vindexes

package
v0.0.0-...-444a4ab Latest Latest
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 Go to latest Published: Feb 14, 2015 License: BSD-3-Clause Imports: 8 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func NewHash 

func NewHash(m map[string]interface{}) (planbuilder.Vindex, error)

NewHash creates a new Hash.

func NewHashAuto 

func NewHashAuto(m map[string]interface{}) (planbuilder.Vindex, error)

NewHashAuto creates a new HashAuto.

func NewLookupHash 

func NewLookupHash(m map[string]interface{}) (planbuilder.Vindex, error)

NewLookupHash creates a LookupHash vindex.

func NewLookupHashAuto 

func NewLookupHashAuto(m map[string]interface{}) (planbuilder.Vindex, error)

NewLookupHashAuto creates a new LookupHashAuto.

func NewLookupHashUnique 

func NewLookupHashUnique(m map[string]interface{}) (planbuilder.Vindex, error)

NewLookupHashUnique creates a LookupHashUnique vindex.

func NewLookupHashUniqueAuto 

func NewLookupHashUniqueAuto(m map[string]interface{}) (planbuilder.Vindex, error)

NewLookupHashUniqueAuto creates a new LookupHashUniqueAuto.

func NewNumeric 

func NewNumeric(_ map[string]interface{}) (planbuilder.Vindex, error)

NewNumeric creates a Numeric vindex.

Types

type Hash 

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

Hash defines vindex that hashes an int64 to a KeyspaceId by using null-key 3DES hash. It's Unique, Reversible and Functional.

func (*Hash) Cost 

func (vind *Hash) Cost() int

Cost returns the cost of this index as 1.

func (*Hash) Create 

func (vind *Hash) Create(vcursor planbuilder.VCursor, id interface{}) error

Create reserves the id by inserting it into the vindex table.

func (*Hash) Delete 

func (vind *Hash) Delete(vcursor planbuilder.VCursor, ids []interface{}, _ key.KeyspaceId) error

Delete deletes the entry from the vindex table.

func (*Hash) Map 

func (vind *Hash) Map(_ planbuilder.VCursor, ids []interface{}) ([]key.KeyspaceId, error)

Map returns the corresponding KeyspaceId values for the given ids.

func (*Hash) ReverseMap 

func (vind *Hash) ReverseMap(_ planbuilder.VCursor, ksid key.KeyspaceId) (interface{}, error)

ReverseMap returns the id from ksid.

func (*Hash) Verify 

func (vind *Hash) Verify(_ planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) (bool, error)

Verify returns true if id maps to ksid.

type HashAuto 

type HashAuto struct {
	Table, Column string
	// contains filtered or unexported fields
}

HashAuto defines vindex that hashes an int64 to a KeyspaceId by using null-key 3DES hash. It's Unique, Reversible and Functional. Additionally, it's also a FunctionalGenerator because it's capable of generating new values from a vindex table with a single unique autoinc column.

func (*HashAuto) Cost 

func (vind *HashAuto) Cost() int

Cost returns the cost of this index as 1.

func (*HashAuto) Create 

func (vind *HashAuto) Create(vcursor planbuilder.VCursor, id interface{}) error

Create reserves the id by inserting it into the vindex table.

func (*HashAuto) Delete 

func (vind *HashAuto) Delete(vcursor planbuilder.VCursor, ids []interface{}, _ key.KeyspaceId) error

Delete deletes the entry from the vindex table.

func (*HashAuto) Generate 

func (vind *HashAuto) Generate(vcursor planbuilder.VCursor) (id int64, err error)

Generate generates a new id by using the autoinc of the vindex table.

func (*HashAuto) Init 

func (vind *HashAuto) Init(m map[string]interface{})

Init initializes HashAuto.

func (*HashAuto) Map 

func (vind *HashAuto) Map(_ planbuilder.VCursor, ids []interface{}) ([]key.KeyspaceId, error)

Map returns the corresponding KeyspaceId values for the given ids.

func (*HashAuto) ReverseMap 

func (vind *HashAuto) ReverseMap(_ planbuilder.VCursor, ksid key.KeyspaceId) (interface{}, error)

ReverseMap returns the id from ksid.

func (*HashAuto) Verify 

func (vind *HashAuto) Verify(_ planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) (bool, error)

Verify returns true if id maps to ksid.

type LookupHash 

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

LookupHash defines a vindex that uses a lookup table. The table is expected to define the id column as unique. It's NonUnique and a Lookup.

func (*LookupHash) Cost 

func (vind *LookupHash) Cost() int

Cost returns the cost of this vindex as 20.

func (*LookupHash) Create 

func (vind *LookupHash) Create(vcursor planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) error

Create reserves the id by inserting it into the vindex table.

func (*LookupHash) Delete 

func (vind *LookupHash) Delete(vcursor planbuilder.VCursor, ids []interface{}, ksid key.KeyspaceId) error

Delete deletes the entry from the vindex table.

func (*LookupHash) Map 

func (vind *LookupHash) Map(vcursor planbuilder.VCursor, ids []interface{}) ([][]key.KeyspaceId, error)

Map returns the corresponding KeyspaceId values for the given ids.

func (*LookupHash) Verify 

func (vind *LookupHash) Verify(vcursor planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) (bool, error)

Verify returns true if id maps to ksid.

type LookupHashAuto 

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

LookupHashAuto defines a vindex that uses a lookup table. The table is expected to define the id column as unique. It's NonUnique and a Lookup. It's also a LookupGenerator, because it can use the autoinc capabilities of the lookup table.

func (*LookupHashAuto) Cost 

func (vind *LookupHashAuto) Cost() int

Cost returns the cost of this index as 20.

func (*LookupHashAuto) Create 

func (vind *LookupHashAuto) Create(vcursor planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) error

Create reserves the id by inserting it into the vindex table.

func (*LookupHashAuto) Delete 

func (vind *LookupHashAuto) Delete(vcursor planbuilder.VCursor, ids []interface{}, ksid key.KeyspaceId) error

Delete deletes the entry from the vindex table.

func (*LookupHashAuto) Generate 

func (vind *LookupHashAuto) Generate(vcursor planbuilder.VCursor, ksid key.KeyspaceId) (id int64, err error)

Generate reserves the id by inserting it into the vindex table.

func (*LookupHashAuto) Map 

func (vind *LookupHashAuto) Map(vcursor planbuilder.VCursor, ids []interface{}) ([][]key.KeyspaceId, error)

Map returns the corresponding KeyspaceId values for the given ids.

func (*LookupHashAuto) Verify 

func (vind *LookupHashAuto) Verify(vcursor planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) (bool, error)

Verify returns true if id maps to ksid.

type LookupHashUnique 

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

LookupHashUnique defines a vindex that uses a lookup table. The table is expected to define the id column as unique. It's Unique and a Lookup.

func (*LookupHashUnique) Cost 

func (vind *LookupHashUnique) Cost() int

Cost returns the cost of this vindex as 10.

func (*LookupHashUnique) Create 

func (vind *LookupHashUnique) Create(vcursor planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) error

Create reserves the id by inserting it into the vindex table.

func (*LookupHashUnique) Delete 

func (vind *LookupHashUnique) Delete(vcursor planbuilder.VCursor, ids []interface{}, ksid key.KeyspaceId) error

Delete deletes the entry from the vindex table.

func (*LookupHashUnique) Map 

func (vind *LookupHashUnique) Map(vcursor planbuilder.VCursor, ids []interface{}) ([]key.KeyspaceId, error)

Map returns the corresponding KeyspaceId values for the given ids.

func (*LookupHashUnique) Verify 

func (vind *LookupHashUnique) Verify(vcursor planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) (bool, error)

Verify returns true if id maps to ksid.

type LookupHashUniqueAuto 

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

LookupHashUniqueAuto defines a vindex that uses a lookup table. The table is expected to define the id column as unique. It's Unique and a Lookup. It's also a LookupGenerator, because it can use the autoinc capabilities of the lookup table.

func (*LookupHashUniqueAuto) Cost 

func (vind *LookupHashUniqueAuto) Cost() int

Cost returns the cost of this index as 10.

func (*LookupHashUniqueAuto) Create 

func (vind *LookupHashUniqueAuto) Create(vcursor planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) error

Create reserves the id by inserting it into the vindex table.

func (*LookupHashUniqueAuto) Delete 

func (vind *LookupHashUniqueAuto) Delete(vcursor planbuilder.VCursor, ids []interface{}, ksid key.KeyspaceId) error

Delete deletes the entry from the vindex table.

func (*LookupHashUniqueAuto) Generate 

func (vind *LookupHashUniqueAuto) Generate(vcursor planbuilder.VCursor, ksid key.KeyspaceId) (id int64, err error)

Generate reserves the id by inserting it into the vindex table.

func (*LookupHashUniqueAuto) Map 

func (vind *LookupHashUniqueAuto) Map(vcursor planbuilder.VCursor, ids []interface{}) ([]key.KeyspaceId, error)

Map returns the corresponding KeyspaceId values for the given ids.

func (*LookupHashUniqueAuto) Verify 

func (vind *LookupHashUniqueAuto) Verify(vcursor planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) (bool, error)

Verify returns true if id maps to ksid.

type Numeric 

type Numeric struct{}

Numeric defines a bit-pattern mapping of a uint64 to the KeyspaceId. It's Unique and Reversible.

func (Numeric) Cost 

func (Numeric) Cost() int

Cost returns the cost of this vindex as 0.

func (Numeric) Map 

func (Numeric) Map(_ planbuilder.VCursor, ids []interface{}) ([]key.KeyspaceId, error)

Map returns the associated keyspae ids for the given ids.

func (Numeric) ReverseMap 

func (Numeric) ReverseMap(_ planbuilder.VCursor, ksid key.KeyspaceId) (interface{}, error)

ReverseMap returns the associated id for the ksid.

func (Numeric) Verify 

func (Numeric) Verify(_ planbuilder.VCursor, id interface{}, ksid key.KeyspaceId) (bool, error)

Verify returns true if id and ksid match.

Source Files

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