How Encodings Work

Encodings

Encodings are set automatically by the writer for each column. Despite that the user can can choose to disable ro enable DICITIONARY encoding for the whole file by specifying the value for dictionary_encoding in the options.

Full example here

  "options": {
    "dictionary_encoding": "true",
}

The encodings change based on the writerVersion. Read more in the Choosing the Writer Version