Default form value using sql with bind variable

I wish to create a form based upon a table with a foreign key. I wish to add a field to the form that is an uneditable text field with a default value using sql of 'select name from other_table where other_table_id = ?' where ? is a bind variable defined by a hidden field which is the value of the foreign key identified at runtime. How can this be done?
null

I don't think that will work. I have multiple people accessing the Portal at the same time with the same login (or lack of as public will be the most common user). I could set it easily enough as the value is passed to the form by a link object, so I could add it to the before page plsql block and set the value. But I am uncertain how it will behave in a multi-user mutlitasking environment.
Maybe I should describe what I am looking to accomplish. I want to create a display above a form that will list static details from other tables (i.e. when editing a user's phone number, which is in one table, you want the user to see the person's name, which is in another table, and the form is based upon the phone table) ...
Just as I am thinking about it, I thought of an idea. I could put some specific code in the before displaying page plsql section to query the database and use htp to output the information for data not in the table the form is based upon. I will try this and see how it works. It would have been nice to have just created a field that is not editable and had a default value, but this should work as well.
Let me know if you see any problem with this or if you have any better suggestions.
Thanks for the fast response.

Similar Messages

How to reduce different versions of SQL with bind variables

There is an application, developed on Java.
Application executes SQL following types:
select * from t where id in (:1)
select * from t where id in (:1, :2)
select * from t where id in (:1, :2, :3)
select * from t where id in (:1, :2, :3, :4)
...And as a result very many versions (thousands) of similar SQL.
Do you know a method to reduce number of such SQLs?
I see one method: use one form of SQL with large number of prepared bid variables.
Like as
select * from t where id in (:1, :2, :3, :4, :5, :6, :7, :8, ...);And if query will be executed with one variable, the others will be equal to null.
Is there another method?

Cannot you insert those values into a temporary table and work within a subquery against that table ? That will make the code more secure, especially if the number of values is high.
Nicolas.

Slow performance when using cursor with bind variable

i'm facing the problem mentioned in the subject.
whenever i use the bind variable it would take more than 5mins to fetch 157 records, but if i hardcode the value ( not using variable ) it would take only 10sec to fetch 157 records.
can anyone give me some guide to solve this problem? thank you..
Code :
DECLARE
cursor cur1(l_startdate IN varchar2,l_enddate IN varchar2) IS
select * from shipment ship where ship.insertion_date >= to_date(l_startdate,'DD-MM-YYYY HH24:MI:SS') and ship.insertion_date < to_date(l_enddate ,'DD-MM-YYYY HH24:MI:SS')
TYPE shipment_aat IS TABLE OF cur1%ROWTYPE INDEX BY PLS_INTEGER;
l_shpt shipment_aat;
limit_in INTEGER := 100;
BEGIN
v_startdate := '10-06-2008 14:00:00';
v_enddate := '10-06-2008 17:00:00';
OPEN C_shpt(v_startdate,v_enddate);
LOOP --start shipment loop
FETCH C_shpt BULK COLLECT INTO l_shpt LIMIT limit_in;
FOR indx IN 1 .. l_shpt.COUNT
LOOP
DBMS_OUTPUT.PUT_LINE('l_shpt value ' || l_shpt(indx).ship_number || '/' || l_shpt(indx).insertion_date);
END LOOP;
EXIT WHEN l_shpt.COUNT < limit_in;
END LOOP; -- end of shipment loop
CLOSE cur1;
END;

When your query takes too long ...

Forms: sql with bind variable as default value to form field?

I am using a form as a way to show details of already entered rows in a table. A report passes an id parameter to the form to get it to show the right data. No insert or update is possible. (I am using a form rather than a report because I need to display BLOBs, something reports can't do.)
I need to execute sql statements based on the passed id to fill certain fields in the form with data from other tables. For example: The table the form is based on includes a category_id, whereas I want to display the category name which resides in another table.
How would I best achieve this?

Hi,
You do this in the additional plsql code section of the form by getting the value of the category_id from the session variables and then getting its name from the cateogory table and assigning it to the category name column.
Sample Code
declare
catid number;
catnm varchar2(30);
blk varchar2(10) := 'DEFAULT';
begin
catid := p_session.get_value_as_varchar2(
p_block_name => blk,
p_attribute_name => 'A_CATEGORY_ID');
select category_name
into catnm
from cat_table
where category_id = cat_id;
p_session.set_value(
p_block_name => blk,
p_attribute_name => 'A_CATEGORY_NAME',
p_value => catnm
end;
Thanks,
Sharmila

Why CBO don't use function-base index when I use like and bind variable

Hello
I have litle problem with function-base index and like with bind variable.
When I use like with bind variable, the CBO don't use my function-base index.
For example when I create table and index:
ALTER SESSION SET NLS_SORT='BINARY_CI';
ALTER SESSION SET NLS_COMP='LINGUISTIC';
alter session set nls_language='ENGLISH';
-- DROP TABLE TEST1;
CREATE TABLE TEST1 (K1 VARCHAR2(32));
create index test1_idx on test1(nlssort(K1,'nls_sort=BINARY_CI'));
INSERT INTO TEST1
SELECT OBJECT_NAME FROM ALL_OBJECTS;
COMMIT;
When I run:
ALTER SESSION SET NLS_SORT='BINARY_CI';
ALTER SESSION SET NLS_COMP='LINGUISTIC';
SELECT * FROM TEST1 WHERE K1 = 'abcd';
or
SELECT * FROM TEST1 WHERE K1 LIKE 'abcd%';
CBO use index.
PLAN_TABLE_OUTPUT
SQL_ID 4vrmp7cshbvqy, child number 1
SELECT * FROM TEST1 WHERE K1 LIKE 'abcd%'
Plan hash value: 1885706448
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | | | 1 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| TEST1 | 2 | 98 | 1 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | TEST1_IDX | 2 | | 1 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - access("TEST1"."SYS_NC00002$">=HEXTORAW('6162636400') AND
"TEST1"."SYS_NC00002$"<HEXTORAW('6162636500') )
but when I run
SELECT * FROM TEST1 WHERE K1 LIKE :1;
CBO don't use index
PLAN_TABLE_OUTPUT
SQL_ID 9t461s1669gru, child number 0
SELECT * FROM TEST1 WHERE K1 LIKE :1
Plan hash value: 4122059633
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | | | 89 (100)| |
|* 1 | TABLE ACCESS FULL| TEST1 | 2 | 48 | 89 (3)| 00:00:02 |
Predicate Information (identified by operation id):
1 - filter("K1" LIKE :1)
What should I change to force CBO to use index.
I don't wont use index hint in query.
My oracle version:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for 64-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

OK. But why if I create normal index (create index test1_idx on test1(K1)) and return to default nls settings this same query use index.
PLAN_TABLE_OUTPUT
SQL_ID 9t461s1669gru, child number 0
SELECT * FROM TEST1 WHERE K1 LIKE :1
Plan hash value: 598212486
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | | | 1 (100)| |
|* 1 | INDEX RANGE SCAN| TEST1_IDX | 1 | 18 | 1 (0)| 00:00:01 |
Predicate Information (identified by operation id):
1 - access("K1" LIKE :1)
filter("K1" LIKE :1)
Note
- dynamic sampling used for this statement (level=2)
when index is function-base (create index test1_idx on test1(nlssort(K1,'nls_sort=BINARY_CI')))
PLAN_TABLE_OUTPUT
SQL_ID 9t461s1669gru, child number 1
SELECT * FROM TEST1 WHERE K1 LIKE :1
Plan hash value: 4122059633
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | | | 89 (100)| |
|* 1 | TABLE ACCESS FULL| TEST1 | 3 | 54 | 89 (3)| 00:00:02 |
Predicate Information (identified by operation id):
1 - filter("K1" LIKE :1)
Note
- dynamic sampling used for this statement (level=2)
when I create index with upper function "index test1_idx on test1(upper(K1))" the query use index
SELECT * FROM TEST1 WHERE upper(K1) LIKE :1
Plan hash value: 1885706448
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | | | 1 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| TEST1 | 4481 | 157K| 1 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | TEST1_IDX | 806 | | 1 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - access("TEST1"."SYS_NC00002$" LIKE :1)
filter("TEST1"."SYS_NC00002$" LIKE :1)
Note
- dynamic sampling used for this statement (level=2)

Problem with Bind Variable in 11.2

Hi
I have a slow statement with bind Variables. With literals it works fine. Is there a way to replace the bind by literal in advanced ? I use Release 11.2.0.2.3
Thank you

904062 wrote:
I have a slow statement with bind Variables. With literals it works fine. Is there a way to replace the bind by literal in advanced ? I use Release 11.2.0.2.3This specific scenario is very much an exception to the rule - and you need to back your statement up with execution plans of the SQL with bind variables and with literals, and run stats that show the difference between these two execution plans.
See the {message:id=9360003} from the {forum:id=75} forum's FAQ for details on how to post a SQL performance tuning question.

BC4J bug with "bind variables" JBO-27122 ORA-01008

I think we are found a BUG using BC4J with bind variables in a view object.
If the bind variable appear in the WHERE condition two or more times at
the beginning of the query the above error occur.
oracle.jbo.SQLStmtException: JBO-27122: SQL error during statement preparation. Statement:
SELECT Emp.EMPNO,Emp.ENAME,Emp.JOB,Emp.MGR,Emp.HIREDATE,Emp.SAL,Emp.COMM, Emp.DEPTNO
FROM SCOTT.EMP Emp
WHERE :1 <=10000 and :1 <= sal and :2=20
java.sql.SQLException: ORA-01008: not all variables bound
Otherwise if bind variable apper two or more times, but not together
like this sample:
WHERE :1 <=10000 and :2=20 and :1 <= sal
the error not occur.
We prove this with:
JDeveloper 9.0.5.2 (build 1618)Business Components Version 9.0.5.16.0
JDeveloper 9.0.5.0 (build 1375)Business Components Version 9.0.5.13.52
I looking for a patch! or acceptable workaround.
Tx for your help!
diego.
/* the cliente app */
ApplicationModule am = Configuration.createRootApplicationModule("business_tier.AppModule","AppModuleLocal");
ViewObject vo = am.findViewObject("EmpView");
vo.setWhereClauseParam(0,"100");
vo.setWhereClauseParam(1,"20");
Row emp = vo.first();

This is a known bug (1326006). The workaround is to use:
vo.setWhereClauseParam(0,"100");
vo.setWhereClauseParam(1,"20");
vo.setWhereClauseParam(2,"20");
Hope this helps,
Lynn
Java Tools Team

ODT Query Window. Query with binding variable?

I have the ODT 11.1.0.7.20 installed.
In "Query Window", I execute an SQL with binding variables. But I only get ORA-01008 errors. How do I do that?
I want to double click an SQL and load it in "Query Window". How do I do that?
I want to right click an SQL and select "Open with Query Window". How do I do that?
In Query Window I want to load an SQL either by drag and drop or by select a function "Open SQL". How do I do that?
Why none of these functionalities work as you could expect?
Thanks,
Tobias

Finally i found the problem..
The problem was that i had to remove one line from the properties of my table departments, the property: selectedrowkeys, because it only passed the last selected row.
Still, i apreciate the help and i had to replace some code in the bean.java , because of the exception error and you didn't had to do that. Maybe i did some configuration in the wrong way and it went wrong.
Thanks for the help.
Regards,
Frederico.

SQL query with Bind variable with slower execution plan

I have a 'normal' sql select-insert statement (not using bind variable) and it yields the following execution plan:-
Execution Plan
0 INSERT STATEMENT Optimizer=CHOOSE (Cost=7 Card=1 Bytes=148)
1 0 HASH JOIN (Cost=7 Card=1 Bytes=148)
2 1 TABLE ACCESS (BY INDEX ROWID) OF 'TABLEA' (Cost=4 Card=1 Bytes=100)
3 2 INDEX (RANGE SCAN) OF 'TABLEA_IDX_2' (NON-UNIQUE) (Cost=3 Card=1)
4 1 INDEX (FAST FULL SCAN) OF 'TABLEB_IDX_003' (NON-UNIQUE)
(Cost=2 Card=135 Bytes=6480)
Statistics
0 recursive calls
18 db block gets
15558 consistent gets
47 physical reads
9896 redo size
423 bytes sent via SQL*Net to client
1095 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
55 rows processed
I have the same query but instead running using bind variable (I test it with both oracle form and SQL*plus), it takes considerably longer with a different execution plan:-
Execution Plan
0 INSERT STATEMENT Optimizer=CHOOSE (Cost=407 Card=1 Bytes=148)
1 0 TABLE ACCESS (BY INDEX ROWID) OF 'TABLEA' (Cost=3 Card=1 Bytes=100)
2 1 NESTED LOOPS (Cost=407 Card=1 Bytes=148)
3 2 INDEX (FAST FULL SCAN) OF TABLEB_IDX_003' (NON-UNIQUE) (Cost=2 Card=135 Bytes=6480)
4 2 INDEX (RANGE SCAN) OF 'TABLEA_IDX_2' (NON-UNIQUE) (Cost=2 Card=1)
Statistics
0 recursive calls
12 db block gets
3003199 consistent gets
54 physical reads
9448 redo size
423 bytes sent via SQL*Net to client
1258 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
55 rows processed
TABLEA has around 3million record while TABLEB has 300 records. Is there anyway I can improve the speed of the sql query with bind variable? I have DBA Access to the database
Regards
Ivan

Many thanks for your reply.
I have run the statistic already for the both tableA and tableB as well all the indexes associated with both table (using dbms_stats, I am on 9i db ) but not the indexed columns.
for table I use:-
begin
dbms_stats.gather_table_stats(ownname=> 'IVAN', tabname=> 'TABLEA', partname=> NULL);
end;
for index I use:-
begin
dbms_stats.gather_index_stats(ownname=> 'IVAN', indname=> 'TABLEB_IDX_003', partname=> NULL);
end;
Is it possible to show me a sample of how to collect statisc for INDEX columns stats?
regards
Ivan

VO with bind variable defined in SQL is not updated correctly

Hi Experts,
I have one simple question here, could you please help answer? Thanks a lot!
I have 2 pages, the first page displays an employee table, the second page shows some details related to the selected employee. When select one employee and click on the detail button I can be naviaged to the second page and see the details for the selected employee. The vo used on the second page uses a bind variable called "empId" which is binding to a pageFlowScope value 'adf.context.pageFlowScope.empId', and this pageFlowScope value will be populated to the selected empId in detail button actionListener at runtime).
The question here is, now the first navigating is ok, the detail page can show the correct information for the employee selected on the employee page, but when navigating back and choosing another employee, and then click on the detail button again, the detail page is NOT updated, it still shows the first selected employee information. I do debug the actionListener in the backing bean and the second selected empId does get passed to pageFlowScope.empId, the bind variable in the VO should get the new value, right? but why the second page does not get updated (query using the new bind variable value)?
Thanks!
Edited by: user774592 on Jul 20, 2011 11:13 PM
Edited by: user774592 on Jul 20, 2011 11:15 PM
Edited by: user774592 on Jul 20, 2011 11:15 PM

Hi Timo,
Thanks for you response! The JDev version I used is 11.1.2.0.0. Actually, they are different VOs, the 1st page is EmployeeVO, the second page is ResourceSummaryVO which binds the empId variable in SQL. The ActionListener code is as below.
public void viewResSummary(ActionEvent actionEvent) {
// Add event code here...
DCBindingContainer bc = (DCBindingContainer)this.getBindings();
DCIteratorBinding empIteBinding =
bc.findIteratorBinding("SEmployeeView1Iterator");
//Get employee id from the current selected employee record
Row currentRow = empIteBinding.getRowSetIterator().getCurrentRow();
Long employeeId = ((DBSequence)currentRow.getAttribute("EmployeeId")).getValue();
//Set employeeId as a pageFlowScope object which will be used in ResourceSummaryPage
AdfFacesContext.getCurrentInstance().getPageFlowScope().put("empId", employeeId);
empId is defined using Bind Variable Dialog and is referenced in ResourceSummaryVO on the second page. I used the EL expression to defined its value to adf.context.pageFlowScope.empId which will be populated using above code at runtime.
Again, thanks for your help!

Query with bind variable, how can use it in managed bean ?

Hi
I create query with bind variable (BindControlTextValue), this query return description of value that i set in BindControlTextValue variable, how can i use this query in managed bean? I need to set this value in String parameter in managed bean.
Thanks

Put the query in a VO and execute it the usual way.
If you need to, you can write a parameterized method in VOImpl that executes the VO query with the parameter and then call that method from the UI (as a methodAction binding) either through the managed bean or via a direct button click on the page.

How to use ApplicationModuleImpl.createViewObject for VO with bind variable

I need to implement a AM method to create VO instance from a generic VODef with bind variables.
The createViewObject() will trigger the executeQuery of the VO before I can set up the bind variables for the query.
What is the proper way to create view object instance with bind variables?

I am using JDeveloper 11.1.1.2.
I have a ViewObjectA declared with some bind variables which determine what business data to be retrieved at runtime via a service method of the ApplicationModule.
As the ViewObjectA is only referenced internally within ApplicationModule and I need more than one instance of the ViewObjectA for different conditions at runtime,
I use ApplicationModuleImpl.createViewObject() to create an instance of ViewObjectA instead of adding ViewObjectA to the data model of the ApplicationModule.
Currently, when the ViewObjectA is instantiated, it also trigger an executeQuery() which will not retrieve correct data until I set up the bind variables.
However, the createViewObject() method doesn't let me pass in the values of the binding variables.
Currenlty, I just call the createViewObject() and then set the binding variables values and call executeQuery() again.
Just checking if there is a better way to do so...

All sqls executed by an user with a timeframe with bind variables.

10.2.0.4 Version.
Is there a way to get list of all the sqls executed by an user between time t1 and t2 with bind variables along with the stats from v$sql.
I am able to get binds from v$sql_bind_capture for an user but not able to restrict to the time frame I want.
Thanks for help in advance.

Enable 10046 trace (level=12) for the sessions in question.
Make sure you have enough free space available as this could result in a huge file depending on session's activity.
Asif Momen
http://momendba.blogspot.com

Create collection from query with bind variable

Apex 4.0.2
Per Joel Re: Collection with bind variable the apex_collection.create_collection_from_query_b supports queries containing bind variable references (:P1_X) but I am not sure how to use this feature, the documentation doesn't have an example, just the API signature for the overloaded version has changed.
If the query contains 2 bind variable references to session state (:P1_X and :P1_Y), can someone please show an example of what to pass in for the p_names and p_values parameters to the API?
Thanks
procedure create_collection_from_query_b(
    -- Create a named collection from the supplied query using bulk operations. The query will
    -- be parsed as the application owner. If a collection exists with the same name for the current
    -- user in the same session for the current Flow ID, an application error will be raised.
    -- This procedure uses bulk dynamic SQL to perform the fetch and insert operations into the named
    -- collection. Two limitations are imposed by this procedure:
    --   1) The MD5 checksum for the member data will not be computed
    --   2) No column value in query p_query can exceed 2,000 bytes
    -- Arguments:
    --     p_collection_name   = Name of collection. Maximum length can be
    --                            255 bytes. Note that collection_names are case-insensitive,
    --                            as the collection name will be converted to upper case
    --     p_query             = Query to be executed which will populate the members of the
    --                            collection. If p_query is numeric, it is assumed to be
    --                            a DBMS_SQL cursor.
    -- example(s):
    --     l_query := 'select make, model, caliber from firearms';
    --     apex_collection.create_collection_from_query_b( p_collection_name => 'Firearm', p_query => l_query );
    p_collection_name in varchar2,
    p_query           in varchar2,
    p_names           in wwv_flow_global.vc_arr2,
    p_values          in wwv_flow_global.vc_arr2,
    p_max_row_count   in number default null)
    ;

VANJ wrote:
Apex 4.0.2
Per Joel Re: Collection with bind variable the apex_collection.create_collection_from_query_b supports queries containing bind variable references (:P1_X) but I am not sure how to use this feature, the documentation doesn't have an example, just the API signature for the overloaded version has changed.
If the query contains 2 bind variable references to session state (:P1_X and :P1_Y), can someone please show an example of what to pass in for the p_names and p_values parameters to the API?Not tried it, but guessing something like
apex_collection.create_collection_from_query_b(
    p_collection_name => 'foobar'
, p_query => 'select f.foo_id, b.bar_id, b.baz from foo f, bar b where f.foo_id = b.foo_id and f.x = to_number(:p1_x) and b.y = :p1_y'
, p_names => apex_util.string_to_table('p1_x:p1_y')
, p_values => apex_util.string_to_table(v('p1_x') || ':' || v('p1_y')))

Report Performance with Bind Variable

Getting some very odd behaviour with a report in APEX v 3.2.1.00.10
I have a complex query that takes 5 seconds to return via TOAD, but takes from 5 to 10 minutes in an APEX report.
I've narrowed it down to one particular bind. If I hard code the date in it returns in 6 seconds, but if I let the date be passed in from a parameter it takes 5+ minutes again.
Relevant part of the query (an inline view) is:
,(select rglr_lect lect
,sum(tpm) mtr_tpm
,sum(enrols) mtr_enrols
from ops_dash_meetings_report
where meet_ev_date between to_date(:P35_END_DATE,'DD/MM/YYYY') - 363 and to_date(:P35_END_DATE,'DD/MM/YYYY')
group by rglr_lect) RPV
I've tried replacing the "to_date(:P35_END_DATE,'DD/MM/YYYY') - 363" with another item which is populated with the date required (and verified by checking session state). If I replace the :P35_END_DATE with an actual date the performance is fine again.
The weird thing is that a trace file shows me exactly the same Explain Plan as the TOAD Explain where it runs in 5 seconds.
Another odd thing is that another page in my application has the same inline view and doesn't hit the performance problem.
The trace file did show some control characters (circumflex M) after each line of this report's query where these weren't anywhere else on the trace queries. I wondered if there was some sort of corruption in the source?
No problems due to pagination as the result set is only 31 records and all being displayed.
Really stumped here. Any advice or pointers would be most welcome.
Jon.

Don't worry about the Time column, the cost and cardinality are more important to see whther the CBO is making different decisions for whatever reason.
Remember that the explain plan shows the expected execution plan and a trace shows the actual execution plan. So what you want to do is compare the query with bind variables from an APEX page trace to a trace from TOAD (or sqlplus or whatever). You can do this outside APEX like this...
ALTER SESSION SET EVENTS '10046 trace name context forever, level 1';Enter and run your SQL statement...;
ALTER SESSION SET sql_trace=FALSE;This will create a a trace file in the directory returned by...
SELECT value FROM v$parameter WHERE name = 'user_dump_dest' Which you can use tkprof to format.
I am assuming that your not going over DB links or anything else slightly unusual?
Cheers
Ben

Default form value using sql with bind variable

Similar Messages

Maybe you are looking for