hashmap

package
v0.8.0 Latest Latest
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 Go to latest Published: Jun 30, 2023 License: Apache-2.0 Imports: 7 Imported by: 0

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Index

Constants

View Source 
const (
	UnitLimit = 256
)

Variables

View Source 
var (
	OneUInt8s []uint8
	OneInt64s []int64
)

Functions

This section is empty.

Types

type HashMap added in v0.6.0 

type HashMap interface {
	// HasNull returns whether the hash map considers the null values.
	HasNull() bool
	// Free method frees the hash map.
	Free()
	// AddGroup adds 1 to the row count of hash map.
	AddGroup()
	// AddGroups adds N to the row count of hash map.
	AddGroups(uint64)
	// GroupCount returns the hash map's row count.
	GroupCount() uint64
	// Size returns the hash map's size
	Size() int64
}

HashMap is the encapsulated hash table interface exposed to the outside

type IntHashMap added in v0.6.0 

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

IntHashMap key is int64, value is an uint64 (start from 1) before you use the IntHashMap, the user should make sure that sum of vectors' length equal to 8

func NewIntHashMap added in v0.6.0 

func NewIntHashMap(hasNull bool, ibucket, nbucket uint64, m *mpool.MPool) (*IntHashMap, error)

func (*IntHashMap) AddGroup added in v0.6.0 

func (m *IntHashMap) AddGroup()

func (*IntHashMap) AddGroups added in v0.6.0 

func (m *IntHashMap) AddGroups(rows uint64)

func (*IntHashMap) Cardinality added in v0.6.0 

func (m *IntHashMap) Cardinality() uint64

func (*IntHashMap) Free added in v0.6.0 

func (m *IntHashMap) Free()

func (*IntHashMap) GroupCount added in v0.6.0 

func (m *IntHashMap) GroupCount() uint64

func (*IntHashMap) HasNull added in v0.6.0 

func (m *IntHashMap) HasNull() bool

func (*IntHashMap) NewIterator added in v0.6.0 

func (m *IntHashMap) NewIterator() *intHashMapIterator

func (*IntHashMap) Size added in v0.7.0 

func (m *IntHashMap) Size() int64

type Iterator added in v0.6.0 

type Iterator interface {
	// Insert vecs[start, start+count) into hashmap
	// vs  : the number of rows corresponding to each value in the hash table (start with 1)
	// zvs : if zvs[i] is 0 indicates the presence null, 1 indicates the absence of a null.
	Insert(start, count int, vecs []*vector.Vector) (vs []uint64, zvs []int64, err error)

	// Find vecs[start, start+count) in hashmap
	// vs  : the number of rows corresponding to each value in the hash table (start with 1, and 0 means not found.)
	// zvs : if zvs[i] is 0 indicates the presence null, 1 indicates the absence of a null.
	Find(start, count int, vecs []*vector.Vector, inBuckets []uint8) (vs []uint64, zvs []int64)
}

Iterator allows users to do insert or find operations on hash tables in bulk.

type JoinMap added in v0.6.0 

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

JoinMap is used for join

func NewJoinMap added in v0.6.0 

func NewJoinMap(sels [][]int32, expr *plan.Expr, mp *StrHashMap, hasNull bool) *JoinMap

func (*JoinMap) Dup added in v0.6.0 

func (jm *JoinMap) Dup() *JoinMap

func (*JoinMap) Expr added in v0.6.0 

func (jm *JoinMap) Expr() *plan.Expr

func (*JoinMap) Free added in v0.6.0 

func (jm *JoinMap) Free()

func (*JoinMap) HasNull added in v0.6.0 

func (jm *JoinMap) HasNull() bool

func (*JoinMap) IncRef added in v0.6.0 

func (jm *JoinMap) IncRef(ref int64)

func (*JoinMap) Map added in v0.6.0 

func (jm *JoinMap) Map() *StrHashMap

func (*JoinMap) Sels added in v0.6.0 

func (jm *JoinMap) Sels() [][]int32

func (*JoinMap) SetDupCount added in v0.7.0 

func (jm *JoinMap) SetDupCount(ref int64)

func (*JoinMap) Size added in v0.7.0 

func (jm *JoinMap) Size() int64

type StrHashMap 

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

StrHashMap key is []byte, value is an uint64 value (starting from 1) 

each time a new key is inserted, the hashtable returns a last-value+1 or, if the old key is inserted, the value corresponding to that key

func NewStrMap 

func NewStrMap(hasNull bool, ibucket, nbucket uint64, m *mpool.MPool) (*StrHashMap, error)

func (*StrHashMap) AddGroup added in v0.6.0 

func (m *StrHashMap) AddGroup()

func (*StrHashMap) AddGroups added in v0.6.0 

func (m *StrHashMap) AddGroups(rows uint64)

func (*StrHashMap) Cardinality added in v0.6.0 

func (m *StrHashMap) Cardinality() uint64

func (*StrHashMap) Free added in v0.6.0 

func (m *StrHashMap) Free()

func (*StrHashMap) GroupCount added in v0.6.0 

func (m *StrHashMap) GroupCount() uint64

func (*StrHashMap) HasNull added in v0.6.0 

func (m *StrHashMap) HasNull() bool

func (*StrHashMap) Insert 

func (m *StrHashMap) Insert(vecs []*vector.Vector, row int) (bool, error)

Insert a row from multiple columns into the hashmap, return true if it is new, otherwise false

func (*StrHashMap) InsertValue 

func (m *StrHashMap) InsertValue(val any) (bool, error)

InsertValue insert a value, return true if it is new, otherwise false never handle null

func (*StrHashMap) NewIterator added in v0.6.0 

func (m *StrHashMap) NewIterator() Iterator

func (*StrHashMap) Size added in v0.7.0 

func (m *StrHashMap) Size() int64

Source Files

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