message: Now, SQLFreeStmt can clear bound parameters.
diff: @@ -156,7 +156,7 @@ SQLRETURN SQLFreeStmt(SQLHSTMT statement_handle, SQLUSMALLINT option) {
  stmt->chunk.reset();
  // stmt->stmt.reset(); // the statment can be reuse in prepared statement
  stmt->bound_cols.clear();
  - // stmt->params.clear(); // parameters can be reuse in prepared statement
  + stmt->params.clear();
  return SQL_SUCCESS;
  });
  }
  