Crate tantivy_columnar

Tantivy-Columnar

tantivy-columnarprovides a columnar storage for tantivy. The crate allows for efficient read operations on specific columns rather than entire records.

Overview

• columnar: Reading, writing, and merging multiple columns:

  • ColumnarWriter: Makes it possible to create a new columnar.
  • ColumnarReader: The ColumnarReader makes it possible to access a set of columns associated to field names.
  • merge_columnar: Contains the functionalities to merge multiple ColumnarReader or segments into a single one.

• column: A single column, which contains

  • column_index: Resolves the rows for a document id. Manages the cardinality of the column.
  • column_values: Stores the values of a column in a dense format.

Re-exports

• pub use column_index::ColumnIndex;
• pub use column_values::ColumnValues;
• pub use column_values::EmptyColumnValues;
• pub use column_values::MonotonicallyMappableToU128;
• pub use column_values::MonotonicallyMappableToU64;

Modules

• column_index
  column_index
• column_values
  fastfield_codecs

Structs

• BytesColumn
  Dictionary encoded column.
• Column
• ColumnBlockAccessor
• ColumnarReader
  The ColumnarReader makes it possible to access a set of columns associated to field names.
• ColumnarWriter
  Makes it possible to create a new columnar.
• DateTime
  A date/time value with nanoseconds precision.
• Dictionary
  An SSTable is a sorted map that associates sorted &[u8] keys to any kind of typed values.
• DynamicColumnHandle
• InvalidData
• RowAddr
• ShuffleMergeOrder
• StackMergeOrder
• StrColumn

Enums

• Cardinality
  Enum describing the number of values that can exist per document (or per row if you will).
• ColumnType
  The column type represents the column type. Any changes need to be propagated to COLUMN_TYPES.
• DynamicColumn
• MergeRowOrder
• NumericalType
• NumericalValue

Traits

• HasAssociatedColumnType

Functions

• merge_columnar
  Merge several columnar table together.

Type Aliases

• DocId
• RowId
• Streamer