types

package
v0.0.0-...-0601960 Latest Latest
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 Go to latest Published: Oct 10, 2024 License: MIT Imports: 8 Imported by: 0

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Constants

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const DeallocatedPageErr = errors.Error("dellocated Page ID is passed.")
View Source 
const InvalidPageID = PageID(-1)

InvalidPageID represents an invalid page GetPageId

View Source 
const SizeOfLSN = 4

Variables

This section is empty.

Functions

This section is empty.

Types

type Bool 

type Bool bool

func NewBoolFromBytes 

func NewBoolFromBytes(data []byte) (ret_ Bool)

func (Bool) Serialize 

func (flag Bool) Serialize() []byte

Serialize casts it to []byte

type Int32 

type Int32 int32

func NewInt32FromBytes 

func NewInt32FromBytes(data []byte) (ret_ Int32)

func (Int32) Serialize 

func (id Int32) Serialize() []byte

Serialize casts it to []byte

type LSN 

type LSN int32

LSN is the type of the log identifier

func NewLSNFromBytes 

func NewLSNFromBytes(data []byte) (ret LSN)

NewLSNFromBytes creates a LSN from []byte

func (LSN) AtomicAdd 

func (lsn LSN) AtomicAdd(val int32)

func (LSN) Serialize 

func (lsn LSN) Serialize() []byte

Serialize casts it to []byte

type PageID 

type PageID int32

PageID is the type of the page identifier

func NewPageIDFromBytes 

func NewPageIDFromBytes(data []byte) (ret PageID)

NewPageIDFromBytes creates a page id from []byte

func (PageID) IsValid 

func (id PageID) IsValid() bool

IsValid checks if id is valid

func (PageID) Serialize 

func (id PageID) Serialize() []byte

Serialize casts it to []byte

type TxnID 

type TxnID int32

TxnID is the type of the transaction identifier

func NewTxnIDFromBytes 

func NewTxnIDFromBytes(data []byte) (ret TxnID)

NewPageIDFromBytes creates a page id from []byte

func (*TxnID) AtomicAdd 

func (id *TxnID) AtomicAdd(val int32)

func (TxnID) Serialize 

func (id TxnID) Serialize() []byte

Serialize casts it to []byte

type TypeID 

type TypeID int
const (
	Invalid TypeID = iota
	Boolean
	Tinyint
	Smallint
	Integer
	BigInt
	Decimal
	Float
	Varchar
	Timestamp
	Null
)

Every possible SQL type GetPageId

func (TypeID) Size 

func (t TypeID) Size() uint32

type UInt16 

type UInt16 uint16

func NewUInt16FromBytes 

func NewUInt16FromBytes(data []byte) (ret_ UInt16)

func (UInt16) Serialize 

func (id UInt16) Serialize() []byte

Serialize casts it to []byte

type UInt32 

type UInt32 uint32

func NewUInt32FromBytes 

func NewUInt32FromBytes(data []byte) (ret_ UInt32)

func (UInt32) Serialize 

func (id UInt32) Serialize() []byte

Serialize casts it to []byte

type UInt64 

type UInt64 uint64

func NewUInt64FromBytes 

func NewUInt64FromBytes(data []byte) (ret_ UInt64)

func (UInt64) Serialize 

func (id UInt64) Serialize() []byte

Serialize casts it to []byte

type Value 

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

A value is an class that represents a view over SQL data stored in some materialized state. All values have a type and comparison functions, and implement other type-specific functionality.

func NewBoolean 

func NewBoolean(value bool) Value

func NewFloat 

func NewFloat(value float32) Value

func NewInteger 

func NewInteger(value int32) Value

func NewNull 

func NewNull() Value

it can be used only when you can not know value type to be compared or something

func NewValue 

func NewValue(value interface{}) Value

func NewValueFromBytes 

func NewValueFromBytes(data []byte, valueType TypeID) (ret *Value)

NewValueFromBytes is used for deserialization

func NewVarchar 

func NewVarchar(value string) Value

func (Value) Add 

func (v Value) Add(other *Value) *Value

func (Value) CompareEquals 

func (v Value) CompareEquals(right Value) bool

func (Value) CompareGreaterThan 

func (v Value) CompareGreaterThan(right Value) bool

func (Value) CompareGreaterThanOrEqual 

func (v Value) CompareGreaterThanOrEqual(right Value) bool

func (Value) CompareLessThan 

func (v Value) CompareLessThan(right Value) bool

func (Value) CompareLessThanOrEqual 

func (v Value) CompareLessThanOrEqual(right Value) bool

func (Value) CompareNotEquals 

func (v Value) CompareNotEquals(right Value) bool

func (Value) GetDeepCopy 

func (v Value) GetDeepCopy() *Value

func (Value) IsInfMax 

func (v Value) IsInfMax() bool

func (Value) IsInfMin 

func (v Value) IsInfMin() bool

func (Value) IsNull 

func (v Value) IsNull() bool

func (Value) Max 

func (v Value) Max(other *Value) *Value

func (Value) Min 

func (v Value) Min(other *Value) *Value

func (Value) Serialize 

func (v Value) Serialize() []byte

func (Value) SerializeOnlyVal 

func (v Value) SerializeOnlyVal() []byte

no length info and isNull info

func (Value) SetInfMax 

func (v Value) SetInfMax() *Value

func (Value) SetInfMin 

func (v Value) SetInfMin() *Value

func (Value) SetNull 

func (v Value) SetNull() *Value

note: (need to be) only way to get Value object which has NULL value 

a value filed correspoding to value type is initialized to default value

func (Value) Size 

func (v Value) Size() uint32

Size returns the size in bytes that the type will occupy inside the tuple

func (Value) Sub 

func (v Value) Sub(other *Value) *Value

func (Value) Swap 

func (v Value) Swap(other *Value)

func (Value) ToBoolean 

func (v Value) ToBoolean() bool

if you use this to get column value NULL value check is needed in general

func (Value) ToFloat 

func (v Value) ToFloat() float32

if you use this to get column value NULL value check is needed in general

func (Value) ToIFValue 

func (v Value) ToIFValue() interface{}

func (Value) ToInteger 

func (v Value) ToInteger() int32

if you use this to get column value NULL value check is needed in general

func (Value) ToString 

func (v Value) ToString() string

func (Value) ToVarchar 

func (v Value) ToVarchar() string

if you use this to get column value NULL value check is needed in general

func (Value) ValueType 

func (v Value) ValueType() TypeID

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