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Rohan Garg c98e7c3aa3 Fix left join SQL queries with IS NOT NULL filter (#11434 ) This PR fixes the incorrect results for query : SELECT dim1, l1.k FROM foo LEFT JOIN (select k \|\| '' as k from lookup.lookyloo group by 1) l1 ON foo.dim1 = l1.k WHERE l1.k IS NOT NULL (in CalciteQueryTests) In the current code, the WHERE clause gets removed from the top of the left join and is pushed to the table foo leading to incorrect results. The fix for such a situation is done by : Converting such left joins into inner joins (since logically the mentioned left join query is equivalent to an inner join) using Calcite while maintaining that the druid execution layer can execute such inner joins. Preferring converted inner joins over original left joins in our cost model	2021-07-23 20:57:19 +05:30
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src	Fix left join SQL queries with IS NOT NULL filter (#11434 )	2021-07-23 20:57:19 +05:30
pom.xml	Bump fastutil from 8.2.3 to 8.5.4 (#11347 )	2021-06-10 07:43:18 -07:00

Fix left join SQL queries with IS NOT NULL filter (#11434 )

This PR fixes the incorrect results for query : 

SELECT dim1, l1.k FROM foo LEFT JOIN (select k || '' as k from lookup.lookyloo group by 1) l1 ON foo.dim1 = l1.k WHERE l1.k IS NOT NULL (in CalciteQueryTests)
In the current code, the WHERE clause gets removed from the top of the left join and is pushed to the table foo
leading to incorrect results.
The fix for such a situation is done by :

Converting such left joins into inner joins (since logically the mentioned left join query is equivalent to an inner join) using Calcite while maintaining that the druid execution layer can execute such inner joins.
Preferring converted inner joins over original left joins in our cost model

2021-07-23 20:57:19 +05:30

src

Fix left join SQL queries with IS NOT NULL filter (#11434 )

2021-07-23 20:57:19 +05:30

pom.xml

Bump fastutil from 8.2.3 to 8.5.4 (#11347 )

2021-06-10 07:43:18 -07:00