func (tc *baseContext) LastMessage() string {
	return ""
}
LastMessage implements QueryCtx LastMessage method.
package server
import (
	"context"
	"fmt"
	"time"
	"github.com/pingcap/parser/ast"
	"github.com/pingcap/parser/auth"
	"github.com/pingcap/tidb/sessionctx/variable"
	"github.com/pingcap/tidb/util"
)
type baseContext struct{}
func (tc *baseContext) Status() uint16 {
	return 1
}
func (tc *baseContext) GetHistorySQL() string {
	return ""
}
func (tc *baseContext) LastInsertID() uint64 {
	return 0
}
func (tc *baseContext) Value(key fmt.Stringer) interface{} {
	return nil
}
func (tc *baseContext) SetValue(key fmt.Stringer, value interface{}) {
}
func (tc *baseContext) CommitTxn(ctx context.Context) error {
	return nil
}
func (tc *baseContext) SetProcessInfo(sql string, t time.Time, command byte, maxExecutionTime uint64) {
}
func (tc *baseContext) RollbackTxn() {
}
func (tc *baseContext) AffectedRows() uint64 {
	return 0
}