Re: ResultSetMetaData + CachedResultSet bug

On Thu, 22 Jun 2006, Sergii Sinelnychenko wrote:

> Today I have found a strange bug in JDBC driver (I used the last version
> avilable - 8.2dev-503). The problem is with VARCHAR fields - driver returns
> "-1" on "getPrecision()" call. But class javax.sql.rowset.RowSetMetaDataImpl
> in its "setPrecision()" method requires values of 0 and more (javadoc sais
> "precision the total number of decimal digits; must be <code>0</code> or more
> ").
> I understand that in case of VARCHAR type we cannot speak about real number
> of decimal digits - but could just driver return 0 instead of -1?

That certainly looks like a reasonable thing to do for text types. The
one case that needs a little more thinking about is a numeric field that
has neither precision nor scale supplied. For this we currently return -1
for both precision and scale. The maximum precision of a numeric is 1000
digits, so we could divy it up evenly and make an unadorned numeric be
returned as numeric(1000,500), but that seems a little too much like just
making things up. Thoughts?

Kris Jurka