5cebe587c7
### What changes were proposed in this pull request? Add 3 interval output types which are named as `SQL_STANDARD`, `ISO_8601`, `MULTI_UNITS`. And we add a new conf `spark.sql.dialect.intervalOutputStyle` for this. The `MULTI_UNITS` style displays the interval values in the former behavior and it is the default. The newly added `SQL_STANDARD`, `ISO_8601` styles can be found in the following table. Style | conf | Year-Month Interval | Day-Time Interval | Mixed Interval -- | -- | -- | -- | -- Format With Time Unit Designators | MULTI_UNITS | 1 year 2 mons | 1 days 2 hours 3 minutes 4.123456 seconds | interval 1 days 2 hours 3 minutes 4.123456 seconds SQL STANDARD | SQL_STANDARD | 1-2 | 3 4:05:06 | -1-2 3 -4:05:06 ISO8601 Basic Format| ISO_8601| P1Y2M| P3DT4H5M6S|P-1Y-2M3D-4H-5M-6S ### Why are the changes needed? for ANSI SQL support ### Does this PR introduce any user-facing change? yes，interval out now has 3 output styles ### How was this patch tested? add new unit tests cc cloud-fan maropu MaxGekk HyukjinKwon thanks. Closes #26418 from yaooqinn/SPARK-29783. Authored-by: Kent Yao <yaooqinn@hotmail.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com> |
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