scala - 如何使用inSetBind过滤Slick中的多列？

我有以下表格定义(简化):

class Houses(tag: Tag) extends Table[HouseRow](tag, "HOUSE") {
  def houseId = column[Long]("HOUSE_ID", O.NotNull, O.PrimaryKey, O.AutoInc)
  def houseName = column[String]("HOUSE_NAME", O.NotNull)
  def houseType = column[String]("HOUSE_TYPE", O.NotNull)

  def uniqueHouseName = index("UQ_HOUSE_NAME_HOUSE_TYPE", (houseName, houseType), true)

  def * = (houseId, houseName, houseType) <> (HouseRow.tupled, HouseRow.unapply)
}

val houses = TableQuery[Houses]

我想选择与一组uniqueHouseName索引相匹配的房子，如下所示。

case class HouseKey(houseName: String, houseType: String)
val houseKeys: Seq(HouseKey("name1", "type1"), HouseKey("name2", "type2"))

天真的inSetBind过滤器将匹配例如。 HouseRow(ID, "name1", "type2")不正确。
在MySql中，我将执行以下操作:

SELECT * FROM HOUSE h
WHERE(h.HOUSE_TYPE, d.HOUSE_NAME) IN
(
  SELECT 'type1' as HOUSE_TYPE, 'name1' as HOUSE_NAME
  UNION
  SELECT 'type2', 'name2'
);

最佳答案

修改tuxdna的答案以允许任意序列。但是，此查询目前无法预编译为SQL，并且具有运行时开销。

val filteredHouses =
  houses.filter(h =>
    houseKeys.map(hk => h.houseName === hk.houseName && h.houseType === hk.houseType)
              .reduce(_ || _)
  )