[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

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Screenshots
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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": []
  }
}