Oliver Lee created CALCITE-6301:
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Summary: 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
In [CALCITE-6219] we introduced SemanticTable, where tables that implement this
interface can define fields to be ‘must-filter’, and a query without those
filters in any of its WHERE or HAVING clauses, it will throw a validation error.
I would like to extend this functionality to support a by-pass list of fields
such that if any field from this secondary list is present in a WHERE / HAVING
clause, then the must-filter fields can be ignored and will not raise an
exception if not filtered on.
Ex.
EMP table specifies the following:
Must-filter-fields: [EMPNO, DEPTNO]
Bypass-fields: [ENAME]
SELECT * FROM EMP WHERE EMPNO = 1 and DEPTNO = 2 -> No error
SELECT * FROM EMP WHERE EMPNO = 1 -> Error
SELECT * FROM EMP WHERE EMPNO = 1 and ENAME = ’name’ -> No error
SELECT * FROM EMP WHERE ENAME = ’name’ -> No error
Again, special considerations are for handling
* Joins
* CTEs
* Subqueries
And a similar exhaustive suite of tests like the one for [CALCITE-6219] should
be employed
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