Materialized view on table having LONG data type column
Hi ,
We have two Database with different version as below.
Master Database site : 9.2.0.8.0
Materialized view site : 10.2.0.1
We want to create MV ( materialized view) for below table in Materialized view site.
SQL> desc longdescription;
Name Null? Type
LDKEY NOT NULL NUMBER
LDOWNERTABLE NOT NULL VARCHAR2(18)
LDOWNERCOL NOT NULL VARCHAR2(18)
LDTEXT LONG
ROWSTAMP NOT NULL VARCHAR2(40)
SQL>
Here's the error that we got.
SQL> create materialized view MV_LONGDESCRIPTION REFRESH ON DEMAND with rowid as
select * from LONGDESCRIPTION@CBUM_REPL;
create materialized view MV_LONGDESCRIPTION REFRESH ON DEMAND with rowid as sele
ct * from LONGDESCRIPTION@CBUM_REPL
ERROR at line 1:
ORA-00997: illegal use of LONG datatype
SQL>
CBUM_REPL - > is dblink which connections to remote oracle 9i database where we have MV log created for table LONGDESCRIPTION
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:349809082244#25744259997345
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thanks and regards
srinivas1. Export and import
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--Jagriti
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Hi,
I'm using a view object that uses Oracle LONG data type.The following exception is thrown
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I have solved this problem using the solution suggested by this blog [AskTom-Link|http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:839298816582]
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v_date VARCHAR2(13) ;
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DBMS_DATAPUMP.START_JOB(v_dp_job_handle) ;
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v_job_state := 'UNDEFINED' ;
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LOOP
DBMS_DATAPUMP.GET_STATUS(
v_dp_job_handle,
DBMS_DATAPUMP.KU$_STATUS_JOB_ERROR + DBMS_DATAPUMP.KU$_STATUS_JOB_STATUS + DBMS_DATAPUMP.KU$_STATUS_WIP,
-1,
v_job_state,
v_status) ;
v_job_status := v_status.JOB_STATUS ;
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v_percent_done := v_job_status.PERCENT_DONE ;
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v_message := v_status.WIP ;
ELSIF BITAND(v_status.mask, DBMS_DATAPUMP.KU$_STATUS_JOB_ERROR) != 0 THEN
v_message := v_status.ERROR ;
ELSE
v_message := NULL ;
END IF ;
IF v_message IS NOT NULL THEN
v_count := v_message.FIRST ;
WHILE v_count IS NOT NULL
LOOP
DBMS_OUTPUT.PUT_LINE(v_message(v_count).LOGTEXT) ;
v_count := v_message.NEXT(v_count) ;
END LOOP ;
END IF ;
END LOOP ;
DBMS_OUTPUT.PUT_LINE('Job has completed') ;
DBMS_OUTPUT.PUT_LINE('Final job state = '||v_job_state) ;
DBMS_DATAPUMP.DETACH(v_dp_job_handle) ;
END ;But the application we have that uses the database cannot be changed to read from a CLOBWhy can't you change the application?
Well, anyway you should point out to your superiors that Oracle documented years ago to not use LONGS anymore...
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/datatype.htm#sthref3806
It clearly states:
LONG Datatype
Note:
Do not create tables with LONG columns. Use LOB columns (CLOB, NCLOB) instead. LONG columns are supported only for backward compatibility.
Oracle also recommends that you convert existing LONG columns to LOB columns. LOB columns are subject to far fewer restrictions than LONG columns. Further, LOB functionality is enhanced in every release, whereas LONG functionality has been static for several releases.
How do I go from CLOB to LONG?I'm sorry, cannot help you on that one, I don't think you can do that at all (Oracle wants us to stop using LONGS, so, it's a one-way conversion...):
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1037232794454#15512131314505
So: NO built_in, you'll need to write a program if the clob is ALWAYS LESS THAN 32k in size, you can use plsql..but is that the case in your case? Only you know that.
I believe that question is still unanswered on this forum, but you might try searchin for answers on this forum, and
the 'Database-General' forum: General Database Discussions
Perhaps you can google a Q&D workaround...
( And consider convincing your collegues to just convert your LONGS to LOBS)
Edited by: hoek on Apr 8, 2009 5:43 PM -
LONG data types producing errors in 10.1.2.48.18
Maybe I should already know this but...
I am getting the " Internal Error has occured " message when I attempt to add a field which is defined as a LONG data type. Can Discoverer handle these fields ? If so is there a setting I am suppose to change ?
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OBXI know the BLOB problem has come up before as no, I don't think Discoverer will handle them directly (ie: there are example using pl/sql to handle the BLOB first).
However, I did try just pointing to the eul4_documents table where there is a BLOB (the actual workbook apparently). When I created the folder pointing to that Oracle table I did not get an error in Discoverer Admin.
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TIPS(63) : LONG DATA TYPE의 LENGTH 구하기
제품 : PL/SQL
작성날짜 : 1999-04-15
TIPS(63) : LONG DATA TYPE의 LENGTH 구하기
=========================================
PURPOSE
다음은 function 을 적용할 수 없는 long data type 의 length 를
구하는 방법을 소개한다.
Explanation
Long DataType 에 대해 Length 를 구하려 하는 경우 다음과 같은 Error 가 발생한다.
SQL> create table TOY
2 (Toy_ID NUMBER, Description LONG);
Table created.
SQL> select LENGTH(Description) from TOY;
select LENGTH(Description) from TOY
ERROR at line 1:
ORA-00932: inconsistent datatypes
"Inconsistent DataTypes" Error 는 LONG DataType 으로 정의된 Column 에
Function 을 적용하였기 때문에 발생한다.
VARCHAR2 Type 을 사용하면 정상 처리할 수 있으나, Oracle7 에서는 VARCHAR2 는
2,000 Characters 만 저장할 수 있으며, Oracle8 에서는 4,000 Characters 이다.
Oracle8 에서는 Long Data 를 저장하기 위해 LOB DataType 을 사용할 수 있으며,
LONG Data Type 은 Oracle7/Oracle8 모두 Support 되므로 LONG Type 에 대해
Length 를 확인하는 방법을 알아본다.
Example
다음은 anonymous PL/SQL Block 을 통해 TOY Table 에서 LONG Column 의
Length 를 구하는 Script 이다.
1. Single Record 에 대한 예
$ vi len_long.sql
declare
length_var NUMBER;
cursor TOY_CURSOR is
select * from TO;
toy_val TOY_CURSOR%ROWTYPE;
begin
open TOY_CURSOR;
fetch TOY_CURSOR into toy_val;
length_var := LENGTH(toy_val.Description);
DBMS_OUTPUT.PUT_LINE('Length of Description: '||length_var);
close TOY_CURSOR;
end;
SQL> set serveroutput on
SQL> @len_long
Length of description : 21
PL/SQL procedure successfully completed.
2. Multiple Record 에 대해서는 cursor FOR Loop 를 사용한다.
$ vi len_long.sql
declare
length_var NUMBER;
cursor TOY_CURSOR is
select * from TOY;
toy_val TOY_CURSOR%ROWTYPE;
begin
for toy_val in TOY_CURSOR loop
length_var := LENGTH(toy_val.Description);
DBMS_OUTPUT.PUT_LINE('ID: '||toy_val.Toy_ID);
DBMS_OUTPUT.PUT_LINE('Length of Description: '||length_var);
end loop;
end;
SQL> set serveroutput on
SQL> @len_long
ID: 1
Length of Description: 21
ID: 2
Length of Description: 27
PL/SQL procedure successfully completed.
Reference Document
------------------Hi Frank,
I have the exact same scenario where I have huge data coming from DB and its a must that I provide pagination.
I tried implementing as per the document but the pagination is not working for me too.
Details of the scenario:
1. I have a session facade method which takes a searchCriteria (custom criteria) as the input parameter and returns a list of entities.
a)This is the first method that I call as a default method activity in my taskflow.
b)The result of this method is dragged and dropped as table in the jsff. (*which created a methodIterator in pageDef unlike the documentation which has accessorIterator*).
2. I declared 2 class level variables
a) List<Entity> result: which is set once the method in the (1) above is executed.
b) long size: which is also set from the method (1) above.
3. I defined getEntityAll(int index,int range) method which returns List<Entity> as per the index and range using the result (class level variable populated by method in 1)
4. I defined getEntityAllSize() method which returns the size (class level variable populated by method in 1).
5. I created the datacontrol on top of the session facade bean.
6. I made sure to change the DataControlHandler = "oracle.adf.model.adapter.bean.DataFilterHandler"
7. I've set the rangeSize = 25 in my pagedef.
Now when I run my page, my default method activity calls the method in (1) above and populates the table, with a scroll bar.
Once I start scrolling, it calls my method in (1) but it does not call either of the methods (getEntityAll(int index,int range) & getEntityAllSize()) which adds the pagination behavior.
After this, my table has just 25 rows and further scrolling does not invoke any of the methods from the session bean.
I'm using jdev : JDEVADF_11.1.1.4.0_GENERIC_101227.1736.5923 (11.1.1.4.0).
Please let me know if I am missing anything.
Thanks in advance!
Swapna
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