Question on pgpsql function - Mailing list pgsql-admin

Hi Everybody,
 
   I am using Postgres 8.1.0 and I have a requirement.
 
 I have a table
 
  create table weekly_tbl (id int, week_flag bit(7) not null default '1111111');
 
I want to create a function like this
 
create function week_func (int) returns weekly_tbl as
$$
  select id,
           substr(week_flag,1,1) as monday_flag,
           substr(week_flag,2,1) as tuesday_flag,
           substr(week_flag,3,1) as wednesday_flag,
           substr(week_flag,4,1) as thursday_flag,
           substr(week_flag,5,1) as friday_flag,
           substr(week_flag,6,1) as saturday_flag,
           substr(week_flag,7,1) as sunday_flag
    from weekly_tbl where id=$1;
$$
language SQL;
 
 I am getting an error message

ERROR:  function substr(bit, integer, integer) does not exist
HINT:  No function matches the given name and argument types. You may need to add explicit type casts.
CONTEXT:  SQL function "week_func"

 
I know I can do this in view.  But for a purpose, I don't want to do it in view. Can somebody help me?
 
Regards
skarthi

 

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