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https://issues.apache.org/jira/browse/IMPALA-8023?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on IMPALA-8023 started by Paul Rogers.
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> Fix PlannerTest to handle error lines consistently
> --------------------------------------------------
>
> Key: IMPALA-8023
> URL: https://issues.apache.org/jira/browse/IMPALA-8023
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 3.1.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Minor
>
> {{PlannerTest}} works by running a query from a .test file, generating a
> plan, and comparing that plan to a "golden" expected result. It work well for
> most cases. We can use Eclipse's diff tools to compare the actual with
> expected files, and to copy across any expected changes that result from
> changes to the planner code.
> Once case that does *not* work are exceptions. When PlannerTest indicates
> encounters failure, it emits a line such as the following to the actual
> results file:
> {noformat}
> org.apache.impala.common.NotImplementedException: Scan of table 't' in format
> 'RC_FILE' is not supported because the table has a column 's' with a complex
> type 'STRUCT<f1:STRING,f2:INT>'.
> {noformat}
> Yet, in order for the comparison to pass, the golden file must contain the
> error in the following form:
> {noformat}
> NotImplementedException: Scan of table 'functional.complextypes_fileformat'
> in format 'TEXT' is not supported because the table has a column 's' with a
> complex type 'STRUCT<f1:STRING,f2:INT>'.
> {noformat}
> Note that the actual output includes the package prefix, the expected error
> must *not* include that prefix.
> The result is that:
> * When comparing files, one must learn to ignore the differences between
> these lines: the differences are *not* the reason why a test might fail, and
> * When "rebasing" a file, one must copy all expected changes *except* the
> error lines.
> In short, this is a real nuisance. Use a filter mechanism to fix this once
> and for all.
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