LOBs and how to retrieve the record inserted with EMPTY_BLOb()
Hi guysHow to retrieve the records inserted with EMPTY_BLOb() instead of NULL value.
Best greetings
A.G.
There must be a better way, but these work:
SELECT... from tableX where length (lob_column) = 0;
SELECT... from tableX where dbms_lob.getlength (lob_column) = 0;
Concerning
Jonathan Lewis
http://jonathanlewis.WordPress.com
http://www.jlcomp.demon.co.UK
"All experts it is a equal and opposite expert."
Clarke
Tags: Database
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Hello
Thanks for posting the instructions CREATE TABLE.
Don't forget to display instructions INSERT for you samples, a few calls to the procedure (with specific values for the arguments) and content of t_term after each call.
What t_users role in this problem? You get all the information to t_users; you already know the user_id to the time wherever you call the procedure. I guess the only reason why you have to t_users to this problem is to guard against inserting a user_id not valid in t_term. (The foreign key constraint would guard against that, too, but it would trigger an error. You might find a little more elegant to just merge 0 line when an invalid user_id is passed to the procedure.)
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p_term_eff_date IN DATE
)
is
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a_l'_aide_de)
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of t_users
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) src
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where DECODE (TERM_EFF_DATE - if wanted
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0
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values (term_id_seq. NEXTVAL, src.user_id, p_term_eff_date);
end;
/
DISPLAY ERRORS
Because t_terms.id is forced to be NON NULL, you must provide a value for the id before you can insert a new line in t_terms. In the above procedure, I guess you have a sequence called term_id_seq for this purpose.
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