Thread: query configuration for validate empty quote to zero

query configuration for validate empty quote to zero

From
"Yudie"
Date:
We just changed the postgresql server and got some problem with sql command
in our old server we can exexute this query:
 
SELECT * FROM product WHERE prdtnumber = ''
 
field prdtnumber data type is integer and the empty quote somehow can be assumed into 0 (zero)
Now,  if I use the same query it return an error:
invalid input syntax for integer: ""
 
Anyone know what's the problem??
 
Thanks
 
Yudie
 
 

Re: query configuration for validate empty quote to zero

From
Tom Lane
Date:
"Yudie" <yudie@axiontech.com> writes:
> Now,  if I use the same query it return an error:
> invalid input syntax for integer: ""

> Anyone know what's the problem??

None.  That's an intentional change.  The fact that it ever accepted
'' as meaning 0 was a bug.
        regards, tom lane


Re: query configuration for validate empty quote to zero

From
"Yudie"
Date:
The problem is not stop there, I had a table that can't be updated since
then with this simply command:
update prdttable set webinclude = '0' where prdtnumber = '6002'

Again, the errors (invalid input syntax for integer: "") apears.

Then I found this temporary solution to make replica to this record to
another table in sense of update the value in the new table.
1. Create table prdt_problem as select * form prdttable where prdtnumber =
'6002';

2. Update prdt_problem set webinclude = '0' where prdtnumber = '6002';

3. Delete from prdttable where prdtnumber = '6002';

4. Insert into prdttable select * from prdt_problem

How to fix this bug?

> None.  That's an intentional change.  The fact that it ever accepted
> '' as meaning 0 was a bug.
>
> regards, tom lane
>




Re: query configuration for validate empty quote to zero

From
KÖPFERL Robert
Date:
Did you try to explicitly give the type for the literal?
e.g.  ''::varchar 
 
 -----Original Message-----
From: Yudie [mailto:yudie@axiontech.com]
Sent: Montag, 17. Jänner 2005 19:44
To: pgsql-sql@postgresql.org
Subject: [SQL] query configuration for validate empty quote to zero

We just changed the postgresql server and got some problem with sql command
in our old server we can exexute this query:
 
SELECT * FROM product WHERE prdtnumber = ''
 
field prdtnumber data type is integer and the empty quote somehow can be assumed into 0 (zero)
Now,  if I use the same query it return an error:
invalid input syntax for integer: ""
 
Anyone know what's the problem??
 
Thanks
 
Yudie