Re: creating a function returning FALSE on NULL input ? - Mailing list pgsql-general

On 7 Nov 2012, at 6:33, Yvon Thoraval wrote:

> CREATE FUNCTION has_infos(text) RETURNS boolean AS 'select character_length($1) > 0;' LANGUAGE SQL IMMUTABLE RETURNS
FALSEON NULL INPUT; 

Try:
CREATE FUNCTION has_infos(text) RETURNS boolean AS 'select coalesce(character_length($1) > 0, false);' LANGUAGE SQL
IMMUTABLE;

Alban Hertroys

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