es 修改 mapping 字段类型

一、原索引

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PUT my_index {   "mappings": {     "_doc": {       "properties": {         "create_date": {           "type":   "date",           "format": "yyyy-MM-dd ||yyyy/MM/dd"                     }       }     }   } }

　　二、创建新索引

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PUT my_index2 {   "mappings": {     "_doc": {       "properties": {         "create_date": {           "type":   "text"                     }       }     }   } }

　　三、同步数据

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POST _reindex                    {   "source": {     "index": "my_index"   },   "dest": {     "index": "my_index2"   } }

　　四、删除原索引

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1	DELETE my_index

　　五、设置别名

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POST /_aliases   {         "actions": [             {"add": {"index": "my_index2", "alias": "my_index"}}         ]   }