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https://issues.apache.org/jira/browse/METAMODEL-178?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kasper Sørensen resolved METAMODEL-178.
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Resolution: Fixed
Fix Version/s: 4.4.0
> Make FunctionType an interface to enable addition of non-aggregate/scalar
> functions
> -----------------------------------------------------------------------------------
>
> Key: METAMODEL-178
> URL: https://issues.apache.org/jira/browse/METAMODEL-178
> Project: Apache MetaModel
> Issue Type: Improvement
> Reporter: Kasper Sørensen
> Assignee: Alberto Rodriguez
> Fix For: 4.4.0
>
>
> To unlock the addition of scalar functions such as described by METAMODEL-165
> we need to change FunctionType to not be an enum but to be an interface with
> a sub-interface called AggregateFunction. Another subinterface called
> ScalarFunction could then denote functions to be applied on each record (as
> opposed to aggregate functions which are applied on a set of values).
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