Module dictionary 

Decoding a column chunk’s dictionary page directly into an Arrow array, independent of the row-by-row ArrayReader machinery.

This is useful for callers that want the set of distinct values stored in a dictionary-encoded column chunk without reading any data pages, e.g. to prune a row group when the query predicate’s literals are known not to be in the dictionary.

Functions

decode_dictionary_page 🔒

Decodes the dictionary page of a column chunk into an [ArrayRef].

dictionary_page_crypto_context 🔒

Builds the crypto context needed to decrypt the dictionary page of column_metadata, or None if the file (or this column) isn’t encrypted.