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https://issues.apache.org/jira/browse/CALCITE-2033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16285432#comment-16285432
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Julian Hyde commented on CALCITE-2033:
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[~dian.fu], [~ransom], Is there any progress on the reference implementation,
CALCITE-1935? If the reference implementation is not ready yet, I think it
would be sufficient to have some data tests. Then someone else could develop a
reference implementation.
If you include a script with tests (CREATE TABLE, several INSERT statements,
and SELECT statements with expected results) then I think that would be enough
to go ahead and commit this PR. You could generate the data against Oracle 12.1
or higher.
> Support followed by in pattern definition for MATCH_RECOGNIZE
> -------------------------------------------------------------
>
> Key: CALCITE-2033
> URL: https://issues.apache.org/jira/browse/CALCITE-2033
> Project: Calcite
> Issue Type: Bug
> Reporter: Dian Fu
> Assignee: Julian Hyde
>
> The [doc|https://docs.oracle.com/database/121/DWHSG/pattern.htm#DWHSG8986]
> has already defined pattern operator {{Concatenation}}. For example, pattern
> {{A B}} means that events matching pattern {{A}} and {{B}} should occur
> successively. There are also many use cases which require patterns to match
> events which not occur successively.
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