fix(search): Search not returning result if query text contains forward slash

[siladitya2]

We recently discovered an issue while performing Search operation on Datahub.

Issue: When a search query text contains a forward slash /, Search result does not return the expected result. As an example: We have a dataset exists on datahub with Name: databox.arn:aws:s3:::dl-odin-pro-datalake-16vmobiqqrhwn/odin/v2/autotrader-au/notification When we search with the query text databox.arn:aws:s3:::dl-odin-pro-datalake-16vmobiqqrhwn/odin/v2/autotrader-au/notification from Datahub UI or GraphQL API, the search result does not return any result.

Fix: Instead of 4 preceding backslashes "\\\\" we need to use 2 preceding backslashes "\\" while escaping Forward Slash.(forward slash / is a reserved character in elastic search)

The Problem was when we were searching with an input query string databox.arn:aws:s3:::dl-odin-pro-datalake-16vmobiqqrhwn/odin/v2/autotrader-au/notification the escapeForwardSlash method of ResolverUtils.java converted the input query string into databox.arn:aws:s3:::dl-odin-pro-datalake-16vmobiqqrhwn\\/odin\\/v2\\/autotrader-au\\/notification(added 2 backward slashes) then the query string again JSON Stringified by SimpleQueryStringBuilder while building the Search Query, so the final query string became databox.arn:aws:s3:::dl-odin-pro-datalake-16vmobiqqrhwn\\\\/odin\\\\/v2\\\\/autotrader-au\\\\/notification with additional 2 extra back ward slashes (\). Due to this, the elastic search query was failed to return any record.

Test Result with the fix:

Note: We also found that this class (datahub-frontend/app/utils/SearchUtil.java) also have the similar code https://github.com/datahub-project/datahub/blob/82e5a049ca27633bd3d74fae047ef42782c526f9/datahub-frontend/app/utils/SearchUtil.java#L23, but this is being used only from test cases. I updated the same as well in the PR.

Checklist

• [ ] The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• [ ] Links to related issues (if applicable)
• [ ] Tests for the changes have been added/updated (if applicable)
• [ ] Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.
• [ ] For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub

Summary by CodeRabbit

• Bug Fixes
  • Improved handling of forward slash escape sequences in search functionality.

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Walkthrough

The primary change modifies the escapeForwardSlash method in both SearchUtil and ResolverUtils to replace occurrences of / with \/ instead of \\\/. Corresponding test cases in SearchUtilTest were updated to reflect this change in the escape sequences for forward slashes.

Changes

File Path	Change Summary
.../app/utils/SearchUtil.java	Modified escapeForwardSlash to replace / with \\/ instead of \\\/.
.../test/utils/SearchUtilTest.java	Updated test cases to reflect changes in escaping forward slashes and asterisks.
.../graphql/resolvers/ResolverUtils.java	Modified escapeForwardSlash to replace / with \/ instead of \\\/.

Poem

In code's deep woods where slashes roam,
A tweak, a change, we now call home.
To / we add but one small line,
\/ it sings, a tune divine.
Tests will pass, the code refined,
Our paths escape, so well-aligned.
🌟🐇✨

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[siladitya2]

I think the issue here is that SimpleQueryStringBuilder is not always involved in the query. For the cases when SimpleQueryStringBuilder is not used I believe the quoting is correct. We likely need to apply your suggested change only when SimpleQueryStringBuilder is used.

@david-leifker The same problem exists with other Query Builders as well. As an example, I found the same issue for match_phrase, match_phrase_prefix, term as well. Please find below query generated for above-mentioned Query Builders for the same search input string.

{
              "match_phrase" : {
                "qualifiedName.wordGrams2" : {
                  "query" : "dl-odin-pro-datalake-16vmobiqqrhwn\\\\/odin\\\\/v2\\\\/autotrader-au\\\\/notification",
                  "slop" : 0,
                  "zero_terms_query" : "NONE",
                  "boost" : 14.400001,
                  "_name" : "qualifiedName"
                }
              }
            }

    {
              "match_phrase_prefix" : {
                "fullName.delimited" : {
                  "query" : "dl-odin-pro-datalake-16vmobiqqrhwn\\\\/odin\\\\/v2\\\\/autotrader-au\\\\/notification",
                  "slop" : 0,
                  "max_expansions" : 50,
                  "zero_terms_query" : "NONE",
                  "boost" : 4.48,
                  "_name" : "fullName"
                }
              }
            }

            {
              "term" : {
                "type.keyword" : {
                  "value" : "dl-odin-pro-datalake-16vmobiqqrhwn\\\\/odin\\\\/v2\\\\/autotrader-au\\\\/notification",
                  "case_insensitive" : true,
                  "boost" : 7.0,
                  "_name" : "type"
                }
              }
            }

So considering this, I think that the fix provided on this PR on datahub-graphql-core/src/main/java/com/linkedin/datahub/graphql/resolvers/ResolverUtils.java should be necessary to fix this issue, wdyt?

[david-leifker]

Thanks!