Question

我基本上试图在条件中创建这个SQL查询。 sql查询非常简单，但要使用条件查询执行此操作，我必须从分离的条件中选择属性。任何帮助将不胜感激。

Select y0_ from 
(
    SELECT distinct TOP (1000) this_.Id as y0_, this_.InstrumentNumber as y1_ 
    FROM [SearchRecorderInstrument] this_ 
    inner join [SearchRecorderName] name1_ on this_.Id=name1_.SearchRecorderInstrument_id 
    inner join [NameType] nt4_ on name1_.NameType_id=nt4_.Id 
    inner join [SearchRecorderPropertyLegal] pl5_ on this_.Id=pl5_.SearchRecorderInstrument_id 
    inner join [DocumentType] dt2_ on this_.DocumentType_id=dt2_.Id 
    inner join [DocumentCategory] dc3_ on dt2_.DocumentCategory_id=dc3_.Id 
    WHERE name1_.FIPSCode = '26049' and name1_.LastName like 'smith%' and not (1=0) 
    ORDER BY this_.InstrumentNumber desc
) [b]

这就是我到目前为止所做的：

var criteria4 = DetachedCriteria.For(typeof(SearchRecorderInstrument), "instr");

            criteria4.CreateCriteria("instr.Names", "name", NHibernate.SqlCommand.JoinType.InnerJoin);

            criteria4.CreateCriteria("instr.DocumentType", "dt", NHibernate.SqlCommand.JoinType.InnerJoin);

            criteria4.CreateCriteria("dt.DocumentCategory", "dc", NHibernate.SqlCommand.JoinType.InnerJoin);

            criteria4.CreateCriteria("name.NameType", "nt", NHibernate.SqlCommand.JoinType.InnerJoin);

            criteria4.CreateCriteria("instr.PropertyLegals", "pl", NHibernate.SqlCommand.JoinType.InnerJoin);

            criteria4.Add(Expression.Eq("name.FIPSCode", fipsCode));

            criteria4.Add(Expression.Like("name.LastName", lastName, MatchMode.Start));

            if (partyIndicator != null && partyIndicator > 0)
            {
                criteria4.Add(Expression.Eq("name.PartyIndicator", partyIndicator));
            }

            if (firstName != null && firstName != string.Empty)
            {
                criteria4.Add(Expression.Like("name.FirstName", firstName, MatchMode.Start));
            }

            if (beginDate != null)
            {
                criteria4.Add(Expression.Ge("instr.RecordedDate", beginDate.Value));
            }

            if (endDate != null)
            {
                criteria4.Add(Expression.Lt("instr.RecordedDate", endDate.Value.AddDays(1)));
            }

            if (consFrom != null)
            {
                criteria4.Add(Expression.Ge("instr.Consideration", consFrom));
            }

            if (consTo != null)
            {
                criteria4.Add(Expression.Le("instr.Consideration", consTo));
            }

            if (documentTypeIds != null && documentTypeIds.Any())
            {
                disabledDocTypes = documentTypeIds.Where(x => !disabledDocTypes.Contains(x)).ToList();
                criteria4.Add(Expression.In("dt.Id", disabledDocTypes));
            }
            else
            {
                criteria4.Add(Expression.Not(Expression.In("dt.Id", disabledDocTypes)));
            }

            foreach (var item in legalSearchCriteria)
            {
                var val = item.Filter.FilterType.Value;
                switch (val)
                {
                    case "LIKE":
                        criteria.Add(Expression.Like("pl." + item.Filter.Field, item.Value));
                        break;
                    case ">=":
                        criteria.Add(Expression.Ge("pl." + item.Filter.Field, item.Value));
                        break;
                    case "<=":
                        criteria.Add(Expression.Le("pl." + item.Filter.Field, item.Value));
                        break;
                    case "=":
                        criteria.Add(Expression.Eq("pl." + item.Filter.Field, item.Value));
                        break;
                }
            }

            foreach (var item in sortDescriptors)
            {
                if (item.SortDescriptorDirection.ToString() == "ASC")
                {
                    criteria4.AddOrder(Order.Asc(item.ColumnName));
                }
                else
                {
                    criteria4.AddOrder(Order.Desc(item.ColumnName));
                }
            }

            criteria4.SetProjection(
                Projections.ProjectionList()
                .Add(Projections.Distinct(Projections.Property("instr.Id")), "InstrumentId")
                .Add(Projections.Property("instr.InstrumentNumber"), "InstrumentNumber"));

            criteria4.SetFirstResult(skip).SetMaxResults(rowsViewed);

我需要从此分离查询中仅选择InstrumentId。所以到目前为止我已经想出了类似的东西，但我认为这不会起作用：

var criteria5 = sess.CreateCriteria<SearchRecorderInstrument>("instr");
            criteria5.Add(Subqueries.Select(criteria4));

Answer 1

我假设您加入.CreateCriteria（“ForeignCollection”）
加入别名可以通过额外的重载来完成.CreateCriteria（“ForeignCollection”，“aliasname”）

在Where部分，您可以使用“aliasname”，例如“aliasname.Id”（即使这是DetachedCriteria中的名称，但是您的查询看起来不像需要分离标准）

<强>更新

我认为你应该考虑只选择分离标准中的仪器IDS（即标准4），而不是仪器编号。
接下来，您可以将criteria4用于子查询，例如：

Subqueries.PropertyEq("instr.InstrumentId", criteria4)

其中instr是criteria5

中的别名

使用criteria5选择相应的工具数

使用NHibernate从分离的Criteria中选择别名属性

1 个答案: