Problem with replace function in postgres

[akp geek <akpgeek@xxxxxxxxx>]

Dear all -

                I am having trouble with replace function inside a function.  If I do the same replace function outside it works fine, Following example clearly explains my problem. Can you please help?

create table str_table

( mystr varchar(1000));

insert into str_table values ( 'This road is INDEFLY CLSD');

insert into str_table values('That is INDEFLY open');   

insert into str_table values('That is a CLSD road');

select * from str_table;

create table lookup

( code varchar(100),

  codeword varchar(100));

  

insert into lookup values(  'INDEFLY','indefinitely');

insert into lookup values(  'CLSD','closed');

select 'This road is INDEFLY CLSD', test_repl('This road is INDEFLY CLSD INDEFLY') replaced_str

from str_table;

RESULT SET "  This road is INDEFLY CLSD;This road is indefinitely closed INDEFLY  "

Regards