Don't ignore Stop words in Label search('labelText:"a"', 'labelText:"an"', 'labelText:"the"', etc.)

Issue Summary

In label search, stop words are ignored, like 'labelText:"a"' doesn't work correctly in English, CJK. 'labelText:"b"' or 'labelText:"aa"' works correctly.
This problem only happens when you search with 'labelText:"a"', 'labelText:"an", 'labelText:"is"', 'labelText:"are"'(like stop words).
So, we need to avoid using stop words in label.

However, the label is just a label, it is used as a mark or a sign, so stop words should not be ignored when the customer uses Label search.

This is reproducible on Data Center: yes

Note: Confluence Search Syntax

Limitations with exact match search
Phrases with stop words
Confluence ignores common words (stop words) — such as 'and', 'the', 'or', and 'it' — even if they are included within double quotes.

Steps to Reproduce

Step 1: Create two pages, we call "page A" and "page B".
Step 2: Add label 'a' to the page A. And, add label 'b' to the page B.
Step 3: Search with 'labelText:"a"' and 'labelText:"b"'

Expected Results

• labelText:"a"
  • The page A is on the search result.
• labelText:"b"
  • The page B is on the search result.

Actual Results

• labelText:"a"
  • The page A is not on the search result.
• labelText:"b"
  • The page B is on the search result.

Suggest Solution

In label search, don't ignore stop words, it is just label.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available

Note: Lucene query(Confluence 7.13.2) when searching

• index: English
  • labelText:"a" => '+()'

    2022-05-09 00:20:39,545 DEBUG [http-nio-8090-exec-1] [search.v2.lucene.SearcherWithTokenAction] internalPerform Query time = 1ms, Query = +((+ConstantScore(type:attachment type:comment) +ConstantScore(container.content.type:comment container.content.type:custom container.content.type:page container.content.type:blogpost container.content.type:attachment)) ConstantScore(type:userinfo type:personalspacedesc type:space type:custom type:attachment type:comment type:spacedesc type:blogpost type:page)) +(+() +(ConstantScore(+(contentPluginKey:com.atlassian.confluence.extra.team-calendars:calendar-content-type contentPluginKey:com.atlassian.confluence.extra.team-calendars:space-calendars-view-content-type) +type:custom) ConstantScore(type:page type:userinfo type:attachment type:personalspacedesc type:blogpost type:spacedesc)))
    

  • labelText:"b" => '+labelText:b'

    2022-05-09 00:25:34,725 DEBUG [http-nio-8090-exec-9] [search.v2.lucene.SearcherWithTokenAction] internalPerform Query time = 1ms, Query = +((+ConstantScore(type:comment type:attachment) +ConstantScore(container.content.type:attachment container.content.type:page container.content.type:comment container.content.type:custom container.content.type:blogpost)) ConstantScore(type:attachment type:comment type:custom type:personalspacedesc type:space type:spacedesc type:userinfo type:blogpost type:page)) +(+labelText:b +(ConstantScore(+(contentPluginKey:com.atlassian.confluence.extra.team-calendars:calendar-content-type contentPluginKey:com.atlassian.confluence.extra.team-calendars:space-calendars-view-content-type) +type:custom) ConstantScore(type:page type:attachment type:userinfo type:blogpost type:spacedesc type:personalspacedesc)))
    

  • labelText:"c"

    2022-05-09 00:26:16,866 DEBUG [http-nio-8090-exec-9] [search.v2.lucene.SearcherWithTokenAction] internalPerform Query time = 1ms, Query = +((+ConstantScore(type:attachment type:comment) +ConstantScore(container.content.type:blogpost container.content.type:comment container.content.type:custom container.content.type:page container.content.type:attachment)) ConstantScore(type:spacedesc type:userinfo type:attachment type:page type:comment type:blogpost type:personalspacedesc type:space type:custom)) +(+labelText:c +(ConstantScore(+type:custom +(contentPluginKey:com.atlassian.confluence.extra.team-calendars:calendar-content-type contentPluginKey:com.atlassian.confluence.extra.team-calendars:space-calendars-view-content-type)) ConstantScore(type:attachment type:personalspacedesc type:userinfo type:spacedesc type:page type:blogpost)))
    

• index: CJK
  • labelText:"a" => '+()'

    2022-05-09 00:17:18,033 DEBUG [http-nio-8090-exec-10] [search.v2.lucene.SearcherWithTokenAction] internalPerform Query time = 2ms, Query = +((+ConstantScore(type:attachment type:comment) +ConstantScore(container.content.type:comment container.content.type:custom container.content.type:blogpost container.content.type:attachment container.content.type:page)) ConstantScore(type:personalspacedesc type:blogpost type:userinfo type:custom type:page type:space type:attachment type:comment type:spacedesc)) +(+() +(ConstantScore(+type:custom +(contentPluginKey:com.atlassian.confluence.extra.team-calendars:calendar-content-type contentPluginKey:com.atlassian.confluence.extra.team-calendars:space-calendars-view-content-type)) ConstantScore(type:userinfo type:blogpost type:personalspacedesc type:spacedesc type:page type:attachment)))
    

  • labelText:"b" => '+labelText:b'

    2022-05-09 00:31:42,165 DEBUG [http-nio-8090-exec-8] [search.v2.lucene.SearcherWithTokenAction] internalPerform Query time = 5ms, Query = +((+ConstantScore(type:comment type:attachment) +ConstantScore(container.content.type:attachment container.content.type:page container.content.type:comment container.content.type:blogpost container.content.type:custom)) ConstantScore(type:attachment type:userinfo type:custom type:comment type:spacedesc type:personalspacedesc type:page type:blogpost type:space)) +(+labelText:b +(ConstantScore(+type:custom +(contentPluginKey:com.atlassian.confluence.extra.team-calendars:space-calendars-view-content-type contentPluginKey:com.atlassian.confluence.extra.team-calendars:calendar-content-type)) ConstantScore(type:blogpost type:attachment type:spacedesc type:personalspacedesc type:userinfo type:page)))
    

  • labelText:"c"

    2022-05-09 00:31:03,701 DEBUG [http-nio-8090-exec-9] [search.v2.lucene.SearcherWithTokenAction] internalPerform Query time = 16ms, Query = +((+ConstantScore(type:attachment type:comment) +ConstantScore(container.content.type:attachment container.content.type:page container.content.type:blogpost container.content.type:custom container.content.type:comment)) ConstantScore(type:comment type:userinfo type:attachment type:space type:spacedesc type:page type:blogpost type:custom type:personalspacedesc)) +(+labelText:c +(ConstantScore(+(contentPluginKey:com.atlassian.confluence.extra.team-calendars:space-calendars-view-content-type contentPluginKey:com.atlassian.confluence.extra.team-calendars:calendar-content-type) +type:custom) ConstantScore(type:blogpost type:personalspacedesc type:page type:userinfo type:attachment type:spacedesc)))