Re: Bytea question

["Chris Hoover" <revoohc@xxxxxxxxx>]

What I am needing to do is to store a file I receive, say file1.dat.  I want to store file1.dat into a bytea field so we can always go back and retrieve the original file to verify if needed.  However, I also need to process the data that is in 
file1.dat (1234 johnny 1254.12).  When I load file1.dat into the bytea field, I just have a large escaped record that represents the file.  What I am hoping is possible is to have postgres look into file1.dat's byte a field and be able to read the data in 
file1.dat (assuming it's a simple text file).  That way, the database can do all of the heavy lifting and loading.

so.

Insert file1.dat into a bytea field of table a.
Table a's insert trigger fires, and postgres looks at the bytea field and see's 
file1.dat and its contents of "1234 johnny 1254.12".  
Trigger runs logic on data and loads into appropriate tables

I hope this makes sense.

Chris

On 4/11/07, Chris Hoover <revoohc@xxxxxxxxx> wrote:

No, I need to store the entire file as received into the database.

Chris

On 4/11/07, Alvaro Herrera < alvherre@xxxxxxxxxxxxxxxxx> wrote:

Chris Hoover escribió:
> Hopefully a quick question.
>
> If I store a file into a bytea field, is there anyway for postgres to read
> the contents of the file?

When you say "store a file", do you mean "store a filename"?

> Here is my scenario:
>
> Receive text file
> insert file into bytea field
> insert trigger fires
>  - read file contents
>  - post contents into production tables
>
> Is this at all possible, or am I going to need to store the original file
> and store/pass the file contents?


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Alvaro Herrera                                http://www.CommandPrompt.com/
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