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https://issues.apache.org/jira/browse/IGNITE-19997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Iurii Gerzhedovich updated IGNITE-19997:
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Epic Link: IGNITE-21956
> Sql. Enhancing test coverage of type coercion
> ---------------------------------------------
>
> Key: IGNITE-19997
> URL: https://issues.apache.org/jira/browse/IGNITE-19997
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Reporter: Konstantin Orlov
> Priority: Major
> Labels: ignite-3
>
> Currently, we have neither an understanding of how type coercion impacts the
> system, nor decent test coverage. As a result, trying to fix one part causes
> the other to break (see IGNITE-19128 --> IGNITE-19615 --> IGNITE-19976).
> To improve the situation, let us perform the following steps:
> * first, it is necessary to cover the current behavior of planner with an
> exhaustive set of tests:. Here, we need to cover following cases
> ** coercion for set operations like UNION, INTERSECT and EXCEPT
> ** coercion for binary comparison and arithmetic
> ** coercion for IN operator
> ** coercion for CASE operator
> ** coercion for function arguments
> ** coercion of source for INSERT, UPDATE and MERGE operators
> ** etc (did I miss something?)
> * then, we need to cover execution by the similar tests to make sure
> coercion and execution are aligned
> * finally, we should revise coercion rules to remove unnecessary casts
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