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https://issues.apache.org/jira/browse/LENS-69?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14287122#comment-14287122
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Jaideep Dhok commented on LENS-69:
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Expressions could be measures or dimensions, but they can also exist on their
own.
Example let's say we have a market fact table with buy and sale transactions of
products. An expression could be profitability_indicator which can be a case
statement on SUM(sell_price) - SUM(buy_price). In this case this is neither a
measure, nor a dimension.
Is the main intent to allow distinct values and min, max etc? Could that be
done at AbstractCubeColumn level based on type? We already ensure an expression
has a type.
> Cube expressions should be classified as measure or dimension
> -------------------------------------------------------------
>
> Key: LENS-69
> URL: https://issues.apache.org/jira/browse/LENS-69
> Project: Apache Lens
> Issue Type: Improvement
> Components: cube
> Reporter: Amareshwari Sriramadasu
>
> We have expressions sitting separate from measure or dimension. But they
> should be actually a measure or dimension. This would also allow to give more
> attributes defined for the expressions for example possible min or max
> values, or possible distinct values, format string and etc.
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