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https://issues.apache.org/jira/browse/CALCITE-6301?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde resolved CALCITE-6301.
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Resolution: Fixed
Fixed in
[7ad5a39|https://github.com/apache/calcite/commit/7ad5a39a8f6701200d9ed0d6dc1febd0a507328b].
> Extend ‘Must-filter’ columns to support a conditional bypass list
> -----------------------------------------------------------------
>
> Key: CALCITE-6301
> URL: https://issues.apache.org/jira/browse/CALCITE-6301
> Project: Calcite
> Issue Type: Improvement
> Reporter: Oliver Lee
> Assignee: Oliver Lee
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.39.0
>
>
> In CALCITE-6219 we introduced {{{}interface SemanticTable{}}}. A table that
> implements this interface can define fields to be ‘must-filter’; a query that
> does not filter those fields in its {{WHERE}} or {{HAVING}} clause will throw
> a validation error.
> In this case, we allow a {{SemanticTable}} to have a list of bypass fields.
> If a query filters on any bypass field in its {{WHERE}} or {{HAVING}} clause,
> then the must-filter fields are ignored.
> For example, the {{EMP}} table specifies must-filter-fields {{EMPNO}} and
> {{{}DEPTNO{}}},
> and bypass-fields {{ENAME}} and {{{}SALARY{}}}. Consider the following
> queries on {{{}EMP{}}}.
> {code:java}
> // Valid. Query filters on both must-filter fields.
> SELECT * FROM EMP WHERE EMPNO = 1 and DEPTNO = 2;
> // Invalid. Query does not filter on must-filter field 'DEPTNO'.
> SELECT * FROM EMP WHERE EMPNO = 1;
> // Valid. Query filters on bypass field 'ENAME', and therefore does not
> // need to filter on the must-filter field 'DEPTNO'.
> SELECT * FROM EMP WHERE EMPNO = 1 and ENAME = ’name’ ;
> // Valid. Query filters on bypass field 'ENAME', and therefore does not
> // need to filter on any must-filter field.
> SELECT * FROM EMP WHERE ENAME = ’name’;
> // Valid. Query filters on bypass field 'SALARY', and therefore does not
> // need to filter on any must-filter field.
> SELECT * FROM EMP WHERE SALARY > 10;
> {code}
>
> As for must-filter fields, there are special considerations are for handling
> joins, CTEs and subqueries. We therefore include a comprehensive suite of
> tests, as we did for CALCITE-6219.
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