Help us shape the future of Go! Take the 2026 Go Developer Survey

schema

package
v0.1.0 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jun 12, 2026 License: Apache-2.0 Imports: 2 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func ToArrow 

func ToArrow(s *Schema) (*arrow.Schema, error)

ToArrow builds an Arrow schema from a Cosma Schema. Every field must carry a non-nil ArrowType (set by FromArrow or at construction).

Types

type DType 

type DType string

DType is Cosma’s logical type enum. Keep it small at first; you can map it to Arrow types later. 

const (
	Null            DType = "null"
	Bool            DType = "bool"
	Int8            DType = "int8"
	Int16           DType = "int16"
	Int32           DType = "int32"
	Int64           DType = "int64"
	UInt8           DType = "uint8"
	UInt16          DType = "uint16"
	UInt32          DType = "uint32"
	UInt64          DType = "uint64"
	Float16         DType = "float16"
	Float32         DType = "float32"
	Float64         DType = "float64"
	Utf8            DType = "utf8"
	String          DType = Utf8
	LargeUtf8       DType = "large_utf8"
	Binary          DType = "binary"
	LargeBinary     DType = "large_binary"
	FixedSizeBinary DType = "fixed_size_binary"
	Date32          DType = "date32"
	Date64          DType = "date64"
	Time32          DType = "time32"
	Time64          DType = "time64"
	Timestamp       DType = "timestamp"
	Duration        DType = "duration"
	IntervalMonth   DType = "interval_month"
	IntervalDayTime DType = "interval_day_time"
	IntervalMDN     DType = "interval_month_day_nano"
	List            DType = "list"
	LargeList       DType = "large_list"
	FixedSizeList   DType = "fixed_size_list"
	ListView        DType = "list_view"
	LargeListView   DType = "large_list_view"
	Struct          DType = "struct"
	Map             DType = "map"
	SparseUnion     DType = "sparse_union"
	DenseUnion      DType = "dense_union"
	Dictionary      DType = "dictionary"
	Decimal128      DType = "decimal128"
	Decimal256      DType = "decimal256"
	RunEndEncoded   DType = "run_end_encoded"
	Extension       DType = "extension"
	StringView      DType = "string_view"
	BinaryView      DType = "binary_view"
)

func DTypeFromArrow 

func DTypeFromArrow(dt arrow.DataType) (DType, error)

DTypeFromArrow maps an Arrow data type to its Cosma logical DType.

type Field 

type Field struct {
	Name      string
	Type      DType
	Nullable  bool
	ArrowType arrow.DataType
}

func FieldFromArrow 

func FieldFromArrow(name string, dt arrow.DataType) (Field, error)

FieldFromArrow builds a single non-nullable Field from a name and Arrow type.

type Schema 

type Schema struct {
	// contains filtered or unexported fields
}

Schema is a minimal public schema with controlled mutability.

func FromArrow 

func FromArrow(s *arrow.Schema) (*Schema, error)

FromArrow builds a Cosma Schema from an Arrow schema, carrying each field's Arrow type through so it can be translated back losslessly.

func New 

func New(fields ...Field) *Schema

func (*Schema) Field 

func (s *Schema) Field(name string) (Field, bool)

func (*Schema) FieldIndex 

func (s *Schema) FieldIndex(name string) (int, bool)

func (*Schema) Fields 

func (s *Schema) Fields() []Field

func (*Schema) Len 

func (s *Schema) Len() int

func (*Schema) String 

func (s *Schema) String() string

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.