RE: 10046 trace.. bind question

From: Ric Van Dyke <ric.van.dyke_at_hotsos.com>
Date: Sun, 24 Aug 2008 10:22:53 -0500
Message-ID: <C970F08BBE1E164AA8063E01502A71CF0110459C@WIN02.hotsos.com>

Roger that on the nvarchr2 or varchar2, like you I have seen the "n" data types don't get a value printed in the trace so I figured that the data is being interpreted as a varchar2 not an nvarchar2.

It would be interesting to see the SQL, the explain plan and the stat lines of the SQL being run, it may well be that a data type conversion is taking place, although it seems odd since Oracle by default always converts the SRTING type (varchar2 in this case) to a NUMBER and not a NUMBER to a STRING. So I don't think this is an implicit conversion. But with out the code we are guessing.

• Ric

-----Original Message-----
From: freek D'Hooge [mailto:freek.dhooge_at_uptime.be] Sent: Sunday, August 24, 2008 6:25 AM
To: Ric Van Dyke; contactarul_at_gmail.com; oracle-l_at_freelists.org Subject: RE: 10046 trace.. bind question

Hi,

oacdty=01 could mean varchar2 or nvarchar2. There is a huge difference between the two as if a bind value is passed as a nvarchar2 and the column datatype is a varchar2 then a implicit conversion is done, meaning that an index will not be used.

I have found that (at least on 9i) in case of a nvarchar2 datatype the bind value was not shown in the trace file (but the value length was).

Regards,
 
Freek D'Hooge
Uptime
Oracle Database Administrator
email: freek.dhooge_at_uptime.be
tel +32(0)3 451 23 82
http://www.uptime.be
disclaimer

---

From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Ric Van Dyke
Sent: zondag 24 augustus 2008 3:24
To: contactarul_at_gmail.com; oracle-l_at_freelists.org Subject: RE: 10046 trace.. bind question

Yes a 1 is a varchar2 data type.  You can see these data types in the:

Oracle® Call Interface Programmer's Guide, 10g Release 2 (10.2)
Part Number B14250-02

Chapter 3, Data Types, table 3-1.

What ever program is sending that in is not sending it as a number.

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Received on Sun Aug 24 2008 - 10:22:53 CDT