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Posted to issues@spark.apache.org by "YoungGyu Chun (JIRA)" <ji...@apache.org> on 2019/07/23 20:44:00 UTC
[jira] [Commented] (SPARK-27931) Accept 'on' and 'off' as input for
boolean data type
[ https://issues.apache.org/jira/browse/SPARK-27931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16891366#comment-16891366 ]
YoungGyu Chun commented on SPARK-27931:
---------------------------------------
hi [~yumwang],
are you working on this? if not I would like to do this
> Accept 'on' and 'off' as input for boolean data type
> ----------------------------------------------------
>
> Key: SPARK-27931
> URL: https://issues.apache.org/jira/browse/SPARK-27931
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Yuming Wang
> Priority: Major
>
> This ticket contains three things:
> 1. Accept 'on' and 'off' as input for boolean data type
> {code:sql}
> SELECT cast('no' as boolean) AS false;
> SELECT cast('off' as boolean) AS false;
> {code}
> 2. Accept unique prefixes thereof:
> {code:sql}
> SELECT cast('of' as boolean) AS false;
> SELECT cast('fal' as boolean) AS false;
> {code}
> 3. Trim the string when cast to boolean type
> {code:sql}
> SELECT cast(' true ' as boolean) AS true;
> SELECT cast(' FALSE' as boolean) AS true;
> {code}
> More details:
> [https://www.postgresql.org/docs/devel/datatype-boolean.html]
> [https://github.com/postgres/postgres/blob/REL_12_BETA1/src/backend/utils/adt/bool.c#L25]
> [https://github.com/postgres/postgres/commit/05a7db05826c5eb68173b6d7ef1553c19322ef48]
> Other DBs:
> http://docs.aws.amazon.com/redshift/latest/dg/r_Boolean_type.html
> https://my.vertica.com/docs/5.0/HTML/Master/2983.htm
> https://github.com/prestosql/presto/blob/b845cd66da3eb1fcece50efba83ea12bc40afbaa/presto-main/src/main/java/com/facebook/presto/type/VarcharOperators.java#L108-L138
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