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### What changes were proposed in this pull request? This PR intends to add a build-in SQL function - `WIDTH_BUCKET`. It is the rework of #18323. Closes #18323 The other RDBMS references for `WIDTH_BUCKET`: - Oracle: https://docs.oracle.com/cd/B28359_01/olap.111/b28126/dml_functions_2137.htm#OLADM717 - PostgreSQL: https://www.postgresql.org/docs/current/functions-math.html - Snowflake: https://docs.snowflake.com/en/sql-reference/functions/width_bucket.html - Prestodb: https://prestodb.io/docs/current/functions/math.html - Teradata: https://docs.teradata.com/reader/kmuOwjp1zEYg98JsB8fu_A/Wa8vw69cGzoRyNULHZeudg - DB2: https://www.ibm.com/support/producthub/db2/docs/content/SSEPGG_11.5.0/com.ibm.db2.luw.sql.ref.doc/doc/r0061483.html?pos=2 ### Why are the changes needed? For better usability. ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? Added unit tests. Closes #28764 from maropu/SPARK-21117. Lead-authored-by: Takeshi Yamamuro <yamamuro@apache.org> Co-authored-by: Yuming Wang <wgyumg@gmail.com> Signed-off-by: Dongjoon Hyun <dongjoon@apache.org> |
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