Module metadata 

DFParquetMetadata for fetching Parquet file metadata, statistics and schema information.

Structs

CachedParquetMetaData

Wrapper to implement [FileMetadata] for [ParquetMetaData].

DFParquetMetadata

Handles fetching Parquet file schema, metadata and statistics from object store.

StatisticsAccumulators 🔒

Holds the accumulator state for collecting statistics from row groups

Functions

create_max_min_accs 🔒

get_col_stats 🔒

has_any_exact_match 🔒

Checks if any occurrence of value in array corresponds to a true entry in the exactness array.

min_max_aggregate_data_type 🔒

Min/max aggregation can take Dictionary encode input but always produces unpacked (aka non Dictionary) output. We need to adjust the output data type to reflect this. The reason min/max aggregate produces unpacked output because there is only one min/max value per group; there is no needs to keep them Dictionary encoded

summarize_min_max_null_counts 🔒