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https://issues.apache.org/jira/browse/SIS-423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16539853#comment-16539853
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Martin Desruisseaux commented on SIS-423:
-----------------------------------------
{{QueriedFeatureSet}} removed in commit
892d108b024147709888bed655f2a7bc5beb8d86. We can take it back from history
later as a starting point for working on this issue.
> Query DataStore using scripting languages
> -----------------------------------------
>
> Key: SIS-423
> URL: https://issues.apache.org/jira/browse/SIS-423
> Project: Spatial Information Systems
> Issue Type: Improvement
> Components: Storage
> Reporter: Martin Desruisseaux
> Priority: Major
>
> As of Apache SIS 1.0, the {{Feature}} instances read by a {{DataStore}} can
> be filtered by a call to {{FeatureSet.subset(Query)}}. The only {{Query}}
> implementation currently provided is
> {{org.apache.sis.internal.storage.query.SimpleQuery}} (that class may move to
> public API later if experience shows that its API is okay). We should
> consider adding another subclass, something like {{ScriptedQuery}}, for
> adding the capability to specify the query in a scripting language. The list
> of supported languages would be provided by the {{DataStore}}. This list may
> include {{SQL}} and {{CQL}}. An empty list of supported languages would mean
> that the {{Query}} argument can not be an instance of {{ScriptedQuery}}.
> The {{SQLStore}} class defined in {{org.apache.sis.storage.sql}} is an
> obvious example of {{DataStore}} supporting {{ScriptedQuery}}, with SQL as
> the supported language. But we could also define a separated module using
> Apache Calcite for adding SQL support to any {{DataStore}} that do not
> natively support SQL. When this optional module is present on the classpath,
> SQL would be automatically be added to the list of supported languages for
> {{DataStore}}.
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