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https://issues.apache.org/jira/browse/CALCITE-1167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15211588#comment-15211588
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Serge Harnyk commented on CALCITE-1167:
---------------------------------------
>From SQL 1999
http://web.cecs.pdx.edu/~len/sql1999.pdf, 8.12 <overlaps predicate>, page
316-317, General rules:
3) If D1 is the null value or if E1<D1, then let S1=E1 and let T1=D1.
Otherwise, let S1=D1 and let T1=E1.
> OVERLAPS doesnt swap operands
> -----------------------------
>
> Key: CALCITE-1167
> URL: https://issues.apache.org/jira/browse/CALCITE-1167
> Project: Calcite
> Issue Type: Bug
> Reporter: Serge Harnyk
> Assignee: Julian Hyde
> Priority: Minor
>
> If second date in interval is earlier than first OVERLAPS doesnt swap them.
> Example:
> select 1 from "TEST"."tdt" where (date '1999-12-01' , date '2001-12-31' )
> overlaps ( date '2001-01-01' , date '2002-11-11' );
> +------------+
> | EXPR$0 |
> +------------+
> | 1 |
> | 1 |
> | 1 |
> | 1 |
> +------------+
> select 1 from "TEST"."tdt" where ( date '2001-12-31', date '1999-12-01' )
> overlaps ( date '2001-01-01' , date '2002-11-11' );
> +------------+
> | EXPR$0 |
> +------------+
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