Convert field data type from text to Date

Elastic Stack Elasticsearch
#1

Hi All,

We have created an index that consists of text data type for all fields, but we need to convert timestamp field from text to date (format "2021-01-12 09:19:25.890") but unable to do.

I have tried creating a new index with the correct data type as below

PUT /index-0002
{
"settings" : {
"number_of_shards" : 4,
"number_of_replicas" : 1
},
"mappings" : {
"properties" : {
"filed1" : { "type" : "long"},
"filed2" : { "type" : "text" },
"filed3" : { "type" : "text" },
"filed4": { "type" : "text" },
"timestamp": {
"type": "date",
"format": "yyyy-MM-dd HH:mm:ss.SSS"
}
}
}
}

migrated data from old to new index using reindex API

POST /_reindex
{
"source": {
"index": "index-0001"
},
"dest": {
"index": "index-0002"
}
}

but once it is done the index data type changed to text instead of date

Please help me resolve this issue.

#2

Welcome to our community! :smiley:

What is the mapping of the index-0001 index?

#3

Thank you for quick response
mapping for index-0001

"mappings" : {
"properties" : {
"filed1" : { "type" : "text"},
"filed2" : { "type" : "text" },
"filed3" : { "type" : "text" },
"filed4": { "type" : "text" },
"timestamp": { "type" : "text" }
}
}

#4

Can you post an example document as well please.

#5

Document Example
{
"_index" : "index-0001",
"_type" : "_doc",
"_id" : "rE64RXYBWfNr3RkH119n",
"_version" : 1,
"_seq_no" : 240,
"_primary_term" : 1,
"found" : true,
"_source" : {
"filed1" : "7",
"filed2" : "info",
"filed3" : "Source exception",
"filed4" : "Exiting ",
"timestamp" : "2020-12-09 03:32:59.830"
}
}

#6

It'd help if you could please format your code/logs/config using the </> button, or markdown style back ticks. It helps to make things easy to read which helps us help you :slight_smile:

#7

PFB details

new index with the correct data type as below

   PUT /index-0002
   {
   "settings":{
      "number_of_shards":4,
      "number_of_replicas":1
   },
   "mappings":{
      "properties":{
         "filed1":{
            "type":"long"
         },
         "filed2":{
            "type":"text"
         },
         "filed3":{
            "type":"text"
         },
         "filed4":{
            "type":"text"
         },
         "timestamp":{
            "type":"date",
            "format":"yyyy-MM-dd HH:mm:ss.SSS"
         }
      }
   }
}

migrated data from old to new index using reindex API

 POST /_reindex
{
   "source":{
      "index":"index-0001"
   },
   "dest":{
      "index":"index-0002"
   }
}

index-0001 mapping

"mappings":{
   "properties":{
      "filed1":{
         "type":"text"
      },
      "filed2":{
         "type":"text"
      },
      "filed3":{
         "type":"text"
      },
      "filed4":{
         "type":"text"
      },
      "timestamp":{
         "type":"text"
      }
   }
}

Document Example

{
   "_index":"index-0001",
   "_type":"_doc",
   "_id":"rE64RXYBWfNr3RkH119n",
   "_version":1,
   "_seq_no":240,
   "_primary_term":1,
   "found":true,
   "_source":{
      "filed1":"7",
      "filed2":"info",
      "filed3":"Source exception",
      "filed4":"Exiting ",
      "timestamp":"2020-12-09 03:32:59.830"
   }
}
#8

That looks fine and the new index has the correct mapping. You should now be able to delete the old index. I assume this solves the problem?

#9

But after executing reindex API, in the new Index, timestamp field data type is text instead of date data type

#10

I don't believe you have posted the mapping for that, just what you used as a template. If you can post the mapping it should make things clearer.

#11

index-0002 mapping

"mappings":{
  "properties":{
     "filed1":{
        "type":"long"
     },
     "filed2":{
        "type":"text"
     },
     "filed3":{
        "type":"text"
     },
     "filed4":{
        "type":"text"
     },
     "timestamp":{
        "type":"date",
        "format":"yyyy-MM-dd HH:mm:ss.SSS"
     }
  }
}
#12

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