Hi Adrien
suppose that conjunction query like (term1 AND term2 AND term3) ,if
the term1 does not exist ,and then the loop execution may cause
unnecessary overhead.(sorry I have not yet find out whether there is any
filter work before the doNext()..
Best Regard
Adrien Grand <jpou...@gmail.com> 于2023年10月1日周日 22:30写道：
> Hello,
>
> This change would be correct, but it would only save work when the
> conjunction is exhausted, and add overhead otherwise?
>
> Le sam. 30 sept. 2023, 16:20, YouPeng Yang <yypvsxf19870...@gmail.com> a
> écrit :
>
>> Hi
>> I am reading the code of class ConjunctionDISI .and about the method
>> nextDoc , Suppose that the sub-disi is emtpy in the lead1.lead2,should
>> there be that it can return immediately when the input doc==NO_MORE_DOCS?
>>
>>
>> private int doNext(int doc) throws IOException {
>> advanceHead:
>> for (; ; ) {
>> assert doc == lead1.docID();
>> //assumpt doc==NO_MORE_DOCS ,it return
>> if(doc==NO_MORE_DOCS){
>> return NO_MORE_DOCS;
>> }
>> // find agreement between the two iterators with the lower costs
>> // we special case them because they do not need the
>> // 'other.docID() < doc' check that the 'others' iterators need
>> final int next2 = lead2.advance(doc);
>> if (next2 != doc) {
>> doc = lead1.advance(next2);
>> if(doc==NO_MORE_DOCS){
>> return NO_MORE_DOCS;
>> }
>> if (next2 != doc) {
>> continue;
>> }
>> }
>> ..left omited...
>> }
>>
>
