In my knowledge, 'Search' feature in my request screen is only available to search for 'Reference field(ticket number)' and 'Summary' field.
1. Is it right?
2. What is search rule? It seems like 'equal' not 'like' algorythm. but it is not specified. I could not find document related to 'Search' feature in My request. it support advanced search? or any other way?
Yes, you are correct. This search field does not have much in the way of documentation about it. There is actually very little that you can configure here.
Inside the customer portal, you can search for your own requests, or those shared with you. You are correct that this search is limited to the issuekey (reference) and the Summary. And again, you are correct that this search is using a full word searching, it is not using a like parameter to obtain partial word searches. Nor is it using word-stemming that Jira Core searching in the issue navigator has.
There is an existing feature request to improve the search in the customer portal over in https://jira.atlassian.com/browse/JSDSERVER-1544 I would recommend voting and watching that issue for updates.
I think search provide not only 'full word searching'.
the reason why i think is because of below test. I created test ticket which has summary name 'CS1-S2'.
when i search keyword 'S2'. definitely there is no result.
but if i search keyword '-S2'. there is a result. if this search field only provide 'full-text searching'. it must not feedback result when i search keyword '-S2'.
So i guess there is a rule with special character. my opinion is right?
So the use of the '-' character is acting as a negative here actually. Much like you can search google for terms that you want to exclude from your search results when using this minus sign. In this case when you are using a search of '-S2' it would only be expected to exclude summaries that have the word 'S2'.
Your CS1-S2 issue is getting returned here because it specifically does not have just an 'S2' term in the summary.
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