Returns the length of a field's data in the current row of a result set. This only needs to be called for strings to determine how many bytes to use. Note that the return value does not include the null terminator.
int SQL_FetchSize(Handle query, int field)
A query (or statement) Handle.
The field index (starting from 0).
Number of bytes for the field's data size.
Invalid query Handle or field index or no current result set.