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https://issues.apache.org/jira/browse/ARROW-6666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16947343#comment-16947343
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Andy Grove commented on ARROW-6666:
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Yes, exactly that ... there are a few places where we can use string literals
(and we can make separate stories) ...
Projection: SELECT 'hello' FROM test ... not too useful, but valid
Selection: SELECT c1 FROM test WHERE c1 = 'Hello' OR c1 < 'Goodbye'
Aggregate: SELECT COUNT(name), MIN(name), MAX(name) FROM test
> [Rust] [DataFusion] Implement string literal expression
> -------------------------------------------------------
>
> Key: ARROW-6666
> URL: https://issues.apache.org/jira/browse/ARROW-6666
> Project: Apache Arrow
> Issue Type: Sub-task
> Components: Rust, Rust - DataFusion
> Reporter: Andy Grove
> Priority: Major
> Labels: beginner
> Fix For: 1.0.0
>
>
> Implement string literal expression in the new physical query plan. It is
> already implemented in the code that executed directly from the logical plan
> so it should largely be a copy and paste exercise.
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