如何構建具有多列的CriteriaQuery謂詞IN子句？

Question

鑑於在CriteriaQuery中使用的Predicate，例如，這：

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

這可以擴展到使用多個「與」字段，例如：與下面的SQL相同？

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

Answer 1

並非如此巧妙的方法，使用JPA標準建造

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"); 

第二種方法

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") 
        ) 
      );