PL/SQL :: Writing User Defined Function The Same Way As The Oracle Functions
Sep 26, 2012
In one of the interviews , I have attended the guy asked me to write a user defined function which will take the column name and list all the values .
For example
Table Name:Employees
Column Name: Employee_Name
Employee_name
Scott
Ivgun
Jack
Shane
The query should be in this fromat
SELECT col_agg(Employee_name) emp_name from Employees;
The output should be
Emp_names
scott,ivgun,jack,shane
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Jan 12, 2012
If a user defined function in Oracle may throw and catch exceptions depending on input, now does the Oracle logs the exception? Fundamentally we are asking if Oracle logs any random DML errors (not bulk operation). We hope not, as we do not want our client DBA get concerned. There might be many levels of settings in Oracle to log or not log. So if Oracle may log it depending on setting, how do we suppress it either at Oracle specific schema level, or function level?
This is my user defined function:
create or replace FUNCTION ISNUMERIC(char_in CHAR) RETURN NUMBER IS
n NUMBER ;
BEGIN
n := TO_NUMBER(char_in);
RETURN 1;
EXCEPTION
WHEN OTHERS THEN
RETURN 0;
END;
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Jun 22, 2010
I am migrating sybase to oracle database. A Java developer needs money datatypes.I said to them, please change the cast(<value> as number(19,4) in java code side. but they are not accepted because money data type is used most of the places.
select cast(0 as money) from bank_trans; this sql statements present in java code. I need to create user defined type is equivalent to money datatype.
My steps
I have create user defined data types
create or replace type money as object(money as numbeer(19,4)
select cast(0 as money) from dual;
it shows inconsistent datatypes error.
create or replace type money is table of numbeer(19,4);
select cast(0 as money) from dual;
it shows inconsistent datatypes error.
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Jan 22, 2013
I am using oracle 10g version 10.2.0.1.0.
Can I use user-defined functions in my sql*loader control file and load in DIRECT path mode?
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Apr 11, 2012
Can we override the pre defined functions in oracle. I am able to do this in my schema. But if DB server contains more than one schema do I need to write the same procedure in all schemes.
we can call the same procedure with schema name from different schemes also . But is there any way to over ride the actual function provided by oracle (just like over riding the equals method of object class in java).
create or replace function to_number(var varchar2) return number
is
no number := var;
begin
return 99999;
end;
SQL> select to_number(' 234 ') oracle_function , dbo.to_number(234) user_function from dual;
ORACLE_FUNCTION USER_FUNCTION
--------------- -------------
234 99999
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Apr 12, 2012
I have made a function to add two number create or replace function add_num(a in number, b in number) return number
as
begin
return a+b;
end;
/
i run it via
select add_num(2,5) from dual;
my question is how to call add_num in procedure.
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Apr 28, 2013
can i create the user-defined functions and use them in the FILTER clause in the sem_match function? there are some built-in functions for the FILTER clasue. however, only one function (DATATYPE(literal)) support for date/time in the built-in functions. i want to implement some user-defined funcitons in the FILTER clause which can check time intervals in ontology. there are some functions about valid time in the WorkSpace Manager such as WM_OVERLAPS, WM_CONTAINS,WM_MEETS, etc. so, can i write some functions using the these valid time functions in WM and use them in the FILTER clause?
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Sep 24, 2012
Is it Possible to create User - defined Search forms in runtime oracle forms 6i . If One Having sample Forms
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Jul 14, 2010
The Scenario is that we have to restrict clients to write file on C drive for which we have to grant admin privileges(OS) which we don't wanna give. Rather they can write on their own profile.
In CMD we can find their profile with %userprofile% command,but i am confused of using it in oracle form. so is there any possibilities to redirect O/P to userprofileyour_file.txt
Just for an instance ,code is like this which is currently writing in C: drive
Declare
in_file TEXT_IO.FILE_TYPE;
linebuf VARCHAR2(80);
your_file VARCHAR2(50) := 'C:TEMPyour_file.dat';
text_line VARCHAR2(400);
[code].......
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Jun 19, 2012
I am trying to create a new data type but keeping getting a ORA-0902 invalid data type error. I am using the example show at:
Guess I cannot post a link until I have posted more than 5 messages so here is the link another way:
www(dot)psoug.org/reference/type.html
Specifically, all the steps work up to Create Table which fails with the error.
By work -- I mean the type gets created & the 3 select statements prior to Create Table confirm the existence of the ssn_t data type.
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Dec 17, 2010
I have got 2 users as user1 and user2.I have used the following statements from user 'user1':
create role GENEVAOBJECTS;
grant select, insert, update, delete on PRODUCT to GENEVAOBJECTS;
grant GENEVAOBJECTS to user2;
In the above statements, product is a table. Now, I could able to access this table from user 'user2'. But however if I write a procedure in user2 schema accessing the table product, then the procedure is not getting compiled.
create or replace procedure test_prc as
v_test number(9);
begin
select product_id into v_test
from PRODUCT where rownum=1;
[code]...
why I cannot access that table from procedure?
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Jun 19, 2012
I am trying to create & use a new data type but keep getting a ora-0902 invalid data type error running on 10g express. The create type and select statements execute fine and select confirms the ssn_t is a type. The create table statement fails with the invalid data type error.
Here is an example.
CREATE TYPE ssn_t AS OBJECT ssn_type CHAR(11));
SELECT object_name, object_type
FROM user_objects WHERE object_type = 'TYPE';
CREATE TABLE Z (A CHAR(4), B SSN_T);
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Oct 13, 2009
That is I have created the User Defined Data Type as following. CREATE OR REPLACE TYPE Bit_Type AS OBJECT(Bit NUMBER(1,0));
After completing this creation of new UDT, I am trying to create the table with this UDT as follows, CREATE OR REPLACE TABLE Sample_Bit ( RegID Bit_Type);
I received an Error Message like:
SQL Error: ORA-22913: must specify table name for nested table column or attribute
22913. 00000 - "must specify table name for nested table column or attribute"
*Cause: The storage clause is not specified for a nested table column or attribute.
*Action: Specify the nested table storage clause for the nested table column or attribute.
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Dec 28, 2010
Is it possible to easily set up a single User Defined Metric, to monitor all the users quotas? I know I can do it, if I make individual metrics for each user. But was hoping there was a simple way of combining them all into a single metric.
I am using Oracle 10G2 Standard Edition on a windows 2003 Server.
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Jun 29, 2011
I'm calculating a Z score based on some simple numerical data thus:
create table t (id number, val number);
insert into t values(1, 1795);
insert into t values(2, 1753);
insert into t values(3, 1743);
insert into t values(4, 1876);
insert into t values(5, 1848);
[Code] .....
the logic is quite simple - calculate a moving average over the previous 12 rows, and a stdev over the same window. Then subtract the prior row's moving average from the current value, and divide by the prior row's stdev.
The issue is I want to expose this logic in a BI tool (OBI EE v10g), meaning I can't use the nested analytic functions. How to achieve this logic in a single analytic pass? The sql above took about 2 minutes to write this morning, then I've spent all day looking at user-defined aggregate functions, but haven't even been able to get the first step, the moving average, working. I can understand that I can probably create an udaf to replicate the avg(val) over (order by id ROWS BETWEEN 11 PRECEDING AND 0 FOLLOWING) functionality, but I can't see how to bundle the logic for the other three steps in the calculation into this.
From what I've read, the ODCIAggregateMerge should allow me to combine different threads that can return the different values I need for the current row calculation. Is this correct?
The only example udafs I can find are either not relevant (STRAGG) or very simple (ie don't appear to invoke multiple passes). I've also had a look at the COLLECT function, but again I can't see a way to use this.
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May 3, 2011
I have designed a Login form which takes username, password and connect string is hardcoded.I have compiled it, made an fmx file. created a shortcut to desktop. given the BIN path in shortcut.
when i want to lauch it, oracle's default login popup is shown.It can be by passed while defining username/password@string in shortcut properties but it reveals the password. every one can access it. I want to launch my own form without logging in to oracle. how can i avoid default login popup?
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Jan 25, 2011
Can we able to declare a user define exception name as per defined exception name?Ex: we have predefined exception called :"NO_DATA_FOUND "
Now in my PL/SQL block can i able to declare "NO_DATA_FOUND" like
Begin
no_data_found exception;
//statements
raise no_data_found;
end
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Aug 25, 2012
Through sql*plus, how can I copy a user-defined type from other schema to mine?
I've granted the execute object privilege over the user-defined type to my user, so I can use the type.
I know I can manually write and create the type, but I wanna learn (if exist) a statement to copy the user-defined type, something like:
CREATE TABLE x2 AS
(SELECT *
FROM x1);
I'm testing ORACLE DATABASE 11g R2 over Windows O. S.
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Nov 25, 2012
How can I apply a user metric for DB (single database) using a script or cli?
clear my question:
Can I create a User Defined Metric using SQL code, and not via the graphical interface?
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Dec 18, 2010
I'm attempting configure User-defined Metric to send mails when happen warning or critical alerts .My environment is Cluster Database and I'm using OEM Grid Control
I created User-defined Metric for monitoring invalid object for example and scheduled this collect to every 5 minutes.On initial OEM page, I see alert violation, but don't receive mail for this. In my Notification Rules page, I added "User-Defined Numeric Metric" and includes object Check_Invalid_Objects, wich is my UDM.I receive several alerts violations, but don't UDM.
UDM_Violation.png ( 116.68K )
Number of downloads: 0
NotificationRule.jpg ( 218.78K )
Number of downloads: 0
ScheduleNotification.jpg ( 373.64K )
Number of downloads: 0
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Sep 7, 2012
how to define user defined exceptions for cases like, ==> when anyone tries to insert string values without using single quotation marks " '...' "? ==> update the column which is not present in table.
how can I define user defined exceptions for such cases?
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Dec 2, 2010
I need to transfer PL/SQL or NESTED table from LOCAL database to REMOTE.I need to be able to use that transfered table in SELECT statement.I tried:
--ON LOCAL
SELECT SYS_OP_GUID() FROM DUAL;
--966D2DFEAEEB80D6E0430A0166CB80D6
create or replace type varchar_number_oid OID '966D2DFEAEEB80D6E0430A0166CB80D6' as object (
v varchar2(10),
i number);
/
Type created
SELECT SYS_OP_GUID() FROM DUAL;
--966D2DFEAEFB80D6E0430A0166CB80D6
[code]....
I tried using PL/SQL types it worked, but then i have a problem that i can not use local collection in SQL.
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Dec 19, 2011
Is it possible to hide/suppress an user defined alert message in Oracle Forms application?
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May 9, 2003
I am having a OCCI problem, I try to retrieve a collection of user-define objects.
The major steps I am using are
1. define database object
CREATE OR REPLACE TYPE my_obj_t AS OBJECT
( id number, name varchar2(10) )
CREATE OR REPLACE
TYPE my_obj_tab_t as table of my_obj_t;
2. A stored procedure return a collection as out paramerter
my_stored_procedure(obj_list out my_obj_tab_t);
3. Using OTT to generate the *.cpp and header files.
4. Register out parameter like
vector<my_obj_t> vect;
stmt->registerOutParam(1, OCCIVECTOR,
sizeof (vect),
"MY_OBJ_TAB_T");
5. stmt->execute();
6. Try to get the results by
getVector(stmt, 1, vect);
I am getting compilation error:
Could not find a match for
oracle::occi::getVector(oracle::occi::Statement*,
int, std::vector<my_obj_t, std::allocator<my_obj_t>>).
Am I doing the right things ?What steps and function should I use ?
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Oct 16, 2013
I have this requirement, I have a following Record type within a package, instead of selecting datas into this i need to assign variables to this record type
TYPE xx_delivery_detail_rectype IS RECORD ( p_delivery_id NUMBER, p_ultimate_dropoff_location_id NUMBER, p_creation_date DATE, p_last_update_date DATE, p_container_name VARCHAR2 (30), p_inventory_item_id NUMBER, p_shipped_quantity NUMBER, p_shipment_line_id NUMBER ); TYPE xx_delivery_table_rectype IS TABLE OF xx_delivery_detail_rectype INDEX BY BINARY_INTEGER;
Say i have variables to assign to all the values within the record type, How do i do it within the package
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Jul 5, 2013
I have a two different Databases. I created a db link in DB 1 to connect to DB 2 and it is working fine when I select data from any table. but I have one table in the DB2 which has a column with user defined data type . so when I try to select this column from DB 2 by using the DB link it gives me this error :ORA-22804 remote operations not permitted on object tables or user-defined type columns.
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Oct 30, 2012
difference between Difference between Deterministic functions and Function result cache in 11g?
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May 1, 2013
I have to do a query in oracle 11g
i want to cumpute the percentage of believers of every religion from the world's population
country:name,code,population
example data "Argentina" "ar" "39144753"
religion:country,name,percentage
example data
ar Jewish 2
ar Protestant 2
ar Roman Catholic 92
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Dec 31, 2011
We are using one software it is a test tool for verify the data base posting speed from server to client systems. In windows 2008 R2, database posting speed is very slow when compare to windows 2003 server .
Server configuration is same for both servers ( RAID 5 , RAM 4 GB) how we can improve writing performance in Oracle
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May 3, 2012
I am Getting the error when writing the procedure. How to Solve this Error .
Error: PLS-00306: wrong number or types of arguments in call to 'PUT_LINE'
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