Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/5015#discussion_r151408469
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/validate/FunctionCatalog.scala
---
@@ -333,6 +337,10 @@ class BasicOperatorTable extends
ReflectiveSqlOperatorTable {
SqlStdOperatorTable.ITEM,
SqlStdOperatorTable.CARDINALITY,
SqlStdOperatorTable.ELEMENT,
+ // MAP OPERATORS
+ SqlStdOperatorTable.MAP_VALUE_CONSTRUCTOR,
+ SqlStdOperatorTable.ITEM,
--- End diff --
ITEM and CARDINALITY are already present.
---