Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/19977#discussion_r157936581
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala
---
@@ -566,6 +568,21 @@ object TypeCoercion {
}
}
+ /**
+ * When all inputs in [[Concat]] are binary, coerces an output type to
binary
+ */
+ case class ConcatCoercion(conf: SQLConf) extends TypeCoercionRule {
+ override protected def coerceTypes(
+ plan: LogicalPlan): LogicalPlan = plan transformExpressionsUp {
--- End diff --
This is in the big batch of analyzer rules: `Batch("Resolution")`. This
rule will be executed without the stop condition.
cc @cloud-fan Should we do it in `Batch("Finish Analysis")`? Any better
idea?
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