optimizer

Documentation

Index

• type Optimizer
• type SimpleOptimizer
  • func NewSimpleOptimizer(log *xlog.Log, database string, query string, node sqlparser.Statement, ...) *SimpleOptimizer
  • func (so *SimpleOptimizer) BuildPlanTree() (*planner.PlanTree, error)

Types

type Optimizer

type Optimizer interface {
	BuildPlanTree() (*planner.PlanTree, error)
}

Optimizer interface.

type SimpleOptimizer

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

SimpleOptimizer is a simple optimizer who dispatches the plans

func NewSimpleOptimizer

func NewSimpleOptimizer(log *xlog.Log, database string, query string, node sqlparser.Statement, router *router.Router) *SimpleOptimizer

NewSimpleOptimizer creates the new simple optimizer.

func (*SimpleOptimizer) BuildPlanTree

func (so *SimpleOptimizer) BuildPlanTree() (*planner.PlanTree, error)

BuildPlanTree used to build plan trees for the query.