Re: ParameterMetaData getPrecision() always zero?

On Thu, 28 Jan 2010, Simon Temple wrote:

>     ParameterMetaData m = stat.getParameterMetaData(  );
>     int colWidth = m.getPrecision( parameterIndex );
> 
> For varchar columns I would expect to get the maximum column width.  So 8
> for a varchar(8).
> 
> I always get zero as a result.
>

This is the best the JDBC driver can do.  When preparing a statement, the 
server only returns the datatypes, not additional details about the size. 
This is because the parameters do not always match up with a table column. 
Consider "WHERE replace(col, 'a', 'bb') = ?"  you won't be able to tell 
the parameter size from that.

Kris Jurka