Github user liancheng commented on a diff in the pull request: https://github.com/apache/spark/pull/8971#discussion_r41426190 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala --- @@ -399,24 +415,164 @@ private[sql] object BINARY extends ByteArrayColumnType(16) { override def getField(row: InternalRow, ordinal: Int): Array[Byte] = { row.getBinary(ordinal) } + + def serialize(value: Array[Byte]): Array[Byte] = value + def deserialize(bytes: Array[Byte]): Array[Byte] = bytes } -// Used to process generic objects (all types other than those listed above). Objects should be -// serialized first before appending to the column `ByteBuffer`, and is also extracted as serialized -// byte array. -private[sql] case class GENERIC(dataType: DataType) extends ByteArrayColumnType(16) { - override def setField(row: MutableRow, ordinal: Int, value: Array[Byte]): Unit = { - row.update(ordinal, SparkSqlSerializer.deserialize[Any](value)) +private[sql] case class DECIMAL(precision: Int, scale: Int) --- End diff -- Maybe rename this one as `LARGE_DECIMAL` (in contrast to `COMPACT_DECIMAL`) since this only handles decimals with precision >= 19.
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