ORA-04091: table is mutating, trigger/function

I am using oracle 11g R2 - 11.2.0.1
I have following function to fetch the ID from name supplied
create or replace
FUNCTION get_group_id
(p_groupname IN group_list.groupname%TYPE)
RETURN group_list.group_id%TYPE
AS
v_group_id group_list.group_id%TYPE;
BEGIN
SELECT group_list.group_id
INTO v_group_id
FROM group_list
WHERE group_list.groupname = p_groupname;
RETURN v_group_id;
END get_group_id;
and I am doing simple update command to the table, but its giving me ORA-04091 error. Any help is appreciated
update GROUP_LIST set MGR_GROUP_ID = get_group_id('manager1') where group_id = get_group_id('employee51');
Error which I am getting is -
Error report:
SQL Error: ORA-04091: table is mutating, trigger/function may not see it
ORA-06512: at "GET_GROUP_ID", line 7
04091. 00000 - "table %s.%s is mutating, trigger/function may not see it"
*Cause: A trigger (or a user defined plsql function that is referenced in
this statement) attempted to look at (or modify) a table that was
in the middle of being modified by the statement which fired it.
*Action: Rewrite the trigger (or function) so it does not read that table.

>
and I am doing simple update command to the table, but its giving me ORA-04091 error. Any help is appreciated
update GROUP_LIST set MGR_GROUP_ID = get_group_id('manager1') where group_id = get_group_id('employee51');
Error which I am getting is -
Error report:
SQL Error: ORA-04091: table is mutating, trigger/function may not see it
>
And do you have a trigger on the GROUP_LIST table that calls you function that queries the GROUP_LIST table?
The solution is simple: DON'T DO THAT!
See Trigger Restrictions on Mutating Tables in the SQL Language doc
http://docs.oracle.com/cd/B28359_01/appdev.111/b28370/triggers.htm#g1699708
Trigger Restrictions on Mutating Tables
A mutating table is a table that is being modified by an UPDATE, DELETE, or INSERT statement, or a table that might be updated by the effects of a DELETE CASCADE constraint.
The session that issued the triggering statement cannot query or modify a mutating table. This restriction prevents a trigger from seeing an inconsistent set of data.
This restriction applies to all triggers that use the FOR EACH ROW clause. Views being modified in INSTEAD OF triggers are not considered mutating.
When a trigger encounters a mutating table, a run-time error occurs, the effects of the trigger body and triggering statement are rolled back, and control is returned to the user or application. (You can use compound triggers to avoid the mutating-table error. For more information, see Using Compound Triggers to Avoid Mutating-Table Error.)
Consider the following trigger:
CREATE OR REPLACE TRIGGER Emp_count
. . .

Similar Messages

ORA-04091: table is mutating, trigger/function may not see

Hello All,
I am not an expert in oracle and I have been facing a problem where I get a message as follows :
ORA-04091: table <table> is mutating, trigger/function may not see it
I have a table tab1 which has ID, name, and some other columns. the rows in this table form a parent-child type relationship based on some columns within that table. I have created another table called relationship table. The relationship table has 2 columns ID and parentID. I keep this table up to date using triggers. For example if a new record is inserted or upadted in tab1 which affects the parent - child relationship, i update the relationship table accordingly using an insert / update trigger and it works fine.
I created another trigger as follows
create or replace trigger MY_DELETE_TRIGGER
after delete on tab1
for each row
BEGIN
update relationships a set a.parentID = null where a.parentID = :OLD.ID;
delete from relationships a where a.id = :OLD.ID;
END MY_DELETE_TRIGGER;
Basically what I am doing is, the record once deleted, if it was parent of anybody else, i am setting the parent as null and the record itself, if it was in the relationships as a child, I am removing that row.
This is when I get the table is mutating error, and I don't know how to fix it.
Can anybody please help me,
Thanks in advance

Could you provide more details?
SQL> select * from tab1;
        ID NAME
         1 test1
         2 test2
SQL> select * from relationships;
        ID   PARENTID
         1          1
         2          1
SQL> create or replace trigger MY_DELETE_TRIGGER
2 after delete on tab1
3 for each row
4 BEGIN
5 update relationships a set a.parentID = null where a.parentID = :OLD.ID;
6 delete from relationships a where a.id = :OLD.ID;
7 END MY_DELETE_TRIGGER;
8 /
Trigger created.
SQL> delete from tab1
2 where id = 1;
1 row deleted.
SQL> select * from relationships;
        ID   PARENTID
         2
SQL> rollback;
Rollback complete.
SQL> insert into relationships values(1,1);
1 row created.
SQL> select * from relationships;
        ID   PARENTID
         1          1
         2          1
         1          1
SQL> delete from tab1
2 where id = 1;
1 row deleted.
SQL> select * from relationships;
        ID   PARENTID
         2
SQL> disconnect
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.3.0 - 64bit Production
With the Partitioning option
JServer Release 9.2.0.3.0 - Production

ORA-04091: table is mutating, trigger/function may no

Hi all,
I'm trying to create a trigger, but I got the following:
ERROR at line 1:
ORA-04092: cannot ROLLBACK in a trigger
ORA-06512: at "PKG_PROJ", line 63
ORA-04091: table TBL_DATA is mutating, trigger/function may not see it
ORA-06512: at "T$D_INS_TDATA", line 4
ORA-04088: error during execution of trigger 'T$D_INS_TDATA'My trigger is:
CREATE OR REPLACE TRIGGER T$D_INS_TDATA
       AFTER INSERT ON TBL_DATA
       FOR EACH ROW
DECLARE
BEGIN
     PKG_PROJ.P$INSERT(:NEW.ID);
     COMMIT;
END;
/Where meu procedure is:
       PROCEDURE P$INSERT
           P_ID      IN TBL_DATA.ID%TYPE
       AS
       BEGIN
            INSERT INTO TBL_DETAIL
                ID_DETAIL,           DT_DETAIL, OBS,
            SELECT SEQ_DETAIL.NEXTVAL, SYSDATE, 'INSERT TRIGGER TEST'
            FROM TBL_DATA DC
            AND   DC.ID    = P_ID
            COMMIT WORK;
        EXCEPTION
                 WHEN OTHERS THEN
                     ROLLBACK;
                     RAISE_APPLICATION_ERROR(-20102, 'PKG_PROJ.P$INSERT: ' || SQLERRM);
       END P$INSERT;Somebody can help me???
thanx!!!! :-)

Tad,
I believe you're performing SELECT on the triggering table in the PL/SQL block. In simple words, you're trying to change the information of a table the TRIGGER is created for and you're trying to read data from the same table.
I suggest that you use PL/SQL pragma autonomous_transaction to resolve this, for as per Oracle documentation "The AUTONOMOUS_TRANSACTION pragma instructs the PL/SQL compiler to mark a routine as autonomous (independent). An autonomous transaction is an independent transaction started by another transaction, the main transaction. Autonomous transactions let you suspend the main transaction, do SQL operations, commit or roll back those operations, then resume the main transaction."
Furthermore, you can also refer to the following discussion by Thomas Kyte for further understanding of mutating tables:
Avoiding Mutating Tables
http://asktom.oracle.com/tkyte/Mutate/
Hope this helps.
Regards,
Naveed.

ORA-04091: table is mutating in a scenario

Hello everyone
I have a scenario like this:
There are 2 schemas USER1 and USER2. There is a table (say STATUS_TABLE) with similar structure in both the schemas. In a certain scenario USER1 needs to tell USER2 about a flag which needs to updated in USER2.STATUS_TABLE. For this an intermediate table (say INTER_TABLE) has been created. Now USER1 inserts an entry in INTER_TABLE table & there is an on insert trigger on INTER_TABLE which updates that flag in USER2.STATUS_TABLE. After this update is done, the record in INTER_TABLE is of no use and should be deleted. Now the delete statement in the same trigger on INTER_TABLE raises ORA-04091: table is mutating. The same thing has to hapeen in other direction as well (eg USER2 to USER1).
Something like this:
USER1.STATUS_TABLE          INTER_TABLE          USER2.STATUS_TABLE
                   1 row inserted
           ---------------->
                    trigger on insert------->update a flag here
                  delete that rec from INTER_TABLE
                     => ORA-04091: table is mutatingWhat would be the correct approach to implment this functionality ?
I hope i explained the scenario properly :) . If any more details required, please let me know
Thanks
Amardeep Sidhu

Hi,
in Oracle 11g you can use compund trigger to handle all in one.
Here is a sample for < Oracle 11g
CREATE OR REPLACE PACKAGE var
IS
TYPE id_tab IS TABLE OF NUMBER INDEX BY BINARY_INTEGER;
ids id_tab;
END;
CREATE TABLE inter_table (
id   NUMBER,
text VARCHAR2(10)
CREATE OR REPLACE TRIGGER bis_inter_table
BEFORE INSERT ON inter_table
BEGIN
var.ids.delete;
END;
CREATE OR REPLACE TRIGGER bir_inter_table
BEFORE INSERT ON inter_table FOR EACH ROW
BEGIN
var.ids(var.ids.count+1) := :NEW.id;
END;
CREATE OR REPLACE TRIGGER asi_inter_table
AFTER INSERT ON inter_table
BEGIN
FORALL n IN INDICES OF var.ids
    DELETE inter_table WHERE id = var.ids(n);
FORALL n IN INDICES OF var.ids
    UPDATE status_table SET flag = 1 WHERE id = var.ids(n);
END;
CREATE TABLE status_table (
id    NUMBER,
text1 VARCHAR2(10),
flag NUMBER
INSERT INTO status_table VALUES(1, 'Text1', 0);
INSERT INTO status_table VALUES(2, 'Text2', 0);
INSERT INTO status_table VALUES(3, 'Text3', 0);
INSERT INTO status_table VALUES(4, 'Text4', 0);
SELECT * FROM status_table;
SELECT * FROM inter_table;
INSERT INTO inter_table VALUES(1, 'Text1');
SELECT * FROM status_table;
SELECT * FROM inter_table;
COMMIT;...have fun :)

Table is mutating, trigger/function may not see it

Hi,
I have been trying to get a trigger to execute a stored procedure when an update is made to a row in a table.
The procedure works when ran manually and the trigger compiles but when the trigger is fired I get a "table is mutating, trigger/function may not see it" error.
Here's a bit more background:
I have a product table where the cost of a product is calculate based on costs in other tables (e.g. cost of raw materials is in the suppliesrawmat table).
I have written a procedure (called proc_costcalc) which takes in a productID and updates that product's cost in the product table.
I want a trigger to do this for every affected product when a rawmaterial cost is changed.
The code of my trigger is:
CREATE OR REPLACE trigger trig_rawcostupdate
AFTER INSERT OR UPDATE ON suppliesrawmat FOR EACH ROW
DECLARE
     cursor c1 is
     SELECT p.prodid
     FROM process p,
          (SELECT s.processid
          FROM stage s,
               (SELECT stageno
               FROM stagerawmat
               WHERE prodid = :new.prodid) subquery0
          WHERE s.stageno = subquery0.stageno) subquery1
     WHERE p.processid = subquery1.processid;
BEGIN
     FOR tuple in c1
     LOOP
          proc_costcalc(tuple.prodid);
     END LOOP;
END;
The query for the cursor generates a list of productIDs which I need to run through the proc_costcalc procedure.
Can anyone show me where I am going wrong? How can I fix this?
Thanks
Keith

I'm afraid I'm still not getting this.
Suppose I have 4 tables (product, madefrom, rawmat and suppliesrawmat).
Product (productid, cost)
Madefrom (productid, rawmatid)
Rawmat (rawmatid)
Suppliesrawmat (supplierid, rawmatid, cost)
The cost of a product should be the sum cost of all rawmaterials it is made from where the cheapest supply cost of that material is used.
What I want to do is update the cost of a product when the cost of a raw material used in its production changes.
My earlier attempt was to have a procedure which when given a productid updates the price of that product. However, when trying to call this procedure from an update on the suppliesrawmat table I recieved the table is mutating error. I now understand why (thanks to everyone for that) but I still don't really know how to rectify the problem.
How should I be doing this?
Thanks again
Keith

SQL, PL/SQL functions, and ORA-04091 table is mutating

Dears,
Recently a question came up in an Oracle French forum about an insert/select that is throwing ORA-04091: table xxxx is mutating, trigger/function may not see it error in 11g while the same insert/select was working very well in 10g. The original poster gave a scenario that is easily reproducible. I am wondering what database release is correct the one throwing the error(11g) or the other one accepting the insert/select(10g)?
*10g*
mhouri.world > select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE     10.2.0.4.0     Production
TNS for Solaris: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
mhouri.world > create table t_read_consistency (id number, vc varchar2(15), primary key (id));
Table created.
mhouri.world > insert into
2        t_read_consistency
3      select
4        rownum id,
5        rpad('a',15,'a')
6      from
7        dual
8      connect by
9        level<=1000;
1000 rows created.
mhouri.world > commit;
Commit complete.
mhouri.world > create or replace function f_read_consistency return varchar2
2       as
3        lv_vc t_read_consistency.vc%type;
4       begin
5         select trc.vc
6         into lv_vc
7          from t_read_consistency trc
8         where trc.id = 70 ;
9        return lv_vc;
10     end f_read_consistency;
11    /
Function created.
mhouri.world >insert into
2        t_read_consistency (id, vc)
3      select
4         1001
5        ,f_read_consistency
6      from dual;
      ,f_read_consistency
ERROR at line 5:
ORA-04091: table MHOURI.T_READ_CONSISTENCY is mutating, trigger/function may not see it
ORA-06512: at "MHOURI.F_READ_CONSISTENCY", line 5
_11g_
mohamed@mhouri> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE     11.2.0.1.0     Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
mohamed@mhouri> create table t_read_consistency (id number, vc varchar2(15), primary key (id));
Table created.
mohamed@mhouri> insert into
2    t_read_consistency
3 select
4    rownum id,
5    rpad('a',15,'a')
6 from
7    dual
8 connect by
9    level<=1000;
1000 rows created.
mohamed@mhouri> create or replace function f_read_consistency return varchar2
2   as
3    lv_vc t_read_consistency.vc%type;
4   begin
5     select trc.vc
6     into lv_vc
7      from t_read_consistency trc
8     where trc.id = 70 ;
9    return lv_vc;
10 end f_read_consistency;
11 /
Function created.
mohamed@mhouri> insert into
2    t_read_consistency (id, vc)
3 select
4     1001
5    ,f_read_consistency
6 from dual;
,f_read_consistency
ERROR at line 5:
ORA-04091: table MOHAMED.T_READ_CONSISTENCY is mutating, trigger/function may
not see it
ORA-06512: at "MOHAMED.F_READ_CONSISTENCY", line 5 So far so good. Same behaviour for both releases. But let's bring a small change to the PL/SQL function to be as close as the example given in the French Forum
_10g where the select/insert was working without error_:
mhouri.world > select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE     10.2.0.4.0     Production
TNS for Solaris: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
mhouri.world > create type t_read_cs as object (id number,vc varchar2(15));
2 /
Type created.
mhouri.world > create type t_read_cs_tab as table of t_read_cs;
2 /
Type created.
mhouri.world > create or replace function f_read_consistency_tab
2 return t_read_cs_tab
3    as
4      lc_t_read_cs_tab t_read_cs_tab := t_read_cs_tab();
5      j binary_integer := 0;
6    begin
7        for x in (select
8                      id,
9                      vc
10                   from t_read_consistency trs
11                  where trs.id <= 10
12       ) loop
13
14          j := j +1;
15          lc_t_read_cs_tab.extend;
16          lc_t_read_cs_tab(j) := t_read_cs(x.id, x.vc);
17     end loop;
18     RETURN lc_t_read_cs_tab;
19   end f_read_consistency_tab;
20 /
Function created.
mhouri.world > select count(1) from t_read_consistency;
COUNT(1)
      1000
mhouri.world > select count(1)
2 from (select * from table(f_read_consistency_tab));
COUNT(1)
        10
mhouri.world > insert into t_read_consistency
2         (id,vc)
3      select id,vc
4   from table(f_read_consistency_tab)
5 ;
10 rows created.
mhouri.world > select count(1) from t_read_consistency;
COUNT(1)
      1010
_11g where the same insert/select is throwing an error:_
mohamed@mhouri> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
mohamed@mhouri> create type t_read_cs as object (id number,vc varchar2(15));
2 /
Type created.
mohamed@mhouri> create type t_read_cs_tab as table of t_read_cs;
2 /
Type created.
mohamed@mhouri> create or replace function f_read_consistency_tab
2      return t_read_cs_tab
3        as
4          lc_t_read_cs_tab t_read_cs_tab := t_read_cs_tab();
5          j binary_integer := 0;
6        begin
7            for x in (select
8                          id,
9                          vc
10                      from t_read_consistency trs
11                     where trs.id <= 10
12          ) loop
13
14            j := j +1;
15             lc_t_read_cs_tab.extend;
16             lc_t_read_cs_tab(j) := t_read_cs(x.id, x.vc);
17        end loop;
18        RETURN lc_t_read_cs_tab;
19      end f_read_consistency_tab;
20    /
Function created.
mohamed@mhouri> select count(1) from t_read_consistency;
COUNT(1)
      1000
mohamed@mhouri> select count(1) from (select * from table(f_read_consistency_tab));
COUNT(1)
        10
mohamed@mhouri> insert into t_read_consistency
2            (id,vc)
3          select id,vc
4      from table(f_read_consistency_tab)
5     ;
    from table(f_read_consistency_tab)
ERROR at line 4:
ORA-04091: table MOHAMED.T_READ_CONSISTENCY is mutating, trigger/function may
not see it
ORA-06512: at "MOHAMED.F_READ_CONSISTENCY_TAB", line 7 In addition, one of the posters spotted out very judiciously that if we slightly change the definition of the table t_read_consistency in 11g, strangely the insert/select will work correctly in this data base as shown below:
ohamed@mhouri> drop table tr_read_consistency;
Table dropped.
mohamed@mhouri> create table tr_read_consistency
2      as select rownum rn,
3                trs.*
4      from
5         t_read_consistency trs;
Table created.
mohamed@mhouri> insert into tr_read_consistency
2                 (rn, id,vc)
3              select rownum, id,vc
4           from table(f_read_consistency_tab);
10 rows created.So is this a regression? or a corrected bug during upgrade?
Thanks in advance
Mohamed Houri

I just followed the doc links provided by Tubby, which have 100% Correct answer. See below :
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL> show user;
USER is "SCOTT"
SQL> create type t_read_cs as object (id number,vc varchar2(15));
2 /
Type created.
SQL> create type t_read_cs_tab as table of t_read_cs;
2 /
Type created.
SQL> create table t_read_consistency (id number, vc varchar2(15), primary key (id));
Table created.
SQL> create or replace function f_read_consistency_tab
2 return t_read_cs_tab
3 as
4 lc_t_read_cs_tab t_read_cs_tab := t_read_cs_tab();
5 j binary_integer := 0;
6 begin
7 for x in (select
8 id,
9 vc
10 from t_read_consistency trs
11 where trs.id <= 10
12 ) loop
13 j := j +1;
14 lc_t_read_cs_tab.extend;
15 lc_t_read_cs_tab(j) := t_read_cs(x.id, x.vc);
16 end loop;
17 RETURN lc_t_read_cs_tab;
18 end f_read_consistency_tab;
19 /
Function created.
SQL> insert into
2 t_read_consistency
3 select
4 rownum id,
5 rpad('a',15,'a')
6 from
7 dual
8 connect by
9 level<=1000;
1000 rows created.
SQL> select count(1) from t_read_consistency;
COUNT(1)
      1000
SQL> select count(1) from (select * from table(f_read_consistency_tab));
COUNT(1)
        10
SQL> insert into t_read_consistency
2 (id,vc)
3 select id,vc
4 from table(f_read_consistency_tab);
from table(f_read_consistency_tab)
ERROR at line 4:
ORA-04091: table SCOTT.T_READ_CONSISTENCY is mutating, trigger/function may not see it
ORA-06512: at "SCOTT.F_READ_CONSISTENCY_TAB", line 7
SQL> ed
Wrote file afiedt.buf
1 create or replace function f_read_consistency_tab
2 return t_read_cs_tab
3 as
4 lc_t_read_cs_tab t_read_cs_tab := t_read_cs_tab();
5 j binary_integer := 0;
6 PRAGMA AUTONOMOUS_TRANSACTION; <--- This works as documented in 11.2.0.1
7 begin
8 for x in (select
9 id,
10 vc
11 from t_read_consistency trs
12 where trs.id <= 10
13 ) loop
14 j := j +1;
15 lc_t_read_cs_tab.extend;
16 lc_t_read_cs_tab(j) := t_read_cs(x.id, x.vc);
17 end loop;
18 RETURN lc_t_read_cs_tab;
19* end f_read_consistency_tab;
SQL> /
Function created.
SQL> insert into t_read_consistency
2 (id,vc)
3 select id,vc
4 from table(f_read_consistency_tab);
insert into t_read_consistency
ERROR at line 1:
ORA-00001: unique constraint (SCOTT.SYS_C0011307) violated
SQL> drop table t_read_consistency purge;
Table dropped.
SQL> create table t_read_consistency (id number, vc varchar2(15));
Table created.
SQL> insert into
2 t_read_consistency
3 select
4 rownum id,
5 rpad('a',15,'a')
6 from
7 dual
8 connect by
9 level<=1000;
1000 rows created.
SQL> commit;
Commit complete.
SQL> insert into t_read_consistency
2 (id,vc)
3 select id,vc
4 from table(f_read_consistency_tab);
10 rows created.
SQL> commit;
Commit complete.
SQL>So, you have to add only PRAGMA AUTONOMOUS_TRANSACTION; before begin in your function code to avoid ORA-04091 in 11.2.0.1
But, All thanks to Tubby who pointed us to the correct documentation link.
Regards
Girish Sharma

Table is mutating, trigger/function may not

hi
while executing this:
SQL> insert into LIB_ACCESSION_LOG select * from LIB_ACCESSION_LOG11;
insert into LIB_ACCESSION_LOG select * from LIB_ACCESSION_LOG11
ERROR at line 1:
ORA-04091: table QA.LIB_ACCESSION_LOG is mutating, trigger/function may not
see it
ORA-06512: at "QA.TRG_ACCESSION_LOG", line 2
ORA-04088: error during execution of trigger 'QA.TRG_ACCESSION_LOG'
how can i do this insert and resolve this error. should i switch off the constraints? and what will happen when i switch on the constraints?

Hi,
what is the contents for trigger QA.TRG_ACCESSION_LOG?
cheers

Table is mutating, trigger/function may not seen it

Hi
My work is before delete this record the same values can be stored into the temporary table..
Trigger
CREATE OR REPLACE TRIGGER TEST_TRIGGER
BEFORE DELETE ON py_test
for each row
DECLARE
EMP_ID py_test%ROWTYPE;
CURSOR C1 IS SELECT ID,NAME FROM py_test where id=:old.ID;
begin
FOR EMP_ID IN C1
LOOP
-- DBMS_OUTPUT.PUT_LINE(EMP_ID.ID);
INSERT INTO TEMP_TABLE VALUES(EMP_ID.ID,EMP_ID.NAME);
END LOOP;
END;
delete from py_test where id=1;
ERROR at line 1:
ORA-04091: table TRIGGTEST.PY_TEST is mutating, trigger/function may not see it..
Pls help..
Thanks

Hi,
I took Rob's example and inserted one more row in "PY_TEST" table for ID=1 and it works perfectly. Have a look:
SQL> create table py_test
2   as
3   select 1 id, 'Name1' name from dual union all
4   select 2, 'Name2' from dual
5   /
Table created.
SQL> select * from py_test;
        ID NAME
         1 Name1
         2 Name2
SQL> insert into py_test values (1, 'NameN');
1 row created.
SQL> commit;
Commit complete.
SQL> select * from py_test;
        ID NAME
         1 Name1
         2 Name2
         1 NameN
SQL> create table temp_table
2   ( id number(10)
3   , name varchar2(30)
4   )
5   /
Table created.
SQL> create or replace trigger test_trigger
2   before delete on py_test
3   for each row
4   begin
5     insert into temp_table values (:old.id, :old.name);
6   end;
7   /
Trigger created.
SQL> delete from py_test where id = 1;
2 rows deleted.
SQL> select * from temp_table;
        ID NAME
         1 Name1
         1 NameN
SQL>

ORA-04091: Table is mutating

Hi all!
I have a problem that maybe some of you can answer.
I have two tables, table A and table B,
the point is that i want to delete one record from table A when Table B has no records with some condition,
i try this using an AFTER DELETE Trigger on Table B, checking there if there are no records but the error ORA-04091 appears.
Someone have an idea on how to solve this?
thx in advance!

I would take this over to the PL/SQL Forum (PL/SQL instead. You'll get way more experts over there and more accurate answers especially since this is not really specific to Apex.

Rgding ORA-04091:table PURCHSE_DTL is mutating,trigger/function maynot c it

I wrote a trigger 'TRG_PURCHASE_DTL' to update the stock table 'BRANCH_ITEM_STOCK' based on the DML actions perfomed on tables PURCHASE_DTL and ISSUE_DTL, but I am getting following error:-
ORA-04091: table PURCHASE_DTL is mutating, trigger/function may not see it
and the value of 'BRANCH_ITEM_STOCK.purchase_qty' is updated to 10 instead of 18.
The table structure and data is given below:
-- ============================================================
-- Table: BRANCH_ITEM_STOCK
-- ============================================================
create table BRANCH_ITEM_STOCK
BRANCH_CODE NUMBER(6) not null,
ITEM_CODE NUMBER(6) not null,
PURCHASE_QTY NUMBER(6) null ,
RECEIPT_QTY NUMBER(6) null ,
ISSUE_QTY NUMBER(6) null ,
BALANCE_QTY NUMBER(6) null ,
REMARKS VARCHAR2(100) null ,
constraint PK_RA25_BRANCH_ITEM_STOCK primary key (BRANCH_CODE, ITEM_CODE)
-- ============================================================
-- Table: PURCHASE_MST
-- ============================================================
create table PURCHASE_MST
BRANCH_CODE NUMBER(6) not null,
PURCHASE_YR NUMBER(6) not null,
PURCHASE_NO NUMBER(6) not null,
PURCHASE_DT DATE not null,
QUOTATION_NO NUMBER(6) not null,
QUOTATION_YR NUMBER(4) not null,
VENDOR_CODE NUMBER(6) not null,
RECEIPT_NO VARCHAR2(25) null ,
constraint PK_PURCHASE_HDR primary key (BRANCH_CODE, PURCHASE_YR, PURCHASE_NO)
-- ============================================================
-- Table: PURCHASE_DTL
-- ============================================================
create table PURCHASE_DTL
BRANCH_CODE NUMBER(6) not null,
PURCHASE_YR NUMBER(6) not null,
PURCHASE_NO NUMBER(6) not null,
REC_SNO NUMBER(6) not null,
ITEM_CODE NUMBER(6) not null,
ITEM_QTY NUMBER(6) not null,
ITEM_PRICE NUMBER not null,
ITEM_AMT NUMBER not null,
constraint PK_PURCHASE_DTL primary key (BRANCH_CODE, PURCHASE_YR, PURCHASE_NO, REC_SNO)
-- ============================================================
-- Table: ISSUE_MST
-- ============================================================
create table ISSUE_HDR
BRANCH_CODE NUMBER(6) not null,/* Issued from Branch*/
ISSUE_YR NUMBER(6) not null,
ISSUE_NO NUMBER(6) not null,
ISSUE_DT DATE not null,
ISSUED_BY VARCHAR2(15) not null,
ISSUED_TO_BRANCH VARCHAR2(15) not null,
ISSUE_STATUS NUMBER(6) null,
constraint PK_ISSUE_HDR primary key (BRANCH_CODE, ISSUE_YR, ISSUE_NO)
-- ============================================================
-- Table: ISSUE_DTL
-- ============================================================
create table ISSUE_DTL
BRANCH_CODE NUMBER(6) not null,
ISSUE_YR NUMBER(6) not null,
ISSUE_NO NUMBER(6) not null,
REC_SNO VARCHAR2(25) not null,
ITEM_CODE NUMBER(6) not null,
ITEM_DTL VARCHAR2(400) null ,
ITEM_QTY NUMBER(6) null ,
RECEIPT_QTY NUMBER(6) null ,
constraint PK_RA25_ISSUE_DTL primary key (BRANCH_CODE, ISSUE_YR, ISSUE_NO, REC_SNO)
Assume that the Contents of PURCHASE_MST is as follows:
SELECT branch_code, purchase_yr, purchase_no FROM PURCHASE_HDR;
BRANCH_CODE PURCHASE_YR PURCHASE_NO
100          2008          1
100          2009          1
100          2009          2
Now I tried to insert follwing values to the PURCHASE_DTL table:
insert into purchase_dtl (BRANCH_CODE,PURCHASE_YR,PURCHASE_NO,rec_sno,
ITEM_CODE,item_QTY)
Values (100,2008,1,1,4,5)
insert into purchase_dtl (BRANCH_CODE,PURCHASE_YR,PURCHASE_NO,rec_sno,
ITEM_CODE,item_QTY)
Values (100,2009,1,1,4,2)
insert into purchase_dtl (BRANCH_CODE,PURCHASE_YR,PURCHASE_NO,rec_sno,
ITEM_CODE,item_QTY)
Values (100,2009,2,1,4,6)
commit
Now Contents of table ' PURCHASE_DTL ' is as follows:
BRANCH_CODE PURCHASE_YR PURCHASE_NO     REC_SNO ITEM_CODE     ITEM_QTY
100          2008          1     1          4     5
100          2009          1     1          4     2
100          2009          2     1          4     6
I want to write a trigger which will insert/update/delete data into/from BRANCH_ITEM_STOCK,
so that the contents of column Purchase_qty of table BRANCH_ITEM_STOCK should be as follows:
BRANCH_CODE     ITEM_CODE     PURCHASE_QTY     RECEIPT_QTY     ISSUE_QTY     BALANCE_QTY
100          4          13          0          0          13
[Note: i.e BRANCH_ITEM_STOCK.PURCHASE_QTY = SUM(PURCHASE_DTL.item_qty)
     where PURCHASE_DTL.branch_code=100
     AND PURCHASE_DTL.item_code=4
Now run the following update statement.
update purchase_dtl
set item_qty= 10
where BRANCH_code=100
and purchase_yr in ( 2008) and purchase_no =1 and rec_sno = 1 AND item_code = 4
commit
Now the actual contents of column Purchase_qty of table BRANCH_ITEM_STOCK should be updated as follows:
BRANCH_CODE     ITEM_CODE     PURCHASE_QTY     RECEIPT_QTY     ISSUE_QTY     BALANCE_QTY
100          4          18          0          0          18
But I am facing problem here. I am getting following error:-
ORA-04091: table PURCHASE_DTL is mutating, trigger/function may not see it
and the value of purchase qty is updated to 10 instead of 18
Similarly if any issue of items happen (for eg:- issue_qty=2 to branch_code 200), then the purchase_qty =18,issue_qty=2 , balance_qty:=18-2=16 .
So for branch_code 200 , receipt_qty = 2.
Pls help me how to achieve the above .
Source code which I tried is given below : (but confused at the end )..please help
CREATE OR REPLACE TRIGGER trg_purchase_dtl
BEFORE INSERT ON PURCHASE_DTL
for each row
declare
-- local variables here
l_qty number(6);
l_cnt NUMBER;
BEGIN
BEGIN
SELECT COUNT(*) into l_cnt
FROM BRANCH_item_stock b
WHERE b.BRANCH_code = :new.BRANCH_code
AND b.item_code = :new.item_code ;
dbms_output.put_line('1.after selet cnt= '||l_cnt);
EXCEPTION when no_data_found then
l_cnt := 0;
dbms_output.put_line('2.in expt NDF selet cnt= '||l_cnt);
null;
END;
IF INSERTING THEN
dbms_output.put_line('3.before if ...going to insert ');
IF l_cnt = 0 THEN
dbms_output.put_line('hihhiii.......lcnt=0...item_code='||:old.item_code||'~l_qty='||l_qty);
IF INSERTING THEN
     INSERT INTO BRANCH_ITEM_STOCK
(BRANCH_code,Item_Code, PURCHASE_QTY,RECEIPT_QTY, issue_qty, balance_qty)
     VALUES(:NEW.BRANCH_code,:NEW.Item_Code, :NEW.ITEM_QTY,0, 0, 0);
END IF;
ELSIF l_cnt >0 THEN
SELECT purchase_qty into l_qty
FROM BRANCH_Item_Stock
WHERE BRANCH_code = :new.BRANCH_code
AND item_code = :new.item_code ;
l_qty := l_qty + :NEW.ITEM_QTY;
dbms_output.put_line('6.after selet qty= '||l_qty ||'~new qty='||:NEW.ITEM_QTY||'~old qty='||:OLD.ITEM_QTY);
dbms_output.put_line('7.before update '||l_qty);
-- IF INSERTING OR UPDATING THEN
UPDATE BRANCH_ITEM_STOCK
          SET PURCHASE_QTY = l_qty
          WHERE BRANCH_code = :new.BRANCH_code
AND item_code = :new.item_code ;
dbms_output.put_line('8.after update= '||l_qty);
--END IF;
END IF;
END IF; -- end of INSERTING
-- END;
--EXCEPTION WHEN DUP_VAL_ON_INDEX THEN
     IF UPDATING THEN
          dbms_output.put_line('9.if UPDATING...qty= '||l_qty ||'~new qty='||:NEW.ITEM_QTY||'~old qty='||:OLD.ITEM_QTY);
BEGIN
dbms_output.put_line('~old unotcode='||:old.BRANCH_code||'~old.item_code='||:OLD.ITEM_CODE||'~old itemqty='||:old.item_qty);
dbms_output.put_line('~new unotcode='||:new.BRANCH_code||'~new.item_code='||:new.ITEM_CODE||'~new itemqty='||:new.item_qty);
SELECT NVL(SUM(item_qty), 0) into l_qty
     FROM Ra25_Purchase_Dtl
     WHERE BRANCH_code IN ( :old.BRANCH_code )
     AND item_code in ( :old.item_code)
     AND item_qty <> :old.item_code ;
EXCEPTION WHEN OTHERS THEN
dbms_output.put_line('10.in EWO'||sqlerrm);
END;
--l_qty := l_qty + :NEW.ITEM_QTY;
dbms_output.put_line('11.after selet qty= '||l_qty ||'~new qty='||:NEW.ITEM_QTY||'~old qty='||:OLD.ITEM_QTY);
     UPDATE BRANCH_ITEM_STOCK
          SET PURCHASE_QTY = l_qty      --:new.item_qty
          WHERE BRANCH_code = :old.BRANCH_code
          AND item_code = :old.item_code ;
          dbms_output.put_line('13.after update ');
     END IF;
IF DELETING THEN
DELETE FROM BRANCH_ITEM_STOCK
WHERE BRANCH_CODE = :OLD.BRANCH_code
AND ITEM_CODe = :OLD.item_code;
END IF;
end trg_purchase_dtl;
Please help me how to resolve this problem asap.
-------------------------------------------------------------------------------------------------------------------------------------------------

Hi,
Welcome to the forum!
See this thread [Avoiding Mutating Tables|http://asktom.oracle.com/tkyte/Mutate/index.html]
Tip: to preserve formatted code enclose it between {noformat}{noformat} tags (start and end tags are the same) :)
Thank you for posting DDL and DML of basic data, all people that post should follow this approach.
Regards,

ORA-04091 table string.string is mutating, trigger/function may not see it

When I am tending to delete something from my table I received this message.
I defined a PL/SQL function reads data from that table. Is that meaning I could not modify anything in table once I have some PL/SQL defined on that? It sounds ridiculour. Or I missed some points?
Anyone could help me out?
Many thanks,
Qiang

In get_point_coordinates(point_id, layerid), it does not have any codes deleting thing from point_tab.
Its functionality is to find out that specified point;
put its coordinates into SDO_GEOMETRY object and return as function value.
However, oracle does not allow me to delete any data from point table since then.It is saying that function (get_point_coordinates) can not know mutating tables.
When I run delete task:
delete from point$_view where point_id = 1;
I got errors:
ERROR at line 1:
ORA-04091: table POINT$_TABLE is mutating, trigger/functio
n may not see it
ORA-06512: at "GET_POINT_COORDINATES", /* THIS LINE REPORS ERROR*/ Look at codes below.
The following is code of function: GET_POINT_COORDINATES
FUNCTION GET_POINT_COORDINATES(pPoint_ID IN NUMBER, player_ID IN NUMBER)
RETURN MDSYS.SDO_GEOMETRY DETERMINISTIC IS
PSRID NUMBER :=NULL:
PLON NUMBER := NULL;
PLAT NUMBER := NULL;
CURSOR get_lonlat(ppoint_id IN NUMBER, player_id IN NUMBER) IS SELECT LON,LAT
FROM POINT$_VIEW /* THIS LINE REPORS ERROR*/
WHERE player_id = layer_id AND ppoint_id = point_id;
BEGIN
PSRID := 8265;
OPEN get_lonlat(pPoint_ID,Player_ID);
FETCH get_lonlat INTO PLON, PLAT;
RETURN MDSYS.SDO_GEOMETRY(2001,PSRID,MDSYS.SDO_POINT_TYPE(PLON,PLAT,NULL),NULL ,NULL);
END GET_POINT_GEOM;
I guess it has nothing with foreign key. There is something wrong with this function.
By the way, a spatail index is built on this function. Does this make any differences on this point?

ORA-04091: table AM is mutating, trigger/function may not see it

I create this trigger:
CREATE OR REPLACE TRIGGER pr_test
after insert ON AM
FOR EACH ROW
declare
appo_pr varchar2(64):= null;
BEGIN
select name
into appo_pr
from AS
where AS_ID=:new.AS_ID;
insert into AM (name) values (appo_pr);
END pr_test;
I insert before a new AS_ID and name in tab AS but when I insert a new record in tab AM I get this error:
ORA-04091: table AM is mutating, trigger/function may not see it
ORA-06512: at PR_TEST", line 11
ORA-04088: error during execution of trigger PR_TEST'
I'd like to create a trigger that when I insert a new record in AM It verify the value in col name of AS and insert this value in col name of AM.
What I wrong in this trigger??
How can I modify it??
Thanks
Raf

Try this:
CREATE OR REPLACE TRIGGER pr_test
before insert ON AM
FOR EACH ROW
declare
appo_pr AS.name%TYPE;
BEGIN
select name
into appo_pr
from AS
where AS_ID = :new.AS_ID;
:new.name = appo_pr;
END pr_test;

ORA-04091:table XYZ is mutating,trigger/function may not see it ORA-06512

Hi everybody
i am facing mutating problem during data deletion fron XYZ table as
ORA-04091:table XYZ is mutating,trigger/function may not see it ORA-06512 at "user.procdure_name",line 39 ORA-065
i have table XYZ and have database trigger on this table
and also have procedure "user.abc" in this procedure m selecting data from xyz table

You didn't post the actual code. I was more interested in seeing table name and the trigger body.
Anyways, mutation problem comes when you refer the same table on the trigger, on which it is based for some data manipulation on that table.
For e.g, If inside your trigger body, you are doing INSERT on the same table, then it'll definitely result in mutation problem because this trigger will be fired endlessly (as it is after insert trigger).
Please mark answer as helpful / correct, if it helps you
Navnit

ORA-04091: table ACCESSLOG is mutating, trigger/function may not see it

Hi
Got the following error
ORA-04091: table ACCESSLOG is mutating, trigger/function may not see it
i searched the error found that the problem is with FOR EACH ROW
how can i handel this specifically with the following code:
CREATE OR REPLACE TRIGGER EMP_ACCESS
AFTER INSERT
ON ACCESSLOG
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
DECLARE
tmpVar NUMBER;
BEGIN
IF ( :NEW.INOUT = 'OUT' ) THEN
SELECT 'X'
INTO tmpVar
FROM ACCESSLOG
WHERE EMPLOYEEID = :NEW.EMPLOYEEID
AND LOGDATE = :NEW.LOGDATE
AND INOUT ='IN' ;
IF tmpVar IS NULL THEN
INSERT INTO Emp_All_Moves_Absent (
EMP_NO,
ATT_DATE,
ATT_FLAG,
ATT_TIME_IN,
ATT_TIME_OUT,
VAC_COD,
MIS_CODE,
DAY_FLAG ,
POSTEDFLAG,
ATT_TIME_IN_PLANNED,ATT_TIME_OUT_PLANNED)
VALUES
(to_number(to_char(:NEW.employeeid,99999)),
TO_DATE(:NEW.LOGDATE,'DD/MM/YYYY'),
'ABS' ,
to_date(:NEW.LOGTIME,'HH24:MI:SS'),
to_date(:NEW.LOGTIME,'HH24:MI:SS'),
NULL,
NULL,
'WORK',
0,
NULL,NULL);
END IF;
ELSIF ( :NEW.INOUT = 'IN' ) THEN
SELECT 'X'
INTO tmpVar
FROM ACCESSLOG
WHERE EMPLOYEEID = :NEW.EMPLOYEEID
AND LOGDATE = :NEW.LOGDATE-1
AND INOUT ='IN' ;
IF tmpVar IS NULL THEN
INSERT INTO Emp_All_Moves_Absent (
EMP_NO,
ATT_DATE,
ATT_FLAG,
ATT_TIME_IN,
ATT_TIME_OUT,
VAC_COD,
MIS_CODE,
DAY_FLAG ,
POSTEDFLAG,
ATT_TIME_IN_PLANNED,ATT_TIME_OUT_PLANNED)
VALUES
(to_number(to_char(:NEW.employeeid,99999)),
TO_DATE(:NEW.LOGDATE-1,'DD/MM/YYYY'),
'ABS' ,
to_date(:NEW.LOGTIME,'HH24:MI:SS'),
to_date(:NEW.LOGTIME,'HH24:MI:SS'),
NULL,
NULL,
'WORK',
0,
NULL,NULL);
END IF;
END IF;
EXCEPTION
WHEN OTHERS THEN
-- Consider logging the error and then re-raise
RAISE;
END EMP_ACCESS_LOG_OUT;
Urgent help is highly appreciated..
Regards,
Abdetu..

Thanks Jens Petersen for reply
now i want to make sure of one thing that i have to follow the steps but the last one i will replace it with my trigger NO?
SQL> create or replace package state_pkg
2 as
3 type ridArray is table of rowid index by binary_integer;
4
4 newRows ridArray;
5 empty ridArray;
6 end;
7 /
Package created.
SQL> create or replace trigger parent_bi
2 before insert or update on parent
3 begin
4 state_pkg.newRows := state_pkg.empty;
5 end;
6 /
Trigger created.
SQL> create or replace trigger parent_aifer
2 after insert or update of status on parent for each row
3 begin
4 state_pkg.newRows( state_pkg.newRows.count+1 ) := :new.rowid;
5 end;
6 /
Trigger created.
---------------------now come my trigger instead of the following one ??---------------
SQL> create or replace trigger parent_ai
2 after insert or update of status on parent
3 begin
4 for i in 1 .. state_pkg.newRows.count loop
5 insert into log_table
6 select theKey, status, effDate
7 from parent where rowid = state_pkg.newRows(i);
8 end loop;
9 end;
10 /
Trigger created.
Regards,
Abdetu..

ORA-04091: table name is mutating, trigger/function may not see it

Hi,
I have a row level before update trigger written on a table A which calls a procedure to undergo some processing. Procedure has some select queries against table A and it inturn causes the following error.
ORA-04091: table name is mutating, trigger/function may not see it
To overcome this I have used a combination of PL/SQL collection types (nested tables based on the following definition TYPE t_table_a is table of A.colname%TYPE index by binary_integer;), a row level before update trigger and statement level after update trigger. The mutating problem is fixed, but to update one row of data it took around 3 min and I am wondering if its the problem with PL/SQL tables I have used.
In before update trigger I am storing the unique id's which needs to be updated into the PL/SQL table and in the after update trigger I am looping through the PL/SQL table and peforming the rest of the processing by calling in the procedure.
Can anyone help how to minimize the run time of this process or if any other better solution exists?
Thanks for the help

Triggers raise the mutating table issue, because else they could be used to create endless loops. If you work around the mutating table issue, then you should make sure not to create an endless loop yourself. This would be possible.
You description also seems to imply something like this.
Without code it is impossible to say something specific.
- Do you initialize your collection in a before statement trigger?
- Is your looping mechanism somehow broken?
- Do you update the same table again and again and again?

ORA-04091: table is mutating, trigger/function

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