Module stats

Aggregate statistics about data stored in persist.

Re-exports

• pub use bytes::AtomicBytesStats;
• pub use bytes::BytesStats;
• pub use bytes::FixedSizeBytesStats;
• pub use bytes::FixedSizeBytesStatsKind;
• pub use json::JsonMapElementStats;
• pub use json::JsonStats;
• pub use primitive::truncate_bytes;
• pub use primitive::truncate_string;
• pub use primitive::PrimitiveStats;
• pub use primitive::PrimitiveStatsVariants;
• pub use primitive::TruncateBound;
• pub use primitive::TRUNCATE_LEN;
• pub use structured::StructStats;

Modules

• bytes
• json
• primitive
• proto_bytes_stats
  Nested message and enum types in ProtoBytesStats.
• proto_dyn_stats
  Nested message and enum types in ProtoDynStats.
• proto_fixed_size_bytes_stats
  Nested message and enum types in ProtoFixedSizeBytesStats.
• proto_json_stats
  Nested message and enum types in ProtoJsonStats.
• proto_primitive_stats
  Nested message and enum types in ProtoPrimitiveStats.
• structured

Macros

• primitive_stats 🔒
  We collect stats for all primitive types in exactly the same way. This macro de-duplicates some of that logic.

Structs

• ColumnNullStats
  Statistics about the null values in a column.
• ColumnarStats
  Statistics for a single column of data.
• NoneStats
  Empty set of statistics.
• OptionStats
  Statistics about a column of some optional type.
• PartStats
  Aggregate statistics about data contained in a Part.
• PartStatsMetrics
  Metrics for PartStats.
• ProtoAtomicBytesStats
• ProtoBytesStats
• ProtoDynStats
• ProtoFixedSizeBytesStats
• ProtoJsonMapElementStats
• ProtoJsonMapStats
• ProtoJsonStats
• ProtoOptionStats
• ProtoPrimitiveBytesStats
• ProtoPrimitiveStats
• ProtoStructStats

Enums

• ColumnStatKinds
  All of the kinds of statistics that we support.

Traits

• ColumnStats
  Aggregate statistics about a column of type T.
• ColumnarStatsBuilder
  A type that can incrementally collect stats from a sequence of values.
• DynStats
  Type that can be used to represent some ColumnStats.
• TrimStats
  Trim, possibly in a lossy way, statistics to reduce the serialization costs.

Functions

• any_columnar_stats 🔒
  Returns a Strategy that generates arbitrary ColumnarStats.
• trim_to_budget
  Trims the included column status until they fit within a budget.
• trim_to_budget_jsonb 🔒
• trim_to_budget_struct 🔒
  Recursively trims cols in the struct, greatest-size first, keeping force kept cols and ancestors of force kept cols.