Invalid syntax for integer - Mailing list pgsql-sql

From Rehan Saleem
Subject Invalid syntax for integer
Date
Msg-id 1331663138.21401.YahooMailNeo@web121606.mail.ne1.yahoo.com
Whole thread Raw
Responses Re: Invalid syntax for integer  ("David Johnston" <polobo@yahoo.com>)
List pgsql-sql
hi ,

what is wrong with this if statement in this function

if distance ='' THEN
    distance := 1;
    end if;
here distance variable is of type integer , this function has been created successfully but when i execute this function it gives me this error ,

ERROR:  invalid input syntax for integer: ""
LINE 1: SELECT distance =''
                                ^
QUERY:  SELECT distance =''
CONTEXT:  PL/pgSQL function "getsitesbytfid" line 6 at IF

********** Error **********

ERROR: invalid input syntax for integer: ""
SQL state: 22P02
Context: PL/pgSQL function "getsitesbytfid" line 6 at IF


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