[请教]: ODBC里，SQLExecute执行insert，如何判定键值重复或者违反唯一约束？

ivhb

在 《ODBC Programmer's Reference》-> ODBC API Reference -> SQLExecDirect/SQLExecute 章节，关于他们的返回SQLSTATE说明：

23000         Integrity constraint violation
The prepared statement associated with the StatementHandle contained a parameter. The parameter value was NULL for a column defined as NOT NULL in the associated table column, a duplicate value was supplied for a column constrained to contain only unique values, or some other integrity constraint was violated.

我的问题是，怎么进一步区分违反了何种约束？ 难道要依靠错误给出的描述字串？

[ 本帖最后由 ivhb 于 2007-7-9 11:11 编辑 ]