Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/16240#discussion_r93811936
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
---
@@ -100,31 +97,36 @@ abstract class SQLImplicits {
// Seqs
/** @since 1.6.1 */
- implicit def newIntSeqEncoder: Encoder[Seq[Int]] = ExpressionEncoder()
+ implicit def newIntSeqEncoder[T <: Seq[Int] : TypeTag]: Encoder[T] =
ExpressionEncoder()
/** @since 1.6.1 */
- implicit def newLongSeqEncoder: Encoder[Seq[Long]] = ExpressionEncoder()
+ implicit def newLongSeqEncoder[T <: Seq[Long] : TypeTag]: Encoder[T] =
ExpressionEncoder()
/** @since 1.6.1 */
- implicit def newDoubleSeqEncoder: Encoder[Seq[Double]] =
ExpressionEncoder()
+ implicit def newDoubleSeqEncoder[T <: Seq[Double] : TypeTag]: Encoder[T]
= ExpressionEncoder()
/** @since 1.6.1 */
- implicit def newFloatSeqEncoder: Encoder[Seq[Float]] =
ExpressionEncoder()
+ implicit def newFloatSeqEncoder[T <: Seq[Float] : TypeTag]: Encoder[T] =
ExpressionEncoder()
/** @since 1.6.1 */
- implicit def newByteSeqEncoder: Encoder[Seq[Byte]] = ExpressionEncoder()
+ implicit def newByteSeqEncoder[T <: Seq[Byte] : TypeTag]: Encoder[T] =
ExpressionEncoder()
/** @since 1.6.1 */
- implicit def newShortSeqEncoder: Encoder[Seq[Short]] =
ExpressionEncoder()
+ implicit def newShortSeqEncoder[T <: Seq[Short] : TypeTag]: Encoder[T] =
ExpressionEncoder()
/** @since 1.6.1 */
- implicit def newBooleanSeqEncoder: Encoder[Seq[Boolean]] =
ExpressionEncoder()
+ implicit def newBooleanSeqEncoder[T <: Seq[Boolean] : TypeTag]:
Encoder[T] = ExpressionEncoder()
/** @since 1.6.1 */
- implicit def newStringSeqEncoder: Encoder[Seq[String]] =
ExpressionEncoder()
+ implicit def newStringSeqEncoder[T <: Seq[String] : TypeTag]: Encoder[T]
= ExpressionEncoder()
/** @since 1.6.1 */
- implicit def newProductSeqEncoder[A <: Product : TypeTag]:
Encoder[Seq[A]] = ExpressionEncoder()
+ implicit def newProductSeqEncoder[A <: Product, T <: Seq[A] : TypeTag]:
Encoder[T] =
--- End diff --
can we just use `newProductSeqEncoder[T <: Seq[Product] : TypeTag]:
Encoder[T]` here? Then we don't need to workaround implicit
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