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https://issues.apache.org/jira/browse/CASSANDRA-11067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15131552#comment-15131552
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Pavel Yaskevich commented on CASSANDRA-11067:
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The problem which that approach is some of the tokenization doesn't cause 
changes to internal structure of the text so requiring always to use "=" is not 
aways adequate. I would say we need to let indexing implementations decide what 
ops to support and how to support them, because "=" for tokenized/stemmed 
results is a norm.

> Improve SASI syntax
> -------------------
>
>                 Key: CASSANDRA-11067
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11067
>             Project: Cassandra
>          Issue Type: Task
>          Components: CQL
>            Reporter: Jonathan Ellis
>            Assignee: Pavel Yaskevich
>             Fix For: 3.4
>
>
> I think everyone agrees that a LIKE operator would be ideal, but that's 
> probably not in scope for an initial 3.4 release.
> Still, I'm uncomfortable with the initial approach of overloading = to mean 
> "satisfies index expression."  The problem is that it will be very difficult 
> to back out of this behavior once people are using it.
> I propose adding a new operator in the interim instead.  Call it MATCHES, 
> maybe.  With the exact same behavior that SASI currently exposes, just with a 
> separate operator rather than being rolled into =.



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