index

Documentation

Index

• func WithCalculateCardinalityMaxRow(row int) optimizerOption
• func WithCompositeIndexMaxColumn(column int) optimizerOption
• func WithCreateIndexStatement(f func(tableName string, columns ...string) string) optimizerOption
• type OptimizeResult
• type Optimizer
  • func NewOptimizer(log *logrus.Entry, ctx *session.Context, opts ...optimizerOption) *Optimizer
  • func (o *Optimizer) Optimize(ctx context.Context, selectStmt *ast.SelectStmt) ([]*OptimizeResult, error)

Functions

func WithCalculateCardinalityMaxRow

func WithCalculateCardinalityMaxRow(row int) optimizerOption

func WithCompositeIndexMaxColumn

func WithCompositeIndexMaxColumn(column int) optimizerOption

func WithCreateIndexStatement

func WithCreateIndexStatement(f func(tableName string, columns ...string) string) optimizerOption

Types

type OptimizeResult

type OptimizeResult struct {
	TableName      string
	IndexedColumns []string

	Reason string
}

type Optimizer

type Optimizer struct {
	*session.Context
	// contains filtered or unexported fields
}

func NewOptimizer

func NewOptimizer(log *logrus.Entry, ctx *session.Context, opts ...optimizerOption) *Optimizer

func (*Optimizer) Optimize

func (o *Optimizer) Optimize(ctx context.Context, selectStmt *ast.SelectStmt) ([]*OptimizeResult, error)

Optimize give index advice for the select statement.