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https://issues.apache.org/jira/browse/CALCITE-1057?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maryann Xue updated CALCITE-1057:
---------------------------------
Attachment: CALCITE-1057.patch
Could you please take a look at this one, [~julianhyde]? Not sure if I should
even remove or deprecate CALC_PROGRAM and SUBQUERY_PROGRAM as they are not used
anywhere within Calcite after this change.
> Provide an interface to allow for a custom RelMetadataProvider in getting the
> standard Program
> ----------------------------------------------------------------------------------------------
>
> Key: CALCITE-1057
> URL: https://issues.apache.org/jira/browse/CALCITE-1057
> Project: Calcite
> Issue Type: Improvement
> Reporter: Maryann Xue
> Assignee: Maryann Xue
> Priority: Minor
> Attachments: CALCITE-1057.patch
>
>
> The Programs class has a static method standard() used by the default Calcite
> driver. So far Calcite-Phoenix is using the same sql prepare logic with some
> slight customization, like plugging in a set of its own rules. The static
> standard(), though, does not work properly for Phoenix since some
> sub-programs it returns are initiated with the default RelMetadataProvider
> while Phoenix needs to plug-in its own, otherwise it just could not work.
> {code}
> /** Program that converts filters and projects to {@link Calc}s. */
> public static final Program CALC_PROGRAM =
> hep(CALC_RULES, true, new DefaultRelMetadataProvider());
> /** Program that expands sub-queries. */
> public static final Program SUB_QUERY_PROGRAM =
> hep(
> ImmutableList.of((RelOptRule) SubQueryRemoveRule.FILTER,
> SubQueryRemoveRule.PROJECT,
> SubQueryRemoveRule.JOIN), true, new
> DefaultRelMetadataProvider());
> {code}
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