ES中数据类型转换处理

PUT my_type_index
{
  "mappings": {
    "properties": {
      "price":{
        "type":"float"
      }
    }
  }
}

PUT my_type_index/_doc/1
{
  "price":7.8
}

PUT my_type_index/_doc/2
{
  "price":"9.4"
}

PUT my_type_index/_doc/3
{
  "price":"change the data type"
}

GET my_type_index/_search
{
  "query": {
    "match_all": {}
  }
}

DELETE my_type_index
PUT my_type_index
{
  "mappings": {
    "properties": {
      "price": {
        "type": "float",
        "coerce": false
      }
    }
  }
}

PUT my_type_index/_doc/1
{
  "price":"9.4"
}

DELETE my_type_index2
PUT my_type_index2
{
  "mappings": {
    "properties": {
      "price":{
        "type":"float",
        "coerce": false
      }
    }
  }
}

POST _reindex
{
  "source": {
    "index": "my_type_index"
  },
  "dest": {
    "index": "my_type_index2"
  }
}

PUT _ingest/pipeline/my_convert_test_pipe
{
  "description": "convert string to float", 
  "processors": [
    {
      "convert": {
        "field": "price",
        "type": "float"
      }
    }
  ]
}

POST _reindex
{
  "source": {
    "index": "my_type_index"
  },
  "dest": {
    "index": "my_type_index2",
    "pipeline": "my_convert_test_pipe"
  }
}

GET my_type_index2/_search