Re: Convert HEX to RAW in SQL*Loader

From: Jared Still <>
Date: Thu, 19 Feb 2009 10:15:07 -0800
Message-ID: <>

On Thu, Feb 12, 2009 at 9:43 AM, Stuart Blackburn <>wrote:

> Has anyone ever successfully converted from a HEX string to a BLOB in
> SQL*Loader? My data file contains long HEX strings which represent a .JPG
> file and I need this to be loaded into a table containing a BLOB column.
> If my control file contains the following line it loads the HEX string as
> text which is incorrect:
> C1 POSITION(1) varrawc(6,100000)
> If my control file contains the following line I receive a "SQL*Loader-309:
> No SQL string allowed as part of C1 field specification" error
> C1 POSITION(1) varrawc(6,100000) "HEXTORAW(:C1)"

There is one useful reference to this in MetaLink:,p27_show_header,p27_show_help:288603.999,1,1

   "SQL functions are not supported against LOB columns with SQL*Loader"

I can't find that statement in the docs, but I didn't spend a lot of time reading them.

A workaround for this is to create the column as LONG or LONG RAW, whichever is appropriate, and then load the data.

ALTER TABLE can be used to convert to a LOB

    alter table blob_test modify( clob_column clob);

If this data is being loaded into an existing table with data in it, you will need a staging table.

I just tested this on a 10.2 database and the process works.

Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist

Received on Thu Feb 19 2009 - 12:15:07 CST

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