>From a pure performance direction,
pls_integer or binary_integer is probably
the fastest.
If you declare a variable to be of
table_name.column_name%type
there are implicit constraints on the
variable and any pl/sql assignments
(in particular arithmetic operations)
have to check that the result matches
those constraints. At one time I believe
this meant using a temporary variable
to hold a result, then copying the result
if the constraint was matched.
Having said that, you could try a few simple
tests to find out that the differences (in
new releases) are incredibly small.
Jonathan Lewis
Host to The Co-Operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/faq/ind_faq.html
Author of:
Practical Oracle 8i: Building Efficient Databases
See http://www.jlcomp.demon.co.uk/book_rev.html
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-----Original Message-----
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
Date: 27 August 2001 17:13
|Dear gurus !
|What is better performance-wise - to declare a variable inside a
pl/sql
|block (or a trigger) as integer (number , Pls_integer etc..) or as
|mytable.mycolumn%TYPE .
|Again , i'm concerned ONLY about performance in this question.
|
|Thanks a lot.
|
|DBAndrey
|
|* 03-9254520
|* 053-464562
|* mailto:[EMAIL PROTECTED]
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