Re: jdbc ResultSetMetaData::isWritable()

On Thu, 6 Sep 2001 14:26:49 -0400 (EDT), you wrote:
>Well, if it is that easy, I can do it. Patch attached and applied.
>
>> On Mon, 3 Sep 2001 22:01:17 -0500, you wrote:
>> public boolean isWritable(int column) throws SQLException
>> {
>> return !isReadOnly(column);
>> }

Actually, I think this change has a consequence for this method
in the same class:

public boolean isDefinitelyWritable(int column)
throws SQLException
{
return isWritable(column);
}

This is from the JDBC spec
(http://java.sun.com/j2se/1.3/docs/api/java/sql/ResultSetMetaData.html):

isReadOnly() - Indicates whether the designated column is
definitely not writable.

isWritable() - Indicates whether it is possible for a write on
the designated column to succeed.

isDefinitelyWritable() - Indicates whether a write on the
designated column will definitely succeed.

At this time we don't really implement the fine semantics of
these methods. I would suggest the following defaults:

isReadOnly() false
isWritable() true
isDefinitelyWritable() false

And that would mean that your patch is correct, but
isDefinitelyWritable() would need to be patched accordingly:

public boolean isDefinitelyWritable(int column)
throws SQLException
{
return false;
}

Again, both in jdbc1 and jdbc2.

Regards,
René Pijlman <rene(at)lab(dot)applinet(dot)nl>