Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7644#discussion_r35490369
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -2419,6 +2419,44 @@ object functions {
*/
def weekofyear(columnName: String): Column =
weekofyear(Column(columnName))
+ /**
+ * Gets current Unix timestamp in seconds.
+ * @group datetime_funcs
+ * @since 1.5.0
+ */
+ def from_unixtime(ut: Column): Column = FromUnixTime(Seq(ut.expr))
+
+ /**
+ * Gets current Unix timestamp in seconds.
+ * @group datetime_funcs
+ * @since 1.5.0
+ */
+ def from_unixtime(ut: Column, f: Column): Column =
FromUnixTime(Seq(ut.expr, f.expr))
+
+ /**
+ * Gets current Unix timestamp in seconds.
+ * @group datetime_funcs
+ * @since 1.5.0
+ */
+ def unix_timestamp(): Column = UnixTimestamp(Nil: Seq[Expression])
+
+ /**
+ * Converts time string in format yyyy-MM-dd HH:mm:ss to Unix timestamp
(in seconds),
+ * using the default timezone and the default locale, return null if
fail.
+ * @group datetime_funcs
+ * @since 1.5.0
+ */
+ def unix_timestamp(s: Column): Column = UnixTimestamp(Seq(s.expr))
+
+ /**
+ * Convert time string with given pattern
+ * (see
[http://docs.oracle.com/javase/tutorial/i18n/format/simpleDateFormat.html])
+ * to Unix time stamp (in seconds), return null if fail.
+ * @group datetime_funcs
+ * @since 1.5.0
+ */
+ def unix_timestamp(s: Column, p: Column): Column =
UnixTimestamp(Seq(s.expr, p.expr))
--- End diff --
p should just be a String
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