Casting varchar to bytea

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От Dylan Milks
Тема Casting varchar to bytea
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Msg-id 84D4D76946AC2F43AA9BDCD860DC667518C18D@voyager.greenridge-int.ca
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Ответы Re: Casting varchar to bytea  (Ian Barwick <barwick@gmx.net>)
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Hi. Could someone please tell me how to convert a "varchar" to a "bytea" datatype.

I have a column which contains a number stored as a varchar. I have another column of type bytea. I'm trying to insert
thevalue of the varchar column in the bytea column, but the conversion won't work. 

Something like the following:

update webuser set ccnum = ccnumstring::bytea where userid=userid;

Any ideas how to do this?

Also, I have the PGCRYPTO module and I can't get the AES algorithm to decrypt properly. It will encrypt, but not
decrypt.However, I can get the BLOWFISH algorithm to work in both directions. Can someone please give me an example of
decryptingusing the AES algorithm? 

Thanks in advance.

Dylan

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