Module decoder 

Re-exports

use bytes::Bytes; 🔒

use crate::basic::Encoding; 🔒

use crate::basic::EncodingMask; 🔒

use crate::basic::Type; 🔒

use crate::data_type::DataType; 🔒

use crate::encodings::decoding::Decoder; 🔒

use crate::encodings::decoding::DictDecoder; 🔒

use crate::encodings::decoding::PlainDecoder; 🔒

use crate::encodings::decoding::get_decoder; 🔒

use crate::encodings::rle::RleDecoder; 🔒

use crate::errors::ParquetError; 🔒

use crate::errors::Result; 🔒

use crate::schema::types::ColumnDescPtr; 🔒

use crate::util::bit_util::BitReader; 🔒

use crate::util::bit_util::num_required_bits; 🔒

Structs

ColumnValueDecoderImpl

An implementation of ColumnValueDecoder for [T::T]

DefinitionLevelDecoderImpl

An implementation of DefinitionLevelDecoder for [i16]

PreparedFixedLenByteArrayPage 🔒

A value section ready for its ordinary decoder. When validate_count is set, account for its physical values during normal level decoding.

RepetitionLevelDecoderImpl

An implementation of RepetitionLevelDecoder for [i16]

Enums

LevelDecoder 🔒

Constants

ENCODING_SLOTS 🔒

Bucket-based storage for decoder instances keyed by Encoding.

REPETITION_LEVELS_BATCH_SIZE 🔒

Traits

ColumnLevelDecoder

Decodes level data

ColumnValueDecoder

Decodes value data

DefinitionLevelDecoder

RepetitionLevelDecoder

Functions

count_levels_eq 🔒

Returns the number of levels equal to level.

fixed_len_byte_array_payload_size 🔒

normalize_fixed_len_byte_array_data 🔒

Prepare a complete FLBA data-page value section after extracting the levels. PLAIN requires exact size validation; other compliant encodings are unchanged.

normalize_fixed_len_byte_array_payload 🔒

Validate a complete decompressed PLAIN FLBA value section, excluding levels. num_values must count physical non-null values, not rows or requested values. Canonical payloads are returned unchanged, even if values resemble prefixes.

prepare_v1_fixed_len_byte_array 🔒

Prepare V1 FLBA values without teaching the column reader historical layouts. definition_levels contains the maximum level, encoding and encoded levels; absent levels mean that the page’s physical count is already known.