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From Dawid Weiss <dawid.we...@gmail.com>
Subject Re: Query parser and default operator
Date Wed, 09 Nov 2016 17:10:54 GMT
Which Lucene version and which query parser is this? Can you provide a
test case/ code sample?
I just tried with StandardQueryParser and for:

        sqp.setDefaultOperator(StandardQueryConfigHandler.Operator.AND);
        dump(sqp.parse("foo AND bar OR baz", "field_a"));
        sqp.setDefaultOperator(StandardQueryConfigHandler.Operator.OR);
        dump(sqp.parse("foo AND bar OR baz", "field_a"));

I get the same result:

BooleanQuery: +field_a:foo +field_a:bar field_a:baz

Dawid

On Wed, Nov 9, 2016 at 6:04 PM, Pawel Rog <ppp.pawelrog@gmail.com> wrote:
> Hi Eric,
> Thank you for your email.
> I understand that Lucene queries are not in boolean logic. My point is only
> that I would expect identical Lucene queries build from the same input
> string. My intuition says that default operator should not matter in 2
> examples I presented in previous email.
>
> --
> Paweł Róg
>
> On Wed, Nov 9, 2016 at 4:32 PM, Erick Erickson <erickerickson@gmail.com>
> wrote:
>
>> Lucene queries aren't boolean logic. You can simulate boolean logic by
>> explicitly parenthesizing, here's an excellent blog on this:
>>
>> https://lucidworks.com/blog/why-not-and-or-and-not/
>>
>> Best,
>> Erick
>>
>> On Wed, Nov 9, 2016 at 1:37 AM, Pawel Rog <ppp.pawelrog@gmail.com> wrote:
>> > Hello ,
>> > I have a query `foo AND bar OR baz`. When I use "AND" as a default
>> operator
>> > this is the resulting Lucene  query:
>> >
>> > `+test:foo test:bar test:baz`
>> >
>> > When I use "OR" this is the resulting query
>> >
>> > `+test:foo +test:bar test:baz`
>> >
>> >
>> > I expected these two return exactly the same Lucene query because I used
>> > operator explicitly. I thought that the default operator is used only
>> when
>> > operator is not explicitly mentioned in the query. Am I missing something
>> > or this is not expected behavior (bug)?
>> >
>> > --
>> > Paweł Róg
>>
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