Crate repr

Fundamental data representation.

This module contains the types for representing data in Materialize that all layers of the stack can understand. Think of it as the lingua franca: individual layers may use different representations internally, but they all agree to use this representation at their boundaries.

• The core value type is the Datum enum, which represents a literal value.
• Row extends a Datum horizontally, and has features for efficiently doing so, and can be built via a RowPacker.
• RelationDesc describes what it takes to extend a Row vertically, and corresponds most closely to what is returned from querying our dataflows

Modules

adt	Abstract data types.
cache
relation
row
scalar
strconv	Routines for converting datum values to and from their string representation.

Structs

CachedRecord	A single record from a source and partition that can be written to disk by the cacher thread, and read back in and sent to the ingest pipeline later.
CachedRecordIter	Iterator through a cached set of records.
ColumnName	The name of a column in a RelationDesc.
ColumnType	The type of a Datum.
DatumList	A sequence of Datums
DatumMap	A mapping from string keys to Datums
RelationDesc	A description of the shape of a relation.
RelationType	The type of a relation.
Row	A packed representation for Datums.
RowArena	RowArena is used to hold on to temporary Rows for functions like eval that need to create complex Datums but don't have a Row to put them in yet.
RowPacker	RowPacker is used to build a Row.

Enums

Datum	A single value.
ScalarBaseType
ScalarType	The type of a Datum.

Functions

datum_size

Number of bytes required by the datum.

Type Definitions

Diff	System-wide record count difference type.
Timestamp	System-wide timestamp type.