# How to reindex a Index with new data field types?
**URL:** https://discuss.elastic.co/t/how-to-reindex-a-index-with-new-data-field-types/192475
**Category:** Elasticsearch
**Created:** [July 26, 2019, 4:14pm UTC](https://discuss.elastic.co/t/how-to-reindex-a-index-with-new-data-field-types/192475 "2019-07-26T16:14:06Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@matheusribeirogarcia](https://discuss.elastic.co/u/matheusribeirogarcia)
#### Post date: [July 26, 2019, 4:14pm UTC](https://discuss.elastic.co/t/how-to-reindex-a-index-with-new-data-field-types/192475/1 "2019-07-26T16:14:06Z")
Hi, I'm trying to change a field type to another type, I've seem that I cannot do that directly in my current Index, so I'm trying to use the REINDEX API.
I've tried something like this, I know it's wrong, but it's just to show my idea.
```
POST _reindex
{
"source": {
"index": "auto_de_infracao"
},
"dest": {
"index": "auto_de_infracao2"
},
"script": {
"lang": "painless",
"inline": "ctx._source.valAutoInfracao = ctx._source.valAutoInfracaoX",
"type":"number"
}
}
```
Objective change valAutoInfracao type to number
---
### Author:  [@cjcenizal](https://discuss.elastic.co/u/cjcenizal)
#### Post date: [July 26, 2019, 6:25pm UTC](https://discuss.elastic.co/t/how-to-reindex-a-index-with-new-data-field-types/192475/2 "2019-07-26T18:25:32Z")
Hey there, you can change your mappings with a two-step process:
1. Create the destination index with the mappings you want, e.g. `valAutoInfracao` is a number.
2. Reindex data from the source index into the destination index.
As documents are indexed into the destination index, they'll be mapped with the mapping you've specified on that index. See [https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping.html#\_updating\_existing\_field\_mappings](https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping.html#_updating_existing_field_mappings) for more info.
Thanks,
CJ
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 23, 2019, 6:25pm UTC](https://discuss.elastic.co/t/how-to-reindex-a-index-with-new-data-field-types/192475/3 "2019-08-23T18:25:33Z")
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