xuanyuanking commented on a change in pull request #27478: [SPARK-25829][SQL]
Add config `spark.sql.legacy.allowDuplicatedMapKeys` and change the default
behavior
URL: https://github.com/apache/spark/pull/27478#discussion_r379999008
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ArrayBasedMapBuilder.scala
##########
@@ -63,6 +68,11 @@ class ArrayBasedMapBuilder(keyType: DataType, valueType:
DataType) extends Seria
keys.append(key)
values.append(value)
} else {
+ if (!allowDuplicatedMapKey) {
+ throw new RuntimeException(s"Duplicate map key $key was founded,
please set " +
Review comment:
Thanks, done in 905ae96.
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