b6a95a8cb3
* Dropped unused codekit config * Integrated dynamic and static bindata for public * Ignore public bindata * Add a general generate make task * Integrated flexible public assets into web command * Updated vendoring, added all missiong govendor deps * Made the linter happy with the bindata and dynamic code * Moved public bindata definition to modules directory * Ignoring the new bindata path now * Updated to the new public modules import path * Updated public bindata command and drop the new prefix
500 lines
14 KiB
Go
500 lines
14 KiB
Go
// 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 infoschema
|
|
|
|
import (
|
|
"strings"
|
|
"sync/atomic"
|
|
|
|
"github.com/juju/errors"
|
|
"github.com/pingcap/tidb/kv"
|
|
"github.com/pingcap/tidb/meta"
|
|
"github.com/pingcap/tidb/meta/autoid"
|
|
"github.com/pingcap/tidb/model"
|
|
"github.com/pingcap/tidb/mysql"
|
|
"github.com/pingcap/tidb/perfschema"
|
|
"github.com/pingcap/tidb/table"
|
|
"github.com/pingcap/tidb/terror"
|
|
// import table implementation to init table.TableFromMeta
|
|
_ "github.com/pingcap/tidb/table/tables"
|
|
"github.com/pingcap/tidb/util/types"
|
|
)
|
|
|
|
// InfoSchema is the interface used to retrieve the schema information.
|
|
// It works as a in memory cache and doesn't handle any schema change.
|
|
// InfoSchema is read-only, and the returned value is a copy.
|
|
// TODO: add more methods to retrieve tables and columns.
|
|
type InfoSchema interface {
|
|
SchemaByName(schema model.CIStr) (*model.DBInfo, bool)
|
|
SchemaExists(schema model.CIStr) bool
|
|
TableByName(schema, table model.CIStr) (table.Table, error)
|
|
TableExists(schema, table model.CIStr) bool
|
|
ColumnByName(schema, table, column model.CIStr) (*model.ColumnInfo, bool)
|
|
ColumnExists(schema, table, column model.CIStr) bool
|
|
IndexByName(schema, table, index model.CIStr) (*model.IndexInfo, bool)
|
|
SchemaByID(id int64) (*model.DBInfo, bool)
|
|
TableByID(id int64) (table.Table, bool)
|
|
AllocByID(id int64) (autoid.Allocator, bool)
|
|
ColumnByID(id int64) (*model.ColumnInfo, bool)
|
|
ColumnIndicesByID(id int64) ([]*model.IndexInfo, bool)
|
|
AllSchemaNames() []string
|
|
AllSchemas() []*model.DBInfo
|
|
Clone() (result []*model.DBInfo)
|
|
SchemaTables(schema model.CIStr) []table.Table
|
|
SchemaMetaVersion() int64
|
|
}
|
|
|
|
// Infomation Schema Name.
|
|
const (
|
|
Name = "INFORMATION_SCHEMA"
|
|
)
|
|
|
|
type infoSchema struct {
|
|
schemaNameToID map[string]int64
|
|
tableNameToID map[tableName]int64
|
|
columnNameToID map[columnName]int64
|
|
schemas map[int64]*model.DBInfo
|
|
tables map[int64]table.Table
|
|
tableAllocators map[int64]autoid.Allocator
|
|
columns map[int64]*model.ColumnInfo
|
|
indices map[indexName]*model.IndexInfo
|
|
columnIndices map[int64][]*model.IndexInfo
|
|
|
|
// We should check version when change schema.
|
|
schemaMetaVersion int64
|
|
}
|
|
|
|
var _ InfoSchema = (*infoSchema)(nil)
|
|
|
|
type tableName struct {
|
|
schema string
|
|
table string
|
|
}
|
|
|
|
type columnName struct {
|
|
tableName
|
|
name string
|
|
}
|
|
|
|
type indexName struct {
|
|
tableName
|
|
name string
|
|
}
|
|
|
|
func (is *infoSchema) SchemaByName(schema model.CIStr) (val *model.DBInfo, ok bool) {
|
|
id, ok := is.schemaNameToID[schema.L]
|
|
if !ok {
|
|
return
|
|
}
|
|
val, ok = is.schemas[id]
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) SchemaMetaVersion() int64 {
|
|
return is.schemaMetaVersion
|
|
}
|
|
|
|
func (is *infoSchema) SchemaExists(schema model.CIStr) bool {
|
|
_, ok := is.schemaNameToID[schema.L]
|
|
return ok
|
|
}
|
|
|
|
func (is *infoSchema) TableByName(schema, table model.CIStr) (t table.Table, err error) {
|
|
id, ok := is.tableNameToID[tableName{schema: schema.L, table: table.L}]
|
|
if !ok {
|
|
return nil, TableNotExists.Gen("table %s.%s does not exist", schema, table)
|
|
}
|
|
t = is.tables[id]
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) TableExists(schema, table model.CIStr) bool {
|
|
_, ok := is.tableNameToID[tableName{schema: schema.L, table: table.L}]
|
|
return ok
|
|
}
|
|
|
|
func (is *infoSchema) ColumnByName(schema, table, column model.CIStr) (val *model.ColumnInfo, ok bool) {
|
|
id, ok := is.columnNameToID[columnName{tableName: tableName{schema: schema.L, table: table.L}, name: column.L}]
|
|
if !ok {
|
|
return
|
|
}
|
|
val, ok = is.columns[id]
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) ColumnExists(schema, table, column model.CIStr) bool {
|
|
_, ok := is.columnNameToID[columnName{tableName: tableName{schema: schema.L, table: table.L}, name: column.L}]
|
|
return ok
|
|
}
|
|
|
|
func (is *infoSchema) IndexByName(schema, table, index model.CIStr) (val *model.IndexInfo, ok bool) {
|
|
val, ok = is.indices[indexName{tableName: tableName{schema: schema.L, table: table.L}, name: index.L}]
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) SchemaByID(id int64) (val *model.DBInfo, ok bool) {
|
|
val, ok = is.schemas[id]
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) TableByID(id int64) (val table.Table, ok bool) {
|
|
val, ok = is.tables[id]
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) AllocByID(id int64) (val autoid.Allocator, ok bool) {
|
|
val, ok = is.tableAllocators[id]
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) ColumnByID(id int64) (val *model.ColumnInfo, ok bool) {
|
|
val, ok = is.columns[id]
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) ColumnIndicesByID(id int64) (indices []*model.IndexInfo, ok bool) {
|
|
indices, ok = is.columnIndices[id]
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) AllSchemaNames() (names []string) {
|
|
for _, v := range is.schemas {
|
|
names = append(names, v.Name.O)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) AllSchemas() (schemas []*model.DBInfo) {
|
|
for _, v := range is.schemas {
|
|
schemas = append(schemas, v)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) SchemaTables(schema model.CIStr) (tables []table.Table) {
|
|
di, ok := is.SchemaByName(schema)
|
|
if !ok {
|
|
return
|
|
}
|
|
for _, ti := range di.Tables {
|
|
tables = append(tables, is.tables[ti.ID])
|
|
}
|
|
return
|
|
}
|
|
|
|
func (is *infoSchema) Clone() (result []*model.DBInfo) {
|
|
for _, v := range is.schemas {
|
|
result = append(result, v.Clone())
|
|
}
|
|
return
|
|
}
|
|
|
|
// Handle handles information schema, including getting and setting.
|
|
type Handle struct {
|
|
value atomic.Value
|
|
store kv.Storage
|
|
}
|
|
|
|
// NewHandle creates a new Handle.
|
|
func NewHandle(store kv.Storage) *Handle {
|
|
h := &Handle{
|
|
store: store,
|
|
}
|
|
// init memory tables
|
|
initMemoryTables(store)
|
|
initPerfSchema(store)
|
|
return h
|
|
}
|
|
|
|
func initPerfSchema(store kv.Storage) {
|
|
perfHandle = perfschema.NewPerfHandle(store)
|
|
}
|
|
|
|
func genGlobalID(store kv.Storage) (int64, error) {
|
|
var globalID int64
|
|
err := kv.RunInNewTxn(store, true, func(txn kv.Transaction) error {
|
|
var err error
|
|
globalID, err = meta.NewMeta(txn).GenGlobalID()
|
|
return errors.Trace(err)
|
|
})
|
|
return globalID, errors.Trace(err)
|
|
}
|
|
|
|
var (
|
|
// Information_Schema
|
|
isDB *model.DBInfo
|
|
schemataTbl table.Table
|
|
tablesTbl table.Table
|
|
columnsTbl table.Table
|
|
statisticsTbl table.Table
|
|
charsetTbl table.Table
|
|
collationsTbl table.Table
|
|
filesTbl table.Table
|
|
defTbl table.Table
|
|
profilingTbl table.Table
|
|
nameToTable map[string]table.Table
|
|
|
|
perfHandle perfschema.PerfSchema
|
|
)
|
|
|
|
func setColumnID(meta *model.TableInfo, store kv.Storage) error {
|
|
var err error
|
|
for _, c := range meta.Columns {
|
|
c.ID, err = genGlobalID(store)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func initMemoryTables(store kv.Storage) error {
|
|
// Init Information_Schema
|
|
var (
|
|
err error
|
|
tbl table.Table
|
|
)
|
|
dbID, err := genGlobalID(store)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
nameToTable = make(map[string]table.Table)
|
|
isTables := make([]*model.TableInfo, 0, len(tableNameToColumns))
|
|
for name, cols := range tableNameToColumns {
|
|
meta := buildTableMeta(name, cols)
|
|
isTables = append(isTables, meta)
|
|
meta.ID, err = genGlobalID(store)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
err = setColumnID(meta, store)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
alloc := autoid.NewMemoryAllocator(dbID)
|
|
tbl, err = createMemoryTable(meta, alloc)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
nameToTable[meta.Name.L] = tbl
|
|
}
|
|
schemataTbl = nameToTable[strings.ToLower(tableSchemata)]
|
|
tablesTbl = nameToTable[strings.ToLower(tableTables)]
|
|
columnsTbl = nameToTable[strings.ToLower(tableColumns)]
|
|
statisticsTbl = nameToTable[strings.ToLower(tableStatistics)]
|
|
charsetTbl = nameToTable[strings.ToLower(tableCharacterSets)]
|
|
collationsTbl = nameToTable[strings.ToLower(tableCollations)]
|
|
|
|
// CharacterSets/Collations contain static data. Init them now.
|
|
err = insertData(charsetTbl, dataForCharacterSets())
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
err = insertData(collationsTbl, dataForColltions())
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
// create db
|
|
isDB = &model.DBInfo{
|
|
ID: dbID,
|
|
Name: model.NewCIStr(Name),
|
|
Charset: mysql.DefaultCharset,
|
|
Collate: mysql.DefaultCollationName,
|
|
Tables: isTables,
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func insertData(tbl table.Table, rows [][]types.Datum) error {
|
|
for _, r := range rows {
|
|
_, err := tbl.AddRecord(nil, r)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func refillTable(tbl table.Table, rows [][]types.Datum) error {
|
|
err := tbl.Truncate(nil)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
return insertData(tbl, rows)
|
|
}
|
|
|
|
// Set sets DBInfo to information schema.
|
|
func (h *Handle) Set(newInfo []*model.DBInfo, schemaMetaVersion int64) error {
|
|
info := &infoSchema{
|
|
schemaNameToID: map[string]int64{},
|
|
tableNameToID: map[tableName]int64{},
|
|
columnNameToID: map[columnName]int64{},
|
|
schemas: map[int64]*model.DBInfo{},
|
|
tables: map[int64]table.Table{},
|
|
tableAllocators: map[int64]autoid.Allocator{},
|
|
columns: map[int64]*model.ColumnInfo{},
|
|
indices: map[indexName]*model.IndexInfo{},
|
|
columnIndices: map[int64][]*model.IndexInfo{},
|
|
schemaMetaVersion: schemaMetaVersion,
|
|
}
|
|
var err error
|
|
var hasOldInfo bool
|
|
infoschema := h.Get()
|
|
if infoschema != nil {
|
|
hasOldInfo = true
|
|
}
|
|
for _, di := range newInfo {
|
|
info.schemas[di.ID] = di
|
|
info.schemaNameToID[di.Name.L] = di.ID
|
|
for _, t := range di.Tables {
|
|
alloc := autoid.NewAllocator(h.store, di.ID)
|
|
if hasOldInfo {
|
|
val, ok := infoschema.AllocByID(t.ID)
|
|
if ok {
|
|
alloc = val
|
|
}
|
|
}
|
|
info.tableAllocators[t.ID] = alloc
|
|
info.tables[t.ID], err = table.TableFromMeta(alloc, t)
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
tname := tableName{di.Name.L, t.Name.L}
|
|
info.tableNameToID[tname] = t.ID
|
|
for _, c := range t.Columns {
|
|
info.columns[c.ID] = c
|
|
info.columnNameToID[columnName{tname, c.Name.L}] = c.ID
|
|
}
|
|
for _, idx := range t.Indices {
|
|
info.indices[indexName{tname, idx.Name.L}] = idx
|
|
for _, idxCol := range idx.Columns {
|
|
columnID := t.Columns[idxCol.Offset].ID
|
|
columnIndices := info.columnIndices[columnID]
|
|
info.columnIndices[columnID] = append(columnIndices, idx)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Build Information_Schema
|
|
info.schemaNameToID[isDB.Name.L] = isDB.ID
|
|
info.schemas[isDB.ID] = isDB
|
|
for _, t := range isDB.Tables {
|
|
tbl, ok := nameToTable[t.Name.L]
|
|
if !ok {
|
|
return errors.Errorf("table `%s` is missing.", t.Name)
|
|
}
|
|
info.tables[t.ID] = tbl
|
|
tname := tableName{isDB.Name.L, t.Name.L}
|
|
info.tableNameToID[tname] = t.ID
|
|
for _, c := range t.Columns {
|
|
info.columns[c.ID] = c
|
|
info.columnNameToID[columnName{tname, c.Name.L}] = c.ID
|
|
}
|
|
}
|
|
|
|
// Add Performance_Schema
|
|
psDB := perfHandle.GetDBMeta()
|
|
info.schemaNameToID[psDB.Name.L] = psDB.ID
|
|
info.schemas[psDB.ID] = psDB
|
|
for _, t := range psDB.Tables {
|
|
tbl, ok := perfHandle.GetTable(t.Name.O)
|
|
if !ok {
|
|
return errors.Errorf("table `%s` is missing.", t.Name)
|
|
}
|
|
info.tables[t.ID] = tbl
|
|
tname := tableName{psDB.Name.L, t.Name.L}
|
|
info.tableNameToID[tname] = t.ID
|
|
for _, c := range t.Columns {
|
|
info.columns[c.ID] = c
|
|
info.columnNameToID[columnName{tname, c.Name.L}] = c.ID
|
|
}
|
|
}
|
|
// Should refill some tables in Information_Schema.
|
|
// schemata/tables/columns/statistics
|
|
dbNames := make([]string, 0, len(info.schemas))
|
|
dbInfos := make([]*model.DBInfo, 0, len(info.schemas))
|
|
for _, v := range info.schemas {
|
|
dbNames = append(dbNames, v.Name.L)
|
|
dbInfos = append(dbInfos, v)
|
|
}
|
|
err = refillTable(schemataTbl, dataForSchemata(dbNames))
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
err = refillTable(tablesTbl, dataForTables(dbInfos))
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
err = refillTable(columnsTbl, dataForColumns(dbInfos))
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
err = refillTable(statisticsTbl, dataForStatistics(dbInfos))
|
|
if err != nil {
|
|
return errors.Trace(err)
|
|
}
|
|
h.value.Store(info)
|
|
return nil
|
|
}
|
|
|
|
// Get gets information schema from Handle.
|
|
func (h *Handle) Get() InfoSchema {
|
|
v := h.value.Load()
|
|
schema, _ := v.(InfoSchema)
|
|
return schema
|
|
}
|
|
|
|
// Schema error codes.
|
|
const (
|
|
CodeDbDropExists terror.ErrCode = 1008
|
|
CodeDatabaseNotExists = 1049
|
|
CodeTableNotExists = 1146
|
|
CodeColumnNotExists = 1054
|
|
|
|
CodeDatabaseExists = 1007
|
|
CodeTableExists = 1050
|
|
CodeBadTable = 1051
|
|
)
|
|
|
|
var (
|
|
// DatabaseDropExists returns for drop an unexist database.
|
|
DatabaseDropExists = terror.ClassSchema.New(CodeDbDropExists, "database doesn't exist")
|
|
// DatabaseNotExists returns for database not exists.
|
|
DatabaseNotExists = terror.ClassSchema.New(CodeDatabaseNotExists, "database not exists")
|
|
// TableNotExists returns for table not exists.
|
|
TableNotExists = terror.ClassSchema.New(CodeTableNotExists, "table not exists")
|
|
// ColumnNotExists returns for column not exists.
|
|
ColumnNotExists = terror.ClassSchema.New(CodeColumnNotExists, "field not exists")
|
|
|
|
// DatabaseExists returns for database already exists.
|
|
DatabaseExists = terror.ClassSchema.New(CodeDatabaseExists, "database already exists")
|
|
// TableExists returns for table already exists.
|
|
TableExists = terror.ClassSchema.New(CodeTableExists, "table already exists")
|
|
// TableDropExists returns for drop an unexist table.
|
|
TableDropExists = terror.ClassSchema.New(CodeBadTable, "unknown table")
|
|
)
|
|
|
|
func init() {
|
|
schemaMySQLErrCodes := map[terror.ErrCode]uint16{
|
|
CodeDbDropExists: mysql.ErrDbDropExists,
|
|
CodeDatabaseNotExists: mysql.ErrBadDb,
|
|
CodeTableNotExists: mysql.ErrNoSuchTable,
|
|
CodeColumnNotExists: mysql.ErrBadField,
|
|
CodeDatabaseExists: mysql.ErrDbCreateExists,
|
|
CodeTableExists: mysql.ErrTableExists,
|
|
CodeBadTable: mysql.ErrBadTable,
|
|
}
|
|
terror.ErrClassToMySQLCodes[terror.ClassSchema] = schemaMySQLErrCodes
|
|
}
|