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https://issues.apache.org/jira/browse/CALCITE-5512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17684007#comment-17684007
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Julian Hyde edited comment on CALCITE-5512 at 2/3/23 7:46 PM:
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{quote}
why not support FOR SYSTEM_VERSION AS OF
{quote}
Because no one has contributed it.
{{FOR SYSTEM_VERSION AS OF}} is in the SQL standard. Reading the standard,
proposing a feature, implementing it and testing it is a lot work.
I don't think you intended it this way, but your phrasing "why not support FOR
SYSTEM_VERSION AS OF" comes over as a complaint, and that is insulting to the
many people who maintain Calcite as volunteers. If you have a question, ask it
on the dev list. If there is a missing feature, propose it as Jira feature
request, but be prepared to do the work to write at least a good specification.
was (Author: julianhyde):
Because no one has contributed it.
> why not support FOR SYSTEM_VERSION AS OF
> -----------------------------------------
>
> Key: CALCITE-5512
> URL: https://issues.apache.org/jira/browse/CALCITE-5512
> Project: Calcite
> Issue Type: Wish
> Components: core
> Reporter: YangFei
> Priority: Major
>
> hive support FOR SYSTEM_VERSION AS OF/FOR SYSTEM_TIME AS OF, why calcite
> Parser.jj not support FOR SYSTEM_VERSION AS OF
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