[BUG] wildcard query returns nothing incorrectly when the pattern value contains capital letter

[LantaoJin]

Describe the bug

This search query works

GET opensearch_dashboards_sample_data_ecommerce/_search
{
  "from": 0,
  "size": 200,
  "query": {
    "bool": {
      "filter": [
        {
          "bool": {
            "must": [
              {
                "wildcard": {
                  "manufacturer": {
                    "value": "tigress*",
                    "boost": 1
                  }
                }
              }
            ],
            "boost": 1
          }
        }
      ],
      "boost": 1
    }
  },
  "_source": {
    "includes": [
      "manufacturer"
    ],
    "excludes": []
  }
}

But if we change the value to Tigress* (even the real text is Tigress), it return nothing:

GET opensearch_dashboards_sample_data_ecommerce/_search
{
  "from": 0,
  "size": 200,
  "query": {
    "bool": {
      "filter": [
        {
          "bool": {
            "must": [
              {
                "wildcard": {
                  "manufacturer": {
                    "value": "Tigress*",
                    "boost": 1
                  }
                }
              }
            ],
            "boost": 1
          }
        }
      ],
      "boost": 1
    }
  },
  "_source": {
    "includes": [
      "manufacturer"
    ],
    "excludes": []
  }
}

Related component

Search

To Reproduce

1. Go to playground dev tool
2. Try above two queries.

Expected behavior

Return matched docs.

Additional Details

Plugins Please list all plugins currently enabled.

Screenshots If applicable, add screenshots to help explain your problem.

Host/Environment (please complete the following information):

• OS: [e.g. iOS]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[dblock]

Want to try to write a (failing) YAML REST test?

https://github.com/opensearch-project/OpenSearch/blob/main/TESTING.md#testing-the-rest-layer

[kkewwei]

@LantaoJin can you describe manufacturer field type?

[bugmakerrrrrr]

You can use the case_insensitive parameter

GET opensearch_dashboards_sample_data_ecommerce/_search
{
  "from": 0,
  "size": 200,
  "query": {
    "bool": {
      "filter": [
        {
          "bool": {
            "must": [
              {
                "wildcard": {
                  "manufacturer": {
                    "value": "Tigress*",
                    "boost": 1,
                    "case_insensitive": true
                  }
                }
              }
            ],
            "boost": 1
          }
        }
      ],
      "boost": 1
    }
  },
  "_source": {
    "includes": [
      "manufacturer"
    ],
    "excludes": []
  }
}