[jira] [Updated] (PHOENIX-945) Support correlated subqueries in comparison without ANY/SOME/ALL

["Maryann Xue (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PHOENIX-945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Maryann Xue updated PHOENIX-945:
--------------------------------
    Summary: Support correlated subqueries in comparison without ANY/SOME/ALL  (was: Support correlated subqueries)

> Support correlated subqueries in comparison without ANY/SOME/ALL
> ----------------------------------------------------------------
>
>                 Key: PHOENIX-945
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-945
>             Project: Phoenix
>          Issue Type: Sub-task
>    Affects Versions: 3.0.0, 4.0.0, 5.0.0
>            Reporter: Maryann Xue
>            Assignee: Maryann Xue
>             Fix For: 3.0.0, 4.0.0, 5.0.0
>
>   Original Estimate: 336h
>  Remaining Estimate: 336h
>
> Example:
>  SELECT employee_number, name
>    FROM employees AS Bob
>    WHERE salary > (
>      SELECT AVG(salary)
>        FROM employees
>        WHERE department = Bob.department);
> Basically we can optimize these queries into join queries, like:
>  SELECT employees.employee_number, employees.name
>    FROM employees INNER JOIN
>      (SELECT department, AVG(salary) AS department_average
>        FROM employees
>        GROUP BY department) AS temp ON employees.department = temp.department
>    WHERE employees.salary > temp.department_average;



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