[racket] Pulling BLOB from SQL DB

From: Ryan Culpepper (ryan at cs.utah.edu)
Date: Fri Apr 13 12:08:20 EDT 2012

On 04/12/2012 01:02 PM, J G Cho wrote:
> While reading a BLOB from MySQL, DrRacket (5.2.1 on Win7) crashes
> every time. (SQL was like 'select blobcol from table LIMIT 1')
> Ran the same code via command line on Ubuntu. Racket seems to run out
> of memory due to the size of BLOB.

How big was the blob? I have have some fixes pending for blobs that 
don't fit within a single MySQL "packet", but that limit is pretty low.

> Questions:
> How can I give more memory to /usr/local/bin/racket?

Just the standard "ulimit" command.

> Or more importantly,
> Is there a way to pipe PORTs (in from MySQL and out to file) such that
> Racket can handle 'very large' BLOBs?

No, that's not possible. But you can try retrieving the blob in separate 
chunks (eg use the SUBSTR function with varying offsets).


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