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[SPARK-29020][FOLLOWUP][SQL] Update description of array_sort function #27404

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[SPARK-29020][FOLLOWUP][SQL] Update description of array_sort function #27404

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7c16827
update description
kiszk Jan 30, 2020
232d560
address review comment
kiszk Jan 30, 2020
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10 changes: 5 additions & 5 deletions ...alyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/higherOrderFunctions.scala
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Expand Up @@ -291,11 +291,11 @@ case class ArrayTransform(
*/
// scalastyle:off line.size.limit
@ExpressionDescription(
usage = """_FUNC_(expr, func) - Sorts the input array in ascending order. The elements of the
input array must be orderable. Null elements will be placed at the end of the returned
array. Since 3.0.0 this function also sorts and returns the array based on the given
comparator function. The comparator will take two arguments
representing two elements of the array.
usage = """_FUNC_(expr, func) - Sorts the input array. If func is omitted, sort
in ascending order. The elements of the input array must be orderable. Null elements
will be placed at the end of the returned array. Since 3.0.0 this function also sorts
and returns the array based on the given comparator function. The comparator will
take two arguments representing two elements of the array.
It returns -1, 0, or 1 as the first element is less than, equal to, or greater
than the second element. If the comparator function returns other
values (including null), the function will fail and raise an error.
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