VasShabu commented on code in PR #28970:
URL: https://github.com/apache/flink/pull/28970#discussion_r3933092637
##########
docs/data/sql_functions.yml:
##########
@@ -925,6 +925,23 @@ collection:
- sql: MAP_ENTRIES(map)
table: MAP.mapEntries()
description: Returns an array of all entries in the given map. No order
guaranteed.
+ - sql: MAP_CONTAINS_KEY(map, key)
+ table: MAP.mapContainsKey(key)
+ description: |
+ Returns TRUE if the given key exists in the map, FALSE otherwise.
Returns NULL if the map is
+ NULL.
+
+ If the search key is NULL, the function returns TRUE when the map
contains a NULL key.
+ The given key is cast implicitly to the map's key type where Flink's
implicit casting rules
+ allow it; otherwise the call fails validation.
Review Comment:
added example to all docs.
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