Page Comparison

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any n (E1,[el],Em). This matches if any n of eventexes E₁ through E_m match. In this eventex, n must be less than or equal to m. When n is not less than m, any behaves in the same way as a variable arity and operator, checking for matches of all the subexpressions. The following example shows how any can be used:

select when any 2 (web pageview url re#customer_support.htm#,
                   phone inbound_call to re#801-649-4069#,
                   email received subject re#\[help\]#)

This eventex would match if any two of the three enclosed simple eventexes matched. The preceding eventex has the same semantics as this compound eventex:

select when (web pageview url re#customer_support.htm# and
             phone inbound_call to re#801-649-4069#)
         or
            (phone inbound_call to re#801-649-4069# and
             email received subject re#\[help\]#)
         or
            (web pageview url re#customer_support.htm# and
             email received subject re#\[help\]#)

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count n (E). This matches after n of eventex E have matched. When the count eventex matches, the counter is reset and the expression begins looking for n more of eventex E. Consider the following eventex:

select when count 3 (E)

 The arrows on the event stream in the following diagram show where this eventex would match.

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repeat n (E). This matches after n of eventex E have matched. When the repeat eventex matches, the counter is not reset, and the eventex matches using a sliding window on the event stream, always matching the last n of the eventex given in the subexpression. Consider the following eventex:

select when repeat 3 (E)

The arrows on the event stream in the following diagram show where this eventex would match.

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You can use relative time bounds with group operators, as shown in the following example:

select when any 2 (web pageview url re#customer_support.html#,
                   phone inbound_call to re#801-649-4069#,
                   email received subject re#\[help\]#)
             within 3 minutes

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