如何建立具有多个列的CriteriaQuery谓词IN子句？

Question

给定Predicate用于CriteriaQuery，例如：

Predicate predicate = root.get(MyTable.col1).in("col1Val1", "col1Val2");

可以将其扩展为使用多个ANDed字段，例如，与下面的SQL相同吗？

SELECT *
FROM MyTable
WHERE (col1, col2, col3) IN (
    ("col1Val1", "col2Val1", "col3Val1"),
    ("col1Val2", "col2Val2", "col3Val2")
);

Answer 1

不是那么优雅的方法，使用 JPA 标准生成器

    Path<String> col1Path=root.get("col1");
    Path<String> col2Path=root.get("col2");
    Path<String> col3Path=root.get("col3");

    Predicate p0=criteriaBuilder.concat(col1Path,col2Path,col3Path)
         .in("col1Val1"||"col2Val1"||"col3Val1",
              "col1Val2"|| "col2Val2"|| "col3Val2");

第二种方法

    Path<String> col1Path=root.get("col1");
    Path<String> col2Path=root.get("col2");
    Path<String> col3Path=root.get("col3");

    Predicate p1=criteriaBuilder.or(
          criteriaBuilder.and(criteriaBuilder.equal(col1Path,"col1Val1"),
                              criteriaBuilder.equal(col2Path,"col2Val1"),
                              criteriaBuilder.equal(col3Path,"col3Val1") 
                              ), 
          criteriaBuilder.and(criteriaBuilder.equal(col1Path,"col1Val2"),
                   criteriaBuilder.equal(col2Path,"col2Val2"),
                   criteriaBuilder.equal(col3Path,"col3Val2") 
                   )
           );