Github user gczsjdy commented on a diff in the pull request:
https://github.com/apache/spark/pull/19977#discussion_r157939820
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
---
@@ -48,17 +48,26 @@ import org.apache.spark.unsafe.types.{ByteArray,
UTF8String}
> SELECT _FUNC_('Spark', 'SQL');
SparkSQL
""")
-case class Concat(children: Seq[Expression]) extends Expression with
ImplicitCastInputTypes {
+case class Concat(children: Seq[Expression], isBinaryMode: Boolean = false)
+ extends Expression with ImplicitCastInputTypes {
- override def inputTypes: Seq[AbstractDataType] =
Seq.fill(children.size)(StringType)
- override def dataType: DataType = StringType
+ def this(children: Seq[Expression]) = this(children, false)
--- End diff --
Sorry I didn't get it. We have the default parameter of `isBinaryMode =
true`
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