Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/9358#discussion_r46657310 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala --- @@ -37,3 +37,120 @@ trait Encoder[T] extends Serializable { /** A ClassTag that can be used to construct and Array to contain a collection of `T`. */ def clsTag: ClassTag[T] } + +object Encoder { + import scala.reflect.runtime.universe._ + + def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder(flat = true) + def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder(flat = true) + def SHORT: Encoder[java.lang.Short] = ExpressionEncoder(flat = true) + def INT: Encoder[java.lang.Integer] = ExpressionEncoder(flat = true) + def LONG: Encoder[java.lang.Long] = ExpressionEncoder(flat = true) + def FLOAT: Encoder[java.lang.Float] = ExpressionEncoder(flat = true) + def DOUBLE: Encoder[java.lang.Double] = ExpressionEncoder(flat = true) + def STRING: Encoder[java.lang.String] = ExpressionEncoder(flat = true) --- End diff -- @cloud-fan Could you share me your idea why we do not add the other basic types like DecimalType, DateType and TimestampType? Thank you! DecimalType -> java.math.BigDecimal DateType -> java.sql.Date TimestampType -> java.sql.Timestamp
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