Module read_columns 

Structs

ParquetReadColumn

Read requirement for a single parquet root column.

ParquetReadColumns

The parquet columns to read.

ProjectionMaskPlan

Projection plan built for a parquet file.

Enums

NestedSelectionPolicy 🔒

Nested leaf selection semantics.

Functions

build_parquet_leaves_indices 🔒

Builds parquet leaf-column indices for reading a parquet file.

build_projection_plan 🔒

Builds a projection mask plan for reading a parquet file.

find_nearest_variant_parent 🔒

find_remainder_leaves 🔒

Finds the Parquet leaves backing a JSON2 v2 remainder field.

group_requested_leaf_ranges 🔒

Groups file-level leaf ranges for requested roots.

is_variant_leaf 🔒

path_points_to_struct 🔒

Returns whether a nested path points to an explicitly materialized object.

select_json2_leaves 🔒

V2 can additionally store missing paths and object children in the remainder.

select_prefix_leaves 🔒

Selects prefix matches and returns a match flag for each requested nested path.

Type Aliases

ParquetNestedPath

A nested field access path inside one parquet root column.