Descriptor for a single column in a Parquet schema. More...

#include <types.hpp>

Public Attributes
std::string	name
	Column name (unique within a schema).

PhysicalType	physical_type
	On-disk storage type.

LogicalType	logical_type = LogicalType::NONE
	Semantic annotation (STRING, TIMESTAMP_NS, etc.).

Repetition	repetition = Repetition::REQUIRED
	Nullability / cardinality.

int32_t	type_length = -1
	Byte length for FIXED_LEN_BYTE_ARRAY columns (-1 = N/A).

int32_t	precision = -1
	Decimal precision (-1 = N/A).

int32_t	scale = -1
	Decimal scale (-1 = N/A).

Detailed Description

Descriptor for a single column in a Parquet schema.

Combines the physical storage type, optional logical annotation, repetition level, and type-specific parameters (type_length for FIXED_LEN_BYTE_ARRAY, precision/scale for DECIMAL).

See also: Schema, Column, SchemaBuilder

Definition at line 152 of file types.hpp.

Member Data Documentation

◆ logical_type

LogicalType signet::forge::ColumnDescriptor::logical_type = LogicalType::NONE

Semantic annotation (STRING, TIMESTAMP_NS, etc.).

Definition at line 155 of file types.hpp.

◆ name

std::string signet::forge::ColumnDescriptor::name

Column name (unique within a schema).

Definition at line 153 of file types.hpp.

◆ physical_type

PhysicalType signet::forge::ColumnDescriptor::physical_type

On-disk storage type.

Definition at line 154 of file types.hpp.

◆ precision

int32_t signet::forge::ColumnDescriptor::precision = -1

Decimal precision (-1 = N/A).

Definition at line 158 of file types.hpp.

◆ repetition

Repetition signet::forge::ColumnDescriptor::repetition = Repetition::REQUIRED

Nullability / cardinality.

Definition at line 156 of file types.hpp.

◆ scale

int32_t signet::forge::ColumnDescriptor::scale = -1

Decimal scale (-1 = N/A).

Definition at line 159 of file types.hpp.

◆ type_length

int32_t signet::forge::ColumnDescriptor::type_length = -1

Byte length for FIXED_LEN_BYTE_ARRAY columns (-1 = N/A).

Definition at line 157 of file types.hpp.

The documentation for this struct was generated from the following file:

include/signet/types.hpp

Public Attributes