consul/vendor/github.com/SAP/go-hdb/internal/protocol/error.go

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2018-06-21 14:49:35 +00:00
/*
Copyright 2014 SAP SE
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package protocol
import (
"fmt"
"github.com/SAP/go-hdb/internal/bufio"
)
const (
sqlStateSize = 5
//bytes of fix length fields mod 8
// - errorCode = 4, errorPosition = 4, errortextLength = 4, errorLevel = 1, sqlState = 5 => 18 bytes
// - 18 mod 8 = 2
fixLength = 2
)
type sqlState [sqlStateSize]byte
type hdbError struct {
errorCode int32
errorPosition int32
errorTextLength int32
errorLevel errorLevel
sqlState sqlState
stmtNo int
errorText []byte
}
// String implements the Stringer interface.
func (e *hdbError) String() string {
return fmt.Sprintf("errorCode %d, errorPosition %d, errorTextLength % d errorLevel %s, sqlState %s stmtNo %d errorText %s",
e.errorCode,
e.errorPosition,
e.errorTextLength,
e.errorLevel,
e.sqlState,
e.stmtNo,
e.errorText,
)
}
// Error implements the Error interface.
func (e *hdbError) Error() string {
if e.stmtNo != -1 {
return fmt.Sprintf("SQL %s %d - %s (statement no: %d)", e.errorLevel, e.errorCode, e.errorText, e.stmtNo)
}
return fmt.Sprintf("SQL %s %d - %s", e.errorLevel, e.errorCode, e.errorText)
}
type hdbErrors struct {
errors []*hdbError
numArg int
idx int
}
// String implements the Stringer interface.
func (e *hdbErrors) String() string {
return e.errors[e.idx].String()
}
// Error implements the golang error interface.
func (e *hdbErrors) Error() string {
return e.errors[e.idx].Error()
}
// NumError implements the driver.Error interface.
func (e *hdbErrors) NumError() int {
return e.numArg
}
// SetIdx implements the driver.Error interface.
func (e *hdbErrors) SetIdx(idx int) {
switch {
case idx < 0:
e.idx = 0
case idx >= e.numArg:
e.idx = e.numArg - 1
default:
e.idx = idx
}
}
// StmtNo implements the driver.Error interface.
func (e *hdbErrors) StmtNo() int {
return e.errors[e.idx].stmtNo
}
// Code implements the driver.Error interface.
func (e *hdbErrors) Code() int {
return int(e.errors[e.idx].errorCode)
}
// Position implements the driver.Error interface.
func (e *hdbErrors) Position() int {
return int(e.errors[e.idx].errorPosition)
}
// Level implements the driver.Error interface.
func (e *hdbErrors) Level() int {
return int(e.errors[e.idx].errorLevel)
}
// Text implements the driver.Error interface.
func (e *hdbErrors) Text() string {
return string(e.errors[e.idx].errorText)
}
// IsWarning implements the driver.Error interface.
func (e *hdbErrors) IsWarning() bool {
return e.errors[e.idx].errorLevel == errorLevelWarning
}
// IsError implements the driver.Error interface.
func (e *hdbErrors) IsError() bool {
return e.errors[e.idx].errorLevel == errorLevelError
}
// IsFatal implements the driver.Error interface.
func (e *hdbErrors) IsFatal() bool {
return e.errors[e.idx].errorLevel == errorLevelFatalError
}
func (e *hdbErrors) setStmtNo(idx, no int) {
if idx >= 0 && idx < e.numArg {
e.errors[idx].stmtNo = no
}
}
func (e *hdbErrors) isWarnings() bool {
for _, _error := range e.errors {
if _error.errorLevel != errorLevelWarning {
return false
}
}
return true
}
func (e *hdbErrors) kind() partKind {
return pkError
}
func (e *hdbErrors) setNumArg(numArg int) {
e.numArg = numArg
}
func (e *hdbErrors) read(rd *bufio.Reader) error {
e.idx = 0 // init error index
if e.errors == nil || e.numArg > cap(e.errors) {
e.errors = make([]*hdbError, e.numArg)
} else {
e.errors = e.errors[:e.numArg]
}
for i := 0; i < e.numArg; i++ {
_error := e.errors[i]
if _error == nil {
_error = new(hdbError)
e.errors[i] = _error
}
_error.stmtNo = -1
_error.errorCode = rd.ReadInt32()
_error.errorPosition = rd.ReadInt32()
_error.errorTextLength = rd.ReadInt32()
_error.errorLevel = errorLevel(rd.ReadInt8())
rd.ReadFull(_error.sqlState[:])
// read error text as ASCII data as some errors return invalid CESU-8 characters
// e.g: SQL HdbError 7 - feature not supported: invalid character encoding: <invaid CESU-8 characters>
// if e.errorText, err = rd.ReadCesu8(int(e.errorTextLength)); err != nil {
// return err
// }
_error.errorText = make([]byte, int(_error.errorTextLength))
rd.ReadFull(_error.errorText)
if trace {
outLogger.Printf("error %d: %s", i, _error)
}
pad := padBytes(int(fixLength + _error.errorTextLength))
if pad != 0 {
rd.Skip(pad)
}
}
return rd.GetError()
}