Index Prefixes

The index_prefixes parameter enables the indexing of term prefixes to allow for prefix searches. It accepts the following settings:

• min_chars (Optional, integer) The minimum prefix length to index. Must be greater than 0, and defaults to 2. The value is inclusive.
• max_chars (Optional, integer) The maximum prefix length to index. Must be at least min_chars and defaults to 5. The value is inclusive.

JSON

{
  "mappings": {
    "properties": {
      "full_name": {
        "type": "text",
        "index_prefixes": {
          "min_chars" : 1,
          "max_chars" : 10
        }
      }
    }
  }
}