Re: Convert bytea to Float8

[Lee Keel <lee.keel@xxxxxxx>]

Title: Convert bytea to Float8

I am sorry to push this issue, but I have clients waiting on a solution for this.  So, does the lack of response mean that I am going to have to find another approach?  Or can this conversion be done in ppgsql\perl?

 

Thanks in advance,

Lee Keel

 

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From: pgsql-general-owner@xxxxxxxxxxxxxx [mailto:pgsql-general-owner@xxxxxxxxxxxxxx] On Behalf Of Lee Keel
Sent: Monday, October 15, 2007 8:33 AM
To: pgsql-general@xxxxxxxxxxxxxx
Subject: Convert bytea to Float8

 

Can someone please answer what I hope to be an easy question?  I am trying to convert 8 bytes of a bytea into a float8. 

In C# this code looks like:

xCoord = System.BitConverter.ToDouble(arrByte, cnt) ;

But in my plpgsql function, the following gives me an error:

xCoord := substring(arrByte from cnt for 8)::float8;

The error that I get is:

ERROR: 42846: cannot cast type bytea to double precision

 

I have also tried get_byte, but that seems to only be returning the single byte and not all 8bytes for the float.  Thanks in advance.

Lee Keel

 

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