[jira] [Created] (CALCITE-7767) Re-enable disabled in RelMetadataTest with updated selectivity expectations

["Diveyam Mishra (Jira)" <ji...@apache.org>]

Diveyam Mishra created CALCITE-7767:
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             Summary: Re-enable disabled in RelMetadataTest with updated selectivity expectations
                 Key: CALCITE-7767
                 URL: https://issues.apache.org/jira/browse/CALCITE-7767
             Project: Calcite
          Issue Type: Task
          Components: tests
            Reporter: Diveyam Mishra
            Assignee: Diveyam Mishra


h4. Problem

In {{{}RelMetadataTest.java{}}}, five tests verifying {{RelMetadataQuery#getPercentageOriginalRows}} have been disabled since the initial Optiq/Eigenbase migration:
 * {{testPercentageOriginalRowsTwoFilters}}
 * {{testPercentageOriginalRowsRedundantFilter}}
 * {{testPercentageOriginalRowsJoinTwoFilters}}
 * {{testPercentageOriginalRowsUnionLittleFilter}}
 * {{testPercentageOriginalRowsUnionBigFilter}}

h4. Cause

These legacy tests were written under early Optiq assumptions where all equality predicates were assigned a fixed default selectivity ({{{}DEFAULT_EQUAL_SELECTIVITY = 0.15{}}}).

As Calcite's metadata framework evolved to incorporate schema knowledge (specifically identifying {{deptno}} as a unique primary key on table {{{}dept{}}}, yielding an exact selectivity of {{{}1.0 / DEPT_SIZE = 0.25{}}}), the hardcoded assertions expecting {{0.15}} and {{0.0225}} failed. Rather than updating the formulas to reflect Calcite's improved metadata formulas, {{@Disabled}} was added. 



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