yaooqinn commented on a change in pull request #28308:
URL: https://github.com/apache/spark/pull/28308#discussion_r413608861
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File path:
sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/ExpressionDescription.java
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@@ -103,6 +103,12 @@
String arguments() default "";
String examples() default "";
String note() default "";
+ /**
+ * Valid group names are almost the same with one defined as `groupname` in
+ * `sql/functions.scala`. But, `collection_funcs` is split into
fine-grained three groups:
+ * `array_funcs`, `map_funcs`, and `json_funcs`. See `ExpressionInfo` for
the
Review comment:
Why all the csv _funcs are left behind?
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