zhengruifeng commented on code in PR #42775:
URL: https://github.com/apache/spark/pull/42775#discussion_r1314346571
##########
python/pyspark/sql/functions.py:
##########
@@ -2385,25 +2416,54 @@ def signum(col: "ColumnOrName") -> Column:
Examples
--------
- >>> df = spark.range(1)
- >>> df.select(signum(lit(-5))).show()
- +----------+
- |SIGNUM(-5)|
- +----------+
- | -1.0|
- +----------+
-
- >>> df.select(signum(lit(6))).show()
- +---------+
- |SIGNUM(6)|
- +---------+
- | 1.0|
- +---------+
+ >>> import pyspark.sql.functions as sf
+ >>> spark.range(1).select(
+ ... sf.signum(sf.lit(-5)),
+ ... sf.signum(sf.lit(6))
+ ... ).show()
+ +----------+---------+
+ |SIGNUM(-5)|SIGNUM(6)|
+ +----------+---------+
+ | -1.0| 1.0|
+ +----------+---------+
"""
return _invoke_function_over_columns("signum", col)
-sign = signum
+@try_remote_functions
+def sign(col: "ColumnOrName") -> Column:
+ """
+ Computes the signum of the given value.
+
+ .. versionadded:: 1.4.0
+
+ .. versionchanged:: 3.4.0
Review Comment:
it should be 3.4 here, since we had `sign = signum`
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