val

package
v0.40.4 Latest Latest
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 Go to latest Published: May 19, 2022 License: Apache-2.0 Imports: 9 Imported by: 4

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var EmptyTuple = Tuple([]byte{0, 0})
View Source 
var KeylessCardType = Type{
	Enc:      Uint64Enc,
	Nullable: false,
}
View Source 
var KeylessTupleDesc = TupleDesc{
	Types: []Type{{Enc: Hash128Enc, Nullable: false}},
	// contains filtered or unexported fields
}

Functions

func ModifyKeylessCardinality 

func ModifyKeylessCardinality(value Tuple, delta int64) (after uint64)

func ReadKeylessCardinality 

func ReadKeylessCardinality(value Tuple) uint64

Types

type ByteSize 

type ByteSize uint16
const (
	MaxTupleFields            = 4096
	MaxTupleDataSize ByteSize = math.MaxUint16
)

type Encoding 

type Encoding uint8
const (
	NullEnc    Encoding = 0
	Int8Enc    Encoding = 1
	Uint8Enc   Encoding = 2
	Int16Enc   Encoding = 3
	Uint16Enc  Encoding = 4
	Int32Enc   Encoding = 7
	Uint32Enc  Encoding = 8
	Int64Enc   Encoding = 9
	Uint64Enc  Encoding = 10
	Float32Enc Encoding = 11
	Float64Enc Encoding = 12

	// todo(andy): experimental encodings
	TimestampEnc Encoding = 14
	DateEnc      Encoding = 15
	DatetimeEnc  Encoding = 16
	YearEnc      Encoding = 17
	Hash128Enc   Encoding = 18
)

Constant Size Encodings 

const (
	StringEnc     Encoding = 128
	ByteStringEnc Encoding = 129

	// todo(andy): experimental encodings
	DecimalEnc  Encoding = 130
	JSONEnc     Encoding = 131
	TimeEnc     Encoding = 132
	GeometryEnc Encoding = 133
)

Variable Size Encodings

type OrdinalMapping 

type OrdinalMapping []int

OrdinalMapping is a mapping from one field ordering to another. It's used to construct index tuples from another index's tuples.

func (OrdinalMapping) MapOrdinal 

func (om OrdinalMapping) MapOrdinal(to int) (from int)

type SlicedBuffer 

type SlicedBuffer struct {
	Buf  []byte
	Offs offsets
}

func (SlicedBuffer) GetSlice 

func (sb SlicedBuffer) GetSlice(i int) []byte

GetSlice returns the ith slice of |sb.Buf|.

func (SlicedBuffer) Len 

func (sb SlicedBuffer) Len() int

type Triple 

type Triple[V ~[]byte] []byte

func NewTriple 

func NewTriple[V ~[]byte](pool pool.BuffPool, one, two, three V) (tri Triple[V])

func (Triple[V]) First 

func (t Triple[V]) First() V

func (Triple[V]) Second 

func (t Triple[V]) Second() V

func (Triple[V]) Third 

func (t Triple[V]) Third() V

type Tuple 

type Tuple []byte

func CloneTuple 

func CloneTuple(pool pool.BuffPool, tup Tuple) Tuple

func HashTupleFromValue 

func HashTupleFromValue(pool pool.BuffPool, value Tuple) (key Tuple)

func NewTuple 

func NewTuple(pool pool.BuffPool, values ...[]byte) Tuple

func (Tuple) Count 

func (tup Tuple) Count() int

func (Tuple) FieldIsNull 

func (tup Tuple) FieldIsNull(i int) bool

func (Tuple) GetField 

func (tup Tuple) GetField(i int) []byte

GetField returns the value for field |i|.

func (Tuple) GetManyFields 

func (tup Tuple) GetManyFields(indexes []int, slices [][]byte) [][]byte

GetManyFields takes a sorted slice of ordinals |indexes| and returns the requested tuple fields. It populates field data into |slices| to avoid allocating.

type TupleBuilder 

type TupleBuilder struct {
	Desc TupleDesc
	// contains filtered or unexported fields
}

func NewTupleBuilder 

func NewTupleBuilder(desc TupleDesc) *TupleBuilder

func (*TupleBuilder) Build 

func (tb *TupleBuilder) Build(pool pool.BuffPool) (tup Tuple)

Build materializes a Tuple from the fields written to the TupleBuilder.

func (*TupleBuilder) BuildPermissive 

func (tb *TupleBuilder) BuildPermissive(pool pool.BuffPool) (tup Tuple)

BuildPermissive materializes a Tuple from the fields written to the TupleBuilder without validating nullability.

func (*TupleBuilder) PutBool 

func (tb *TupleBuilder) PutBool(i int, v bool)

PutBool writes a bool to the ith field of the Tuple being built.

func (*TupleBuilder) PutByteString 

func (tb *TupleBuilder) PutByteString(i int, v []byte)

PutByteString writes a []byte to the ith field of the Tuple being built.

func (*TupleBuilder) PutDecimal 

func (tb *TupleBuilder) PutDecimal(i int, v string)

func (*TupleBuilder) PutFloat32 

func (tb *TupleBuilder) PutFloat32(i int, v float32)

PutFloat32 writes a float32 to the ith field of the Tuple being built.

func (*TupleBuilder) PutFloat64 

func (tb *TupleBuilder) PutFloat64(i int, v float64)

PutFloat64 writes a float64 to the ith field of the Tuple being built.

func (*TupleBuilder) PutGeometry 

func (tb *TupleBuilder) PutGeometry(i int, v []byte)

PutGeometry writes a []byte to the ith field of the Tuple being built.

func (*TupleBuilder) PutInt16 

func (tb *TupleBuilder) PutInt16(i int, v int16)

PutInt16 writes an int16 to the ith field of the Tuple being built.

func (*TupleBuilder) PutInt32 

func (tb *TupleBuilder) PutInt32(i int, v int32)

PutInt32 writes an int32 to the ith field of the Tuple being built.

func (*TupleBuilder) PutInt64 

func (tb *TupleBuilder) PutInt64(i int, v int64)

PutInt64 writes an int64 to the ith field of the Tuple being built.

func (*TupleBuilder) PutInt8 

func (tb *TupleBuilder) PutInt8(i int, v int8)

PutInt8 writes an int8 to the ith field of the Tuple being built.

func (*TupleBuilder) PutJSON 

func (tb *TupleBuilder) PutJSON(i int, v []byte)

PutJSON writes a []byte to the ith field of the Tuple being built.

func (*TupleBuilder) PutRaw 

func (tb *TupleBuilder) PutRaw(i int, buf []byte)

PutRaw writes a []byte to the ith field of the Tuple being built.

func (*TupleBuilder) PutSqlTime 

func (tb *TupleBuilder) PutSqlTime(i int, v string)

PutSqlTime writes a string to the ith field of the Tuple being built.

func (*TupleBuilder) PutString 

func (tb *TupleBuilder) PutString(i int, v string)

PutString writes a string to the ith field of the Tuple being built.

func (*TupleBuilder) PutTimestamp 

func (tb *TupleBuilder) PutTimestamp(i int, v time.Time)

func (*TupleBuilder) PutUint16 

func (tb *TupleBuilder) PutUint16(i int, v uint16)

PutUint16 writes a uint16 to the ith field of the Tuple being built.

func (*TupleBuilder) PutUint32 

func (tb *TupleBuilder) PutUint32(i int, v uint32)

PutUint32 writes a uint32 to the ith field of the Tuple being built.

func (*TupleBuilder) PutUint64 

func (tb *TupleBuilder) PutUint64(i int, v uint64)

PutUint64 writes a uint64 to the ith field of the Tuple being built.

func (*TupleBuilder) PutUint8 

func (tb *TupleBuilder) PutUint8(i int, v uint8)

PutUint8 writes a uint8 to the ith field of the Tuple being built.

func (*TupleBuilder) PutYear 

func (tb *TupleBuilder) PutYear(i int, v int16)

PutYear writes an int16-encoded year to the ith field of the Tuple being built.

func (*TupleBuilder) Recycle 

func (tb *TupleBuilder) Recycle()

Recycle resets the TupleBuilder so it can build a new Tuple.

type TupleComparator 

type TupleComparator interface {
	// Compare compares pairs of Tuples.
	Compare(left, right Tuple, desc TupleDesc) int

	// CompareValues compares pairs of values.
	CompareValues(left, right []byte, typ Type) int
}

TupleComparator compares Tuples.

type TupleDesc 

type TupleDesc struct {
	Types []Type
	// contains filtered or unexported fields
}

TupleDesc describes a Tuple set. Data structures that contain Tuples and algorithms that process Tuples use a TupleDesc's types to interpret the fields of a Tuple.

func NewTupleDescriptor 

func NewTupleDescriptor(types ...Type) TupleDesc

NewTupleDescriptor makes a TupleDescriptor from |types|.

func NewTupleDescriptorWithComparator 

func NewTupleDescriptorWithComparator(cmp TupleComparator, types ...Type) (td TupleDesc)

NewTupleDescriptorWithComparator returns a TupleDesc from a slice of Types.

func (TupleDesc) Comparator 

func (td TupleDesc) Comparator() TupleComparator

Comparator returns the TupleDescriptor's TupleComparator.

func (TupleDesc) Compare 

func (td TupleDesc) Compare(left, right Tuple) (cmp int)

Compare compares |left| and |right|.

func (TupleDesc) CompareField 

func (td TupleDesc) CompareField(value []byte, i int, tup Tuple) (cmp int)

CompareField compares |value| with the ith field of |tup|.

func (TupleDesc) Count 

func (td TupleDesc) Count() int

Count returns the number of fields in the TupleDesc.

func (TupleDesc) Equals 

func (td TupleDesc) Equals(other TupleDesc) bool

Equals returns true if |td| and |other| have equal type slices.

func (TupleDesc) Format 

func (td TupleDesc) Format(tup Tuple) string

Format prints a Tuple as a string.

func (TupleDesc) FormatValue 

func (td TupleDesc) FormatValue(i int, value []byte) string

func (TupleDesc) GetBool 

func (td TupleDesc) GetBool(i int, tup Tuple) (v bool, ok bool)

GetBool reads a bool from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetBytes 

func (td TupleDesc) GetBytes(i int, tup Tuple) (v []byte, ok bool)

GetBytes reads a []byte from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetDecimal 

func (td TupleDesc) GetDecimal(i int, tup Tuple) (v string, ok bool)

GetDecimal reads a float64 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetField 

func (td TupleDesc) GetField(i int, tup Tuple) []byte

GetField returns the ith field of |tup|.

func (TupleDesc) GetFloat32 

func (td TupleDesc) GetFloat32(i int, tup Tuple) (v float32, ok bool)

GetFloat32 reads a float32 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetFloat64 

func (td TupleDesc) GetFloat64(i int, tup Tuple) (v float64, ok bool)

GetFloat64 reads a float64 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetGeometry 

func (td TupleDesc) GetGeometry(i int, tup Tuple) (v []byte, ok bool)

GetGeometry reads a []byte from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetInt16 

func (td TupleDesc) GetInt16(i int, tup Tuple) (v int16, ok bool)

GetInt16 reads an int16 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetInt32 

func (td TupleDesc) GetInt32(i int, tup Tuple) (v int32, ok bool)

GetInt32 reads an int32 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetInt64 

func (td TupleDesc) GetInt64(i int, tup Tuple) (v int64, ok bool)

GetInt64 reads an int64 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetInt8 

func (td TupleDesc) GetInt8(i int, tup Tuple) (v int8, ok bool)

GetInt8 reads an int8 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetJSON 

func (td TupleDesc) GetJSON(i int, tup Tuple) (v []byte, ok bool)

GetJSON reads a []byte from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetSqlTime 

func (td TupleDesc) GetSqlTime(i int, tup Tuple) (v string, ok bool)

GetSqlTime reads a string encoded Time value from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetString 

func (td TupleDesc) GetString(i int, tup Tuple) (v string, ok bool)

GetString reads a string from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetTimestamp 

func (td TupleDesc) GetTimestamp(i int, tup Tuple) (v time.Time, ok bool)

GetTimestamp reads a time.Time from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetUint16 

func (td TupleDesc) GetUint16(i int, tup Tuple) (v uint16, ok bool)

GetUint16 reads a uint16 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetUint32 

func (td TupleDesc) GetUint32(i int, tup Tuple) (v uint32, ok bool)

GetUint32 reads a uint32 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetUint64 

func (td TupleDesc) GetUint64(i int, tup Tuple) (v uint64, ok bool)

GetUint64 reads a uint64 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetUint8 

func (td TupleDesc) GetUint8(i int, tup Tuple) (v uint8, ok bool)

GetUint8 reads a uint8 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) GetYear 

func (td TupleDesc) GetYear(i int, tup Tuple) (v int16, ok bool)

GetYear reads an int16 from the ith field of the Tuple. If the ith field is NULL, |ok| is set to false.

func (TupleDesc) IsNull 

func (td TupleDesc) IsNull(i int, tup Tuple) bool

IsNull returns true if the ith field of the Tuple is NULL.

type Type 

type Type struct {
	Enc      Encoding
	Nullable bool
}

Source Files

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