使用复合主键对Table进行Kotlin公开SQL查询，并选择所有包含在给定DTO对象列表中的对象

问题描述

考虑以下伪代码：

object EntityTable : Table("ENTITY") {
    val uid = uuid("uid")
    val idCluster = integer("id_cluster")
    val idDataSchema = integer("id_data_schema")
    val value = varchar("value",1024)

    override val primaryKey = PrimaryKey(uid,idCluster,idDataSchema,name = "ENTITY_PK")
}

var toBeFound = listof(
    EntityDTO(uid = UUID.fromString("4..9"),idCluster = 1,idDataSchema = 1),EntityDTO(uid = UUID.fromString("7..3"),idDataSchema = 2),EntityDTO(uid = UUID.fromString("6..2"),idCluster = 2,idDataSchema = 1)
)

fun selectManyEntity() : List<EntityDTO> {
    val entityDTOs = transaction {
        val queryResultRows = EntityTable.select {
            (EntityTable.uid,EntityTable.idCluster,EntityTable.idDataSchema) // <-- every row for which the compound key combination of all three
                inList
            toBeFound.map {
                (it.uid,it.idCluster,it.idDataSchema)                        // <-- has an element in 'toBeFound` list with the same compound key combination
            }
        }
        queryResultRows.map { resultRow -> Fillers().newEntityDTO(resultRow) }.toList()
    }
    return entityDTOs
}

我该如何编写它选择的查询

EntityTable的所有行（复合主键为（id，idCluster，idDataSchema））
假定给定List中的每个EntityDTO，也包含在给定List中。
也有字段id，idCluster，idDataSchema）???

是否有帮助：EntityDTO在这三个字段上都重载了hash（）和equals（）。

解决方法

唯一的方法是使复合表达式如下：

fun EntityDTO.searchExpression() = Op.build { 
  (EntityTable.uid eq uid) and (EntityTable.idCluster eq idCluster) and (EntityTable.idDataSchema eq idDataSchema)
}

val fullSearchExpression = toBeFound.map { it.searchExpression() }.compoundOr()

val queryResultRows = EntityTable.select(fullSearchExpression)