Alternative for varchar2 because limitaion?

Hello
I developed a screen used to view a SQL to forms and export the result in excel.
In this module, I send you just the sql-based report selection in a list box. The selection list became too long. I intend to generate the list based on user-level permissions. To do this, I have to store the SQL code in a table as different lines. It seems to be a limitation of varchar2 (4000) for the SQL storage. Is there an alternative? Is it possible using the BLOB data type? If so, how to store and retrieve data in BLOB data type?

Iqbal

Hi Kültepe,
As Philippe said, you can use the DBMS_LOB package to store long data in the CLOB.

I tried a small example, I think it can help you.



Create a table lob_contain

(ID NUMBER,

lob_col CLOB default empty_clob());

Creating a block to write to the LOB



Declare
lob_locator CLOB;
text varchar2(200) := 'Resume NAme - G.Subramanian KAushik City - Chennai

Location - triplicane Occupation - Software engineer Hobbies - Reading astrology

books,nemerology, Playing video games';
amount number;
offset integer;
Begin
-- Setting the amount to be written

amount := length(text);
-- Lock the record in the table lob_contain to get a expicit lock over the record

Select lob_ptr into lob_locator from lob_contain where id = 1 FOR UPDATE;
--Setting the Offset

offset := DBMS_LOB.GETLENGTH(lob_locator)+2;
--Write the text to the CLOB table

DBMS_LOB.WRITE(lob_locator,amount,offset,text);

COMMIT;

END;

You can read the data entered into a similar to a VARCHAR2 column CLOB

----------
Mark it with goodness, if this can help thank you :-)

Published by: Patrice Kaushik Subramanian on May 6, 2009 18:28

Tags: Oracle Development

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