[jira] [Assigned] (S2GRAPH-222) Support Not logical operator in WhereParser.

["DOYUNG YOON (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/S2GRAPH-222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

DOYUNG YOON reassigned S2GRAPH-222:
-----------------------------------

    Assignee: DOYUNG YOON

> Support Not logical operator in  WhereParser.
> ---------------------------------------------
>
>                 Key: S2GRAPH-222
>                 URL: https://issues.apache.org/jira/browse/S2GRAPH-222
>             Project: S2Graph
>          Issue Type: New Feature
>          Components: s2core
>            Reporter: DOYUNG YOON
>            Assignee: DOYUNG YOON
>            Priority: Minor
>
> `And/Or` operator is implemented as a logical operator, but `Not` is not implemented in WhereParser.
> This is illustrated by following examples.
> Following query works only because we added hardcoded implementation on `not in` as predicates.
> {noformat}
> query {
> 	s2graph { 
> 		User(id: 1) {
> 			id
> 			Friends(limit: 10, filter: "friend_name not in ('steamshon')")
> 		}
> 	}
> }
> {noformat}
> I believe implementing `Not` as a logical operator is more general, so below is my suggestion.
> {noformat}
> query {
> 	s2graph { 
> 		User(id: 1) {
> 			id
> 			Friends(limit: 10, filter: "NOT (friend_name in ('steamshon'))")
> 		}
> 	}
> }
> {noformat}
> In this way, we don't need to implement not case for all predicates, such as `in`, `between`, `contains`, `eq`.



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