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https://issues.apache.org/jira/browse/IMPALA-8106?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Rogers reassigned IMPALA-8106:
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Assignee: (was: Paul Rogers)
> Cleanup of literal expression nodes
> -----------------------------------
>
> Key: IMPALA-8106
> URL: https://issues.apache.org/jira/browse/IMPALA-8106
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 3.1.0
> Reporter: Paul Rogers
> Priority: Minor
>
> IMPALA-7902 cleaned up numeric literals to fix confusing cast logic, to avoid
> the need to analyze a literal, and so on. This ticket proposes to do the same
> for the other literal expressions which, as a whole, need less work than the
> numeric literal did. In particular:
> * Remove the need to analyze any literal expression.
> * Clean up the cumbersome way that code creates and analyzes literals.
> * Much code uses an awkward sequence of steps to force a constant expression
> to s specific type. Streamline this code.
> * The constant expression evaluator is confused about the return SQL type. Is
> it the type of the original expression (as often required in statements) or
> the simplest type (as required by catalog code such as partition keys.)
> Create two distinct methods: one for each case.
> This work, in turn, is part of the ongoing effort to merge expression
> rewrites into a single-pass analysis phase in order to more cleanly introduce
> additional rewrite rules.
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