Ansi SQL for "select ... for update nowait"
Hi, All,
I have a sql
select ... for update nowait
My boss wants it to be ANSI compliant.
I am not familiar with ANSI SQL.
What should be the syntax in Ansi?
Thanks a lot!
I resent having the lowest salary :-)Sorry John, it's probably due to the exchange rate of sterling against the canuck dollar right now.
SQL> select empno, ename, sal, job, mgr from emp;
EMPNO ENAME SAL JOB MGR
7369 SPENCER 800 CLERK 7902
7499 VERREYNNE 1600 SALESMAN 7698
7521 VAN WIJK 1250 SALESMAN 7698
7566 MAINGUY 2975 MANAGER 7839
7654 KISHORE 1250 SALESMAN 7698
7698 BARRY 2850 MANAGER 7839
7782 BOEHMER 2695 MANAGER 7839
7788 PADFIELD 3000 ANALYST 7566
7839 SCHNEIDER 5500 PRESIDENT
7844 GASPAROTTO 1500 SALESMAN 7698
7876 CAVE 1100 CLERK 7788
7900 CLARKE 950 CLERK 7698
7902 JAFFAR 3000 ANALYST 7566
7934 ROBERTSON 1430 CLERK 7782
14 rows selected.
SQL> Cheers, APC
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Hello All,
if the requirement is to lock an entire huge table to prevent any users from performing any update statement, which statement has more performance gain and why: LOCK TABLE or select fro update nowait?
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Thanks,The reason I said to revoke update privilege is because I do not understand the requirement. Why do you want to prevent users from updating the table? I am assuming that users should never be allowed to update the table. In that case locking the table and select for update would be no good. If you want to stop users from updating while some one else is updating, why? All the lock table or select for update will do is cause their session to wait (hang) until the locking process commits or rolls back. This could generate a few (sic) complaints that the user application is slow/freezing.
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REFERENCING NEW AS NEW OLD AS OLD
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Hello all,
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HRBCI_ATTRIBUTES_BUFFER_UPDATE
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Here is something from help
FOR ALL ENTRIES WHERE
Syntax
... FOR ALL ENTRIES IN itab WHERE ... col operator itab-comp ...
Effect
If the addition FOR ALL ENTRIES is specified before the language element WHERE, then the components comp of the internal table itab can be used as operands when comparing with relational operators.
The internal table itab must have a structured line type and the component comp must be compatible with the column col.
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Notes
In Release 6.10 and higher, the same internal table can be specified after FOR ALL ENTRIES and after INTO.
The addition FOR ALL ENTRIES is only possible before WHERE conditions of the SELECT statement.
Example
Exporting all flight data for a specified departure city. The relevant airlines and flight numbers are first put in an internal table entry_tab, which is evaluated in the WHERE condition of the subsquent SELECT statement.
PARAMETERS p_city TYPE spfli-cityfrom.
TYPES: BEGIN OF entry_tab_type,
carrid TYPE spfli-carrid,
connid TYPE spfli-connid,
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Hi
How to use ANSI SQL JOINS (9i) for below query
SELECT EMP.EMPNO,EMP_T.TNO,EMP_T.SAL1 FROM EMP,EMP_T WHERE EMP.EMPNO=EMP_T.TNO
UNION ALL
SELECT EMP.EMPNO,EMP_T.TNO,EMP_T.SAL2 FROM EMP,EMP_T WHERE EMP.EMPNO=EMP_T.TNO
UNION ALL
SELECT EMP.EMPNO,EMP_T.TNO,EMP_T.SAL3 FROM EMP,EMP_T WHERE EMP.EMPNO=EMP_T.TNO
EMPNO TNO SAL1
7369 7369 100
7499 7499 1000
7566 7566 400
7782 7782 4000
7369 7369 200
7499 7499 2000
7566 7566 500
7782 7782 5000
7369 7369 300
7499 7499 3000
7566 7566 600
EMPNO TNO SAL1
7782 7782 6000
Regards
MMSELECT EMP.EMPNO,
EMP_T.TNO,
EMP_T.SAL1
FROM EMP
JOIN EMP_T ON ( EMP.EMPNO = EMP_T.TNO )
UNION ALL
SELECT EMP.EMPNO,
EMP_T.TNO,
EMP_T.SAL2
FROM EMP
JOIN EMP_T ON ( EMP.EMPNO = EMP_T.TNO )
UNION ALL
SELECT EMP.EMPNO,
EMP_T.TNO,
EMP_T.SAL3
FROM EMP
JOIN EMP_T ON ( EMP.EMPNO = EMP_T.TNO ) -
Hi All,
A slighly more complex connect by problem (that can be done with ANSI SQL-99) looking for an oracle matching output.
Input Data: (Small example subset)
RootID | Parent_ID | FreeText
0 | 0 |
444 | 555 | ABC1
555 | 666 | DEF2
666 | 777 | GHI3
888 | 0 | JKL4
Output Wanted: (Small example subset)
RootID ParentID FreeText LEVEL (Nesting)
444 | 555 | | 1
444 | 666 | ABC1 | 2
444 | 777 | DEF2-ABC1 | 3
444 | 888 | GHI3-DEF2-ABC1 | 4
444 | 0 | JKL4-GHI3-DEF2-ABC1 | 5
Can be easily enough done with ANSI-99 SYNTAX (Not supported in Oracle using a recursive CTE)
Target platform Oracle 9i
ANSI-SQL 99 Syntax: (Not Supported on Oracle - but demonstrates the ANSI-SQL 99 compliant way of doing this)
;WITH Recurse(RootId, ParentID, FreeText, Level) AS
(SELECT td.RootID, td.ParentID, '' as FreeText, 1 as Level
from TEST_DATA td
where rootid = 444
union all
select Recurse.RootID, td2.ParentId, td2.freetext + '-' + recurse.freetext, recurse.level+1 as level
from TEST_DATA td2
select * from Recurse;
The problem: is to generating the freetext component correctly with oracle.
Can generate the freetext component the wrong way round using SYS_CONNECT_BY_PATH.
select connect_by_root(td.RootID), td.ParentID,
CASE when level = 1 then ''
ELSE
SYS_CONNECT_BY_PATH(td.freetext, '-')
END as FreeText, level
from test_data td
connect by td.RootID = prior td.ParentID
which gives:
RootID ParentID FreeText LEVEL (Nesting)
444 | 555 | | 1
444 | 666 | ABC1 | 2
444 | 777 | ABC1-DEF2 | 3
444 | 888 | ABC1-DEF2-GHI3 | 4
444 | 0 | ABC1-DEF2-GHI3-JKL4 | 5
The problem is the freetext component is the wrong way round (the root node information always comes first).
Tried looking at running something like:
select connect_by_root(td.RootID), td.ParentID,
CASE when level = 1 then ''
ELSE
td.freetext || '-' || FreeText2
END as FreeText2, level
from test_data td
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Is there a sys_connect_by_path_node? (The opposite of sys_connect_by_path)
Returns the path of a column value from node to root,
with column values separated by char for each row returned by CONNECT BY condition
Or another way to get to the output required?
Best Regards,
DNot directly but there is a fairly common workaround using the undocumented REVERSE function.
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production
SQL> SELECT SYS_CONNECT_BY_PATH (ename, '/') enames,
2 REVERSE (SYS_CONNECT_BY_PATH (REVERSE (ename), '/')) reverse_enames
3 FROM emps
4 START WITH mgr IS NULL
5 CONNECT BY PRIOR empno = mgr;
ENAMES REVERSE_ENAMES
/KING KING/
/KING/JONES JONES/KING/
/KING/JONES/SCOTT SCOTT/JONES/KING/
/KING/JONES/SCOTT/ADAMS ADAMS/SCOTT/JONES/KING/
/KING/JONES/FORD FORD/JONES/KING/
/KING/JONES/FORD/SMITH SMITH/FORD/JONES/KING/
/KING/BLAKE BLAKE/KING/
/KING/BLAKE/ALLEN ALLEN/BLAKE/KING/
/KING/BLAKE/WARD WARD/BLAKE/KING/
/KING/BLAKE/MARTIN MARTIN/BLAKE/KING/
/KING/BLAKE/TURNER TURNER/BLAKE/KING/
/KING/BLAKE/JAMES JAMES/BLAKE/KING/
/KING/CLARK CLARK/KING/
/KING/CLARK/MILLER MILLER/CLARK/KING/
14 rows selected.
SQL> -
Should i use SELECT for update NOWAIT ?
Hi:
Do I need to use, in my pl/sql triggers and procedures, the SELECT FOR UPDATE NOWAIT sentence, to avoid locks before using update table sentences ? Is it common to use it on stored procedures and triggers?
Thanks
Joao OliveiraFirst, what, exactly do you mean by "avoid locks"? I was interpreting that to mean "I want to avoid creating locks in my session that might block someone else", not "I want to avoid having my SELECT wait for locks to be released-- I want it to fail immediately". If you meant the latter, then SELECT ... FOR UPDATE NOWAIT would be what you want. If you meant the former, then pessimistic locking is not what you want.
Second, what sort of Oracle Forms architecture do you have? Are you still using old-school client-server applications? Or are you using a three-tiered approach? As Tom discusses in that thread, pessimistic locking is only an option when your client application is able to maintain database state across calls (i.e. client/server systems) not when you have stateless connections (which is the norm in the three-tier model). The old client-server versions of Forms would automatically and transparently do pessimistic locking. Since you didn't mention anything about your architecture, most of us probably assumed the more common stateless client architecture (note how Tom's answers progress over the 5 years in that thread as client/server architecture became less and less common).
Third, while your question is appropriate for either the Database - General forum or the SQL and PL/SQL forum, that generally means that you are free to post it either forum, not that it should be posted in both. The vast majority of the folks that hang out in one forum hang out in the other. It's also rather frustrating to answer a post in one forum only to discover that there is another post in a different forum where someone else had already covered the same points half an hour earlier or to discover that there was additional information in another thread that might have changed your answer.
Fourth, if you are going to do pessimistic locking, that requires that you are able to maintain state across various database calls, that you are locking on the lowest possible level of granularity, and that you are able to time out sessions relatively aggressively to ensure that someone doesn't open a record, thereby locking it, go to lunch (or have their system die) and then block everyone else from working. Assuming that is the case, and that you have some reasonable way to handle the error that gets generated other than simply retrying the operation, adding NOWAIT is certainly an option. Most applications, particularly those getting written today, cannot guarantee all these things, so pessimistic locking is generally not appropriate there.
Looking at your other thread (where there is new information that would be useful in this discussion, one of the reasons that multiple threads are generally a bad idea), it seems that you have an ERP application and you are concerned about the performance of entering orders. Obviously, there shouldn't be any locking issues on the ORDER or ORDER_DETAILS tables, assuming that multiple users aren't going to be inserting the same order at the same time. The contention would almost certainly come when multiple orders are trying to update the STOCK and INVENTORY tables, since multiple orders presumably rely on the same rows in those tables. In that case, I'm not sure what adding a NOWAIT would buy you-- unless you were going to roll back the entire order because someone is updating the STOCK row for #2 pencils and your order has an item of #2 pencils, you'd have to keep retrying the operation until you were able to modify the STOCK row, which would be less efficient than just letting that update block until the row was free.
Now, you could certainly redesign the application to minimize that contention by not trying to update what I assume are aggregate tables like STOCK and INVENTORY directly as part of your OLTP processing or, at least, by minimizing the time that you're locking a row. You could, for example, make STOCK and INVENTORY materialized views rather than tables that refresh ON COMMIT, which should decrease the time that your locks are held. You could also have those tables refreshed asynchronously, which would be even more efficient but may require that you reasses your holdback requirements.
Justin -
Help, question about "select ... for update nowait"
There is a proc code. In the beginning of the code, I used a SQL "select ... for update nowait" in order to prevent from another proc executing at the same time. When the case happens, "-54, ORA-00054: resource busy and acquire with NOWAIT specified" will be printed in the screen.
But there is a question: I need to print sth to indicate "another proc is running". I used "if (sqlca.sqlcode == -54)" as precondition, such as:
if (sqlca.sqlcode == -54) {
printf("There is another proc running.\n");
However, this line will not be printed. I doubt that the code quits directly when using "select ... for update nowait" so as not to set value (-54) to sqlca.sqlcode.
So, could you suggest whether there is another way that I can use to print "There is another proc running" when another proc is running?
Thx a lot for your kindly reply.Yes, that link. Scroll down a bit and you will see:
The calling application gets a PL/SQL exception, which it can process using the error-reporting functions SQLCODE and SQLERRM in an OTHERS handler. Also, it can use the pragma EXCEPTION_INIT to map specific error numbers returned by raise_application_error to exceptions of its own, as the following Pro*C example shows:
EXEC SQL EXECUTE
/* Execute embedded PL/SQL block using host
variables v_emp_id and v_amount, which were
assigned values in the host environment. */
DECLARE
null_salary EXCEPTION;
/* Map error number returned by raise_application_error
to user-defined exception. */
PRAGMA EXCEPTION_INIT(null_salary, -20101);
BEGIN
raise_salary(:v_emp_id, :v_amount);
EXCEPTION
WHEN null_salary THEN
INSERT INTO emp_audit VALUES (:v_emp_id, ...);
END;
END-EXEC;
This technique allows the calling application to handle error conditions in specific exception handlers. -
Hello everyone,
I am working on a jsp/servlet project now, and got questions about which is the better way to deal with concurrent writing issues.
The whole senario is described as following:
First each user is viewing his own list of several records, and each record has a hyperlink through which user can modify it. After user clicks that link, there will be a popup window pre-populated with the values of that record, then user can do the modifications. After he is done, he can either click "Save " to save the change or "Cancel" to cancel it.
Method1---This is the method I am using right now.
I did not do any special synchronization measures, so if user 1 and user2 click the link of same record, they will modify the record
at the same time, then whose updates will take effect depends on who submits the request later. If user1 submitted first, then user 2, user1
will not see his updates. I know with this method, we will have the problem of "Lost Updates", but this is the simplest and efficient way to handle this issue.
Method2--This is the method I am hesitating.
I am considering to use "Select....for update nowait " to lock a record when user1 has selected one record and intended to modify it. If user2 wanted to modify the same record, he is not allowed. ( by catching the sql exception.)But the issue I am concerned about is because the "select .. For update" action and "Update action" are not so consecutive as many transaction examples described. There could be a
big interval between " select " and "update" actions. You could not predict user's behavior, maybe after he open the popup window, it took him a while to make up his decision, or even worse, he was interrupted by other things and went away for the whole morning?.Then the lock is just held until he releases it.
And another issue is if he clicks "cancel" to cancel his work, if I use method1, I don't need to interact with server-side at all, but if user method2, I still need to interact with the server to release the lock.
Can someone give me some advice ? What do you do to deal with similar situation? If I did not make clear of the question, please let me know.
Thanks in advance !
RachelHi Rachel,
Congratulation, you have found a way to overcome your programming business logic.
Have you ever consider that the solution of using CachedRowset concept yet to be included in j2se 1.5 tiger next year too prove workable under the scenario , whereby you can disconnect from the database after you have execute your query and reconnect again if you have to do transactional activity later, so that the loading overhead as well as the data pooling activity could be well balanced off.
Although rowset is still not an official API now, but its potential to me is worth consideration.
I have written a simple but crude cut JSP programme posted on this forum under the heading "Interesting CachedRowset JSP code to share " to demonstrate the concept of CachedRowset and hoping that the Java guru or the developer could provide feedback on how to imporve on the programming logic or methodology.
Thanks!! -
Java.sql.SQLSyntaxErrorException: ORA-02014: cannot select FOR UPDATE from
Experts,
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at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3752)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3806)
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at oracle.jbo.server.EntityImpl.setAttributeInternal(EntityImpl.java:1971)
at oracle.jbo.server.AttributeDefImpl.resolveSet(AttributeDefImpl.java:3412)
at oracle.jbo.server.EntityImpl.setAttrInvokeAccessor(EntityImpl.java:1952)
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at oracle.jbo.server.ViewRowStorage.setAttributeValue(ViewRowStorage.java:2327)
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at com.awRostamani.leadWeb.model.uiView.PartyVORowImpl.setAttrInvokeAccessor(PartyVORowImpl.java:4204)
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at oracle.jbo.uicli.binding.JUCtrlListBinding.setTargetAttrsFromLovRow(JUCtrlListBinding.java:2778)
at oracle.jbo.uicli.binding.JUCtrlListBinding.updateTargetFromSelectedValue(JUCtrlListBinding.java:2906)
at oracle.jbo.uicli.binding.JUCtrlListBinding.setAttributeFromValueList(JUCtrlListBinding.java:2851)
at oracle.jbo.uicli.binding.JUCtrlListBinding.setSelectedIndex(JUCtrlListBinding.java:1745)
at oracle.jbo.uicli.binding.JUCtrlListBinding.setInputValueInRow(JUCtrlListBinding.java:3499)
at oracle.jbo.uicli.binding.JUCtrlValueBinding.setInputValue(JUCtrlValueBinding.java:2804)
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at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnNamingContainerComponent(UIXComponentBase.java:1380)
at oracle.adf.view.rich.component.fragment.UIXRegion.invokeOnComponent(UIXRegion.java:555)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.invokeOnComponent(ContextSwitchingComponent.java:194)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at oracle.adf.view.rich.component.fragment.UIXInclude.invokeOnComponent(UIXInclude.java:147)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnChildrenComponents(UIXComponentBase.java:1330)
at org.apache.myfaces.trinidad.component.UIXComponentBase.invokeOnComponent(UIXComponentBase.java:1424)
at oracle.adf.view.rich.component.rich.RichDocument.invokeOnComponent(RichDocument.java:168)
at javax.faces.component.UIComponent.invokeOnComponent(UIComponent.java:720)
at javax.faces.component.UIComponentBase.invokeOnComponent(UIComponentBase.java:678)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:334)
at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:186)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:106)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:446)
at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:446)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:271)
at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:177)
at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at com.awRostamani.leadWeb.ui.filter.SecurityCheckFilter.doFilter(SecurityCheckFilter.java:80)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:175)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:111)
at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)
at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)
at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)
at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)
at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:136)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
thnksWhen trying to commit from business tester, then also the following error is coming
Jdev 11.1.1.5 - locking mode is optimistic.
OracleSQLBuilderImpl.doEntitySelect failed...
java.sql.SQLSyntaxErrorException: ORA-02014: cannot select FOR UPDATE from view with DISTINCT, GROUP BY, etc.
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:457)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:405)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:889)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:476)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:204)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:540)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:217)
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:924)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1261)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1419)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3752)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3806)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1667)
at oracle.jbo.server.OracleSQLBuilderImpl.doEntitySelectForAltKey(OracleSQLBuilderImpl.java:869)
at oracle.jbo.server.BaseSQLBuilderImpl.doEntitySelect(BaseSQLBuilderImpl.java:553)
at oracle.jbo.server.EntityImpl.doSelect(EntityImpl.java:8259)
at oracle.jbo.server.EntityImpl.lock(EntityImpl.java:5964)
at oracle.jbo.server.EntityImpl.beforePost(EntityImpl.java:6484)
at oracle.jbo.server.EntityImpl.postChanges(EntityImpl.java:6665)
at oracle.jbo.server.DBTransactionImpl.doPostTransactionListeners(DBTransactionImpl.java:3286)
at oracle.jbo.server.DBTransactionImpl.postChanges(DBTransactionImpl.java:3089)
at oracle.jbo.server.DBTransactionImpl.commitInternal(DBTransactionImpl.java:2093)
at oracle.jbo.server.DBTransactionImpl.commit(DBTransactionImpl.java:2374)
at oracle.adf.model.bc4j.DCJboDataControl.commitTransaction(DCJboDataControl.java:1608)
at oracle.adf.model.binding.DCDataControl.callCommitTransaction(DCDataControl.java:1416)
at oracle.jbo.uicli.binding.JUCtrlActionBinding.doIt(JUCtrlActionBinding.java:1437)
at oracle.adf.model.binding.DCDataControl.invokeOperation(DCDataControl.java:2149)
at oracle.jbo.uicli.binding.JUCtrlActionBinding.invoke(JUCtrlActionBinding.java:740)
at oracle.jbo.uicli.jui.JUActionBinding.actionPerformed(JUActionBinding.java:193)
at oracle.jbo.uicli.controls.JUNavigationBar.doAction(JUNavigationBar.java:412)
at oracle.jbo.jbotester.NavigationBar.doAction(NavigationBar.java:111)
at oracle.jbo.uicli.controls.JUNavigationBar$NavButton.actionPerformed(JUNavigationBar.java:118)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
at java.awt.Component.processMouseEvent(Component.java:6289)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6054)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4652)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4482)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4482)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:603)
at java.awt.EventQueue$1.run(EventQueue.java:601)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:617)
at java.awt.EventQueue$2.run(EventQueue.java:615)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:614)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
[348] JUErrorHandlerDlg.reportException(oracle.jbo.DMLException)
[349] DBG: afterActionPerformed :javax_swing_JToolBara1_175
Edited by: in the line of fire on Jul 12, 2011 2:54 PM -
Hi everyone!
I have procedure that looks like this:
procedure set_expired_users(
p_QID integer,
p_Value integer default 1)
is
l_mdate timestamp(3) := null;
begin
l_mdate := get_mdate(p_Value);
MERGE INTO cached_lists cl
USING (SELECT distinct s.rootof as list_id, p_Value as is_expired, l_mdate as mdate
FROM zzz_userrelflat f, zzz_users u, zzz_temp_nn z, speclists s, lists_table lt
WHERE u.grp <> 1
AND f.userm = u.id
AND lt.id = z.id
AND f.userg = lt.ra
AND z.qid = p_QID
AND userm <> -2
AND s.ruser = userm) t
ON (cl.list_id = t.list_id)
when matched then
UPDATE SET cl.is_expired = t.is_expired, cl.mdate = decode(t.mdate, null, cl.mdate, t.mdate)
when not matched then
INSERT VALUES (t.list_id, t.is_expired, l_mdate);
end set_expired_users;As you can see there is no commit, commit executes in other stored procedures after that. in some cases I have bottleneck(enq TX), I rewrote procedure:
procedure set_expired_users(
p_QID integer,
p_Value integer default 1)
is
l_mdate timestamp(3) := null;
busy_lock exception;
PRAGMA exception_init(busy_lock,-54);
cursor cur_upd is
SELECT 1 from cached_lists cl where cl.list_id in (SELECT distinct s.rootof as list_id
FROM zzz_userrelflat f, zzz_users u, zzz_temp_nn z, speclists s, lists_table lt
WHERE u.grp <> 1
AND f.userm = u.id
AND lt.id = z.id
AND f.userg = lt.ra
AND z.qid = p_QID
AND userm <> -2
AND s.ruser = userm) FOR UPDATE NOWAIT;
begin
open cur_upd;
l_mdate := get_mdate(p_Value);
MERGE INTO cached_lists cl
USING (SELECT distinct s.rootof as list_id, p_Value as is_expired, l_mdate as mdate
FROM zzz_userrelflat f, zzz_users u, zzz_temp_nn z, speclists s, lists_table lt
WHERE u.grp <> 1
AND f.userm = u.id
AND lt.id = z.id
AND f.userg = lt.ra
AND z.qid = p_QID
AND userm <> -2
AND s.ruser = userm) t
ON (cl.list_id = t.list_id)
when matched then
UPDATE SET cl.is_expired = t.is_expired, cl.mdate = decode(t.mdate, null, cl.mdate, t.mdate)
when not matched then
INSERT VALUES (t.list_id, t.is_expired, l_mdate);
close cur_upd;
exception
when busy_lock then
null;
end set_expired_users;Is this a good method to exclude enq TX?
Sincerely,
Pavel.In my opinion, you shouldn't rewrite that procedure, but you should rethink (ie. streamline) the overall transaction and try to reduce the wait times between the procedure call and the commit/rollback.
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