lan*_*nyf 3 sql-delete android-room
拥有一款Android房三个用表timestamp,index,details,以及三者有
@PrimaryKey @ColumnInfo(name = "id") var id: Int = 0
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必须fun clearDataByID(idList: List<Int>) 通过清除所有三个表id中的数据idList
道为:
@Dao
interface DataDAO {
@Transaction
fun clearDataByID(idList: List<Int>) {
deleteDataInTimestamp(idList)
deleteDataIndex(idList)
deleteDataDetails(idList)
}
@Query("delete from timestamp where id in :idList")
fun deleteDataInTimestamp(idList: List<Int>)
@Query("delete from index where id in :idList")
fun deleteDataIndex(idList: List<Int>)
@Query("delete from details where id in :idList")
fun deleteDataDetails(idList: List<Int>)
}
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但是它会得到编译器错误(这三个都相似)
error: no viable alternative at input 'delete from timestamp where id in :idList'
public abstract void deleteDataInTimestamp(@org.jetbrains.annotations.NotNull()
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如果通过单个ID删除则可以。
如何通过ID列表删除?
@Query("delete from timestamp where id = :id")
fun deleteSingleTimestamp(id: Int)
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感谢Simon指出了类似的问题,它应该像这样完成:
@Query("delete from timestamp where id in (:idList)")
fun deleteDataInTimestamp(idList: List<Int>)
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只是扩展@lannyf给出的答案
@Query("delete from timestamp where id in (:idList)")
fun deleteDataInTimestamp(idList: List<Int>)
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这也可以这样写
@Query("delete from timestamp where id = :idList")
fun deleteDataInTimestamp(idList: List<Int>)
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PS:编辑队列已满
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