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how do i concatenate two fields of "image" datatype

Posted on 2003-11-04
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hi! we have sybase (ASE/11.9.2.5 set on NT4).i have a stored proc where i am retrieving two sets of values from a table and inserting into a temp table. both the values and the destination field are of datatype "image". based on certain conditions, i need to concatenate the two values and populate the destination field. when i try to concatenate, i get an error "the once aggregate operation cannot take a image datatype as an argument". can someone advise how i can concatenate / update fields with "image"?

thx in advance
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Question by:nsujesh
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namasi_navaretnam earned 400 total points
ID: 9689817
You cannot issue distinct or group by statements on image datatypes.
You will need to use writetext function to deal with image datatype.

See example,

http://sybooks.sybase.com/onlinebooks/group-as/asg1251e/sqlug/@ebt-link;pt=28254?target=%25N%15_28709_START_RESTART_N%25;__prev_hit__=28314;__next_hit__=28756;DwebQuery=writetext

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by:bret
ID: 9704526
Sort of saying the same thing in a different way:

You can't do that in a stored procedure.  If you want to manipulate IMAGE data, your best option is probably to write a simple open client application that can read in the two IMAGE values, concatentate them in a buffer on the client side, then insert the resulting value using writetext.
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by:namasi_navaretnam
ID: 9704877
Bret,

I think writetext can be used with stored procedure. Need to get text pointer and then loop thru to insert.
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by:namasi_navaretnam
ID: 9704881
There are some examples in the link that I specified above.
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by:mansoor_a_khan
ID: 9722209
you can't concatenate image data type, however as BRET suggested you can use WRITETEXT


Cheers,
Mak
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