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.

Re-exports

use crate::arrow::ByteArrayDecoderPlain; 🔒

use crate::arrow::OffsetBuffer; 🔒

use crate::basic::Encoding; 🔒

use crate::basic::PageType; 🔒

use crate::basic::Type as PhysicalType; 🔒

use crate::column::page::Page; 🔒

use crate::compression::CodecOptions; 🔒

use crate::compression::create_codec; 🔒

use crate::encryption::decrypt::CryptoContext; 🔒

use crate::errors::ParquetError; 🔒

use crate::errors::Result; 🔒

use crate::file::metadata::ColumnChunkMetaData; 🔒

use crate::file::metadata::ParquetMetaData; 🔒

use crate::file::serialized_reader::SerializedPageReaderContext; 🔒

use crate::file::serialized_reader::decode_page; 🔒

use crate::file::serialized_reader::read_page_header_len_from_bytes; 🔒

use crate::file::serialized_reader::verify_page_size; 🔒

use arrow_array::ArrayRef; 🔒

use arrow_schema::DataType as ArrowType; 🔒

use bytes::Bytes; 🔒

use std::sync::Arc; 🔒

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.