[jira] [Commented] (IGNITE-13022) Calcite integration. Merge index conditions for the same field.

["Roman Kondakov (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-13022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17116140#comment-17116140 ] 

Roman Kondakov commented on IGNITE-13022:
-----------------------------------------

We also need to check that it works for  {{BETWEEN}} clause.  As well as it works in the presence of filters over several tables.

> Calcite integration. Merge index conditions for the same field.
> ---------------------------------------------------------------
>
>                 Key: IGNITE-13022
>                 URL: https://issues.apache.org/jira/browse/IGNITE-13022
>             Project: Ignite
>          Issue Type: Improvement
>          Components: sql
>            Reporter: Roman Kondakov
>            Priority: Major
>
> Index scans should be able to merge index conditions. For example query
> {code:java}
> SELECT * FROM tbl WHERE a<5 AND a<10
> {code}
> should be reduced to
>  
> {code:java}
> SELECT * FROM tbl WHERE a<5
> {code}
> Parameters should be handled in a more tricky way:
> {code:java}
> SELECT * FROM tbl WHERE a<?1 AND a<?2
> {code}
> can be rewritten as
> {code:java}
> SELECT * FROM tbl WHERE a<MIN(?1, ?2){code}
> where the expression {{MIN(?1, ?2)}} should be evaluated right before the execution when parameters are known.
>  
>  



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