PL/SQL column names in cursor variable

Hi,
I try to put all column names of a table in a cursor variable?? without the values, just the column names.
Can somebody help me, because I really don't know how to do this.
Thanks,
Moni

Hi Jes,
my table looks like this: T1
columnNames: id | col1 | col2 | col3 | col4 | col5
Values: a | b | c| d| e| f
the number of the columns depend on a how many rows in another table (T2) are entered. If a new row is entered in T2, I have to add a column in table T1.
and then I have to look what is the new row, compare it with all my existing columnnames in T1 and add the right one.
my vector should look like this:
c1:
id
col1
col2
col3
col4
col5
I hope you know what I mean, it is not very easy to describe!
Thanks for helping me!
Moni

Similar Messages

Getting column names from cursor

Hi all
I have procedure which produces list of applied for jobs web page(using htp. package)
I got result in cursor, but have to provide dinamic sort, based on colimn pressed
procedure my_application_list
(pi_resume_num     in varchar2 default null
,pi_sort_col     in varchar2 default null
,pi_page_no     in varchar2 default null
,pi_action     in varchar2 default null
,pi_msg          in varchar2 default null
is
CURSOR cur_job IS
     SELECT      jtl.JOB_TITLE
          ,jtl.COMPANY_NAME
          ,a.APPLY_DATE
          ,a.lang
          ,a.job_id
     FROM job_tl jtl, applied_for_job a, gateway gt
     WHERE a.job_seeker_id=app.job_Seeker
     AND a.job_id=jtl.job_id
     AND a.lang=jtl.lang
     AND a.gateway=gt.gateway
     AND jtl.lang=(SELECT substr(MIN(lt.order_list||jtl0.lang),2) lang
               FROM      job_tl jtl0
                    ,language_tl lt
               WHERE jtl0.job_id = a.job_id
               AND jtl0.lang=lt.lang
               AND lt.gui_lang=app.language)
     ORDER BY pi_sort_col
rest of code
The columns displayed in web page are Job_title, Company_name and Applied_date
This page is displyed well, bu without column nmes at the top. I am trying to get column names from cursor in order to have ORDER BY <pi_sort_col>
can someone help how i can get those column names:Job_title, Company_name and Applied_date
User will be able to click on column and sort
Thank in advance .I appreciate any help

Hi Francisco
Here is my code
CREATE OR REPLACE PACKAGE BODY cc_web_application_list
IS
TYPE COL_NAME_LIST IS TABLE OF VARCHAR2(100)
     INDEX BY BINARY_INTEGER;
TYPE COL_ORDER_LIST IS TABLE OF VARCHAR2(30)
     INDEX BY BINARY_INTEGER;
col_name_t col_name_list;
col_order_t col_order_list;
procedure my_application_list
     (pi_resume_num     in varchar2 default null
     ,pi_sort_col     in varchar2 default null
     ,pi_page_no     in varchar2 default null
     ,pi_action     in varchar2 default null
     ,pi_msg          in varchar2 default null
is
l_my_page_no      PLS_INTEGER :=     TO_NUMBER(nvl(pi_page_no,1));
l_js_name          gam_user.username%TYPE;
l_js_first_name          gam_user.first_name%TYPE;
l_cnt                PLS_INTEGER := 0;
l_scr_lines      PLS_INTEGER := 0;
l_curline           PLS_INTEGER;
l_jobs_applied           PLS_INTEGER;
l_total_rec      PLS_INTEGER;
l_total_pages      PLS_INTEGER;
l_pos               PLS_INTEGER;
l_first               PLS_INTEGER :=0;
last                PLS_INTEGER :=0;
l_lines           PLS_INTEGER := 10;
col_name      VARCHAR2(100) := col_name_t(3) ;
col_order           VARCHAR2(30) := 'DESC';
str                VARCHAR2(2000);
TYPE display_rec IS TABLE OF VARCHAR2(500) INDEX BY BINARY_INTEGER;
display           display_rec;
TYPE page_table_type IS TABLE OF PLS_INTEGER INDEX BY BINARY_INTEGER;
page_number          page_table_type;
CURSOR cur_job IS
     SELECT      jtl.JOB_TITLE job_title
          ,jtl.COMPANY_NAME company_name
          ,a.APPLY_DATE apply_date
          ,a.lang
          ,a.job_id
     FROM job_tl jtl, applied_for_job a, gateway gt
     WHERE a.job_seeker_id=app.job_Seeker
     AND a.job_id=jtl.job_id
     AND a.lang=jtl.lang
     AND a.gateway=gt.gateway
     ORDER BY a.apply_date;
This decode is a problem
          decode(col_order,'ASC'
               ,decode(col_name
               ,col_name_t(1), jtl.job_title
               ,col_name_t(2), jtl.company_name
               ,col_name_t(3), TO_CHAR(a.apply_date, 'YYYYMMDDhh24miss')
               ,a.apply_date)
               ) ASC
          ,decode(col_order,'DESC'
               ,decode(col_name
               ,col_name_t(1), jtl.job_title
               ,col_name_t(2), jtl.company_name
               ,col_name_t(3), TO_CHAR(a.apply_date, 'YYYYMMDDhh24miss')
               ,a.apply_date)
               ) DESC
          ,a.apply_date
TYPE rec_one IS TABLE OF cur_job%ROWTYPE INDEX BY BINARY_INTEGER;
r               rec_one;
BEGIN
BEGIN
SELECT username,first_name
INTO l_js_name,l_js_first_name
FROM gam_user
WHERE user_id = App.job_seeker;
EXCEPTION
WHEN OTHERS THEN NULL;
END;
Cc_Pkg_Elements.p_page_top_job_seeker(
'Personal Job List'
,REPLACE(Txt_Proc_My_Joblist.title_job_list
     ,'##first_name##',l_js_first_name),'N' ,TRUE ,'Pxx');
----- get numer of records returned by query
SELECT COUNT(1)
INTO l_total_rec
FROM     job_tl jtl,applied_for_job a
     ,gateway gt
WHERE a.job_id = jtl.job_id
AND     a.job_seeker_id     = App.job_seeker
AND     a.gateway     = gt.gateway ;
------get number of pages
l_total_pages:=CEIL (l_total_rec/l_lines);
l_jobs_applied := 0;
col_name := pi_sort_col;
col_order := pi_sort_col;
--get first positions
l_first := (nvl(l_my_page_no,1) - 1) * l_lines + 1;
FOR rec IN cur_job LOOP
     l_cnt := l_cnt + 1;
     EXIT WHEN l_cnt > l_first + l_lines - 1;
     IF l_cnt >= l_first THEN
          l_scr_lines := l_scr_lines + 1;
          r(l_scr_lines) := rec;          --assign counter from loop to r index
          IF rec.apply_date IS NOT NULL THEN
          l_jobs_applied := l_jobs_applied + 1;
          END IF;
     END IF;
END LOOP;
htp.p('<FORM ACTION="'||App.gateway||'8.my_application_list" METHOD="post">');
htp.p('<table align="center">');
htp.p('<tr><td>');
IF r.COUNT = 0 THEN
     Web_Pkg_Elements.doc_msg(Txt_Proc_My_Joblist.no_jobs);
END IF;
htp.p('</td></tr>');
htp.p('</table>');
--table_heading(col_name ,col_order );
htp.p('<table align=center>');
htp.p('<tr align="center"><td>');
FOR i IN 1..l_total_pages LOOP
     page_number(i) := i;
     IF page_number(i) = l_total_pages THEN
          htp.p('');
||'');
          Web_Pkg_Elements.doc_val_small(page_number(i)||'</A>');
     ELSE
     htp.p('');
|'||'');
     Web_Pkg_Elements.doc_val_small(page_number(i)||' |'||'</A>');
     END IF;
END LOOP;
htp.p('</td></tr>');
htp.p('</table>');
htp.p('<table align=center>');
FOR l_curline IN 1..l_scr_lines LOOP
     display(1) := NVL(r(l_curline).job_title, '<br>');
     display(2) := NVL(r(l_curline).company_name, '<br>');
     display(3) := NVL(Cc_Pkg_Nls.date2char(r(l_curline).apply_date, App.date_format), '<br>');
     IF MOD(l_curline, 2) = 0 THEN
          Cc_Pkg_Elements.tr_even;
     ELSE
          Cc_Pkg_Elements.tr_odd;
     END IF;
     htp.p('<td>');
     htp.p('');
     Web_Pkg_Elements.doc_val(display(1)||'');
     htp.p('</td>');
     htp.p('<td>');
     Web_Pkg_Elements.doc_val(display(2));
     htp.p('</td>');
     htp.p('     <td>');
     Web_Pkg_Elements.doc_val(display(3));
     htp.p('     </td>');
htp.p('</tr>');
END LOOP;
htp.p('</TABLE>');
htp.p('<TABLE width="88%" BORDER="0" CELLPADDING="0" CELLSPACING="0"
               align="center">');
htp.p('<tr valign=bottom>');
htp.p('<TD colspan=2 align=right>');
IF l_my_page_no > 1 THEN
     htp.p('<P>'||'<IMG SRC="'||App.image||'prev.gif" ALT="'
     ||Txt_Proc_My_Joblist.prev
     ||'"'     ||' HEIGHT=20 BORDER=0 ALIGN=bottom '
     ||'hspace=2>');
END IF;
IF l_my_page_no < CEIL (l_total_rec/l_lines) THEN
     htp.p(' <a href="'||
     web_pkg_elements.link$$(App.gateway||'8.my_application_list?'
     ||'pi_sort_col='||Web_Pkg_Elements.replace_in_url(pi_sort_col)
     ||'&pi_msg=&pi_page_no='||TO_CHAR(l_my_page_no + 1)
     ||">'||'<IMG SRC="'||App.image||'next.gif" ALT="'
     ||Txt_Proc_My_Joblist.NEXT
     ||'"' ||' HEIGHT=20 BORDER=0 ALIGN=bottom '
     ||'hspace=2></a>');
END IF;
htp.p('</TD>');
htp.p('</TR>');
htp.p('     </TABLE>');
htp.formHidden('pi_sort_col', pi_sort_col);
htp.formHidden('pi_page_no', pi_page_no);
htp.p('</FORM>');
END my_application_list;
END ; --cc_pkg_application_list

Column name as a variable !!!!!!!!!!!!!!!!!!!!

hi All,
please I would like to write a query such that the column names is to be variables.
"select &C1, &C2 from T1 ;" it's working in sql developer but it's not working on apex region.
thanks a lot.

Actually, the ADF Faces demo site from Oracle looks (potentially) really cool. I have no idea how it works in the background though so it could be a nightmare. I'd appreciate it if you would post back here once you've given it a try. I'd be genuinely interested to know what it's like to work with.
Its a bit funny because APEX seems to be coming on leaps and bounds but Oracle don't advertise it much (probably because it's free). That could well be a view that is tainted by being an active member of the community though so it would be intriguing to see what people 'from the outside, looking in' feel about it. You got many people there that have opinions about APEX? The java boys at the place I'm contracting at seem to look down on us with disdain!
Cheers
Ben

Having a column name as a variable within a query,Problem!!!!

I have a problem with a simple query shown below
SELECT * FROM DisneyWHERE Upper(COLNAME) LIKE UPPER('%' || SEARCHSTRING || '%');SELECT * FROM Disney
WHERE Upper(COLNAME) LIKE UPPER('%' || SEARCHSTRING || '%');
My problem, The colname variable is not being recognised as a column name for example
A user can select to view a set of characters from the DB by username, movies, etc etc (they select this from a combobox) They then enter a search string(textbox)
colname = username
Searchstring = pluto
SELECT * FROM Disney
WHERE Upper(COLNAME) LIKE UPPER('%' || SEARCHSTRING || '%');
The problem is orac;e does not seem to be picking up that colname is a column name and seems to be doing a simple comparison. To make this clearer
it' seems to be trying to match username = pluto
rather than finding pluto in the username column.
Has anyone got any ideas how i can get around this. I have a strange feeling it is something to do with dynamic pl/sql but i am new to oracle so i have no idea how to write dynamic queries. Any help would be muchly appreciated
I am using oracle 11g and visual studio .net 2005

user10372910 wrote:
If you can refer me to any material you think i would find helpful to read or experiment with pls let me knowThe online documentation is a good place to look...
http://www.oracle.com/pls/db102/homepage?remark=tahiti
Start with the concepts guide which gives a good background to the Oracle database.
Look up "bind variables", "hard parsing"/"soft parsing" of queries
In light of what boneist highlighted, you may also want to do a search for "function based indexes".
Those topics should give you some insight into the performance issues around queries and why it is better to write SQL that uses bind variables and get's soft parsed (re-usable SQL) rather than writing dynamic queries that become hard parsed (non-reusable SQL).

Column name as a variable in a database trigger

I am trying to code a pre-insert database trigger to format all varchar2 columns entered into the triggering table. I am using a cursor to get all the relevant column names from all_tab_columns, but do not know how to refer to these values in combination with the ":new" construct within my code. The example below is a very simplified version of what I am trying to do ( it obviously will not work as it is):
declare
cursor column_cur is
select column_name cn
from all_tab_columns
where table_name = 'TEMP_ASSESSMENT'
and data_type = 'VARCHAR2';
v_columnname varchar2(30);
begin
for column_rec in column_cur loop
v_columnname := column_rec.cn;
:new.v_columnname := upper(:new.v_columnname); declare
cursor column_cur is
select column_name cn
from all_tab_columns
where table_name = 'TABLE_X'
and data_type = 'VARCHAR2';
v_columnname varchar2(30);
begin
for column_rec in column_cur loop
v_columnname := column_rec.cn;
:new.v_columnname := upper(:new.v_columnname);
end loop;
end;

Seems to me like the problem in this thread:
http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:59412348055
C.

Oracle pl/SQl column name in 01/sat, 02/sun ....31/mon according to month

print column name according to month i.e 01/sat,02/sun......,30/sun,31/mon
like if i pass jan 2011
then table column name is like
01/sat 02/sun 03/mon 04/tue ...... 30/sun 31/mon

Welcome to the forums!
It is always helpful to provide the following:
1. Oracle version (SELECT * FROM V$VERSION)
2. Sample data in the form of CREATE / INSERT statements.
3. Expected output
4. Explanation of expected output (A.K.A. "business logic")
5. Use \ tags for #2 and #3. See FAQ (Link on top right side) for details.

How to concatenate column name in PL/SQL

Here is ex.
I want to execute like this
for i in 1 .. 18 loop
EXECUTE IMMEDIATE 'select qty_sz'||i||' from table1';
end loop;
I mean Can I cancatenate column name with a variable?
your advice is gretly Appeciated.
Ram.

It would be a lot easier to diagnose your problem if you posted the error message. Oracle has an awful lot of error messages.
I thing I have noticed is this:
EXECUTE IMMEDIATE mysql into var1 using 'qty_sz'||i ;
You have an implicit datatype conversion there, i being a number and you can only concatenate varchar variables. There is a little wrinkle in this, in that to_char seems to put a space in front of any number. So try this:
EXECUTE IMMEDIATE mysql into var1 using 'qty_sz'||ltrim(to_char(i));
and see if it makes any difference.
Another problem will be if your columns are like this: qty_sz01, qty_sz02,...qty_sz8. because the default mask doesn't incude the leading zero so in that case you should specify the mask in the to_char(i, '09')
If neither of those fixes your problem post the your error message.
rgds, APC

Variable and column name

Hi all,
In an interface, I've got a column which has the same name as a variable.
When I execute it in ODI 10g all is fine.
With ODI 11g, it replace the column name by the variable one. If the variable has no value, I've got an SQLException.
I believe it comes from the colon.
In the execution code, I have
INSERT ... VALUES PROJECT.NAME instead of NAME.
I assume that ODI interprets the NAME with the variable name instead of the column name.
Has anyone experienced it ?
Thanks.

Hi,
I just tried to reproduce your issue, I didn't experience the case where ODI takes variable name instead of column name. ODI should be able to differentiate between column name and variable name with '#' Symbol prefixed to it. Any name prefixed with #, ODI thinks thats a variable and, it need to be declared in a package.
In your case, looks like issue is not with the NAME, its with variable having no value. May be that ODI 10g has a default value. However, if a variable has no value, its definitely going to fail the process.
Regards,
K

Use variable in SQL for column name

Hi All,
We want to use a user input as a column name in APEX.
For e.g user will enter "ALLOWABLE_AMOUNT" then the query will be as follows :
select Rule,rule_name,rule_desc,"User Input" from rule_dim
where "User_input" > 100
So here the User_input will be substitued with Allowable_amount. Is this doable using any bind/substitution variables ? I tried ":P2_USER_VARIABLE" and "&P2_USER_VARIABLE." but did not work.
Please advice.

Hi Andy,
You do that with an Interactive Report and a Dynamic Action.
I'll assume that you're using APEX 4.2
Here's how:
Create Page 2 with an Interactive Report
Create New Page > Report > Interactive Report > Next > Next
Enter a SQL Select statement: select Rule,rule_name,rule_desc from rule_dim
Next > Create > Edit Page
Create the item P2_USER_VARIABLE
Add Item > Number Field > Next
Item Name: P2_USER_VARIABLE
Next > Next > Next
Source Used: Always, replacing any existing value in session state
Source Type: Static Assignment (value equals source attribute)
Create Item
Create a Dynamic Action to refresh the Interactive Report when P2_USER_VARIABLE is changed
Add Dynamic Action
Name: Refresh IRR
Next >
Event: Lose Focus
Selection Type: Item(s)
Item(s): P2_USER_VARIABLE
Next >
Action: Refresh
Next >
Selection Type: Region
Region: Report 1 (10)
Create Dynamic Action
Add the ALLOWABLE_AMOUNT to the Interactive Report
Report 1
Region Source: SELECT * FROM (select Rule,rule_name,rule_desc, :P2_USER_VARIABLE AS ALLOWABLE_AMOUNT from rule_dim) WHERE ALLOWABLE_AMOUNT > 100
Apply Changes > Apply Changes
Get the Interactive Report to submit P2_USER_VARIABLE
Report 1
Page Items to Submit: P2_USER_VARIABLE
Apply Changes
Change the Heading for ALLOWABLE_AMOUNT in the Interactive Report
Interactive Report
Change the Heading of ALLOWABLE_AMOUNT to &P2_USER_VARIABLE.
Apply Changes
Run
Enter something into the USER VARIABLE field and select something else on the page. Watch the last column update to that value.
Tim.

Can I use bind variable instaed of writing static COLUMN Name

Hi , I am having a table containing id and column names, the data is stored against that id in other tables. Now I wish to update data into another table so that it goes into apppropriate column without using decode function.
I am trying to do this:
EXECUTE IMMEDIATE 'update TEST set :1 = :2
where PROJECT_ID= :3 and UNIQUE_ID= :4' using P_DEST_COLUMN, P_TEXT_VALUE, P_PROJ_ID, P_TASK_UID;
the values P_DEST_COLUMN, P_TEXT_VALUE, P_PROJ_ID, P_TASK_UID are populated using a cursor in PL/SQl
Is this statement valid? If not can you tell me how to do it as I am getting some error I am unable to comprehend.
thanks
Rishabh

Column names cannot be substituted at run-time as bind variables. If you need to specify the column name at run-time, you'd need to construct a new string and execute that string dynamically, i.e.
EXECUTE IMMEDIATE 'UPDATE test SET ' || p_dest_column || ' = :1 ' || ...From a data model standpoint, storing column names as data elements in another table is generally a rather poor idea. It's likely to make ad-hoc reporting nearly impossible and to cause a lot more parsing than would otherwise be required.
Justin

Variable column name in a trigger

I have a table with many columns, and would like to make a log table of all the updates in the first one. So my idea was to bulid a "before update" trigger which would first create a cursor to get the column names from the user_tab_columns table. In a cursor loop it would check if the :new.column_data is somehow different from :old.column_data. If this was the case, trigger would build a sql statement for inserting old and new values into the log table, and then execute this statement using the "execute immediate".
Here i run into a problem, because i shuld pass the old and new values of a column instead of :new and :old variables, which are not bound in the execute immediate. Any suggestion besides writing a long trigger for checking each and every column name in a table?

Or don't create it like this at all.
This way you'll get:
- complex trigger code
- a hard parse each and every insert into that log table
- a trashed shared pool, because it gets populated with all "almost the same" insert statements
Querying a log table probably is not something you do everyday, so it likely doesn't pay to store it in a complex way to make sure the retrieval goes smoothly.
If you want to log, you could do it in a single insert statement with all the information you could possibly need. This makes the code easy and the SQL sharable. It could look like below, and just skip the columns you don't need:
insert into log_table
( action
, action_date
, action_user
, column1_old_value
, column1_new_value
, did_column1_change
, column2_old_value
, column2_new_value
, did_column2_change
, columnN_old_value
, columnN_new_value
, did_columnN_change
values
( case when inserting then 'I' when updating then 'U' when deleting then 'D' end
, sysdate
, user
, :old.column1
, :new.column1
, case when updating('column1') then 'Y' else 'N' end
, :old.column2
, :new.column2
, case when updating('column1') then 'Y' else 'N' end
, :old.columnN
, :new.columnN
, case when updating('columnN') then 'Y' else 'N' end
);Or you can use a flashback archive instead of a log table in 11g, but I don't have enough experience with it yet to fully recommend that one.
Regards,
Rob.

Using column number inplace of column name in SQL Select statement

Is there a way to run sql select statements with column numbers in
place of column names?
Current SQL
select AddressId,Name,City from AddressIs this possible
select 1,2,5 from AddressThanks in Advance

user10962462 wrote:
well, ok, it's not possible with SQL, but how about PL/SQL?As mentioned, using DBMS_SQL you can only really use positional notation... and you can also use those positions to get the other information such as what the column is called, what it's datatype is etc.
CREATE OR REPLACE PROCEDURE run_query(p_sql IN VARCHAR2) IS
v_v_val     VARCHAR2(4000);
v_n_val     NUMBER;
v_d_val     DATE;
v_ret       NUMBER;
c           NUMBER;
d           NUMBER;
col_cnt     INTEGER;
f           BOOLEAN;
rec_tab     DBMS_SQL.DESC_TAB;
col_num     NUMBER;
v_rowcount NUMBER := 0;
BEGIN
-- create a cursor
c := DBMS_SQL.OPEN_CURSOR;
-- parse the SQL statement into the cursor
DBMS_SQL.PARSE(c, p_sql, DBMS_SQL.NATIVE);
-- execute the cursor
d := DBMS_SQL.EXECUTE(c);
-- Describe the columns returned by the SQL statement
DBMS_SQL.DESCRIBE_COLUMNS(c, col_cnt, rec_tab);
-- Bind local return variables to the various columns based on their types
FOR j in 1..col_cnt
LOOP
    CASE rec_tab(j).col_type
      WHEN 1 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_v_val,2000); -- Varchar2
      WHEN 2 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_n_val);      -- Number
      WHEN 12 THEN DBMS_SQL.DEFINE_COLUMN(c,j,v_d_val);     -- Date
    ELSE
      DBMS_SQL.DEFINE_COLUMN(c,j,v_v_val,2000); -- Any other type return as varchar2
    END CASE;
END LOOP;
-- Display what columns are being returned...
DBMS_OUTPUT.PUT_LINE('-- Columns --');
FOR j in 1..col_cnt
LOOP
    DBMS_OUTPUT.PUT_LINE(rec_tab(j).col_name||' - '||case rec_tab(j).col_type when 1 then 'VARCHAR2'
                                                                              when 2 then 'NUMBER'
                                                                              when 12 then 'DATE'
                                                     else 'Other' end);
END LOOP;
DBMS_OUTPUT.PUT_LINE('-------------');
-- This part outputs the DATA
LOOP
    -- Fetch a row of data through the cursor
    v_ret := DBMS_SQL.FETCH_ROWS(c);
    -- Exit when no more rows
    EXIT WHEN v_ret = 0;
    v_rowcount := v_rowcount + 1;
    DBMS_OUTPUT.PUT_LINE('Row: '||v_rowcount);
    DBMS_OUTPUT.PUT_LINE('--------------');
    -- Fetch the value of each column from the row
    FOR j in 1..col_cnt
    LOOP
      -- Fetch each column into the correct data type based on the description of the column
      CASE rec_tab(j).col_type
        WHEN 1 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_v_val);
                     DBMS_OUTPUT.PUT_LINE(rec_tab(j).col_name||' : '||v_v_val);
        WHEN 2 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_n_val);
                     DBMS_OUTPUT.PUT_LINE(rec_tab(j).col_name||' : '||v_n_val);
        WHEN 12 THEN DBMS_SQL.COLUMN_VALUE(c,j,v_d_val);
                     DBMS_OUTPUT.PUT_LINE(rec_tab(j).col_name||' : '||to_char(v_d_val,'DD/MM/YYYY HH24:MI:SS'));
      ELSE
        DBMS_SQL.COLUMN_VALUE(c,j,v_v_val);
        DBMS_OUTPUT.PUT_LINE(rec_tab(j).col_name||' : '||v_v_val);
      END CASE;
    END LOOP;
    DBMS_OUTPUT.PUT_LINE('--------------');
END LOOP;
-- Close the cursor now we have finished with it
DBMS_SQL.CLOSE_CURSOR(c);
END;
SQL> exec run_query('select empno, ename, deptno, sal from emp where deptno = 10');
-- Columns --
EMPNO - NUMBER
ENAME - VARCHAR2
DEPTNO - NUMBER
SAL - NUMBER
Row: 1
EMPNO : 7782
ENAME : CLARK
DEPTNO : 10
SAL : 2450
Row: 2
EMPNO : 7839
ENAME : KING
DEPTNO : 10
SAL : 5000
Row: 3
EMPNO : 7934
ENAME : MILLER
DEPTNO : 10
SAL : 1300
PL/SQL procedure successfully completed.
SQL> exec run_query('select * from emp where deptno = 10');
-- Columns --
EMPNO - NUMBER
ENAME - VARCHAR2
JOB - VARCHAR2
MGR - NUMBER
HIREDATE - DATE
SAL - NUMBER
COMM - NUMBER
DEPTNO - NUMBER
Row: 1
EMPNO : 7782
ENAME : CLARK
JOB : MANAGER
MGR : 7839
HIREDATE : 09/06/1981 00:00:00
SAL : 2450
COMM :
DEPTNO : 10
Row: 2
EMPNO : 7839
ENAME : KING
JOB : PRESIDENT
MGR :
HIREDATE : 17/11/1981 00:00:00
SAL : 5000
COMM :
DEPTNO : 10
Row: 3
EMPNO : 7934
ENAME : MILLER
JOB : CLERK
MGR : 7782
HIREDATE : 23/01/1982 00:00:00
SAL : 1300
COMM :
DEPTNO : 10
PL/SQL procedure successfully completed.
SQL> exec run_query('select * from dept where deptno = 10');
-- Columns --
DEPTNO - NUMBER
DNAME - VARCHAR2
LOC - VARCHAR2
Row: 1
DEPTNO : 10
DNAME : ACCOUNTING
LOC : NEW YORK
PL/SQL procedure successfully completed.
SQL>

How to access variable number of columns using ref cursor !

Hi,
I am trying to get variable number of columns using ref cursor.
Declare
mySzSql varchar2(2000);
Type dynSqlRC is Ref cursor;
current_cur dynSqlRC;
tbl_rec alt_42_consolidated%Rowtype;
Begin:
/* This works */
mySzSql := 'select *
from
Table1
Where
rowid = ''AAEWNEABXAAAAkxAAA''';
/* i want something like this to work, this is not working, giving missing variable name error */
mySzSql := 'select col1, col2, col3
from
Table1
Where
rowid = ''AAEWNEABXAAAAkxAAA''';
open current_cur for mySzSql;
fetch current_cur into tbl_rec;
close current_cur;
End;
I do have the list of desired columns which I am looking to fetch, so after taking that in the record type, how should i get their values. Is it possible to traverse tbl_rec declared above and if column name matches then I will store the value in the array and finally return this array.
Can somebody please tell me how to do this.
Thanks

It appears that this is a followup to How to loop through columns selected by select clause which is itself a followup to [url="
How to execute dynamic sql"]this earlier thread.
Assuming these are intended to be followup questions, can we please stick to a single thread? That makes it a lot easier to understand the situation and follow the conversation. Starting multiple threads makes it harder to follow the conversation.
Thanks,
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

How to use the column names generated from Dynamic SQL

Hi,
I have a problem with Dynamic SQL.
I have written an SQL which will dynamically generate the Select statement with from and where clause in it.
But that select statement when executed will get me hundreds of rows and i want to insert each row separately into one more table.
For that i have used a ref cursor to open and insert the table.
In the select list the column names will also be as follows: COLUMN1, COLUMN2, COLUMN3,....COLUMNn
Please find below the sample code:
TYPE ref_csr IS REF CURSOR;
insert_csr ref_csr;
v_select VARCHAR2 (4000) := NULL;
v_table VARCHAR2 (4000) := NULL;
v_where VARCHAR2 (4000) := NULL;
v_ins_tab VARCHAR2 (4000) := NULL;
v_insert VARCHAR2 (4000) := NULL;
v_ins_query VARCHAR2 (4000) := NULL;
OPEN insert_csr FOR CASE
WHEN v_where IS NOT NULL
THEN 'SELECT '
|| v_select
|| ' FROM '
|| v_table
|| v_where
|| ';'
ELSE 'SELECT ' || v_select || ' FROM ' || v_table || ';'
END;
LOOP
v_ins_query :=
'INSERT INTO '
|| v_ins_tab
|| '('
|| v_insert
|| ') VALUES ('
|| How to fetch the column names here
|| ');';
EXECUTE IMMEDIATE v_ins_query;
END LOOP;
Please help me out with the above problem.
Edited by: kumar0828 on Feb 7, 2013 10:40 PM
Edited by: kumar0828 on Feb 7, 2013 10:42 PM

>
I Built the statement as required but i need the column list because the first column value of each row should be inserted into one more table.
So i was asking how to fetch the column list in a ref cursor so that value can be inserted in one more table.
>
Then add a RETURNING INTO clause to the query to have Oracle return the first column values into a collection.
See the PL/SQL Language doc
http://docs.oracle.com/cd/B28359_01/appdev.111/b28370/returninginto_clause.htm#sthref2307

How to use variable in :old. variable instead of :old.column name.

My requirement is to update the audit_update table with the old value and new value when an update statement gets executed. If i use :old.columnname the purpose is getting resolved.
My requirement is to loop through the columns taken dynamically and update the audit_update_details table. The updation is taking place in a function that called.
The first cursor holds the column name of a given table.
I have to use a statement like :old.variablename . where the variable holds the column name .
Is their an alternative?
CREATE OR REPLACE TRIGGER INSERT_EMP1
AFTER INSERT OR UPDATE OR DELETE
ON EMP FOR EACH ROW
declare
v_seq number(5);
v_result boolean;
v_col_name varchar2(20);
CURSOR FIRSTCURSOR IS
select COLUMN_NAME from user_tab_columns where table_name like 'EMP';
begin
if inserting then
INSERT INTO aud_details VALUES(seq_aud_log_id.nextval,'Emp','I','eno',:NEW.ENO);
end if;
if DELETING then
INSERT INTO aud_details VALUES(seq_aud_log_id.nextval,'Emp','D','eno',:OLD.ENO);
end if;
IF UPDATING THEN
INSERT INTO aud_details VALUES(seq_aud_log_id.nextval,'Emp','U','eno',:OLD.ENO);
select seq_aud_log_id.currval into v_seq from dual;
open FIRSTCURSOR;
LOOP
FETCH FIRSTCURSOR INTO v_col_name;
EXIT WHEN FIRSTCURSOR%NOTFOUND;
BEGIN
-- How to make the code to work successfully.
if (:old.v_col_name != :new.v_col_name) then
v_result := insert_fn('emp',:old.eno, v_col_name , :old.v_col_name, :new.v_col_name, v_seq );
end if;
end;
end loop;
THe below is an example that uses the column name .Instead of column name i need to use the variable. So that the trigger functions for any given table.
/* IF (:old.ename != :new.ename) THEN
v_result := insert_fn('emp',:old.eno, 'ename' , :old.ename, :new.ename, v_seq );
END IF;
IF (:old.dno != :new.dno) THEN
v_result := insert_fn('emp',:old.eno, 'dno' , :old.dno, :new.dno,v_seq );
END IF;
IF (:old.salary != :new.salary) THEN
v_result := insert_fn('emp',:old.eno, 'salary' , :old.salary, :new.salary, v_seq );
END IF;
END IF;
END INSERT_EMP1;
thanks,
vinodh

As Solomon said, it's not possible, but you could write a procedure that would generate the code to do it for each individual column. You could then execute the code generator procedure any time the tables DDL changed in order to update the triggers code.

PL/SQL column names in cursor variable

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