Dawid Wysakowicz created FLINK-10588:
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Summary: Support reusing same variable in Pattern
Key: FLINK-10588
URL: https://issues.apache.org/jira/browse/FLINK-10588
Project: Flink
Issue Type: Sub-task
Components: CEP, Table API & SQL
Affects Versions: 1.7.0
Reporter: Dawid Wysakowicz
One should be able to use the same variable multiple times in a pattern. So we
should allow patterns like (A B A).
CEP library enforces unique names for patterns. A simple workaround to generate
artificial unique names won't work in this case because having multiple
patterns with same name puts additional constraints on AFTER MATCH SKIP as it
skips to LAST/FIRST element of elements assigned to both instances.
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