Re: How to Read Blob descriptor

rory@crosslink.net wrote: > > Can anyone give me some help reading the actual blob descriptors > for a BYTE column? I'm working with Informix 7.11 using Storage Manager > 2.1 for optical support. > > I want to be able to read the 56 byte blob descriptor, and possibly > modify the size field. Any help would be greatly appreciated. > > Rory Martin > rory@ruralcitizen.com I'm not sure how you could just modify the blob descriptor, but its description is in blob.h in $INFORMIXDIR/incl/esql. To just read the descriptor for a blob and not pull back the blob I belive you can use the DESCR(column_name) in your select statement. You might want to checkout the ESQL/C programers guide (version 7.1) and look at pages 7-20 through 7-40 or so. It is a pretty good section on blobs and I think it has a sample of using DESCR. Jacques -- ******************************************************************** * Jacques P. Renaut "I'd dazzle you with brilliance * * Informix Advanced Support if I only had the knack..." * * email: jrenaut@informix.com #include <disclamier.h> * ********************************************************************