[jira] [Updated] (SPARK-57816) Support nanosecond-precision timestamps in date_format, to_char and to_varchar

["Max Gekk (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-57816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Max Gekk updated SPARK-57816:
-----------------------------
    Shepherd: Max Gekk

> Support nanosecond-precision timestamps in date_format, to_char and to_varchar
> ------------------------------------------------------------------------------
>
>                 Key: SPARK-57816
>                 URL: https://issues.apache.org/jira/browse/SPARK-57816
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 4.3.0
>            Reporter: Max Gekk
>            Priority: Major
>
> This sub-task is part of the umbrella SPARK-56822 (timestamps with nanosecond precision).
> h2. Problem
> {{DateFormatClass}} (datetimeExpressions.scala ~L1235-1252) has {{inputTypes = Seq(TimestampType, AnyTimeType)}} (or string) and formats {{timestamp.asInstanceOf[Long]}} micros; {{ToCharacterBuilder}} (numberFormatExpressions.scala ~L255-256) routes any {{DatetimeType}} (which includes the nanosecond types) into {{DateFormatClass}}. Nanosecond input is therefore narrowed to microseconds and the sub-microsecond digits never reach the formatter.
> h2. Goal
> Format nanosecond timestamps at full precision, honoring the pattern's fractional-second placeholders up to 9 digits, with correct NTZ (zone-independent) vs LTZ (session-zone) rendering.
> h2. Scope
> Accept {{AnyTimestampNanoType}} in {{DateFormatClass.inputTypes}}; add a {{TimestampNanosVal}} formatting path reusing the nanosecond-aware {{TimestampFormatter}} ({{formatNanos}} / {{formatWithoutTimeZoneNanos}}); wire {{to_char}} / {{to_varchar}} accordingly.
> h2. Acceptance criteria
> * {{date_format(ts_nanos, "...SSSSSSSSS")}} and {{to_char(ts_nanos, ...)}} render up to nanosecond digits; NTZ vs LTZ zone behavior matches the microsecond types.
> h2. Testing
> {{DateFunctionsSuite}} / {{DateExpressionsSuite}}; nanos golden files.
> h2. Dependencies
> None - independent (uses the resolved nanosecond-aware formatter, SPARK-57162).



--
This message was sent by Atlassian Jira
(v8.20.10#820010)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org