func (s *ShowPlan) getTable(ctx context.Context) (table.Table, error) {
is := sessionctx.GetDomain(ctx).InfoSchema()
dbName := model.NewCIStr(s.DBName)
if !is.SchemaExists(dbName) {
// MySQL returns no such table here if database doesn't exist.
return nil, errors.Trace(mysql.NewErr(mysql.ErrNoSuchTable, s.DBName, s.TableName))
}
tbName := model.NewCIStr(s.TableName)
tb, err := is.TableByName(dbName, tbName)
if err != nil {
return nil, errors.Trace(mysql.NewErr(mysql.ErrNoSuchTable, s.DBName, s.TableName))
}
return tb, nil
}
// AppendParam implements IStatement AppendParam method.
func (ts *TiDBStatement) AppendParam(paramID int, data []byte) error {
if paramID >= len(ts.boundParams) {
return mysql.NewErr(mysql.ErrWrongArguments, "stmt_send_longdata")
}
ts.boundParams[paramID] = append(ts.boundParams[paramID], data...)
return nil
}
func (cc *clientConn) handleStmtReset(data []byte) (err error) {
if len(data) < 4 {
return mysql.ErrMalformPacket
}
stmtID := int(binary.LittleEndian.Uint32(data[0:4]))
stmt := cc.ctx.GetStatement(stmtID)
if stmt == nil {
return mysql.NewErr(mysql.ErrUnknownStmtHandler,
strconv.Itoa(stmtID), "stmt_reset")
}
stmt.Reset()
return cc.writeOK()
}
func (cc *clientConn) handleStmtSendLongData(data []byte) (err error) {
if len(data) < 6 {
return mysql.ErrMalformPacket
}
stmtID := int(binary.LittleEndian.Uint32(data[0:4]))
stmt := cc.ctx.GetStatement(stmtID)
if stmt == nil {
return mysql.NewErr(mysql.ErrUnknownStmtHandler,
strconv.Itoa(stmtID), "stmt_send_longdata")
}
paramID := int(binary.LittleEndian.Uint16(data[4:6]))
return stmt.AppendParam(paramID, data[6:])
}
func (cc *clientConn) handleStmtExecute(data []byte) (err error) {
if len(data) < 9 {
return mysql.ErrMalformPacket
}
pos := 0
stmtID := binary.LittleEndian.Uint32(data[0:4])
pos += 4
stmt := cc.ctx.GetStatement(int(stmtID))
if stmt == nil {
return mysql.NewErr(mysql.ErrUnknownStmtHandler,
strconv.FormatUint(uint64(stmtID), 10), "stmt_execute")
}
flag := data[pos]
pos++
//now we only support CURSOR_TYPE_NO_CURSOR flag
if flag != 0 {
return mysql.NewErrf(mysql.ErrUnknown, "unsupported flag %d", flag)
}
//skip iteration-count, always 1
pos += 4
var (
nullBitmaps []byte
paramTypes []byte
paramValues []byte
)
numParams := stmt.NumParams()
args := make([]interface{}, numParams)
if numParams > 0 {
nullBitmapLen := (numParams + 7) >> 3
if len(data) < (pos + nullBitmapLen + 1) {
return mysql.ErrMalformPacket
}
nullBitmaps = data[pos : pos+nullBitmapLen]
pos += nullBitmapLen
//new param bound flag
if data[pos] == 1 {
pos++
if len(data) < (pos + (numParams << 1)) {
return mysql.ErrMalformPacket
}
paramTypes = data[pos : pos+(numParams<<1)]
pos += (numParams << 1)
paramValues = data[pos:]
}
err = parseStmtArgs(args, stmt.BoundParams(), nullBitmaps, paramTypes, paramValues)
if err != nil {
return errors.Trace(err)
}
}
rs, err := stmt.Execute(args...)
if err != nil {
return errors.Trace(err)
}
if rs == nil {
return errors.Trace(cc.writeOK())
}
return errors.Trace(cc.writeResultset(rs, true))
}
