Java “如何使用条件”;“最后为空”;在TopLink中的readAllQuery中的order by中
Hi需要在toplink中进行查询,该查询使用order by中的NULLS LAST子句。基本上这就是我想做的查询:Java “如何使用条件”;“最后为空”;在TopLink中的readAllQuery中的order by中,java,toplink,Java,Toplink,Hi需要在toplink中进行查询,该查询使用order by中的NULLS LAST子句。基本上这就是我想做的查询: select * from VW_SEGNA_PRZZ_DEP_INFO where ente_cd = '7316' and refr_cd = '000070434' order by dp_dt_timestamp_modifica DESC NULLS LAST; 这是我的代码: ReadAllQuery query = new ReadAllQuer
select * from VW_SEGNA_PRZZ_DEP_INFO where ente_cd = '7316' and refr_cd = '000070434' order by dp_dt_timestamp_modifica DESC NULLS LAST;
这是我的代码:
ReadAllQuery query = new ReadAllQuery();
query.setReferenceClass(VwSegnaPrzzDepInfo.class);
Expression exp = new ExpressionBuilder();
exp =
exp.and(new ExpressionBuilder().get("enteCd").equal(getEnteCd()));
exp =
exp.and(new ExpressionBuilder().get("refrCd").equal(spdf.getRefrCd()));
query.setSelectionCriteria(exp);
query.addDescendingOrdering("dpDtTimestampModifica");
我不知道如何插入NULLS LAST子句。我正在使用toplink 3.0和Oracle 9i作为数据库。您可以使用
query.addOrdering(表达式)
要创建表达式,您需要创建自己的ExpressionOperator,它将自身打印为“DESC NULLS LAST”(以DESC运算符为例)