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https://issues.apache.org/jira/browse/DRILL-4399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208275#comment-15208275
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Serge Harnyk commented on DRILL-4399:
-------------------------------------
Query before optimisation:
select 1 from tdt where (date '1999-12-01' , date '2001-12-31' )
overlaps ( date '2001-01-01' , tdt.cdt ) and rnum=0
Query passed to jdbc:
SELECT 1 AS "EXPR$0" FROM "tdt"
WHERE DATE '2001-12-31' >= DATE '2001-01-01' AND "cdt" >= DATE '1999-12-01' AND
"rnum" = 0
Query before optimisation:
select 1 from tdt where ( date '2001-12-31', date '1999-12-01' )
overlaps ( date '2001-01-01' , tdt.cdt ) and rnum=0
Query passed to jdbc:
SELECT 1 AS "EXPR$0" FROM "public"."tdt"
WHERE DATE '1999-12-01' >= DATE '2001-01-01' AND "cdt" >= DATE '2001-12-31' AND
"rnum" = 0
When Drill meets OVERLAPS function it transform it to (StartA <= EndB) and
(EndA >= StartB) condition.
PostgreSQL add more logic -
http://www.postgresql.org/docs/9.3/static/functions-datetime.html
"When a pair of values is provided, either the start or the end can be written
first; OVERLAPS automatically takes the earlier value of the pair as the start."
> query using OVERLAPS function executes and returns 0 rows
> ---------------------------------------------------------
>
> Key: DRILL-4399
> URL: https://issues.apache.org/jira/browse/DRILL-4399
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - JDBC
> Affects Versions: 1.5.0
> Reporter: N Campbell
> Assignee: Serge Harnyk
>
> Doc set makes not mention of this, but parses and executes
> select 1 from postgres.public.tdt where (date '1999-12-01' , date
> '2001-12-31' ) overlaps ( date '2001-01-01' , tdt.cdt ) and rnum=0
> This query executed by Postgres would return 1 row
> create table TDT ( RNUM integer not null , CDT date ) ;
> comment on table TDT is 'This describes table TDT.';
> grant select on table TDT to public;
> insert into TDT(RNUM, CDT) values ( 0, NULL);
> insert into TDT(RNUM, CDT) values ( 1, DATE '1996-01-01');
> insert into TDT(RNUM, CDT) values ( 2, DATE '2000-01-01');
> insert into TDT(RNUM, CDT) values ( 3, DATE '2000-12-31');
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