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https://issues.apache.org/jira/browse/ASTERIXDB-1650?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yingyi Bu closed ASTERIXDB-1650.
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Resolution: Fixed
> The order of resolving undefined aliases
> ----------------------------------------
>
> Key: ASTERIXDB-1650
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-1650
> Project: Apache AsterixDB
> Issue Type: Bug
> Components: Translator - SQL++
> Reporter: Yingyi Bu
> Assignee: Yingyi Bu
>
> The order of resolving an undefined alias should be:
> Have different resolving mechanism for FROM/UNNEST/Quantifier and others:
>
> -- FROM/JOIN/UNNEST/Quantifier: 1. user-defined variables, 2. Datasets
> -- Others: 1. user-defined variables, 2. field-accesses, 3. Datasets
> Always resolving to a dataset as the last option can preserve query stability
> such that the query semantics will not be perturbed by adding/removing a
> dataset.
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