[jira] [Resolved] (CALCITE-1570) Add MATCH_RECOGNIZE operator, for event pattern-matching

["Zhiqiang He (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-1570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhiqiang He resolved CALCITE-1570.
----------------------------------
       Resolution: Resolved
    Fix Version/s: 1.13.0

> Add MATCH_RECOGNIZE operator, for event pattern-matching
> --------------------------------------------------------
>
>                 Key: CALCITE-1570
>                 URL: https://issues.apache.org/jira/browse/CALCITE-1570
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Julian Hyde
>            Assignee: Zhiqiang He
>             Fix For: 1.13.0
>
>
> Add the MATCH_RECOGNIZE operator, for event pattern-matching. Oracle [introduced this in 11i|https://oracle-base.com/articles/12c/pattern-matching-in-oracle-database-12cr1] (for tables) and Esper [implemented it|http://www.espertech.com/esper/release-5.1.0/esper-reference/html/match-recognize.html] (for streams of events). 
> It would be most useful for streaming SQL but it makes sense in non-streaming SQL too (and of course it's good to be able to run streaming queries on historic data).
> Here is an example from [oracle-base|https://oracle-base.com/articles/12c/pattern-matching-in-oracle-database-12cr1]:
> {code}
> SELECT *
> FROM   sales_history MATCH_RECOGNIZE (
>          PARTITION BY product
>          ORDER BY tstamp
>          MEASURES  STRT.tstamp AS start_tstamp,
>                    FINAL LAST(UP.tstamp) AS peak_tstamp,
>                    MATCH_NUMBER() AS mno,
>                    CLASSIFIER() AS cls
>          ALL ROWS PER MATCH
>          AFTER MATCH SKIP TO LAST DOWN
>          PATTERN (STRT UP+ DOWN{1} UP+)
>          DEFINE
>            UP AS UP.units_sold > PREV(UP.units_sold),
>            DOWN AS DOWN.units_sold < PREV(DOWN.units_sold)
>        ) MR
> ORDER BY MR.product, MR.tstamp;
> {code}



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