Hi.
I'm using 7.0.3 and I've found a bug:
create table test(value int4);
create function testfunc(int4)
RETURNS bool AS
'SELECT count(*)>0 AS RESULT FROM test where value= $1'
language 'SQL';
So I want this function to return true when it finds the specified
value in the table. It does not work when you have a null in the
table and call it with a null.
insert into test values (NULL);
select testfunc(NULL);
testfunc
----------
f
(1 row)
select * from test;
value
-------
(1 row)
Now if I really muck with the expression...
create function testfunc1(int4)
RETURNS bool AS
'SELECT count(*)>0 AS RESULT FROM test where value= $1 OR
(value=NULL AND $1=NULL)'
language 'SQL';
It works:
select testfunc1(NULL);
testfunc1
-----------
t
(1 row)
-Michael
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