I have one row in my Company_Person_all view named by 'YENER UZUN' in EMPLOYEE_NAME column (I already want only one result). When I send parameter to this function (fname, instead of using 'YENER UZUN') I encounter
ORA-01422:exact fetch returns more than requested number of rows ...
What should I do to prevent this error? Also when I write the code below ('YENER UZUN', instead of fname) it's ok it doesn't give me an error.
FUNCTION Get_Calistigi_Santiye_By_Fname(fname IN varchar2)
RETURN varchar2
IS
temp_ varchar2(100);
BEGIN
select free_field6
into temp_
from company_person_all
where employee_name = 'YENER UZUN';
DBMS_OUTPUT.put_line(temp_);
RETURN temp_;
END;
I solved it by changing 'fname' parameter name to 'xyz'. 'fname' was being used a RECORD instance name by other procedures and functions in the package.
So that when i changed parameter name the error instantly fixed.
Mostly, Using a cursor instead of select .. into is a shortcut to avoid ORA-01422 with a proper order by(asc [default] / desc) clause due to which of the records prefer for your business logic(last or first record ) as in the following :
FUNCTION Get_Calistigi_Santiye_By_Fname( fname company_person_all.employee_name%type )
RETURN company_person_all.free_field6%type
IS
temp_ company_person_all.free_field6%type;
BEGIN
for c in
(
select free_field6 ff6
from company_person_all
where employee_name = fname --> 'YENER UZUN'
order by work_date_time
)
loop
temp_ := c.ff6;
end loop;
dbms_output.put_line(temp_);
RETURN temp_;
END;
Related
I need to create a procedure which will take collection as an input and compare the data with staging table data row by row for every field (approx 50 columns).
Business logic :
whenever a staging table column value will mismatch with the corresponding collection variable value then i need to update 'FAIL' into staging table STATUS column and reason into REASON column for that row.
If matched then need to update 'SUCCESS' in STATUS column.
Payload will be approx 500 rows in each call.
I have created below sample script:
PKG Specification :
CREATE OR REPLACE
PACKAGE process_data
IS
TYPE pass_data_rec
IS
record
(
p_eid employee.eid%type,
p_ename employee.ename%type,
p_salary employee.salary%type,
p_dept employee.dept%type
);
type p_data_tab IS TABLE OF pass_data_rec INDEX BY binary_integer;
PROCEDURE comp_data(inpt_data IN p_data_tab);
END;
PKG Body:
CREATE OR REPLACE
PACKAGE body process_data
IS
PROCEDURE comp_data (inpt_data IN p_data_tab)
IS
status VARCHAR2(10);
reason VARCHAR2(1000);
cnt1 NUMBER;
v_eid employee_copy.eid%type;
v_ename employee_copy.ename%type;
BEGIN
FOR i IN 1..inpt_data.count
LOOP
SELECT ec1.eid,ec1.ename,COUNT(*) over () INTO v_eid,v_ename,cnt1
FROM employee_copy ec1
WHERE ec1.eid = inpt_data(i).p_eid;
IF cnt1 > 0 THEN
IF (v_eid=inpt_data(i).p_eid AND v_ename = inpt_data(i).p_ename) THEN
UPDATE employee_copy SET status = 'SUCCESS' WHERE eid = inpt_data(i).p_eid;
ELSE
UPDATE employee_copy SET status = 'FAIL' WHERE eid = inpt_data(i).p_eid;
END IF;
ELSE
NULL;
END IF;
END LOOP;
COMMIT;
status :='success';
EXCEPTION
WHEN OTHERS THEN
status:= 'fail';
--reason:=sqlerrm;
END;
END;
But in this approach i have below mentioned issues.
Need to declare all local variables for each column value.
Need to compare all variable data using 'and' operator. Not sure whether it is correct way or not because if there are 50 columns then if condition will become very heavy.
IF (v_eid=inpt_data(i).p_eid AND v_ename = inpt_data(i).p_ename) THEN
Need to update REASON column when any column data mismatched (first mismatched column name) for that row, in this approach i am not able to achieve.
Please suggest any other good way to achieve this requirement.
Edit :
There is only one table at my end i.e target table. Input will come from any other source as collection object.
REVISED Answer
You could load the the records into t temp table, but unless you want additional processing it's not necessary. AFAIK there is no way to identify the offending column (first one only) without slugging through column-by-column. However, your other concern having to declare a variable is not necessary. You can declare a single variable defined as %rowtype which gives you access to each column by name.
Looping through an array of data to find the occasional error is just bad (imho) with SQL available to eliminate the good ones in one fell swoop. And it's available here. Even though your input is a array we can use as a table by using the TABLE operator, which allows an array (collection) as though it were a database table. So the MINUS operator can till be employed. The following routine will set the appropriate status and identify the first miss matched column for each entry in the input array. It reverts to your original definition in package spec, but replaces the comp_data procedure.
create or replace package body process_data
is
procedure comp_data (inpt_data in p_data_tab)
is
-- define local array to hold status and reason for ecah.
type status_reason_r is record
( eid employee_copy.eid%type
, status employee_copy.status%type
, reason employee_copy.reason%type
);
type status_reason_t is
table of status_reason_r
index by pls_integer;
status_reason status_reason_t := status_reason_t();
-- define error array to contain the eid for each that have a mismatched column
type error_eids_t is table of employee_copy.eid%type ;
error_eids error_eids_t;
current_matched_indx pls_integer;
/*
Helper function to identify 1st mismatched column in error row.
Here is where we slug our way through each column to find the first column
value mismatch. Note: There is actually validate the column sequence, but
for purpose here we'll proceed in the input data type definition.
*/
function identify_mismatch_column(matched_indx_in pls_integer)
return varchar2
is
employee_copy_row employee_copy%rowtype;
mismatched_column employee_copy.reason%type;
begin
select *
into employee_copy_row
from employee_copy
where employee_copy.eid = inpt_data(matched_indx_in).p_eid;
-- now begins the task of finding the mismatched column.
if employee_copy_row.ename != inpt_data(matched_indx_in).p_ename
then
mismatched_column := 'employee_copy.ename';
elsif employee_copy_row.salary != inpt_data(matched_indx_in).p_salary
then
mismatched_column := 'employee_copy.salary';
elsif employee_copy_row.dept != inpt_data(matched_indx_in).p_dept
then
mismatched_column := 'employee_copy.dept';
-- elsif continue until ALL columns tested
end if;
return mismatched_column;
exception
-- NO_DATA_FOUND is the one error that cannot actually be reported in the customer_copy table.
-- It occurs when an eid exista in the input data but does not exist in customer_copy.
when NO_DATA_FOUND
then
dbms_output.put_line( 'Employee (eid)='
|| inpt_data(matched_indx_in).p_eid
|| ' does not exist in employee_copy table.'
);
return 'employee_copy.eid ID is NOT in table';
end identify_mismatch_column;
/*
Helper function to find specified eid in the initial inpt_data array
Since the resulting array of mismatching eid derive from a select without sort
there is no guarantee the index values actually match. Nor can we sort to build
the error array, as there is no way to know the order of eid in the initial array.
The following helper identifies the index value in the input array for the specified
eid in error.
*/
function match_indx(eid_in employee_copy.eid%type)
return pls_integer
is
l_at pls_integer := 1;
l_searching boolean := true;
begin
while l_at <= inpt_data.count
loop
exit when eid_in = inpt_data(l_at).p_eid;
l_at := l_at + 1;
end loop;
if l_at > inpt_data.count
then
raise_application_error( -20199, 'Internal error: Find index for ' || eid_in ||' not found');
end if;
return l_at;
end match_indx;
-- Main
begin
-- initialize status table for each input enter
-- additionally this results is a status_reason table in a 1:1 with the input array.
for i in 1..inpt_data.count
loop
status_reason(i).eid := inpt_data(i).p_eid;
status_reason(i).status :='SUCCESS';
end loop;
/*
We can assume the majority of data in the input array is valid meaning the columns match.
We'll eliminate all value rows by selecting each and then MINUSing those that do match on
each column. To accomplish this cast the input with TABLE function allowing it's use in SQL.
Following produces an array of eids that have at least 1 column mismatch.
*/
select p_eid
bulk collect into error_eids
from (select p_eid, p_ename, p_salary, p_dept from TABLE(inpt_data)
minus
select eid, ename, salary, dept from employee_copy
) exs;
/*
The error_eids array now contains the eid for each miss matched data item.
Mark the status as failed, then begin the long hard process of identifying
the first column causing the mismatch.
The following loop used the nested functions to slug the way through.
This keeps the main line logic clear.
*/
for i in 1 .. error_eids.count -- if all inpt_data rows match then count is 0, we bypass the enttire loop
loop
current_matched_indx := match_indx(error_eids(i));
status_reason(current_matched_indx).status := 'FAIL';
status_reason(current_matched_indx).reason := identify_mismatch_column(current_matched_indx);
end loop;
-- update employee_copy with appropriate status for each row in the input data.
-- Except for any cid that is in the error eid table but doesn't exist in the customer_copy table.
forall i in inpt_data.first .. inpt_data.last
update employee_copy
set status = status_reason(i).status
, reason = status_reason(i).reason
where eid = inpt_data(i).p_eid;
end comp_data;
end process_data;
There are a couple other techniques used you may want to look into if you are not familiar with them:
Nested Functions. There are 2 functions defined and used in the procedure.
Bulk Processing. That is Bulk Collect and Forall.
Good Luck.
ORIGINAL Answer
It is NOT necessary to compare each column nor build a string by concatenating. As you indicated comparing 50 columns becomes pretty heavy. So let the DBMS do most of the lifting. Using the MINUS operator does exactly what you need.
... the MINUS operator, which returns only unique rows returned by the
first query but not by the second.
Using that this task needs only 2 Updates: 1 to mark "fail", and 1 to mark "success". So try:
create table e( e_id integer
, col1 varchar2(20)
, col2 varchar2(20)
);
create table stage ( e_id integer
, col1 varchar2(20)
, col2 varchar2(20)
, status varchar2(20)
, reason varchar2(20)
);
-- create package spec and body
create or replace package process_data
is
procedure comp_data;
end process_data;
create or replace package body process_data
is
package body process_data
procedure comp_data
is
begin
update stage
set status='failed'
, reason='No matching e row'
where e_id in ( select e_id
from (select e_id, col1, col2 from stage
except
select e_id, col1, col2 from e
) exs
);
update stage
set status='success'
where status is null;
end comp_data;
end process_data;
-- test
-- populate tables
insert into e(e_id, col1, col2)
select (1,'ABC','def') from dual union all
select (2,'No','Not any') from dual union all
select (3,'ok', 'best ever') from dual union all
select (4,'xx','zzzzzz') from dual;
insert into stage(e_id, col1, col2)
select (1,'ABC','def') from dual union all
select (2,'No','Not any more') from dual union all
select (4,'yy', 'zzzzzz') from dual union all
select (5,'no e','nnnnn') from dual;
-- run procedure
begin
process_data.comp_date;
end;
-- check results
select * from stage;
Don't ask. Yes, you to must list every column you wish compared in each of the queries involved in the MINUS operation.
I know the documentation link is old (10gR2), but actually finding Oracle documentation is a royal pain. But the MINUS operator still functions the same in 19c;
I have a table that i'm trying to populate via a plsql script (runs on plsql developer). The actual DML statement
is contained in a procedure inside a package. The procedure only inserts if the record doesn't exist yet.
It doesn't work. The part that checks for existence returns true after the first iteration of the script loop even if it doesn't actually exist in the table.
If i put the commit outside of the loop, nothing gets inserted at all and the existence checks return true for all iteration even if the table it empty.
When i try to simplify the insert with existence check to be in just one statement without the exception handling, i get the same outcome.
Please tell me what I'm doing wrong here.
CREATE OR REPLACE PACKAGE BODY some_package
IS
PROCEDURE add_to_queue(id IN NUMBER)
IS
pending_record VARCHAR2(1);
BEGIN
-- this part succeeds even if nothing matches the criteria
-- during the loop in the outside script
SELECT 'Y'
INTO pending_record
FROM dual
WHERE EXISTS (SELECT 'x' FROM some_queue smq
WHERE smq.id = id AND smq.status IS NULL);
EXCEPTION
WHEN NO_DATA_FOUND THEN
INSERT INTO some_queue (seqno, id, activity_date)
VALUES (some_sequence.nextval, id, SYSDATE);
WHEN OTHERS THEN
NULL;
END;
END some_package;
CREATE TABLE some_queue
(
seqno VARCHAR2(500) NOT NULL,
id NUMBER NOT NULL,
activity_date DATE NOT NULL,
status VARCHAR2(25),
CONSTRAINT some_queue_pk PRIMARY KEY (seqno)
);
-- script to randomly fill in the table with ids from another table
declare
type ids_coll_tt is table of number index by pls_integer;
ids_coll_table ids_coll_tt;
cursor ids_coll_cur is
select tab.id
from (select *
from ids_source_table
order by dbms_random.value ) tab
where rownum < 10;
begin
open ids_coll_cur;
fetch ids_coll_cur bulk collect into ids_coll_table;
close ids_coll_cur;
for x in 1..ids_coll_table.count
loop
some_package.add_to_queue(ids_coll_table(x));
commit; -- if this is here, the first iteration gets inserted
end loop;
-- commit; -- if the commit is done here, nothing gets inserted
end;
Note: I translated this code to be more generic for posting. Forgive me if there are any typos.
Update: even if i put everything inside the script and not use the package, i'm not able to properly check for existence and I get the same results.
I figured out the solution:
CREATE OR REPLACE PACKAGE BODY some_package
IS
PROCEDURE add_to_queue(p_id IN NUMBER)
IS
pending_record VARCHAR2(1);
BEGIN
-- this part succeeds even if nothing matches the criteria
-- during the loop in the outside script
SELECT 'Y'
INTO pending_record
FROM dual
WHERE EXISTS (SELECT 'x' FROM some_queue smq
WHERE smq.id = p_id AND smq.status IS NULL);
EXCEPTION
WHEN NO_DATA_FOUND THEN
INSERT INTO some_queue (seqno, id, activity_date)
VALUES (some_sequence.nextval, p_id, SYSDATE);
WHEN OTHERS THEN
NULL;
END;
END some_package;
changing the parameter name fixed it. I guess the compiler gets confused if it's the same name as the table field.
Don't name the parameter the same as the column (use a prefix like p_ or in_) and you can do it in a single statement if you use a MERGE statement self-joining on the ROWID pseudo-column:
CREATE OR REPLACE PACKAGE BODY some_package
IS
PROCEDURE add_to_queue(
in_id IN NUMBER
)
IS
BEGIN
MERGE INTO some_queue dst
USING ( SELECT ROWID AS rid
FROM some_queue
WHERE id = in_id
AND status IS NULL ) src
ON ( src.rid = dst.ROWID )
WHEN NOT MATCHED THEN
INSERT (seqno, id, activity_date)
VALUES (some_sequence.nextval, in_id, SYSDATE);
END;
END some_package;
Table 1
ID
----------
1
2
3
4
5
Table 2
ID Desc
------------------------------
A1 Apple
A2 Pear
A3 Orange
I am trying to create a Function in Oracle, so that it add the prefix 'A' in Table 1, and after that I want to look up in Table 2 to get the DESC returned. It has to be a function.
Thank you!!!
You may use the following for creation of such a function :
Create or Replace Function Get_Fruit( i_id table2.description%type )
Return table2.description%type Is
o_desc table2.description%type;
Begin
for c in ( select description from table2 where id = 'A'||to_char(i_id) )
loop
o_desc := c.description;
end loop;
return o_desc;
End;
where
no need to include exception handling, because of using cursor
instead of select into clause.
using table_name.col_name%type for declaration of data types for
arguments or variables makes the related data type of the columns
dynamic. i.e. those would be able to depend on the data type of the
related columns.
the reserved keywords such as desc can not be used as column names
of tables, unless they're expressed in double quotes ("desc")
To call that function, the following might be preferred :
SQL> set serveroutput on
SQL> declare
2 i_id pls_integer := 1;
3 o_fruit varchar2(55);
4 begin
5 o_fruit := get_fruit( i_id );
6 dbms_output.put_line( o_fruit );
7 end;
8 /
Apple
PL/SQL procedure successfully completed
I am not sure with your question- Are you trying to achieve something like this:-
CREATE OR REPLACE FUNCTION Replace_Value
(
input_ID IN VARCHAR2
) RETURN VARCHAR2
AS
v_ID varchar(2);
BEGIN
begin
SELECT distinct a.ID into v_id from Table 2 a where a.ID in (select 'A'||b.id from table1 b where b.id=input_ID);
exception
when others then
dbms_output.put_line(sqlcode);
end;
RETURN v_id;
END Replace_Value;
Are you trying for something like this?
CREATE OR replace FUNCTION replace_value (table_name IN VARCHAR2,
input_id IN INTEGER)
RETURN VARCHAR2
AS
v_desc VARCHAR(20);
BEGIN
SELECT descr
INTO v_desc
FROM table2
WHERE id = 'A' || input_id
AND ROWNUM = 1; -- only needed if there are multiple rows for each id.
RETURN v_desc;
END replace_value;
You may also add an exception handling for NO_DATA_FOUND or INVALID_NUMBER
I am trying to use a cursor here, I would like to know how to i access the cursor field in the select column?
I have an implementation as below,
create or replace TYPE "TABLE_TYPE_SAMPLE" AS OBJECT(
ENTITY_NAME VARCHAR2(100)
);
create or replace TYPE "TABLE_SAMPLE" AS TABLE OF TABLE_TYPE_SAMPLE;
CREATE OR REPLACE FUNCTION segmentFields(
txnId VARCHAR2)
RETURN TABLE_SAMPLE
IS
attValue VARCHAR2(20);
curStr VARCHAR2(20);
flexTable TABLE_SAMPLE := TABLE_TYPE_SAMPLE();
CURSOR cur_seg
IS
(SELECT colA
FROM table1 -- (table name has column colA)
WHERE id = txnId
);
BEGIN
FOR cur_recd IN cur_seg
LOOP
curStr := cur_recd.colA;
SELECT curStr into attValue FROM PER_PEOPLE_GROUPS;
flexTable.EXTEND;
flexTable(flexTable.count) := (TABLE_TYPE_SAMPLE(attValue)) ;
END LOOP;
RETURN flexTable;
END;
The function complied without errors. but when I try to run below query
select * from table(segmentFields(480));
I get the below error,
ORA-01422: exact fetch returns more than requested number of rows
ORA-06512: at "SEGMENTFIELDS", line 19
01422. 00000 - "exact fetch returns more than requested number of rows"
*Cause: The number specified in exact fetch is less than the rows returned.
*Action: Rewrite the query or change number of rows requested
I want to understand, what is wrong with this implementation.
Thank you.
The problem is with the select into. Not sure why that's there in the first place. The value from your cursor is available in cur_recd.cola and you can use it directly.
create or replace function segmentfields(txnid varchar2) return table_sample is
flextable table_sample := table_type_sample();
cursor cur_seg is(
select cola
from table1 -- (table name has column colA)
where id = txnid);
begin
for cur_recd in cur_seg
loop
flextable.extend;
flextable(flextable.count) := (table_type_sample(cur_recd.cola));
end loop;
return flextable;
end;
This query has no WHERE clause:
SELECT curStr into attValue FROM PER_PEOPLE_GROUPS;
That means it will return hits for all the rows in PER_PEOPLE_GROUPS. The SELECT ... INTO construct populates a single variable and so requires a query which returns exactly one row. The ORA-01422 message indicates that you're not executing an exact fetch, obviously because PER_PEOPLE_GROUPS has more than one row.
Several possible solutions, depending on what you're trying to achieve:
Add a restriction of some kind so that you only return one row from PER_PEOPLE_GROUPS.
Use BULK COLLECT to populate any array instead.
Replace the SELECT with a simple assignment flexTable(flexTable.count) := (TABLE_TYPE_SAMPLE(cur_recd.colA))
On the face of it, discarding the SELECT seems the best option as it doesn't provide you with any information. However, it also seems likely that you are trying to implement some other business logic which isn't expressed in the posted code, so probably you need to make several changes.
error in row:
SELECT curStr into attValue FROM PER_PEOPLE_GROUPS;
that executes the code? how many rows in PER_PEOPLE_GROUPS?
error indicates that more than one. You may need to put a condition in where clause?
I am having trouble creating a function that returns multiple rows. I am trying to use a loop but I still get the "oracle exact fetch returns more than requested" error. Any help pointing me in the correct direction would be greatly appreciated.
CREATE OR REPLACE FUNCTION sections2
(
id_param NUMBER
)
RETURN VARCHAR
AS
sections_param VARCHAR(40);
BEGIN
LOOP
SELECT sections
INTO sections_param
FROM table2
WHERE id = id_param;
RETURN sections_param;
end loop;
END;
/
It sounds like you want a function that returns a collection. I'll show an example of returning a nested table
-- Use whatever length is appropriate here.
CREATE TYPE sections_tbl
IS TABLE OF VARCHAR2(40);
CREATE OR REPLACE FUNCTION sections2 (
id_param NUMBER
)
RETURN sections_tbl
AS
l_sections sections_tbl;
BEGIN
SELECT sections
BULK COLLECT INTO l_sections
FROM table2
WHERE id = id_param;
RETURN l_sections;
END;
In the caller, you'd do something like
DECLARE
l_sections sections_tbl := sections2( <<id>> );
BEGIN
FOR i IN 1 .. l_sections.count
LOOP
dbms_output.put_line( l_sections(i) );
END LOOP;
END;