On 04/01/11 11:47, Dmitry Yemanov wrote: > 01.04.2011 11:19, Kjell Rilbe wrote: > >> I'm not sure I made much sense... Tell me, does the standard specify >> anything regarding datatype change features? If so, what does it say? > It allows to alter a string column to a string one of the non-shorter > length. This is how FB works since the beginning. I cannot find any > reference to charset/collation details, unfortunately. >
Sooner of all we should treat 'non-shorter length' as 'something that makes data, stored in the column, be successfully represented after format change'. I.e. DFW that makes required checks, in some cases trivial (any -> utf8, same case/accent sensitivity), in other cases requiring full table scan. ------------------------------------------------------------------------------ Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
