failure converting to numeric

Hi,

Here's a patch for ctlib/cs.c:

--- src\src\ctlib\cs#1.c    2014-02-05 20:04:52.000000000 +-0100
+++ src\src\ctlib\cs.c      2014-02-05 19:47:01.000000000 +-0100
@@ -566,13 +566,13 @@
                               destdata = destvc->str;
               }
                tdsdump_log(TDS_DBG_FUNC, "converting type %d (%d bytes) to type = %d (%d bytes)\n",
                                   src_type, src_len, desttype, destlen);
-              if (!is_fixed_type(desttype) && (destlen <= 0)) {
+             if (!is_fixed_type(desttype) && !is_numeric_type(desttype) && (destlen <= 0)) {
                               return CS_FAIL;
               }
                dest = (unsigned char *) destdata;
                /* many times we are asked to convert a data type to itself */

The change is in cs_convert(). When converting a string to SQL's numeric, the call sequence to_numeric() -> cs_convert() fails if destlen is unset. However, destlen is never needed for the conversion since the conversion is based on the precision & scale of the numeric type.

I came across this when analysing a test failure in Perl's DBD-Sybase test suite.

Any comments? Can I/should I make a merge request on gitorious?

Thanks,
Sam

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