Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/14353#discussion_r72185594
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
---
@@ -33,13 +33,24 @@ case class CreateArray(children: Seq[Expression])
extends Expression {
override def foldable: Boolean = children.forall(_.foldable)
- override def checkInputDataTypes(): TypeCheckResult =
- TypeUtils.checkForSameTypeInputExpr(children.map(_.dataType),
"function array")
+ override def checkInputDataTypes(): TypeCheckResult = {
+ if (children.map(_.dataType).forall(_.isInstanceOf[DecimalType])) {
+ TypeCheckResult.TypeCheckSuccess
--- End diff --
```scala
scala> sql("create table d1(a DECIMAL(3,2))")
scala> sql("create table d2(a DECIMAL(2,1))")
scala> sql("insert into d1 values(1.0)")
scala> sql("insert into d2 values(1.0)")
scala> sql("select * from d1, d2").show()
+----+---+
| a| a|
+----+---+
|1.00|1.0|
+----+---+
scala> sql("select array(d1.a,d2.a),array(d2.a,d1.a),* from d1, d2")
res5: org.apache.spark.sql.DataFrame = [array(a, a): array<decimal(3,2)>,
array(a, a): array<decimal(3,2)> ... 2 more fields]
scala> sql("select array(d1.a,d2.a),array(d2.a,d1.a),* from d1, d2").show()
+------------+------------+----+---+
| array(a, a)| array(a, a)| a| a|
+------------+------------+----+---+
|[1.00, 1.00]|[1.00, 1.00]|1.00|1.0|
+------------+------------+----+---+
```
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