RE: Bind values missing from SQL trace

Morning Rich,

>> My only evidence is that trying to duplicate the statement 
>> using nulls or blanks for those variables returns no rows, 
>> where the app clearly does.  

This is a giveaway :

 bind 0: dty=1 mxl=128(50) mal=00 scl=00 pre=00 oacflg=03 oacfl2=800010
size=160 offset=0
   bfp=11058efc0 bln=128 avl=50 flg=05
   value=""

The MXL=128(50) says max length is 128 current length is 50. Also, the
AVL=50 confirms that the actual length of the bind data is indeed 50.

So, you are passing a 50 character value over. If, as others have
suggested, you were passing NULL then AVL would be zero. The number in
parenthesis after the MXL is 'random' in that instance - cannot be
trusted.

Jonathan has an example showing this very thing :

http://jonathanlewis.wordpress.com/2007/07/29/nls/

And I quote :

"on a hunch I generated two traces, one when using nvarchar2 as datatype
for the bind variable and one using varchar2 as datatype. And indeed,
the one where I used the nvarchar2 datatype was showing the full table
scan and lacked the values for the bind variables in the trace files,
while the one with the varchar2 datatype was using the index and had the
bind values filled in."

So, it could be that the use of 'N' data types precludes their use in
the trace file - maybe because they wouldn't show up correctly in the
trace file perhaps if they were in some 'exotic' character set?


Cheers,
Norm.

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