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Dian Fu commented on CALCITE-2033: ---------------------------------- I don't think {{A->B+}} is equals to {{A B+}}. Suppose we have input events such as {{A1, C, B1, B2}}, for pattern {{A -> B+}}, the output will be {{A1, B1}}, {{A1, B1, B2}}, while for pattern {{A B+}}, there will be no output at all. > 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. -- This message was sent by Atlassian JIRA (v6.4.14#64029)