Problems executing boolean queries involving NOT clauses

[Sundeep T]

Hi,

I am using solr 6.3 version.

We are seeing issues involving NOT clauses when they are paired in boolean 
expressions. The issues specifically occur when the “NOT” clause is surrounded 
by paratheses.

For example, the following solr query does not return any results -

(timestamp:[* TO "2017-08-17T07:12:55.807Z"]) AND (-text:"Daemon”)

But if I remove the parantheses around the “NOT” clause for text param it 
returns expected results. Like, the below query works as expected -

(timestamp:[* TO "2017-08-17T07:12:55.807Z"]) AND -text:”Daemon”

This problem seems to happen only for boolean expression queries. If i give a 
singular query like below involving NOT with parantheses, it still works  -
(-text:"Daemon”)

I see that the parantheses around the expression is added in SQLVisitor class 
in these lines. I tried removing the parantheses for NOT case and the code 
works.

            case NOT_EQUAL:
                buf.append('-').append(field).append(":").append(value);
                return null;

Any ideas what’s going on here and why parantheses are causing an issue?

Thanks
Sundeep