[jira] [Assigned] (SPARK-32721) Simplify if clauses with null and boolean

2020-08-31 Thread DB Tsai (Jira) 


 [ 
https://issues.apache.org/jira/browse/SPARK-32721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

DB Tsai reassigned SPARK-32721:
---

Assignee: Chao Sun

> Simplify if clauses with null and boolean
> -
>
> Key: SPARK-32721
> URL: https://issues.apache.org/jira/browse/SPARK-32721
> Project: Spark
>  Issue Type: Improvement
>  Components: SQL
>Affects Versions: 3.0.0
>Reporter: Chao Sun
>Assignee: Chao Sun
>Priority: Major
>
> The following if clause:
> {code:sql}
> if(p, null, false) 
> {code}
> can be simplified to:
> {code:sql}
> and(p, null)
> {code}
> And similarly, the following clause:
> {code:sql}
> if(p, null, true)
> {code}
> can be simplified to:
> {code:sql}
> or(not(p), null)
> {code}
> iff predicate {{p}} is deterministic, i.e., can be evaluated to either true 
> or false, but not null.
> {{and}} and {{or}} clauses are more optimization friendly. For instance, by 
> converting {{if(col > 42, null, false)}} to {{and(col > 42, null)}}, we can 
> potentially push the filter {{col > 42}} down to data sources to avoid 
> unnecessary IO.



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[jira] [Assigned] (SPARK-32721) Simplify if clauses with null and boolean

2020-08-27 Thread Apache Spark (Jira) 


 [ 
https://issues.apache.org/jira/browse/SPARK-32721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Apache Spark reassigned SPARK-32721:


Assignee: Apache Spark

> Simplify if clauses with null and boolean
> -
>
> Key: SPARK-32721
> URL: https://issues.apache.org/jira/browse/SPARK-32721
> Project: Spark
>  Issue Type: Improvement
>  Components: SQL
>Affects Versions: 3.0.0
>Reporter: Chao Sun
>Assignee: Apache Spark
>Priority: Major
>
> The following if clause:
> {code:sql}
> if(p, null, false) 
> {code}
> can be simplified to:
> {code:sql}
> and(p, null)
> {code}
> And similarly, the following clause:
> {code:sql}
> if(p, null, true)
> {code}
> can be simplified to:
> {code:sql}
> or(p, null)
> {code}



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[jira] [Assigned] (SPARK-32721) Simplify if clauses with null and boolean

2020-08-27 Thread Apache Spark (Jira) 


 [ 
https://issues.apache.org/jira/browse/SPARK-32721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Apache Spark reassigned SPARK-32721:


Assignee: (was: Apache Spark)

> Simplify if clauses with null and boolean
> -
>
> Key: SPARK-32721
> URL: https://issues.apache.org/jira/browse/SPARK-32721
> Project: Spark
>  Issue Type: Improvement
>  Components: SQL
>Affects Versions: 3.0.0
>Reporter: Chao Sun
>Priority: Major
>
> The following if clause:
> {code:sql}
> if(p, null, false) 
> {code}
> can be simplified to:
> {code:sql}
> and(p, null)
> {code}
> And similarly, the following clause:
> {code:sql}
> if(p, null, true)
> {code}
> can be simplified to:
> {code:sql}
> or(p, null)
> {code}



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