HyukjinKwon commented on a change in pull request #23493: [MINOR] Follow up for
SPARK-23936, fixed description of "map_concat" function
URL: https://github.com/apache/spark/pull/23493#discussion_r246239774
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
##########
@@ -516,7 +516,7 @@ case class MapEntries(child: Expression) extends
UnaryExpression with ExpectsInp
examples = """
Examples:
> SELECT _FUNC_(map(1, 'a', 2, 'b'), map(2, 'c', 3, 'd'));
- {1:"a",2:"c",3:"d"}
+ {1:"a",2:"b",2:"c",3:"d"}
Review comment:
which spark version did you use? Duplicated entries were fixed and it shows:
```sql
spark-sql> SELECT map_concat(map(1, 'a', 2, 'b'), map(2, 'c', 3, 'd'));
{1:"a",2:"c",3:"d"}
```
and
```scala
scala> spark.sql("SELECT map_concat(map(1, 'a', 2, 'b'), map(2, 'c', 3,
'd'))").show(20, false)
+--------------------------------------------+
|map_concat(map(1, a, 2, b), map(2, c, 3, d))|
+--------------------------------------------+
|[1 -> a, 2 -> c, 3 -> d] |
+--------------------------------------------+
```
in the current master.
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