[jira] [Commented] (CALCITE-5821) Add FORMAT_NUMBER function (enabled in Hive and Spark library)

["Julian Hyde (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-5821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17741153#comment-17741153 ] 

Julian Hyde commented on CALCITE-5821:
--------------------------------------

[~tjbanghart], Could you review this PR, since you've worked on similar formatting functions.

> Add FORMAT_NUMBER function (enabled in Hive and Spark library)
> --------------------------------------------------------------
>
>                 Key: CALCITE-5821
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5821
>             Project: Calcite
>          Issue Type: New Feature
>          Components: core
>    Affects Versions: 1.34.0
>            Reporter: Runkang He
>            Priority: Major
>
> Add FORMAT_NUMBER function (enabled in Hive and Spark library):
> FORMAT_NUMBER(expr1, expr2) - Formats the number {{expr1}} like '#,###,###.##', rounded to {{expr2}} decimal places. If {{expr2}} is 0, the result has no decimal point or fractional part. {{expr2}} also accept a user specified format. This is supposed to function like MySQL's FORMAT.
> See more details in [Hive|https://cwiki.apache.org/confluence/display/hive/languagemanual+udf#LanguageManualUDF-StringFunctions] and [Spark|https://spark.apache.org/docs/latest/api/sql/index.html#format_number] doc.



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