forked from pingcap/parser
/
charset.go
463 lines (433 loc) · 16 KB
/
charset.go
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// Copyright 2015 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package charset
import (
"strings"
"github.com/pingcap/errors"
"github.com/pingcap/parser/mysql"
"github.com/pingcap/parser/terror"
)
const (
codeCollationCharsetMismatch = terror.ErrCode(mysql.ErrCollationCharsetMismatch)
codeUnknownCollation = terror.ErrCode(mysql.ErrUnknownCollation)
)
var (
ErrUnknownCollation = terror.ClassDDL.New(codeUnknownCollation, mysql.MySQLErrName[mysql.ErrUnknownCollation])
ErrCollationCharsetMismatch = terror.ClassDDL.New(codeCollationCharsetMismatch, mysql.MySQLErrName[mysql.ErrCollationCharsetMismatch])
)
// Charset is a charset.
// Now we only support MySQL.
type Charset struct {
Name string
DefaultCollation string
Collations map[string]*Collation
Desc string
Maxlen int
}
// Collation is a collation.
// Now we only support MySQL.
type Collation struct {
ID int
CharsetName string
Name string
IsDefault bool
}
var charsets = make(map[string]*Charset)
var collationsIDMap = make(map[int]*Collation)
var collationsNameMap = make(map[string]*Collation)
var descs = make([]*Desc, 0, len(charsetInfos))
var supportedCollations = make([]*Collation, 0, len(supportedCollationNames))
// All the supported charsets should be in the following table.
var charsetInfos = []*Charset{
{CharsetUTF8, CollationUTF8, make(map[string]*Collation), "UTF-8 Unicode", 3},
{CharsetUTF8MB4, CollationUTF8MB4, make(map[string]*Collation), "UTF-8 Unicode", 4},
{CharsetASCII, CollationASCII, make(map[string]*Collation), "US ASCII", 1},
{CharsetLatin1, CollationLatin1, make(map[string]*Collation), "Latin1", 1},
{CharsetBin, CollationBin, make(map[string]*Collation), "binary", 1},
}
// All the names supported collations should be in the following table.
var supportedCollationNames = map[string]struct{}{
CollationUTF8: {},
CollationUTF8MB4: {},
CollationASCII: {},
CollationLatin1: {},
CollationBin: {},
}
// Desc is a charset description.
type Desc struct {
Name string
Desc string
DefaultCollation string
Maxlen int
}
// GetSupportedCharsets gets descriptions for all charsets supported so far.
func GetSupportedCharsets() []*Desc {
return descs
}
// GetSupportedCollations gets information for all collations supported so far.
func GetSupportedCollations() []*Collation {
return supportedCollations
}
// ValidCharsetAndCollation checks the charset and the collation validity
// and returns a boolean.
func ValidCharsetAndCollation(cs string, co string) bool {
// We will use utf8 as a default charset.
if cs == "" {
cs = "utf8"
}
cs = strings.ToLower(cs)
c, ok := charsets[cs]
if !ok {
return false
}
if co == "" {
return true
}
co = strings.ToLower(co)
_, ok = c.Collations[co]
if !ok {
return false
}
return true
}
// GetDefaultCollation returns the default collation for charset.
func GetDefaultCollation(charset string) (string, error) {
charset = strings.ToLower(charset)
if charset == CharsetBin {
return CollationBin, nil
}
c, ok := charsets[charset]
if !ok {
return "", errors.Errorf("Unknown charset %s", charset)
}
return c.DefaultCollation, nil
}
// GetDefaultCharsetAndCollate returns the default charset and collation.
func GetDefaultCharsetAndCollate() (string, string) {
return mysql.DefaultCharset, mysql.DefaultCollationName
}
// GetCharsetInfo returns charset and collation for cs as name.
func GetCharsetInfo(cs string) (string, string, error) {
c, ok := charsets[strings.ToLower(cs)]
if !ok {
return "", "", errors.Errorf("Unknown charset %s", cs)
}
return c.Name, c.DefaultCollation, nil
}
// GetCharsetDesc gets charset descriptions in the local charsets.
func GetCharsetDesc(cs string) (*Desc, error) {
switch strings.ToLower(cs) {
case CharsetUTF8:
return descs[0], nil
case CharsetUTF8MB4:
return descs[1], nil
case CharsetASCII:
return descs[2], nil
case CharsetLatin1:
return descs[3], nil
case CharsetBin:
return descs[4], nil
default:
return nil, errors.Errorf("Unknown charset %s", cs)
}
}
// GetCharsetInfoByID returns charset and collation for id as cs_number.
func GetCharsetInfoByID(coID int) (string, string, error) {
if coID == mysql.DefaultCollationID {
return mysql.DefaultCharset, mysql.DefaultCollationName, nil
}
if collation, ok := collationsIDMap[coID]; ok {
return collation.CharsetName, collation.Name, nil
}
return "", "", errors.Errorf("Unknown charset id %d", coID)
}
// GetCollations returns a list for all collations.
func GetCollations() []*Collation {
return collations
}
func GetCollationByName(name string) (*Collation, error) {
collation, ok := collationsNameMap[strings.ToLower(name)]
if !ok {
return nil, ErrUnknownCollation.GenWithStackByArgs(name)
}
return collation, nil
}
const (
// CharsetBin is used for marking binary charset.
CharsetBin = "binary"
// CollationBin is the default collation for CharsetBin.
CollationBin = "binary"
// CharsetUTF8 is the default charset for string types.
CharsetUTF8 = "utf8"
// CollationUTF8 is the default collation for CharsetUTF8.
CollationUTF8 = "utf8_bin"
// CharsetUTF8MB4 represents 4 bytes utf8, which works the same way as utf8 in Go.
CharsetUTF8MB4 = "utf8mb4"
// CollationUTF8MB4 is the default collation for CharsetUTF8MB4.
CollationUTF8MB4 = "utf8mb4_bin"
// CharsetASCII is a subset of UTF8.
CharsetASCII = "ascii"
// CollationASCII is the default collation for CharsetACSII.
CollationASCII = "ascii_bin"
// CharsetLatin1 is a single byte charset.
CharsetLatin1 = "latin1"
// CollationLatin1 is the default collation for CharsetLatin1.
CollationLatin1 = "latin1_bin"
)
var collations = []*Collation{
{1, "big5", "big5_chinese_ci", true},
{2, "latin2", "latin2_czech_cs", false},
{3, "dec8", "dec8_swedish_ci", true},
{4, "cp850", "cp850_general_ci", true},
{5, "latin1", "latin1_german1_ci", false},
{6, "hp8", "hp8_english_ci", true},
{7, "koi8r", "koi8r_general_ci", true},
{8, "latin1", "latin1_swedish_ci", false},
{9, "latin2", "latin2_general_ci", true},
{10, "swe7", "swe7_swedish_ci", true},
{11, "ascii", "ascii_general_ci", false},
{12, "ujis", "ujis_japanese_ci", true},
{13, "sjis", "sjis_japanese_ci", true},
{14, "cp1251", "cp1251_bulgarian_ci", false},
{15, "latin1", "latin1_danish_ci", false},
{16, "hebrew", "hebrew_general_ci", true},
{18, "tis620", "tis620_thai_ci", true},
{19, "euckr", "euckr_korean_ci", true},
{20, "latin7", "latin7_estonian_cs", false},
{21, "latin2", "latin2_hungarian_ci", false},
{22, "koi8u", "koi8u_general_ci", true},
{23, "cp1251", "cp1251_ukrainian_ci", false},
{24, "gb2312", "gb2312_chinese_ci", true},
{25, "greek", "greek_general_ci", true},
{26, "cp1250", "cp1250_general_ci", true},
{27, "latin2", "latin2_croatian_ci", false},
{28, "gbk", "gbk_chinese_ci", true},
{29, "cp1257", "cp1257_lithuanian_ci", false},
{30, "latin5", "latin5_turkish_ci", true},
{31, "latin1", "latin1_german2_ci", false},
{32, "armscii8", "armscii8_general_ci", true},
{33, "utf8", "utf8_general_ci", false},
{34, "cp1250", "cp1250_czech_cs", false},
{35, "ucs2", "ucs2_general_ci", true},
{36, "cp866", "cp866_general_ci", true},
{37, "keybcs2", "keybcs2_general_ci", true},
{38, "macce", "macce_general_ci", true},
{39, "macroman", "macroman_general_ci", true},
{40, "cp852", "cp852_general_ci", true},
{41, "latin7", "latin7_general_ci", true},
{42, "latin7", "latin7_general_cs", false},
{43, "macce", "macce_bin", false},
{44, "cp1250", "cp1250_croatian_ci", false},
{45, "utf8mb4", "utf8mb4_general_ci", false},
{46, "utf8mb4", "utf8mb4_bin", true},
{47, "latin1", "latin1_bin", true},
{48, "latin1", "latin1_general_ci", false},
{49, "latin1", "latin1_general_cs", false},
{50, "cp1251", "cp1251_bin", false},
{51, "cp1251", "cp1251_general_ci", true},
{52, "cp1251", "cp1251_general_cs", false},
{53, "macroman", "macroman_bin", false},
{54, "utf16", "utf16_general_ci", true},
{55, "utf16", "utf16_bin", false},
{56, "utf16le", "utf16le_general_ci", true},
{57, "cp1256", "cp1256_general_ci", true},
{58, "cp1257", "cp1257_bin", false},
{59, "cp1257", "cp1257_general_ci", true},
{60, "utf32", "utf32_general_ci", true},
{61, "utf32", "utf32_bin", false},
{62, "utf16le", "utf16le_bin", false},
{63, "binary", "binary", true},
{64, "armscii8", "armscii8_bin", false},
{65, "ascii", "ascii_bin", true},
{66, "cp1250", "cp1250_bin", false},
{67, "cp1256", "cp1256_bin", false},
{68, "cp866", "cp866_bin", false},
{69, "dec8", "dec8_bin", false},
{70, "greek", "greek_bin", false},
{71, "hebrew", "hebrew_bin", false},
{72, "hp8", "hp8_bin", false},
{73, "keybcs2", "keybcs2_bin", false},
{74, "koi8r", "koi8r_bin", false},
{75, "koi8u", "koi8u_bin", false},
{77, "latin2", "latin2_bin", false},
{78, "latin5", "latin5_bin", false},
{79, "latin7", "latin7_bin", false},
{80, "cp850", "cp850_bin", false},
{81, "cp852", "cp852_bin", false},
{82, "swe7", "swe7_bin", false},
{83, "utf8", "utf8_bin", true},
{84, "big5", "big5_bin", false},
{85, "euckr", "euckr_bin", false},
{86, "gb2312", "gb2312_bin", false},
{87, "gbk", "gbk_bin", false},
{88, "sjis", "sjis_bin", false},
{89, "tis620", "tis620_bin", false},
{90, "ucs2", "ucs2_bin", false},
{91, "ujis", "ujis_bin", false},
{92, "geostd8", "geostd8_general_ci", true},
{93, "geostd8", "geostd8_bin", false},
{94, "latin1", "latin1_spanish_ci", false},
{95, "cp932", "cp932_japanese_ci", true},
{96, "cp932", "cp932_bin", false},
{97, "eucjpms", "eucjpms_japanese_ci", true},
{98, "eucjpms", "eucjpms_bin", false},
{99, "cp1250", "cp1250_polish_ci", false},
{101, "utf16", "utf16_unicode_ci", false},
{102, "utf16", "utf16_icelandic_ci", false},
{103, "utf16", "utf16_latvian_ci", false},
{104, "utf16", "utf16_romanian_ci", false},
{105, "utf16", "utf16_slovenian_ci", false},
{106, "utf16", "utf16_polish_ci", false},
{107, "utf16", "utf16_estonian_ci", false},
{108, "utf16", "utf16_spanish_ci", false},
{109, "utf16", "utf16_swedish_ci", false},
{110, "utf16", "utf16_turkish_ci", false},
{111, "utf16", "utf16_czech_ci", false},
{112, "utf16", "utf16_danish_ci", false},
{113, "utf16", "utf16_lithuanian_ci", false},
{114, "utf16", "utf16_slovak_ci", false},
{115, "utf16", "utf16_spanish2_ci", false},
{116, "utf16", "utf16_roman_ci", false},
{117, "utf16", "utf16_persian_ci", false},
{118, "utf16", "utf16_esperanto_ci", false},
{119, "utf16", "utf16_hungarian_ci", false},
{120, "utf16", "utf16_sinhala_ci", false},
{121, "utf16", "utf16_german2_ci", false},
{122, "utf16", "utf16_croatian_ci", false},
{123, "utf16", "utf16_unicode_520_ci", false},
{124, "utf16", "utf16_vietnamese_ci", false},
{128, "ucs2", "ucs2_unicode_ci", false},
{129, "ucs2", "ucs2_icelandic_ci", false},
{130, "ucs2", "ucs2_latvian_ci", false},
{131, "ucs2", "ucs2_romanian_ci", false},
{132, "ucs2", "ucs2_slovenian_ci", false},
{133, "ucs2", "ucs2_polish_ci", false},
{134, "ucs2", "ucs2_estonian_ci", false},
{135, "ucs2", "ucs2_spanish_ci", false},
{136, "ucs2", "ucs2_swedish_ci", false},
{137, "ucs2", "ucs2_turkish_ci", false},
{138, "ucs2", "ucs2_czech_ci", false},
{139, "ucs2", "ucs2_danish_ci", false},
{140, "ucs2", "ucs2_lithuanian_ci", false},
{141, "ucs2", "ucs2_slovak_ci", false},
{142, "ucs2", "ucs2_spanish2_ci", false},
{143, "ucs2", "ucs2_roman_ci", false},
{144, "ucs2", "ucs2_persian_ci", false},
{145, "ucs2", "ucs2_esperanto_ci", false},
{146, "ucs2", "ucs2_hungarian_ci", false},
{147, "ucs2", "ucs2_sinhala_ci", false},
{148, "ucs2", "ucs2_german2_ci", false},
{149, "ucs2", "ucs2_croatian_ci", false},
{150, "ucs2", "ucs2_unicode_520_ci", false},
{151, "ucs2", "ucs2_vietnamese_ci", false},
{159, "ucs2", "ucs2_general_mysql500_ci", false},
{160, "utf32", "utf32_unicode_ci", false},
{161, "utf32", "utf32_icelandic_ci", false},
{162, "utf32", "utf32_latvian_ci", false},
{163, "utf32", "utf32_romanian_ci", false},
{164, "utf32", "utf32_slovenian_ci", false},
{165, "utf32", "utf32_polish_ci", false},
{166, "utf32", "utf32_estonian_ci", false},
{167, "utf32", "utf32_spanish_ci", false},
{168, "utf32", "utf32_swedish_ci", false},
{169, "utf32", "utf32_turkish_ci", false},
{170, "utf32", "utf32_czech_ci", false},
{171, "utf32", "utf32_danish_ci", false},
{172, "utf32", "utf32_lithuanian_ci", false},
{173, "utf32", "utf32_slovak_ci", false},
{174, "utf32", "utf32_spanish2_ci", false},
{175, "utf32", "utf32_roman_ci", false},
{176, "utf32", "utf32_persian_ci", false},
{177, "utf32", "utf32_esperanto_ci", false},
{178, "utf32", "utf32_hungarian_ci", false},
{179, "utf32", "utf32_sinhala_ci", false},
{180, "utf32", "utf32_german2_ci", false},
{181, "utf32", "utf32_croatian_ci", false},
{182, "utf32", "utf32_unicode_520_ci", false},
{183, "utf32", "utf32_vietnamese_ci", false},
{192, "utf8", "utf8_unicode_ci", false},
{193, "utf8", "utf8_icelandic_ci", false},
{194, "utf8", "utf8_latvian_ci", false},
{195, "utf8", "utf8_romanian_ci", false},
{196, "utf8", "utf8_slovenian_ci", false},
{197, "utf8", "utf8_polish_ci", false},
{198, "utf8", "utf8_estonian_ci", false},
{199, "utf8", "utf8_spanish_ci", false},
{200, "utf8", "utf8_swedish_ci", false},
{201, "utf8", "utf8_turkish_ci", false},
{202, "utf8", "utf8_czech_ci", false},
{203, "utf8", "utf8_danish_ci", false},
{204, "utf8", "utf8_lithuanian_ci", false},
{205, "utf8", "utf8_slovak_ci", false},
{206, "utf8", "utf8_spanish2_ci", false},
{207, "utf8", "utf8_roman_ci", false},
{208, "utf8", "utf8_persian_ci", false},
{209, "utf8", "utf8_esperanto_ci", false},
{210, "utf8", "utf8_hungarian_ci", false},
{211, "utf8", "utf8_sinhala_ci", false},
{212, "utf8", "utf8_german2_ci", false},
{213, "utf8", "utf8_croatian_ci", false},
{214, "utf8", "utf8_unicode_520_ci", false},
{215, "utf8", "utf8_vietnamese_ci", false},
{223, "utf8", "utf8_general_mysql500_ci", false},
{224, "utf8mb4", "utf8mb4_unicode_ci", false},
{225, "utf8mb4", "utf8mb4_icelandic_ci", false},
{226, "utf8mb4", "utf8mb4_latvian_ci", false},
{227, "utf8mb4", "utf8mb4_romanian_ci", false},
{228, "utf8mb4", "utf8mb4_slovenian_ci", false},
{229, "utf8mb4", "utf8mb4_polish_ci", false},
{230, "utf8mb4", "utf8mb4_estonian_ci", false},
{231, "utf8mb4", "utf8mb4_spanish_ci", false},
{232, "utf8mb4", "utf8mb4_swedish_ci", false},
{233, "utf8mb4", "utf8mb4_turkish_ci", false},
{234, "utf8mb4", "utf8mb4_czech_ci", false},
{235, "utf8mb4", "utf8mb4_danish_ci", false},
{236, "utf8mb4", "utf8mb4_lithuanian_ci", false},
{237, "utf8mb4", "utf8mb4_slovak_ci", false},
{238, "utf8mb4", "utf8mb4_spanish2_ci", false},
{239, "utf8mb4", "utf8mb4_roman_ci", false},
{240, "utf8mb4", "utf8mb4_persian_ci", false},
{241, "utf8mb4", "utf8mb4_esperanto_ci", false},
{242, "utf8mb4", "utf8mb4_hungarian_ci", false},
{243, "utf8mb4", "utf8mb4_sinhala_ci", false},
{244, "utf8mb4", "utf8mb4_german2_ci", false},
{245, "utf8mb4", "utf8mb4_croatian_ci", false},
{246, "utf8mb4", "utf8mb4_unicode_520_ci", false},
{247, "utf8mb4", "utf8mb4_vietnamese_ci", false},
{255, "utf8mb4", "utf8mb4_0900_ai_ci", false},
}
// init method always puts to the end of file.
func init() {
for _, c := range charsetInfos {
charsets[c.Name] = c
desc := &Desc{
Name: c.Name,
DefaultCollation: c.DefaultCollation,
Desc: c.Desc,
Maxlen: c.Maxlen,
}
descs = append(descs, desc)
}
for _, c := range collations {
collationsIDMap[c.ID] = c
if _, ok := supportedCollationNames[c.Name]; ok {
supportedCollations = append(supportedCollations, c)
}
if charset, ok := charsets[c.CharsetName]; ok {
charset.Collations[c.Name] = c
}
}
for id, name := range mysql.Collations {
collationsNameMap[name] = collationsIDMap[int(id)]
}
}