BUG in collate() function

[siren186]

student 表如下：

name	age
XiaoMing	18
XiaoHong	19
DongDong	20

我用 SQL 查询没问题：SELECT name FROM student WHERE name IS 'xiaoming' COLLATE NOCASE
但我用 WCDB 查询的时候，返回空。代码如下：

int main()
{
    WCDB::Database db("E:\\test.db");

    // SELECT name FROM student WHERE name IS 'xiaoming' COLLATE NOCASE
    auto stmt = WCDB::StatementSelect()
        .select(WCDB::Column("name"))
        .from("student")
        .where(WCDB::Column("name").is("xiaoming").collate("NOCASE"));

    auto val = db.getValueFromStatement(stmt);
    if (val.hasValue())
    {
        std::cout << "success";
    }
    else
    {
        std::cout << "not found"; // 代码会执行到这里，打印 not found
    }
}