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Elastic Docs ›Elasticsearch Guide [1.5] ›Mapping ›Transform

Immutable Transformation

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Immutable Transformation

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Transform script cannot be added to an existing mapping for an index type (regardless of whether the mapping currently uses transform or have any data at all). In other words, transform script has to be added at mapping creation time for an index type.

Also, once configured the transform script cannot be modified. This is not because that is technically impossible but instead because madness lies down that road.

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