Reindex to change the name of multiple fields

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1

Hi,

As title says, is it possible to Reindex to change the name of multiple fields?
Instruction shown here is only for single field.

Thanks!

2

Sure, you the script can be multiple lines.

3

Can you show me a simple example?
I tried to nest script field but it gives me a syntax error

4

Just the script portion:

"script": {
  "inline": "ctx._source['newfield1'] = ctx._source.remove('oldfield1'); ctx._source['newfield2'] = ctx._source.remove('oldfield2');"
}
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