the program and switches to debugging mode.
The MESSAGE ..... RAISING statement display the specified message. How the
processing continues depends on the message type.
If the calling program handles the exception, both statements return control to the
program. No values are transferred. The MESSAGE ..... RAISING statement
does not display a message. Instead, it fills the system fields SY-MSGID, SYMSGTY,
SY-MSGNO, and SY-MSGV1 to SY-MSGV4.
Source Code of READ_SPFLI_INTO_TABLE
The entire source code of READ_SPFLI_INTO_TABLE looks like this:
FUNCTION READ_SPFLI_INTO_TABLE.
""Local interface:
*" IMPORTING
*" VALUE(ID) LIKE SPFLI-CARRID DEFAULT 'LH '
*" EXPORTING
*" VALUE(ITAB) TYPE SPFLI_TAB
*" EXCEPTIONS
*" NOT_FOUND
SELECT * FROM SPFLI INTO TABLE ITAB WHERE CARRID = ID.
IF SY-SUBRC NE 0.
MESSAGE E007(AT) RAISING NOT_FOUND.
ENDIF.
ENDFUNCTION.
The function module reads all of the data from the database table SPFLI where
the key field CARRID is equal to the import parameter ID and places the entries
that it finds into the internal table SPFLI_TAB. If it cannot find any entries, the
exception NOT_FOUND is triggered using MESSAGE...RAISING. Otherwise, the
table is passed to the caller as an exporting parameter.
Regards,
Chandru

Creating Functions in View

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