这个HQL有什么问题？ “没有节点的数据类型”

session.createQuery("Select attribute from GoodsSection tgs " +
    "join gs.ascendants ags join ags.attributes attribute " +
    "where attribute.outerId = :outerId and tgs = :section ")
.setString("outerId", pOuterId)
.setEntity("section", section)
.setMaxResults(1)
.uniqueResult();

Looks fine to me, but the result is

看起来很好，但结果是

java.lang.IllegalStateException: No data type for node: org.hibernate.hql.ast.tree.IdentNode 
 \-[IDENT] IdentNode: 'attribute' {originalText=attribute}

    at org.hibernate.hql.ast.tree.SelectClause.initializeExplicitSelectClause(SelectClause.java:145)
    at org.hibernate.hql.ast.HqlSqlWalker.useSelectClause(HqlSqlWalker.java:705)
    at org.hibernate.hql.ast.HqlSqlWalker.processQuery(HqlSqlWalker.java:529)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:645)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:229)

Why? What's wrong?

为什么？怎么了？

2 个解决方案

#1

You haven't defined the "gs" alias. You only have "ags" and "tgs".

您尚未定义“gs”别名。你只有“ags”和“tgs”。

#2

-1

when this error appeared, you should know that there are the typo or no space between words or variables not found.

当出现此错误时，您应该知道在找不到的单词或变量之间存在拼写错误或没有空格。

#1