yaooqinn commented on a change in pull request #27099: [SPARK-30335][SQL][DOCS]
Add a note first and last can be non-deterministic in SQL function docs as well
URL: https://github.com/apache/spark/pull/27099#discussion_r363282781
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala
##########
@@ -43,6 +43,10 @@ import org.apache.spark.sql.types._
> SELECT _FUNC_(col, true) FROM VALUES (NULL), (5), (20) AS tab(col);
5
""",
+ note = """
+ The function is non-deterministic because its results depends on order of
rows which
Review comment:
depend on the order of rows
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