End of communication channel on creating Materialized view

Dear All,
I've Oracle Enterprise Edition(ver 9.0.1.1.1) running on Windows Xp Home Edition, When I run the following statement to create a materialized view I got the famous error ORA-03113: end-of-file on communication channel.And the strange thing is that after this I got disconnected from the database and when I tried to reconnect it showed an Error "Shared memory not available". I was forced to restart my database.
CREATE MATERIALIZED VIEW CUVF_MVIEW
TABLESPACE USERS
NOCACHE
NOPARALLEL
BUILD IMMEDIATE
REFRESH COMPLETE
ON DEMAND
START WITH
TO_DATE('08-DEC-2003 11:00:00','dd-mon-yyyy hh24:mi:ss')
NEXT trunc(sysdate) +13/24
WITH ROWID
USING DEFAULT LOCAL ROLLBACK SEGMENT
DISABLE QUERY REWRITE AS
SELECT *
FROM mySchema.Trasaction_FACT@test_link cuvf
WHERE
REFERENCE_DT BETWEEN TRUNC(ADD_MONTHS(SYSDATE,-1),'MON')
AND LAST_DAY(TRUNC(ADD_MONTHS(SYSDATE,-1),'MON'))

Like other poster suggested, please post some sample code, query your used to build the view (you can scramble the real table/column name as your wish) and the actual screen capture of the error.
This will help others to help you. Right now you are only describing symptoms while no one has idea what it really is.

Similar Messages

End of communication channel when select from view

We are using DB 10.0.2.0.2 and when we run select statement from view it gives End of communication channel error but when we run the query by using the sql in the view it works fine.
Please advise what may be wrong.

Like other poster suggested, please post some sample code, query your used to build the view (you can scramble the real table/column name as your wish) and the actual screen capture of the error.
This will help others to help you. Right now you are only describing symptoms while no one has idea what it really is.

Error Creating Materialized View With a Job

Oracle 9ir2
I've created a job like this in a java class:
...Java Code ...
cs = conn.prepareCall ("DECLARE v_job NUMBER; BEGIN DBMS_JOB.SUBMIT(v_job,'begin CTH_REGENERA_VM; end;', TRUNC(SYSDATE+1) + (3/24)); END;");
...Java Code ...
The Procedure called in the Job:
CREATE OR REPLACE PROCEDURE CTH_REGENERA_VM
     AUTHID CURRENT_USER IS
     existe NUMBER(1);
     cur BINARY_INTEGER := DBMS_SQL.OPEN_CURSOR;
     fdbk BINARY_INTEGER;
BEGIN
     SELECT count(*) INTO existe FROM user_mviews WHERE mview_name = 'CTH_PRESENTA_A_VM';
     IF existe > 0 THEN
          DBMS_SQL.PARSE(cur, 'DROP MATERIALIZED VIEW CTH_PRESENTA_A_VM', DBMS_SQL.NATIVE);
     fdbk := DBMS_SQL.EXECUTE(cur);
          INSERT INTO CTH_HISTORIAL VALUES('ELIMINADA VM CTH_PRESENTA_A_VM', SYSDATE);
          COMMIT;
     END IF;
     DBMS_SQL.PARSE(cur, 'CREATE MATERIALIZED VIEW CTH_PRESENTA_A_VM
     TABLESPACE DAT1_CTH
     STORAGE(INITIAL 16M NEXT 8M MINEXTENTS 1 MAXEXTENTS UNLIMITED PCTINCREASE 0)
               XMLTYPE XML STORE AS CLOB (           TABLESPACE DAT1_CTH
               STORAGE(INITIAL 16M NEXT 8M MINEXTENTS 1 MAXEXTENTS UNLIMITED PCTINCREASE 0))
     AS select FICHA, XML,
     extractvalue(xml, ''/FICHE/Encab_de_nombre_geogr�fico_a'') as MUNICIPIO,
     extractvalue(xml, ''/FICHE/Encab_de_nombre_geogr�fico_c'') as CALIFICACION,
     extractvalue(xml, ''/FICHE/Encab_de_nombre_geogr�fico_b'') as PROVINCIA,
     extractvalue(xml, ''/FICHE/Encab_tem�tico_de_materia_a[1]'') as MATERIA,
     extractvalue(xml, ''/FICHE/Fecha_cronol�gica_b[1]'') as FECHA,
     extractvalue(xml, ''/FICHE/Datos_matem�ticos_a[1]'') as ESCALA
     from cth_xmltable', DBMS_SQL.NATIVE);
     INSERT INTO CTH_HISTORIAL VALUES('ASIGNO EL PARSE DE MATERIALIZED', SYSDATE);
     fdbk := DBMS_SQL.EXECUTE(cur);
     INSERT INTO CTH_HISTORIAL VALUES('EJECUTO EL PARSE DE MATERIALIZED', SYSDATE);
     INSERT INTO CTH_HISTORIAL VALUES('CREADA VM CTH_PRESENTA_A_VM', SYSDATE);
     DBMS_SQL.PARSE(cur, 'CREATE INDEX CTH_INDEX1
     ON CTH_PRESENTA_A_VM(XML)
     INDEXTYPE IS CTXSYS.CONTEXT
     PARAMETERS (''storage cth section group ctxsys.auto_section_group'')', DBMS_SQL.NATIVE);
     fdbk := DBMS_SQL.EXECUTE(cur);
     INSERT INTO CTH_HISTORIAL VALUES('CREADO INDICE ORACLE TEXT CTH_INDEX1', SYSDATE);
     DBMS_SQL.PARSE(cur, 'CREATE INDEX CTH_IDX_MUNICIPIO3
          ON CTH_PRESENTA_A_VM(UPPER(MUNICIPIO))
          TABLESPACE IDX1_CTH
          STORAGE (INITIAL 1M NEXT 512K MINEXTENTS 1 MAXEXTENTS UNLIMITED PCTINCREASE 0)', DBMS_SQL.NATIVE);
     fdbk := DBMS_SQL.EXECUTE(cur);
     INSERT INTO CTH_HISTORIAL VALUES('CREADO INDICE CTH_IDX_MUNICIPIO2', SYSDATE);
     DBMS_SQL.PARSE(cur, 'CREATE INDEX CTH_IDX_FICHA2
     ON CTH_PRESENTA_A_VM
     (FICHA)
     TABLESPACE IDX1_CTH
     STORAGE(INITIAL 1M NEXT 512K MINEXTENTS 1 MAXEXTENTS UNLIMITED PCTINCREASE 0)', DBMS_SQL.NATIVE);
     fdbk := DBMS_SQL.EXECUTE(cur);
     INSERT INTO CTH_HISTORIAL VALUES('CREADO INDICE CTH_IDX_FICHA2', SYSDATE);
     DBMS_SQL.CLOSE_CURSOR(cur);
COMMIT;
END;
I got always an error in the created materialized view. If I call the procedure with SQL Plus, it run ok. The user
has CTXAPP, DBA roles, so I supouse it is not a privileges problem. I also tried to create a simple materialized view or a table, and always got an error ora-12011
Thanks in advance.

If I call the procedure with SQL Plus, it run ok. Are you using the same user to run it in SQL*Plus as runs it from Java.
The normal reason for procedures to fail like this is privileges. Particularly, we cannot run procedures using privileges we have been granted through roles.
The user has CTXAPP, DBA roles, so I supouse it is not a privileges problem. Try granting the system privilege CREATE MATERIALIZED VIEW to the user and see what happens.
I drop the materialized and create again, cause it's the fastest way I've found. With a DBMS_MVIEW.REFRESH is too slow.I find that surprising as drop & create has to do all the work that a refresh has to do plus some more - maybe it's something to do with XML. Did you try adding a snapshot log and going for FAST? I don't know whwther the XML procesing would render the view complex - have you explained it?
Cheers, APC

Error creating materialized view log using DBlink

Hi guys,
I have 2 databases in diferent machines . (machine A and B)
Machine A is my production database and I have a database link in machine B accessing Machine A
CREATE MATERIALIZED VIEW vm_test
BUILD IMMEDIATE
REFRESH FAST ON commit as
select * from test@A
-- no problem in this first operation the materialized view was created sucessfully
Now I need to create the LOG
SQL> CREATE MATERIALIZED VIEW LOG ON test
2 PCTFREE 5
3 TABLESPACE prodemge_2006
4 STORAGE (INITIAL 10K NEXT 10K);
CREATE MATERIALIZED VIEW LOG ON test
ERROR at line 1:
ORA-02050: transaction 5.21.8771 rolled back, some remote DBs may be in-doubt
ORA-02068: following severe error from A
ORA-03113: end-of-file on communication channel
What could be causing this error ?
Thank you,
Felipe

ORA-02050 transaction string rolled back, some remote DBs may be in-doubt
Cause: Network or remote failure during a two-phase commit.
Action: Notify operations; remote databases will automatically re-sync when the failure is repaired.
ORA-02068 following severe error from stringstring
Cause: A severe error (disconnect, fatal Oracle error) was received from the indicated database link. See following error text.
Action: Contact the remote system administrator.
M.S.Taj

Error while creating Materialized View in AWM

Hello,
I am using Oracle 11g with Analytic WorkSpace Manager 11.1.0.6.0A
I am trying to create materialized view on my Cube..
The Cube has 5 Dimensions out of which Four are having two levels i.e.,
TotalA-->DimensionA
TotalB-->DimensionB...and so on
And one time Dimension having 4 levels
TotalTime-->YEAR-->QUARTER-->MONTH
When i try to create the materialized view, i get an error saying that
"Your metadata changes have been saved, with the following errors
CREATE MATERIALIZED VIEW "ENT.CB$TIME_TIME_HIER"
ORA-02267:column type incompatible with referenced column type"
When i googled regarding this error, it says to change the datatype of the column..
But which column's data type is to be changed..Please throw some light regarding this...
Awaiting for reply..

My query is as follows:
SELECT
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.level_name='ALL_MODE' AND m.LONG_DESCRIPTION = 'Type1')then 1 else 0 end)) as Cumm_Type1Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.level_name='ALL_MODE' AND m.LONG_DESCRIPTION = 'Type2')then 1 else 0 end)) as Cumm_Type2Txn_Amount,
sum(cd.SALESAMT *(case when (k.LONG_DESCRIPTION='product1'AND l.level_name='ALL_MODE'AND m.LONG_DESCRIPTION = 'Type1' )then 1 else 0 end)) as Cumm_product1_Type1Txn_Amount,
sum(cd.SALESAMT *(case when (k.LONG_DESCRIPTION='product1'AND l.level_name='ALL_MODE'AND m.LONG_DESCRIPTION = 'Type2')then 1 else 0 end)) as Cumm_product1_Type2Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.LONG_DESCRIPTION='Mode1'AND m.LONG_DESCRIPTION = 'Type1')then 1 else 0 end)) as Cumm_Mode1_Type1Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.LONG_DESCRIPTION='Mode1'AND m.LONG_DESCRIPTION = 'Type2')then 1 else 0 end)) as Cumm_Mode1_Type2Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.LONG_DESCRIPTION='Mode2'AND m.LONG_DESCRIPTION = 'Type1')then 1 else 0 end)) as Cumm_CLRING_Type1Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.LONG_DESCRIPTION='Mode2'AND m.LONG_DESCRIPTION = 'Type2')then 1 else 0 end)) as Cumm_Mode2_Type2Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.LONG_DESCRIPTION='Mode3'AND m.LONG_DESCRIPTION = 'Type1')then 1 else 0 end)) as Cumm_TRSFER_Type1Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.LONG_DESCRIPTION='Mode3'AND m.LONG_DESCRIPTION = 'Type2')then 1 else 0 end)) as Cumm_Mode3_Type2Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.level_name='ALL_MODE' AND m.level_name = 'ALL_TYPE')then 1 else 0 end)) as Cumm_Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.long_description='Mode3' AND m.level_name = 'ALL_TYPE')then 1 else 0 end)) as Cumm_Mode3_Txn_Amount,
sum(cd.SALESAMT *(case when (k.LEVEL_NAME = 'ALL_product' AND l.long_description='Mode2' AND m.level_name = 'ALL_TYPE')then 1 else 0 end)) as Cumm_Mode2_Txn_Amount,
sum(cd.SALESAMT *(case when (k.long_description = 'product1' AND l.level_name='ALL_MODE' AND m.level_name = 'ALL_TYPE')then 1 else 0 end)) as Cumm_product1_Txn_Amount,
sum(cd.SALESAMT *(case when (k.long_description = 'product1' AND l.long_description='Mode1' AND m.LONG_DESCRIPTION = 'Type1')then 1 else 0 end)) as Cumm_product1Mode1Type1_Txn_Amount,
sum(cd.SALESAMT *(case when (k.long_description = 'product1' AND l.long_description='Mode1' AND m.LONG_DESCRIPTION = 'Type2')then 1 else 0 end)) as Cumm_product1_Mode1_Type2_Txn_Amount,
sum(cd.SALESAMT *(case when (k.long_description = 'product1' AND l.long_description='Mode1' AND m.level_name = 'ALL_TYPE')then 1 else 0 end)) as Cumm_product1_Mode1_Total_Txn_Amount
/* From dimension views and cube view */
FROM CUSTOMER_ID_CUSTOMER_ID_HIE_VIEW b,
TIME_TIME_HIER_VIEW j,
product_product_HIER_VIEW k,
MODE_MODE_HIER_VIEW l,
TYPE_TYPE_HIER_VIEW m,
CUBETEST_VIEW cd
/* Create level filters */
WHERE b.level_name = 'CUSTOMER_ID'
AND b.LONG_DESCRIPTION='xyz'
AND j.LEVEL_NAME='MONTH'
AND j.END_DATE between to_date('2007-10-31','YYYY-MM-DD') and to_date('2007-10-31','YYYY-MM-DD')
/* Join dimension views to cube view */
AND b.DIM_KEY=cd.ACCOUNT_ID
AND j.DIM_KEY=cd.TIME
AND k.DIM_KEY=cd.product
AND l.DIM_KEY=cd.MODE
AND m.DIM_KEY=cd.TYPE
ORDER BY j.end_date,
k.level_name,
l.level_name,
m.level_name;

Error on "CREATE MATERIALIZED VIEW"

I tried to create this materialized view:
CREATE MATERIALIZED VIEW mv_cost_est
BUILD IMMEDIATE
REFRESH complete
START WITH to_date(sysdate,'dd/mm/yyyy hh24:mi:ss')
NEXT sysdate + 60/86400
disable QUERY REWRITE
AS
SELECT
efm_contratti.contratto_id,
efm_commesse.dp_id,
x.wr_id,
(select max(cost_class_attiva) from efm_cost_cat_passivo_attivo
where x.cost_class_id = efm_cost_cat_passivo_attivo.cost_class_passiva
and x.cost_cat_id = efm_cost_cat_passivo_attivo.cost_cat_passiva
) AS classe_costo,
(select max(cost_cat_attiva) from efm_cost_cat_passivo_attivo
where x.cost_cat_id = efm_cost_cat_passivo_attivo.cost_cat_passiva
and x.cost_class_id = efm_cost_cat_passivo_attivo.cost_class_passiva) as cat_costo,
x.cost_est_total,
(SELECT CASE
WHEN status IN ('I','SA') and ( (TO_DATE(LAST_DAY(SYSDATE)) > wr.date_est_start) or wr.pct_complete > 0 ) THEN
(case
when wr.pct_complete > 0 then
(wr.cost_est_total * wr.pct_complete /100 * (1 + pct_ricarico/100))
when (wr.pct_complete = 0 and wr.date_est_end = wr.date_est_start and wr.date_est_end < TO_DATE(LAST_DAY(SYSDATE))) then
(wr.cost_est_total * (1 + pct_ricarico/100))
when (wr.pct_complete = 0 and wr.date_est_end > TO_DATE(LAST_DAY(SYSDATE)) ) then
(wr.cost_est_total * ((TO_DATE(LAST_DAY(SYSDATE)) - wr.date_est_start) / (wr.date_est_end - wr.date_est_start) ) * (1 + pct_ricarico/100))
when (wr.pct_complete = 0 and wr.date_est_end < TO_DATE(LAST_DAY(SYSDATE)) ) then
(wr.cost_est_total * (1 + pct_ricarico/100))
when (wr.pct_complete = 0 and wr.date_est_end = TO_DATE(LAST_DAY(SYSDATE))) then
(wr.cost_est_total * (1 + pct_ricarico/100))
END)
WHEN status = 'Com' THEN cost_est_total * (1 + pct_ricarico/100)
WHEN status = 'CON' THEN cost_total * (1 + pct_ricarico/100)
WHEN status = 'BEN' THEN cost_total * (1 + pct_ricarico/100)
else
0
end
from wr where wr.wr_id=x.wr_id) as IMPORTO1,
'EUR',
efm_commesse.ac_id,
project.project_id,
project.project_type,
x.status,
x.cost_est_total,
x.cost_total,
x.pct_complete,
(SELECT CASE
WHEN status IN ('I','SA') THEN
(case
when wr.pct_complete = 0 and wr.date_est_start = wr.date_est_end and wr.date_est_end < TO_DATE(LAST_DAY(SYSDATE)) then
100
when wr.pct_complete = 0 and wr.date_est_end > TO_DATE(LAST_DAY(SYSDATE)) then
round (((TO_DATE(LAST_DAY(SYSDATE)) - wr.date_est_start) / (wr.date_est_end - wr.date_est_start)*100), 2)
when wr.pct_complete = 0 and wr.date_est_end < TO_DATE(LAST_DAY(SYSDATE)) then
100
when wr.pct_complete = 0 and wr.date_est_end = TO_DATE(LAST_DAY(SYSDATE)) then
100
when wr.pct_complete > 0 then
wr.pct_complete
END)
WHEN status = 'Com' THEN 100
WHEN status = 'CON' THEN 100
WHEN status = 'BEN' THEN 100
else
0
end
from wr where wr.wr_id=x.wr_id) as SAL_CALCOLATO,
x.pct_ricarico,
x.commessa_id,
x.cost_class_id,
x.cost_cat_id
FROM
wr x, cf, efm_contratti, efm_commesse, project,wrbennonfattura
WHERE x.cf_id=cf.cf_id
AND x.commessa_id=efm_commesse.commessa_id
AND x.contratto_id=efm_contratti.contratto_id
AND x.project_id=project.project_id
AND efm_commesse.status not in ('Closed')
and x.wr_id=wrbennonfattura.wr_id
and project.project_type in ('03','10')
AND x.cost_class_id is not null
but I get this error:
ORA-22818: subquery expressions not allowed here
How can I rewrite my query to avoid this error?
Thanks in advance!

I'm sorry, the solution I gave above may not be correct. Try http://download.oracle.com/docs/cd/B19306_01/server.102/b14200.pdf - section 15-6. And the solution may be:
ORA-22818: subquery expressions not allowed here
Cause: An attempt was made to use a subquery expression where these are not supported.
Action: Rewrite the statement without the subquery expression.

ORA-04052 creating Materialized View

ORA-04052 creating Materialized View
Hi All !!
I'm trying to create a Materialized view and his query definition uses an active public database link. When I ran the script for creating the view I get the following message:
ERROR in line 1:
ORA-04052: error occurred when looking up remote object
USER.TABLE@ORCL2
ORA-00604: error occurred at recursive SQL level 1
ORA-03106: fatal two-task communication protocol error
ORA-02063: preceding line from ORCL2
But when I execute his definition query all is ok, the query works fine.
I mean, I'm using the following sentence to create the view:
CREATE MATERIALIZED VIEW my_view TABLESPACE tbsname BUILD IMMEDIATE
REFRESH FORCE
WITH ROWID
ENABLE QUERY REWRITE
AS
SELECT ...
FROM SCHEMA_NAME.TABLE_NAME@ORCL2;
The above sentence give me ORA-04052. Nevertheless the SELECT... FROM SCHEMA_NAME.TABLE_NAME@ORCL2; works fine...
I checked for the GLOBAL_NAMES parameter and it is set to FALSE. Please help me, How can I fix this problem ?
I'm using Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - Production running over Win XP for create the view.
The Database Link points to Oracle Database 10g Release 10.1.0.4.0 - 64bit Production running over Solaris
Thanks in advance !!

I've checked the NLS_LANG settings in both servers, and are set to AMERICAN. NLS TERRITORY are set to America also.

Create Materialized View hangs

Hi,
I have a query, which contains about 10 tables and returns about 40000 rows. When I execute the query itself it runs about 1minute.
I want to create a Materialized View for that query, but I had to stop it after some hours. There is no error message, it just doesn't stop.
Do you have any ideas what the problem could be or where I should start to look at?
Thank you very much for your help!
DROP MATERIALIZED VIEW A;
CREATE MATERIALIZED VIEW A
TABLESPACE A_T
PCTUSED    0
PCTFREE    10
INITRANS   2
MAXTRANS   255
STORAGE    (
            INITIAL          64K
            NEXT             1M
            MINEXTENTS       1
            MAXEXTENTS       UNLIMITED
            PCTINCREASE      0
            BUFFER_POOL      DEFAULT
NOCACHE
NOLOGGING
NOCOMPRESS
NOPARALLEL
BUILD IMMEDIATE
REFRESH COMPLETE ON DEMAND
WITH PRIMARY KEY
--ENABLE QUERY REWRITE
AS
SELECT...

890408 wrote:
It returns all rows after 1 minute. I don't have any DB links btw. and I am using oracle 11g.
We had the same problem with another oracle installation (10g) with another query.
When I watch the session in my TOAD Session Browser I see the event "asynch descriptor resize" in wait, could this be a hint?
Or can I enable somehow tracing to find out why the mat view creation never ends?tracing is enabled by below
DBMS_SESSION.SESSION_TRACE_ENABLE(TRUE,TRUE,'ALL_EXECUTIONS');

Error creating Materialized Views

We are trying to create a materialized view between Oracle instances, one running 10.1.0.4 on Solaris, and one running 10.1.0.2 on Windows 2000 Svr.
A link was established, and we can run select statements
select count(*) from accounts@capsprd1
however we get an error when trying to create the materialized view. See the following.
SQL> create materialized view ACCOUNTS
2 tablespace capstrac2
3 nocache
4 logging
5 noparallel
6 build immediate
7 refresh complete
8 NEXT TRUNC(SYSDATE) + 1 + 6/24
9 AS
10 SELECT * FROM ACCOUNTS@CAPSPRD1
11 /
create materialized view ACCOUNTS
ERROR at line 1:
ORA-04052: error occurred when looking up remote object
[email protected]
ORA-00604: error occurred at recursive SQL level 1
ORA-03106: fatal two-task communication protocol error
ORA-02063: preceding line from CAPSPRD1
Any help would be greatly appreciated.
Thanks

Thanks for the feedback.
We are actually performing a complete refresh, not a fast refresh, so I did not think we needed to create MV logs on the master.
I did grant Create Materialized View to the schema, however I still receive the same issue. One thing I noticed in the error is it is automatically appending .WORLD on to the remote database. A domain is not used on the remote side (Solaris), and I thought I had configured the 'data warehouse' side (Windows) to not use a domain.
ORA-04052: error occurred when looking up remote object
[email protected]
Can anyone tell me why .WORLD is being appended?
Thanks for the help.

Illegal use of LONG datatype error message when i create materialized view

Hello to all
I want create read only materialized view replication environment two of our tables have LONG datatype when i create materialized view against on them
I recieve this error message
CREATE MATERIALIZED VIEW MDB.TOAD_PLAN_TABLE TABLESPACE aramis REFRESH FORCE WITH ROWID AS SELECT * FROM MDB.TOAD_PLAN_TABLE@arahisto
Error report:
SQL Error: ORA-00997: illegal use of LONG datatype
00997. 00000 - "illegal use of LONG datatype"
Do you know any resort solution for it?
thanks

You can not use longs in materialized views over a database link, you can however take a part of a long over to a materialized view.
I have gotten this to work in the past l had to create a PL/SQL function that you can use to extract the character data from the long column and use that to
as part of the function you will need to pass in the columns of the table that will identify the unique records so you can pick out the long column
example function
-- you will need to make sure this funtion is in the remote location as you can not select longs accross a DB LINK.
CREATE OR REPLACE FUNCTION MDB.TOAD_PLAN_LONG_CONV
(pass in the primary key columns for the table)
RETURN VARCHAR2
IS
v_long VARCHAR2(32767) ;
BEGIN
BEGIN
-- need to select the long column into the PL/SQL variable
SELECT long_column
INTO v_long
FROM MDB.TOAD_PLAN_TABLE
WHERE key_columns = passed columns ;
EXCEPTION
WHEN OTHERS THEN
IF SQLCODE = '-01406' THEN
NULL ;
ELSE
RAISE ;
END IF ;
END ;
RETURN SUBSTR(v_long,1,4000) ;
END ;
Then when you create the materialized view utilize that function on the long column.
create or replace materialized view MDB.TOAD_PLAN_TABLE TABLESPACE aramis REFRESH FORCE WITH ROWID
AS
SELECT column1, .... columnx,
MDB.TOAD_PLAN_LONG_CONV@arahisto (primary key column list) as long_column_name
FROM MDB.TOAD_PLAN_TABLE@arahisto ;
See if this will work for you? Keep in mind however this solution will not get the entire long column only as much as a PL/SQL variable will hold of it.
Mike

End of Communications Channel

Hi,
I face a problem here when I create a database. When I run the scripts to create a database, it gives the message end-of-communication channel. Just bear in mind that there is space in the location for the database. Some details are as follow:
There is a HP server.
The database is created in the nfs which is not the local directory.
Please advice ...
Regards,
- Tassy -

Hi,
I got a problem quite like urs on HP too.
It was cause of the max OS process was reached. U have to modify a kernel variable. Dont remember exactly the name but it's something like nb_proc.
Hope it helps,
Fred

Orphan sessions - end of communication channel

Dear Colleagues,
We are facing with a server crash or are forced to shutdown and restart the db server on monthly basis approx. and we believe that this problem is related to orphan sessions created by users connected through application servers (remote desktop connection - RDC) and when our off-site link drops these sessions exists on the db and when the connection re-establishes new connections are formed and this kept on going untill a crash occurs or we are forced to shutdown the db - which also ends in a crash after giving a message 'End of communication channel' - to control the extra sessions from being created we tried setting the retention time of a connection to 5 minutes but this seems to be adding on to the problem as well. Before proceeding any further let me apprise you on our environment:
Windows 2000 Advanced server running on ML-570 dual processor
Oracle 9.0.1.1.1
DB Users: 350-300 approx. concurrent sessions
Front end application s/w are developed in VB 6 and are deployed on "Unisys ES 7000 Orion 230" on 3-4 partitions each of 4-6 processors - These is used as our application servers.
We believe this started roughly after we gave access to our off-site offices because we have 1 GB LAN access at the main site and the users are given thin clients (HP thin clients) and this problem existed nevertheless, restart of db server once in a while - which is something every windows user does and we all know.
Can any body please tell us is this a orphan session problem and its remedy? or its something else - do we need an application server to manage the transactions or any thing which can help in the resolution of the problem.
You help is appreciated as always.
Take care.
QJ

Try tracing the drop user statement. Then you'll see exactly what's happening very near the point where the socket is closed. Repeating the test with varying input parameters--I know there are many of them and that's precisely the point--for a few iterations will produce enough trace data that you'll be better equipped to decide on a reasonable course of action.
alter session set events '10046 trace name context forever, level 12';
drop user hard_to_kill;
The resulting trace data will tell you if you have to go so far as admin level sql net tracing.

ORA-03113 END OF COMMUNICATION CHANNEL

Iam trying to install 0racle 8.1.7 on an NT server machine with SP6a.During the installation while the database is created I get the following error:
ORA0-03113 end of communication channel.
I have performed the installation (after unistalling, cleaning the registry ) 3 times and even have taken the machine off the network, but the same error occurs.
I have installed 8.1.7 on another machine and never had this problem.
Any ideas what is happenning?
Thanks in advance

ORA-03113: end-of-file on communication channel
I saw this when running the "Database Configuration Assistant" and "sqlplus". When the "Database Configuration Assistant" gave me this error during Oracle 9i (9.2.0) installation on Red Hat 2.1 AS, I simply removed the shared memory segments owned
by the Oracle user and I restarted the "Database Configuration Assistant". I'm not sure if this is the right way but it always worked for me. Here is what I did to get the "Database Configuration Assistant" running again:
I executed the ipcs command to get the address of the shared memory segments that have been allocated by Oracle:
# ipcs
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
0x00000000 0 root 600 196608 2
0x00000001 32769 root 600 655360 2
0x00000000 458755 oracle 660 4194304 0
0x00000000 491524 oracle 660 33554432 0
0x00000000 524293 oracle 660 33554432 0
0x00000000 557062 oracle 660 33554432 0
0x00000000 589831 oracle 660 33554432 0
0x00000000 622600 oracle 660 33554432 0
0x00000000 655369 oracle 660 33554432 0
0x00000000 688138 oracle 660 33554432 0
0x3ecee0b0 720907 oracle 660 4194304 0
------ Semaphore Arrays --------
key semid owner perms nsems status
------ Message Queues --------
key msqid owner perms used-bytes messages
Then I removed all shared memory segments that were owned by the Oracle user during the installation with the following command:
# ipcrm shm 458755 491524 524293 557062 589831 622600 655369 688138 720907
After that I restarted the "Database Configuration Assistant". Once the installation was done I immediately restarted the DB as well.
Caveat: I'm not sure if this procedure can cause any other problems if it's done during the installation.
But if you get this problem in connection with sqlplus, then simply make sure that the database is down and exit sqlplus. After that, follow the procedure above by removing all shared memory segments that belong to the Oracle user. To my knowledge,
this should not cause any problems.

End of communication channel error on second execution

a select view over a database link will return results once but on second execution returns end of communication channel error.
i have lots of other views working fine this way. the problem view did work but has started failing. .
running the view on the database which is running the htmldb application in a sqlplus session (which is the same schema which htmldb is using for the application) works fine. it is only htmldb which is showing the problem both from within the application and the sql workshop

Hi,
For a 'serious' error like that you will probably want to work with Oracle support who will be able to work with you to resolve the problem.

Creating Materialized View in Toad

As with every new endeavor - come new questions.
I am trying to create a materialized view via toad (first time doing this). Now - toad is great, since it provides a kind-of wizard interface. Hence, one doesn't have to completely code in the create statement, with all of the options, etc.
Instead, in toad, one can (via the schema browser), go into the Materialized Views tab and click on create new. This opens a window with 6 tabs: Basic Info, Refresh Info, Physical Attributes, Query, Partitions & Subpartition Template.
In the Basic Info, one can put a check mark next to some of the following options:
-Build Deffered
-Parallel
-Cache
-Logging
-Using index
-Allow updates
etc.
I have read that build deferred refers to whether or not you would like the view to be created automatically or to be deferred.
Anyways, I tried to find Toad documentation to explain each of the options in-detail. No success. Hence, am researching each part piece by piece.
But - here is my question:
In the Query tab, we are asked to specify a query. I am assuming that the query does not have to be a full query, beginning with CREATE MATERIALIZED VIEW mv_table1 REFRESH FAST etc...
Since in this 'wizard', we are providing the MV name at the top of the dialog box, we are checking the 'options' in the other tabs, etc.
And so, I assumed that the query should merely be a select query in the window mentioned above.
So I entered the following:
select * from table1@remote_db;
When I go to verify the syntax, I get the error message: ORA_00911: invalid character. It seems to be pointing to my db_link (remote_db). I have been using this link throughout many places, w/o any problems.
Has anyone created a MV in toad before? Any links to good toad documentation would be helpful as well.
Thanks.

(This is fun... ;))
For anyone endeavoring this in the future, below I have attached the prerequisites required in order to create a materialized view (can also be found @ http://download-uk.oracle.com/docs/cd/B14117_01/server.101/b10759/statements_6002.htm):
Prerequisites
The privileges required to create a materialized view should be granted directly rather than through a role.
To create a materialized view in your own schema:
You must have been granted the CREATE MATERIALIZED VIEW system privilege and either the CREATE TABLE or CREATE ANY TABLE system privilege.
You must also have access to any master tables of the materialized view that you do not own, either through a SELECT object privilege on each of the tables or through the SELECT ANY TABLE system privilege.
To create a materialized view in another user's schema:
You must have the CREATE ANY MATERIALIZED VIEW system privilege.
The owner of the materialized view must have the CREATE TABLE system privilege. The owner must also have access to any master tables of the materialized view that the schema owner does not own (for example, if the master tables are on a remote database) and to any materialized view logs defined on those master tables, either through a SELECT object privilege on each of the tables or through the SELECT ANY TABLE system privilege.
To create a refresh-on-commit materialized view (ON COMMIT REFRESH clause), in addition to the preceding privileges, you must have the ON COMMIT REFRESH object privilege on any master tables that you do not own or you must have the ON COMMIT REFRESH system privilege.
To create the materialized view with query rewrite enabled, in addition to the preceding privileges:
If the schema owner does not own the master tables, then the schema owner must have the GLOBAL QUERY REWRITE privilege or the QUERY REWRITE object privilege on each table outside the schema.
If you are defining the materialized view on a prebuilt container (ON PREBUILT TABLE clause), then you must have the SELECT privilege WITH GRANT OPTION on the container table.
The user whose schema contains the materialized view must have sufficient quota in the target tablespace to store the master table and index of the materialized view or must have the UNLIMITED TABLESPACE system privilege.
When you create a materialized view, Oracle Database creates one internal table and at least one index, and may create one view, all in the schema of the materialized view. Oracle Database uses these objects to maintain the materialized view data. You must have the privileges necessary to create these objects.

End of communication channel on creating Materialized view

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