MaxGekk commented on a change in pull request #27438: [MINOR][SQL][DOCS][2.4]
Fix the descriptions of `to_timestamp` and `ParseToTimestamp`
URL: https://github.com/apache/spark/pull/27438#discussion_r373960161
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File path: sql/core/src/main/scala/org/apache/spark/sql/functions.scala
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@@ -2949,10 +2949,10 @@ object functions {
def unix_timestamp(s: Column, p: String): Column = withExpr {
UnixTimestamp(s.expr, Literal(p)) }
/**
- * Converts to a timestamp by casting rules to `TimestampType`.
+ * Converts to a timestamp by casting rules to `TimestampType` in the
seconds precision.
*
* @param s A date, timestamp or string. If a string, the data must be in a
format that can be
- * cast to a timestamp, such as `yyyy-MM-dd` or `yyyy-MM-dd
HH:mm:ss.SSSS`
+ * cast to a timestamp, such as `yyyy-MM-dd` or `yyyy-MM-dd
HH:mm:ss`
Review comment:
Right, it works due to your changes
https://github.com/apache/spark/pull/17901 . When the `format` parameter is
omitted, `to_timestamp` uses another parsing mechanism via
`DateTimeUtils.stringToTimestamp` and the result is not truncated to seconds as
we do when the `format` is provided. Weird behavior. :-(
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