elasticsearch - 带有规范化器的 ElasticSearch 关键字文件不适用于通配符查询

Question

    "settings":{
      "analysis": {
        "char_filter": {
            "char_filter": {
                "pattern": "[^A-Za-z0-9\u00C0-\u00FF]",
                "type": "pattern_replace",
                "replacement": ""
            }
        },
        "normalizer": {
            "normalizer": {
              "type": "custom",
              "char_filter": "char_filter",
              "filter": ["trim", "lowercase", "asciifolding"]
            }
        }
      }
    }
}

映射：

{
  "properties": {
    "id":{ "type": "integer" },
    "a":{"type":"keyword", "normalizer": "normalizer"},
    "b":{"type":"keyword"}
  }
}

文件：

{
    "id":1,
    "a":"one",
    "b":"one"
}

{
    "id":2,
    "a":"two",
    "b":"two"
}

{
    "id":3,
    "a":"three",
    "b":"three"
}

这个查询

{"query":{"bool":{"must":[{"wildcard":{"b":"t*"}}]}}}

正如预期的那样匹配两个文档，但是

{"query":{"bool":{"must":[{"wildcard":{"a":"t*"}}]}}}

不匹配。这是怎么回事？

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