source

func ReadBinding ¶

func ReadBinding(
	ctx context.Context,
	db *sql.DB,
) (map[string]Binding, error)

ReadBinding reads all enabled binding information from the TiDB cluster and use a map of SQL digest to Binding to represent them.

func ReadStmtSummary ¶

func ReadStmtSummary(
	ctx context.Context,
	db *sql.DB,
	outCh chan<- *StmtSummary,
) error

ReadStmtSummary reads the statement summary from the TiDB cluster. It emits the StmtSummary one by one into `outCh`, or return error. When work is completed, it will return nil. In any cases it will not close the channel.

TODO(lance6716): can use statements_summary_evicted to calculate confidence TODO(lance6716): query CLUSTER_STATEMENTS_SUMMARY to get real time data

func ReadTableStats ¶

func ReadTableStats(
	ctx context.Context,
	client *http.Client,
	addr string,
	schema, table string,
) (string, error)