func (r *Router) buildDeletePlan(statement sqlparser.Statement) (*Plan, error) {
plan := &Plan{}
var where *sqlparser.Where
var err error
stmt := statement.(*sqlparser.Delete)
plan.Rule = r.GetRule(sqlparser.String(stmt.Table))
where = stmt.Where
if where != nil {
plan.Criteria = where.Expr //路由条件
err = plan.calRouteIndexs()
if err != nil {
golog.Error("Route", "BuildUpdatePlan", err.Error(), 0)
return nil, err
}
} else {
//if shard delete without where,send to all nodes and all tables
plan.RouteTableIndexs = plan.Rule.SubTableIndexs
plan.RouteNodeIndexs = makeList(0, len(plan.Rule.Nodes))
}
if plan.Rule.Type != DefaultRuleType && len(plan.RouteTableIndexs) == 0 {
golog.Error("Route", "BuildDeletePlan", errors.ErrNoCriteria.Error(), 0)
return nil, errors.ErrNoCriteria
}
//generate sql,如果routeTableindexs为空则表示不分表，不分表则发default node
err = r.generateDeleteSql(plan, stmt)
if err != nil {
return nil, err
}
return plan, nil
}
func (s *Server) onConn(c net.Conn) {
s.counter.IncrClientConns()
conn := s.newClientConn(c) //新建一个conn
defer func() {
err := recover()
if err != nil {
const size = 4096
buf := make([]byte, size)
buf = buf[:runtime.Stack(buf, false)] //获得当前goroutine的stacktrace
golog.Error("server", "onConn", "error", 0,
"remoteAddr", c.RemoteAddr().String(),
"stack", string(buf),
)
}
conn.Close()
s.counter.DecrClientConns()
}()
if allowConnect := conn.IsAllowConnect(); allowConnect == false {
err := mysql.NewError(mysql.ER_ACCESS_DENIED_ERROR, "ip address access denied by kingshard.")
conn.writeError(err)
conn.Close()
return
}
if err := conn.Handshake(); err != nil {
golog.Error("server", "onConn", err.Error(), 0)
c.Close()
return
}
conn.Run()
}
func (c *ClientConn) Handshake() error {
if err := c.writeInitialHandshake(); err != nil {
golog.Error("server", "Handshake", err.Error(),
c.connectionId, "msg", "send initial handshake error")
return err
}
if err := c.readHandshakeResponse(); err != nil {
golog.Error("server", "readHandshakeResponse",
err.Error(), c.connectionId,
"msg", "read Handshake Response error")
c.writeError(err)
return err
}
if err := c.writeOK(nil); err != nil {
golog.Error("server", "readHandshakeResponse",
"write ok fail",
c.connectionId, "error", err.Error())
return err
}
c.pkg.Sequence = 0
return nil
}
func (r *Router) buildReplacePlan(statement sqlparser.Statement) (*Plan, error) {
plan := &Plan{}
plan.Rows = make(map[int]sqlparser.Values)
stmt := statement.(*sqlparser.Replace)
if _, ok := stmt.Rows.(sqlparser.SelectStatement); ok {
panic(sqlparser.NewParserError("select in replace not allowed"))
}
if stmt.Columns == nil {
return nil, errors.ErrIRNoColumns
}
plan.Rule = r.GetRule(sqlparser.String(stmt.Table))
err := plan.GetIRKeyIndex(stmt.Columns)
if err != nil {
return nil, err
}
plan.Criteria = plan.checkValuesType(stmt.Rows.(sqlparser.Values))
err = plan.calRouteIndexs()
if err != nil {
golog.Error("Route", "BuildReplacePlan", err.Error(), 0)
return nil, err
}
err = r.generateReplaceSql(plan, stmt)
if err != nil {
return nil, err
}
return plan, nil
}
func (r *Router) buildSelectPlan(statement sqlparser.Statement) (*Plan, error) {
plan := &Plan{}
var where *sqlparser.Where
var err error
var tableName string
stmt := statement.(*sqlparser.Select)
switch v := (stmt.From[0]).(type) {
case *sqlparser.AliasedTableExpr:
tableName = sqlparser.String(v.Expr)
case *sqlparser.JoinTableExpr:
if ate, ok := (v.LeftExpr).(*sqlparser.AliasedTableExpr); ok {
tableName = sqlparser.String(ate.Expr)
} else {
tableName = sqlparser.String(v)
}
default:
tableName = sqlparser.String(v)
}
plan.Rule = r.GetRule(tableName) //根据表名获得分表规则
where = stmt.Where
if where != nil {
plan.Criteria = where.Expr //路由条件
err = plan.calRouteIndexs()
if err != nil {
golog.Error("Route", "BuildSelectPlan", err.Error(), 0)
return nil, err
}
} else {
//if shard select without where,send to all nodes and all tables
plan.RouteTableIndexs = plan.Rule.SubTableIndexs
plan.RouteNodeIndexs = makeList(0, len(plan.Rule.Nodes))
}
if plan.Rule.Type != DefaultRuleType && len(plan.RouteTableIndexs) == 0 {
golog.Error("Route", "BuildSelectPlan", errors.ErrNoCriteria.Error(), 0)
return nil, errors.ErrNoCriteria
}
//generate sql,如果routeTableindexs为空则表示不分表，不分表则发default node
err = r.generateSelectSql(plan, stmt)
if err != nil {
return nil, err
}
return plan, nil
}
//处理select语句
func (c *ClientConn) handleSelect(stmt *sqlparser.Select, args []interface{}) error {
var fromSlave bool = true
plan, err := c.schema.rule.BuildPlan(stmt)
if err != nil {
return err
}
if 0 < len(stmt.Comments) {
comment := string(stmt.Comments[0])
if 0 < len(comment) && strings.ToLower(comment) == MasterComment {
fromSlave = false
}
}
conns, err := c.getShardConns(fromSlave, plan)
if err != nil {
golog.Error("ClientConn", "handleSelect", err.Error(), c.connectionId)
return err
}
if conns == nil {
r := c.newEmptyResultset(stmt)
return c.writeResultset(c.status, r)
}
var rs []*mysql.Result
rs, err = c.executeInMultiNodes(conns, plan.RewrittenSqls, args)
c.closeShardConns(conns, false)
if err != nil {
golog.Error("ClientConn", "handleSelect", err.Error(), c.connectionId)
return err
}
err = c.mergeSelectResult(rs, stmt)
if err != nil {
golog.Error("ClientConn", "handleSelect", err.Error(), c.connectionId)
}
return err
}
func (c *ClientConn) Run() {
defer func() {
r := recover()
if err, ok := r.(error); ok {
const size = 4096
buf := make([]byte, size)
buf = buf[:runtime.Stack(buf, false)]
golog.Error("ClientConn", "Run",
err.Error(), 0,
"stack", string(buf))
}
c.Close()
}()
for {
data, err := c.readPacket()
if err != nil {
return
}
if err := c.dispatch(data); err != nil {
c.proxy.counter.IncrErrLogTotal()
golog.Error("server", "Run",
err.Error(), c.connectionId,
)
c.writeError(err)
}
if c.closed {
return
}
c.pkg.Sequence = 0
}
}
func (c *ClientConn) getBackendConn(n *backend.Node, fromSlave bool) (co *backend.BackendConn, err error) {
if !c.isInTransaction() {
if fromSlave {
co, err = n.GetSlaveConn()
if err != nil {
co, err = n.GetMasterConn()
}
} else {
co, err = n.GetMasterConn()
}
if err != nil {
golog.Error("server", "getBackendConn", err.Error(), 0)
return
}
} else {
var ok bool
co, ok = c.txConns[n]
if !ok {
if co, err = n.GetMasterConn(); err != nil {
return
}
if !c.isAutoCommit() {
if err = co.SetAutoCommit(0); err != nil {
return
}
} else {
if err = co.Begin(); err != nil {
return
}
}
c.txConns[n] = co
}
}
if err = co.UseDB(c.db); err != nil {
return
}
if err = co.SetCharset(c.charset); err != nil {
return
}
return
}
func (s *Server) Run() error {
s.running = true
// flush counter
go s.flushCounter()
for s.running {
conn, err := s.listener.Accept()
if err != nil {
golog.Error("server", "Run", err.Error(), 0)
continue
}
go s.onConn(conn)
}
return nil
}
func (c *ClientConn) handleSet(stmt *sqlparser.Set, sql string) (err error) {
if len(stmt.Exprs) != 1 && len(stmt.Exprs) != 2 {
return fmt.Errorf("must set one item once, not %s", nstring(stmt))
}
//log the SQL
startTime := time.Now().UnixNano()
defer func() {
var state string
if err != nil {
state = "ERROR"
} else {
state = "OK"
}
execTime := float64(time.Now().UnixNano()-startTime) / float64(time.Millisecond)
if c.proxy.logSql[c.proxy.logSqlIndex] != golog.LogSqlOff &&
execTime > float64(c.proxy.slowLogTime[c.proxy.slowLogTimeIndex]) {
c.proxy.counter.IncrSlowLogTotal()
golog.OutputSql(state, "%.1fms - %s->%s:%s",
execTime,
c.c.RemoteAddr(),
c.proxy.addr,
sql,
)
}
}()
k := string(stmt.Exprs[0].Name.Name)
switch strings.ToUpper(k) {
case `AUTOCOMMIT`:
return c.handleSetAutoCommit(stmt.Exprs[0].Expr)
case `NAMES`, `CHARACTER_SET_RESULTS`, `CHARACTER_SET_CLIENT`, `CHARACTER_SET_CONNECTION`:
if len(stmt.Exprs) == 2 {
//SET NAMES 'charset_name' COLLATE 'collation_name'
return c.handleSetNames(stmt.Exprs[0].Expr, stmt.Exprs[1].Expr)
}
return c.handleSetNames(stmt.Exprs[0].Expr, nil)
default:
golog.Error("ClientConn", "handleSet", "command not supported",
c.connectionId, "sql", sql)
return c.writeOK(nil)
}
}
func (r *Router) buildInsertPlan(statement sqlparser.Statement) (*Plan, error) {
plan := &Plan{}
plan.Rows = make(map[int]sqlparser.Values)
stmt := statement.(*sqlparser.Insert)
if _, ok := stmt.Rows.(sqlparser.SelectStatement); ok {
return nil, errors.ErrSelectInInsert
}
if stmt.Columns == nil {
return nil, errors.ErrIRNoColumns
}
//根据sql语句的表，获得对应的分片规则
plan.Rule = r.GetRule(sqlparser.String(stmt.Table))
err := plan.GetIRKeyIndex(stmt.Columns)
if err != nil {
return nil, err
}
if stmt.OnDup != nil {
err := plan.Rule.checkUpdateExprs(sqlparser.UpdateExprs(stmt.OnDup))
if err != nil {
return nil, err
}
}
plan.Criteria = plan.checkValuesType(stmt.Rows.(sqlparser.Values))
err = plan.calRouteIndexs()
if err != nil {
golog.Error("Route", "BuildInsertPlan", err.Error(), 0)
return nil, err
}
err = r.generateInsertSql(plan, stmt)
if err != nil {
return nil, err
}
return plan, nil
}
func (c *ClientConn) dispatch(data []byte) error {
c.proxy.counter.IncrClientQPS()
cmd := data[0]
data = data[1:]
switch cmd {
case mysql.COM_QUIT:
c.Close()
return nil
case mysql.COM_QUERY:
return c.handleQuery(hack.String(data))
case mysql.COM_PING:
return c.writeOK(nil)
case mysql.COM_INIT_DB:
if err := c.useDB(hack.String(data)); err != nil {
return err
} else {
return c.writeOK(nil)
}
case mysql.COM_FIELD_LIST:
return c.handleFieldList(data)
case mysql.COM_STMT_PREPARE:
return c.handleStmtPrepare(hack.String(data))
case mysql.COM_STMT_EXECUTE:
return c.handleStmtExecute(data)
case mysql.COM_STMT_CLOSE:
return c.handleStmtClose(data)
case mysql.COM_STMT_SEND_LONG_DATA:
return c.handleStmtSendLongData(data)
case mysql.COM_STMT_RESET:
return c.handleStmtReset(data)
case mysql.COM_SET_OPTION:
return c.writeEOF(0)
default:
msg := fmt.Sprintf("command %d not supported now", cmd)
golog.Error("ClientConn", "dispatch", msg, 0)
return mysql.NewError(mysql.ER_UNKNOWN_ERROR, msg)
}
return nil
}
func (c *ClientConn) IsAllowConnect() bool {
clientHost, _, err := net.SplitHostPort(c.c.RemoteAddr().String())
if err != nil {
fmt.Println(err)
}
clientIP := net.ParseIP(clientHost)
ipVec := c.proxy.allowips[c.proxy.allowipsIndex]
if ipVecLen := len(ipVec); ipVecLen == 0 {
return true
}
for _, ip := range ipVec {
if ip.Equal(clientIP) {
return true
}
}
golog.Error("server", "IsAllowConnect", "error", mysql.ER_ACCESS_DENIED_ERROR,
"ip address", c.c.RemoteAddr().String(), " access denied by kindshard.")
return false
}
func (s *Server) saveBlackSql() error {
if len(s.cfg.BlsFile) == 0 {
return nil
}
f, err := os.Create(s.cfg.BlsFile)
if err != nil {
golog.Error("Server", "saveBlackSql", "create file error", 0,
"err", err.Error(),
"blacklist_sql_file", s.cfg.BlsFile,
)
return err
}
for _, v := range s.blacklistSqls[s.blacklistSqlsIndex].sqls {
v = v + "\n"
_, err = f.WriteString(v)
if err != nil {
return err
}
}
return nil
}
//计算表下标和node下标
func (plan *Plan) calRouteIndexs() error {
var err error
nodesCount := len(plan.Rule.Nodes)
if plan.Rule.Type == DefaultRuleType {
plan.RouteNodeIndexs = []int{0}
return nil
}
if plan.Criteria == nil { //如果没有分表条件，则是全子表扫描
if plan.Rule.Type != DefaultRuleType {
golog.Error("Plan", "calRouteIndexs", "plan have no criteria", 0,
"type", plan.Rule.Type)
return errors.ErrNoCriteria
}
}
switch criteria := plan.Criteria.(type) {
case sqlparser.Values: //代表insert中values
plan.RouteTableIndexs, err = plan.getInsertTableIndex(criteria)
if err != nil {
return err
}
plan.RouteNodeIndexs = plan.TindexsToNindexs(plan.RouteTableIndexs)
return nil
case sqlparser.BoolExpr:
plan.RouteTableIndexs, err = plan.getTableIndexByBoolExpr(criteria)
if err != nil {
return err
}
plan.RouteNodeIndexs = plan.TindexsToNindexs(plan.RouteTableIndexs)
return nil
default:
plan.RouteTableIndexs = plan.Rule.SubTableIndexs
plan.RouteNodeIndexs = makeList(0, nodesCount)
return nil
}
}
func (c *ClientConn) handlePrepareSelect(stmt *sqlparser.Select, sql string, args []interface{}) error {
defaultRule := c.schema.rule.DefaultRule
if len(defaultRule.Nodes) == 0 {
return errors.ErrNoDefaultNode
}
defaultNode := c.proxy.GetNode(defaultRule.Nodes[0])
//choose connection in slave DB first
conn, err := c.getBackendConn(defaultNode, true)
defer c.closeConn(conn, false)
if err != nil {
return err
}
if conn == nil {
r := c.newEmptyResultset(stmt)
return c.writeResultset(c.status, r)
}
var rs []*mysql.Result
rs, err = c.executeInNode(conn, sql, args)
if err != nil {
golog.Error("ClientConn", "handlePrepareSelect", err.Error(), c.connectionId)
return err
}
status := c.status | rs[0].Status
if rs[0].Resultset != nil {
err = c.writeResultset(status, rs[0].Resultset)
} else {
r := c.newEmptyResultset(stmt)
err = c.writeResultset(status, r)
}
return err
}
func (c *ClientConn) handlePrepareExec(stmt sqlparser.Statement, sql string, args []interface{}) error {
defaultRule := c.schema.rule.DefaultRule
if len(defaultRule.Nodes) == 0 {
return errors.ErrNoDefaultNode
}
defaultNode := c.proxy.GetNode(defaultRule.Nodes[0])
//execute in Master DB
conn, err := c.getBackendConn(defaultNode, false)
defer c.closeConn(conn, false)
if err != nil {
return err
}
if conn == nil {
return c.writeOK(nil)
}
var rs []*mysql.Result
rs, err = c.executeInNode(conn, sql, args)
c.closeConn(conn, false)
if err != nil {
golog.Error("ClientConn", "handlePrepareExec", err.Error(), c.connectionId)
return err
}
status := c.status | rs[0].Status
if rs[0].Resultset != nil {
err = c.writeResultset(status, rs[0].Resultset)
} else {
err = c.writeOK(rs[0])
}
return err
}
func (c *ClientConn) handleExec(stmt sqlparser.Statement, args []interface{}) error {
plan, err := c.schema.rule.BuildPlan(stmt)
if err != nil {
return err
}
conns, err := c.getShardConns(false, plan)
defer c.closeShardConns(conns, err != nil)
if err != nil {
golog.Error("ClientConn", "handleExec", err.Error(), c.connectionId)
return err
}
if conns == nil {
return c.writeOK(nil)
}
var rs []*mysql.Result
rs, err = c.executeInMultiNodes(conns, plan.RewrittenSqls, args)
if err == nil {
err = c.mergeExecResult(rs)
}
return err
}
func (s *Server) parseSchema() error {
schemaCfg := s.cfg.Schema
if len(schemaCfg.Nodes) == 0 {
//fmt.Errorf("schema [%s] must have a node.", schemaCfg.DB)
golog.Error("server", "parser schema", "no schema configured...", 0, s.cfg)
return nil
}
nodes := make(map[string]*backend.Node)
for _, n := range schemaCfg.Nodes {
if s.GetNode(n) == nil {
fmt.Errorf("schema [%s] node [%s] config is not exists.", schemaCfg.DB, n)
return nil
}
if _, ok := nodes[n]; ok {
return fmt.Errorf("schema [%s] node [%s] duplicate.", schemaCfg.DB, n)
}
nodes[n] = s.GetNode(n)
}
rule, err := router.NewRouter(&schemaCfg)
if err != nil {
return err
}
s.schema = &Schema{
db: schemaCfg.DB,
nodes: nodes,
rule: rule,
}
s.db = schemaCfg.DB
return nil
}
func (c *ClientConn) executeInMultiNodes(conns map[string]*backend.BackendConn, sqls map[string][]string, args []interface{}) ([]*mysql.Result, error) {
if len(conns) != len(sqls) {
golog.Error("ClientConn", "executeInMultiNodes", errors.ErrConnNotEqual.Error(), c.connectionId,
"conns", conns,
"sqls", sqls,
)
return nil, errors.ErrConnNotEqual
}
var wg sync.WaitGroup
if len(conns) == 0 {
return nil, errors.ErrNoPlan
}
wg.Add(len(conns))
resultCount := 0
for _, sqlSlice := range sqls {
resultCount += len(sqlSlice)
}
rs := make([]interface{}, resultCount)
f := func(rs []interface{}, i int, execSqls []string, co *backend.BackendConn) {
var state string
for _, v := range execSqls {
startTime := time.Now().UnixNano()
r, err := co.Execute(v, args...)
if err != nil {
state = "ERROR"
rs[i] = err
} else {
state = "OK"
rs[i] = r
}
execTime := float64(time.Now().UnixNano()-startTime) / float64(time.Millisecond)
if c.proxy.logSql[c.proxy.logSqlIndex] != golog.LogSqlOff &&
execTime > float64(c.proxy.slowLogTime[c.proxy.slowLogTimeIndex]) {
c.proxy.counter.IncrSlowLogTotal()
golog.OutputSql(state, "%.1fms - %s->%s:%s",
execTime,
c.c.RemoteAddr(),
co.GetAddr(),
v,
)
}
i++
}
wg.Done()
}
offsert := 0
for nodeName, co := range conns {
s := sqls[nodeName] //[]string
go f(rs, offsert, s, co)
offsert += len(s)
}
wg.Wait()
var err error
r := make([]*mysql.Result, resultCount)
for i, v := range rs {
if e, ok := v.(error); ok {
err = e
break
}
r[i] = rs[i].(*mysql.Result)
}
return r, err
}
func (c *ClientConn) readHandshakeResponse() error {
data, err := c.readPacket()
if err != nil {
return err
}
pos := 0
//capability
c.capability = binary.LittleEndian.Uint32(data[:4])
pos += 4
//skip max packet size
pos += 4
//charset, skip, if you want to use another charset, use set names
//c.collation = CollationId(data[pos])
pos++
//skip reserved 23[00]
pos += 23
//user name
c.user = string(data[pos : pos+bytes.IndexByte(data[pos:], 0)])
pos += len(c.user) + 1
//auth length and auth
authLen := int(data[pos])
pos++
auth := data[pos : pos+authLen]
checkAuth := mysql.CalcPassword(c.salt, []byte(c.proxy.cfg.Password))
if c.user != c.proxy.cfg.User || !bytes.Equal(auth, checkAuth) {
golog.Error("ClientConn", "readHandshakeResponse", "error", 0,
"auth", auth,
"checkAuth", checkAuth,
"client_user", c.user,
"config_set_user", c.proxy.cfg.User,
"passworld", c.proxy.cfg.Password)
return mysql.NewDefaultError(mysql.ER_ACCESS_DENIED_ERROR, c.user, c.c.RemoteAddr().String(), "Yes")
}
pos += authLen
var db string
if c.capability&mysql.CLIENT_CONNECT_WITH_DB > 0 {
if len(data[pos:]) == 0 {
return nil
}
db = string(data[pos : pos+bytes.IndexByte(data[pos:], 0)])
pos += len(c.db) + 1
}
golog.Error("handshake ", "response", "db ", 0, db)
if err := c.useDB(db); err != nil {
return err
}
return nil
}
func main() {
fmt.Print(banner)
runtime.GOMAXPROCS(runtime.NumCPU())
flag.Parse()
fmt.Printf("Git commit:%s\n", hack.Version)
fmt.Printf("Build time:%s\n", hack.Compile)
if *version {
return
}
if len(*configFile) == 0 {
fmt.Println("must use a config file")
return
}
cfg, err := config.ParseConfigFile(*configFile)
if err != nil {
fmt.Printf("parse config file error:%v\n", err.Error())
return
}
//when the log file size greater than 1GB, kingshard will generate a new file
if len(cfg.LogPath) != 0 {
sysFilePath := path.Join(cfg.LogPath, sysLogName)
sysFile, err := golog.NewRotatingFileHandler(sysFilePath, MaxLogSize, 1)
if err != nil {
fmt.Printf("new log file error:%v\n", err.Error())
return
}
golog.GlobalSysLogger = golog.New(sysFile, golog.Lfile|golog.Ltime|golog.Llevel)
sqlFilePath := path.Join(cfg.LogPath, sqlLogName)
sqlFile, err := golog.NewRotatingFileHandler(sqlFilePath, MaxLogSize, 1)
if err != nil {
fmt.Printf("new log file error:%v\n", err.Error())
return
}
golog.GlobalSqlLogger = golog.New(sqlFile, golog.Lfile|golog.Ltime|golog.Llevel)
}
if *logLevel != "" {
setLogLevel(*logLevel)
} else {
setLogLevel(cfg.LogLevel)
}
var svr *server.Server
svr, err = server.NewServer(cfg)
if err != nil {
golog.Error("main", "main", err.Error(), 0)
golog.GlobalSysLogger.Close()
golog.GlobalSqlLogger.Close()
return
}
sc := make(chan os.Signal, 1)
signal.Notify(sc,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGQUIT)
go func() {
sig := <-sc
golog.Info("main", "main", "Got signal", 0, "signal", sig)
golog.GlobalSysLogger.Close()
golog.GlobalSqlLogger.Close()
svr.Close()
}()
svr.Run()
}
/*处理query语句*/
func (c *ClientConn) handleQuery(sql string) (err error) {
defer func() {
if e := recover(); e != nil {
golog.OutputSql("Error", "err:%v,sql:%s", e, sql)
if err, ok := e.(error); ok {
const size = 4096
buf := make([]byte, size)
buf = buf[:runtime.Stack(buf, false)]
golog.Error("ClientConn", "handleQuery",
err.Error(), 0,
"stack", string(buf), "sql", sql)
}
return
}
}()
sql = strings.TrimRight(sql, ";") //删除sql语句最后的分号
hasHandled, err := c.preHandleShard(sql)
if err != nil {
golog.Error("server", "preHandleShard", err.Error(), 0, "hasHandled", hasHandled)
return err
}
if hasHandled {
return nil
}
var stmt sqlparser.Statement
stmt, err = sqlparser.Parse(sql) //解析sql语句,得到的stmt是一个interface
if err != nil {
golog.Error("server", "parse", err.Error(), 0, "hasHandled", hasHandled, "sql", sql)
return err
}
switch v := stmt.(type) {
case *sqlparser.Select:
return c.handleSelect(v, nil)
case *sqlparser.Insert:
return c.handleExec(stmt, nil)
case *sqlparser.Update:
return c.handleExec(stmt, nil)
case *sqlparser.Delete:
return c.handleExec(stmt, nil)
case *sqlparser.Replace:
return c.handleExec(stmt, nil)
case *sqlparser.Set:
return c.handleSet(v, sql)
case *sqlparser.Begin:
return c.handleBegin()
case *sqlparser.Commit:
return c.handleCommit()
case *sqlparser.Rollback:
return c.handleRollback()
case *sqlparser.Admin:
return c.handleAdmin(v)
case *sqlparser.AdminHelp:
return c.handleAdminHelp(v)
case *sqlparser.UseDB:
return c.handleUseDB(v)
default:
return fmt.Errorf("statement %T not support now", stmt)
}
return nil
}