snuyanzin commented on code in PR #22842:
URL: https://github.com/apache/flink/pull/22842#discussion_r1252355890
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docs/data/sql_functions_zh.yml:
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@@ -760,7 +760,9 @@ collection:
- sql: MAP_FROM_ARRAYS(array_of_keys, array_of_values)
table: mapFromArrays(array_of_keys, array_of_values)
description: Returns a map created from an arrays of keys and values. Note
that the lengths of two arrays should be the same.
-
+ - sql: MAP_UNION(map1, map2)
+ table: map1.mapUnion(map2)
+ description: 返回一个通过合并两个图 'map1' 和 'map2'
创建的图。这两个图应该有相同的数据结构。如果有重叠的键，'map2' 的值将覆盖 'map1' 的值。如果任一图为空，则返回 null。
Review Comment:
there should be an empty line before next key which is `json`
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