opcode

Documentation

Index

• Constants
• Variables
• type AggregateOpcode
  • func (code AggregateOpcode) MarshalJSON() ([]byte, error)
  • func (code AggregateOpcode) String() string
• type PulloutOpcode
  • func (code PulloutOpcode) MarshalJSON() ([]byte, error)
  • func (code PulloutOpcode) String() string

Constants

const (
	PulloutValue = PulloutOpcode(iota)
	PulloutIn
	PulloutNotIn
	PulloutExists
)

This is the list of PulloutOpcode values.

const (
	AggregateUnassigned = AggregateOpcode(iota)
	AggregateCount
	AggregateSum
	AggregateMin
	AggregateMax
	AggregateCountDistinct
	AggregateSumDistinct
	AggregateGtid
	AggregateRandom
	AggregateCountStar
)

These constants list the possible aggregate opcodes.

Variables

var (
	// OpcodeType keeps track of the known output types for different aggregate functions
	OpcodeType = map[AggregateOpcode]querypb.Type{
		AggregateCountDistinct: sqltypes.Int64,
		AggregateCount:         sqltypes.Int64,
		AggregateCountStar:     sqltypes.Int64,
		AggregateSumDistinct:   sqltypes.Decimal,
		AggregateSum:           sqltypes.Decimal,
		AggregateGtid:          sqltypes.VarChar,
	}
)

var SupportedAggregates = map[string]AggregateOpcode{
	"count": AggregateCount,
	"sum":   AggregateSum,
	"min":   AggregateMin,
	"max":   AggregateMax,

	"count_distinct": AggregateCountDistinct,
	"sum_distinct":   AggregateSumDistinct,
	"vgtid":          AggregateGtid,
	"count_star":     AggregateCountStar,
	"random":         AggregateRandom,
}

SupportedAggregates maps the list of supported aggregate functions to their opcodes.

Types

type AggregateOpcode

type AggregateOpcode int

AggregateOpcode is the aggregation Opcode.

func (AggregateOpcode) MarshalJSON

func (code AggregateOpcode) MarshalJSON() ([]byte, error)

MarshalJSON serializes the AggregateOpcode as a JSON string. It's used for testing and diagnostics.

func (AggregateOpcode) String

func (code AggregateOpcode) String() string

type PulloutOpcode

type PulloutOpcode int

PulloutOpcode is a number representing the opcode for the PulloutSubquery primitive.

func (PulloutOpcode) MarshalJSON

func (code PulloutOpcode) MarshalJSON() ([]byte, error)

MarshalJSON serializes the PulloutOpcode as a JSON string. It's used for testing and diagnostics.

func (PulloutOpcode) String

func (code PulloutOpcode) String() string