Thread: Format Function
Hi,
Is there any default function for formating string in postgre sql?
for instance:
Format('123ABCDE', '####-###-###') => '12-3AB-CDE'
Format('123ABCDE', '####-###-###') => '12-3AB-CDE'
The closest function I know is the to_char() function but it only works for numbers
please advise
Thanks
Yude
Yudie, > Is there any default function for formating string in postgre sql? > for instance: > Format('123ABCDE', '####-###-###') => '12-3AB-CDE' > > The closest function I know is the to_char() function but it only works for numbers No, there isn't. You could write one, though. For example, you could write: (7.3 syntax) CREATE FUNCTION yudie_format(text) RETURNS text AS 'SELECT SUBSTR($1, 1, 4) || ''-'' || SUBSTR($1,5,3) || ''-'' || SUBSTR($1,9,4); ' LANGUAGE SQL IMMUTABLE STRICT; As a simple formatting function. For that matter, it would be the work of a weekend for someone to write a function in PL/Perl which would take a format mask and apply it to any text string. -- -Josh BerkusAglio Database SolutionsSan Francisco
OK thanks for the answer. I made my function with plpgsql to do formating, It's not perfect but at least make it easy to do simple formating ============================================== CREATE FUNCTION myformat(text,text) returns text as'DECLARE i integer; n integer; strtemp text; BEGIN i := length($2); n := length($1); strtemp=''''; WHILE i > 0 AND n > 0 LOOP IF substr($2,i,1) = ''#'' THEN strtemp := substr($1,n,1) || strtemp; n := n - 1; ELSE strtemp := substr($2,i,1) || strtemp; END IF; i := i - 1; END LOOP; return strtemp;END ' language 'PLPGSQL' ----- Original Message ----- From: "Josh Berkus" <josh@agliodbs.com> To: "Yudie" <yudie@axiontech.com>; <pgsql-sql@postgresql.org> Sent: Monday, February 17, 2003 2:56 PM Subject: Re: [SQL] Format Function Yudie, > Is there any default function for formating string in postgre sql? > for instance: > Format('123ABCDE', '####-###-###') => '12-3AB-CDE' > > The closest function I know is the to_char() function but it only works for numbers No, there isn't. You could write one, though. For example, you could write: (7.3 syntax) CREATE FUNCTION yudie_format(text) RETURNS text AS 'SELECT SUBSTR($1, 1, 4) || ''-'' || SUBSTR($1,5,3) || ''-'' || SUBSTR($1,9,4); ' LANGUAGE SQL IMMUTABLE STRICT; As a simple formatting function. For that matter, it would be the work of a weekend for someone to write a function in PL/Perl which would take a format mask and apply it to any text string. -- -Josh BerkusAglio Database SolutionsSan Francisco