473,242 Members | 1,685 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,242 software developers and data experts.

Casting hexadecimal to int

I was looking for a way to cast hex numbers (stored in a varchar column)
to int. I found many people asking the same thing, but no answers.

It seems that this is supported by the following syntax

select x'1f'::int;

Since this doesn't work with variable values, I wrote this following
function. Perhaps it will help anyone wanting to do the same thing.

CREATE OR REPLACE FUNCTION hex_to_int(varchar) RETURNS integer AS '
DECLARE
h alias for $1;
exec varchar;
curs refcursor;
res int;
BEGIN
exec := ''SELECT x'''''' || h || ''''''::int'';
OPEN curs FOR EXECUTE exec;
FETCH curs INTO res;
CLOSE curs;
return res;
END;'
LANGUAGE 'plpgsql'
IMMUTABLE
STRICT;

--
Richard van den Berg, CISSP

Trust Factory B.V. | http://www.trust-factory.com/
Bazarstraat 44a | Phone: +31 70 3620684
NL-2518AK The Hague | Fax : +31 70 3603009
The Netherlands |
Jul 19 '05 #1
0 5882

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

4
by: James DeClerk | last post by:
Hi everyone. I'm new to C++ and I've got a seemingly tough problem to tackle. I have a union. This union needs to be converted into hexadecimal format. The hexadecimal number is then...
10
by: pavithra.eswaran | last post by:
Hi, I would like to convert a single precision hexadecimal number to floating point. The following program seems to work fine.. But I do not want to use scanf. I already have a 32 bit hexadecimal...
5
by: Damon | last post by:
I'm getting '', hexadecimal value 0x02, is an invalid character when I'm deseralizing XML from a 3rd party XML gateway. How do I get rid of these hexadecimal values before I deserialize? Cheers...
1
by: Fernando Barsoba | last post by:
Hi all, First of all, I'd like to thank you "Skarmander" and "Flash Gordon" for the help they provided me: Skarmander's algorithm and Flash's modifications helped me a lot. Here's the problem...
15
by: jaks.maths | last post by:
How to convert negative integer to hexadecimal or octal number? Ex: -568 What is the equivalent hexadecimal and octal number??
8
by: Vijay | last post by:
Hi , I am doing a small project in c. I have a Hexadecimal file and want to convert into ascii value. (i.e., Hexadecimal to Ascii conversion from a file). Could anyone help me? Thanks in...
7
by: elliotng.ee | last post by:
I have a text file that contains a header 32-bit binary. For example, the text file could be: %%This is the input text %%test.txt Date: Tue Dec 26 14:03:35 2006...
5
by: Just D | last post by:
All, Any valuable idea about subj: "The '%' character, hexadecimal value 0x25" ? I tried to google, but nothing interesting was found. Is it IIS settings problem, user side problem or...
6
by: Andrea | last post by:
Hi, suppose that I have a string that is an hexadecimal number, in order to print this string I have to do: void print_hex(unsigned char *bs, unsigned int n){ int i; for (i=0;i<n;i++){...
6
by: sweeet_addiction16 | last post by:
hello Im writin a code in c... can sum1 pls help me out in writing a c code to convert decimalnumber to hexadecimal number.The hexadecimal number generated has to be an unsigned long.
0
by: abbasky | last post by:
### Vandf component communication method one: data sharing ​ Vandf components can achieve data exchange through data sharing, state sharing, events, and other methods. Vandf's data exchange method...
2
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 7 Feb 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:30 (7.30PM). In this month's session, the creator of the excellent VBE...
0
Git
by: egorbl4 | last post by:
Скачал я git, хотел начать настройку, а там вылезло вот это Что это? Что мне с этим делать? ...
1
by: davi5007 | last post by:
Hi, Basically, I am trying to automate a field named TraceabilityNo into a web page from an access form. I've got the serial held in the variable strSearchString. How can I get this into the...
0
by: MeoLessi9 | last post by:
I have VirtualBox installed on Windows 11 and now I would like to install Kali on a virtual machine. However, on the official website, I see two options: "Installer images" and "Virtual machines"....
0
by: DolphinDB | last post by:
The formulas of 101 quantitative trading alphas used by WorldQuant were presented in the paper 101 Formulaic Alphas. However, some formulas are complex, leading to challenges in calculation. Take...
0
by: DolphinDB | last post by:
Tired of spending countless mintues downsampling your data? Look no further! In this article, you’ll learn how to efficiently downsample 6.48 billion high-frequency records to 61 million...
0
by: Aftab Ahmad | last post by:
Hello Experts! I have written a code in MS Access for a cmd called "WhatsApp Message" to open WhatsApp using that very code but the problem is that it gives a popup message everytime I clicked on...
0
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). In this month's session, we are pleased to welcome back...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.