Thanks Tom,
Actually I did not attach the latest function, I did have a limit of 9 numerical characters, found that out when I applied the update to move all current numerical values to that column.
Theo
-----Original Message-----
From: Tom Lane [mailto:[EMAIL PROTECTED]]
Sent: Thursday, 9 September 2004 9:57 AM
To: Theo Galanakis
Cc: [EMAIL PROTECTED]
Subject: Re: [SQL] Isnumeric function?
Theo Galanakis <[EMAIL PROTECTED]> writes:
> So I came up with the following. A Insert/update trigger would call a
> procedure to check to see if the content is numeric(a whole number),
> if so would update an indexed integer column called (content_numeric).
> Which would be the base column to search appon.
> CREATE OR REPLACE FUNCTION update_content_node()
> RETURNS trigger AS
> '
> begin
> /* New function body */
> IF NEW.content ~ \'^[0-9]+$\' THEN
> NEW.content_numeric := NEW.content;
> ELSE
> NEW.content_numeric := null;
Hmm. Seems like you could get burnt by "content" that is by chance a long string of digits --- you'd get an integer overflow error at the attempt to assign to content_numeric. Can you make an assumption that indexable keys are at most 9 digits? If so then
IF NEW.content ~ \'^[0-9]{1,9}$\' THEN
Or use a bigint column and crank up the number of digits appropriately.
regards, tom lane
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