pdhelper

Documentation

Index

• Variables
• type PDHelper
  • func (p *PDHelper) GetApproximateTableCountFromStorage(ctx context.Context, sctx sessionctx.Context, tid int64, ...) (float64, bool)
  • func (p *PDHelper) Start()
  • func (p *PDHelper) Stop()

Variables

var GlobalPDHelper = defaultPDHelper()

GlobalPDHelper is the global variable for PDHelper.

Types

type PDHelper

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

PDHelper is used to get some information from PD.

func (*PDHelper) GetApproximateTableCountFromStorage

func (p *PDHelper) GetApproximateTableCountFromStorage(
	ctx context.Context, sctx sessionctx.Context,
	tid int64, dbName, tableName, partitionName string,
) (float64, bool)

GetApproximateTableCountFromStorage gets the approximate count of the table.

func (*PDHelper) Start

func (p *PDHelper) Start()

Start is used to start the background task of PDHelper. Currently, the background task is used to clean up TTL cache.

func (*PDHelper) Stop

func (p *PDHelper) Stop()

Stop stops the background task of PDHelper.