ambition119 opened a new pull request #7071: Complex Event Processing (CEP) SQL 
Realization
URL: https://github.com/apache/flink/pull/7071
 
 
   Complex Event Processing (CEP) SQL Realization is a new feature. Use 
statement :
   ```sql
   SELECT [ ALL | DISTINCT ]
   { * | projectItem [, projectItem ]* }
   FROM tableExpression
   [MATCH_RECOGNIZE (
   [PARTITION BY {partitionItem [, partitionItem]*}]
   [ORDER BY {orderItem [, orderItem]*}]
   [MEASURES {measureItem AS col [, measureItem AS col]*}]
   [ONE ROW PER MATCH|ALL ROWS PER MATCH|ONE ROW PER MATCH WITH TIMEOUT 
ROWS|ALL ROWS PER MATCH WITH TIMEOUT ROWS]
   [AFTER MATCH SKIP]
   PATTERN (patternVariable[quantifier] [ patternVariable[quantifier]]*) WITHIN 
intervalExpression
   DEFINE {patternVariable AS patternDefinationExpression [, patternVariable AS 
patternDefinationExpression]*}
   )];
   ```
   I cann't create new pull request, sorry

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