Golang table.TableFromMeta函数代码示例

// Set sets DBInfo to information schema.
func (h *Handle) Set(newInfo []*model.DBInfo) {
	info := &infoSchema{
		schemaNameToID: map[string]int64{},
		tableNameToID:  map[tableName]int64{},
		columnNameToID: map[columnName]int64{},
		schemas:        map[int64]*model.DBInfo{},
		tables:         map[int64]table.Table{},
		columns:        map[int64]*model.ColumnInfo{},
		indices:        map[indexName]*model.IndexInfo{},
		columnIndices:  map[int64][]*model.IndexInfo{},
	}
	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)
			info.tables[t.ID] = table.TableFromMeta(di.Name.L, alloc, t)
			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)
				}
			}
		}
	}
	h.value.Store(info)
}

func (d *ddl) dropSchemaData(dbInfo *model.DBInfo, tables []*model.TableInfo) error {
	for _, tblInfo := range tables {
		alloc := autoid.NewAllocator(d.store, dbInfo.ID)
		t := table.TableFromMeta(alloc, tblInfo)
		err := d.dropTableData(t)
		if err != nil {
			return errors.Trace(err)
		}
	}
	return nil
}

func testGetTable(c *C, d *ddl, schemaID int64, tableID int64) table.Table {
	var tblInfo *model.TableInfo
	kv.RunInNewTxn(d.store, false, func(txn kv.Transaction) error {
		t := meta.NewMeta(txn)
		var err error
		tblInfo, err = t.GetTable(schemaID, tableID)
		c.Assert(err, IsNil)
		c.Assert(tblInfo, NotNil)
		return nil
	})
	alloc := autoid.NewAllocator(d.store, schemaID)
	tbl := table.TableFromMeta(alloc, tblInfo)
	return tbl
}

// If create table with auto_increment option, we should rebase tableAutoIncID value.
func (d *ddl) handleAutoIncID(tbInfo *model.TableInfo, schemaID int64) error {
	alloc := autoid.NewAllocator(d.store, schemaID)
	tbInfo.State = model.StatePublic
	tb, err := table.TableFromMeta(alloc, tbInfo)
	if err != nil {
		return errors.Trace(err)
	}
	// The operation of the minus 1 to make sure that the current value doesn't be used,
	// the next Alloc operation will get this value.
	// Its behavior is consistent with MySQL.
	if err = tb.RebaseAutoID(tbInfo.AutoIncID-1, false); err != nil {
		return errors.Trace(err)
	}
	return nil
}

func (d *ddl) handleTableOptions(options []*ast.TableOption, tbInfo *model.TableInfo, schemaID int64) error {
	for _, op := range options {
		if op.Tp == ast.TableOptionAutoIncrement {
			alloc := autoid.NewAllocator(d.store, schemaID)
			tbInfo.State = model.StatePublic
			tb, err := table.TableFromMeta(alloc, tbInfo)
			if err != nil {
				return errors.Trace(err)
			}
			// The operation of the minus 1 to make sure that the current value doesn't be used,
			// the next Alloc operation will get this value.
			// Its behavior is consistent with MySQL.
			if err = tb.RebaseAutoID(int64(op.UintValue-1), false); err != nil {
				return errors.Trace(err)
			}
		}
	}

	return nil
}

// 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{},
		columns:           map[int64]*model.ColumnInfo{},
		indices:           map[indexName]*model.IndexInfo{},
		columnIndices:     map[int64][]*model.IndexInfo{},
		schemaMetaVersion: schemaMetaVersion,
	}
	var err error
	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)
			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)
				}
			}
		}
	}
	h.value.Store(info)
	return nil
}

func getCurrentTable(d *ddl, schemaID, tableID int64) (table.Table, error) {
	var tblInfo *model.TableInfo
	err := kv.RunInNewTxn(d.store, false, func(txn kv.Transaction) error {
		t := meta.NewMeta(txn)
		var err error
		tblInfo, err = t.GetTable(schemaID, tableID)
		if err != nil {
			return errors.Trace(err)
		}
		return nil
	})
	if err != nil {
		return nil, errors.Trace(err)
	}
	alloc := autoid.NewAllocator(d.store, schemaID)
	tbl, err := table.TableFromMeta(alloc, tblInfo)
	if err != nil {
		return nil, errors.Trace(err)
	}
	return tbl, err
}

// InitWithDBInfos initializes an empty new InfoSchema with a slice of DBInfo and schema version.
func (b *Builder) InitWithDBInfos(dbInfos []*model.DBInfo, schemaVersion int64) (*Builder, error) {
	err := b.initMemorySchemas()
	if err != nil {
		return nil, errors.Trace(err)
	}
	info := b.is
	info.schemaMetaVersion = schemaVersion
	for _, di := range dbInfos {
		info.schemas[di.ID] = di
		info.schemaNameToID[di.Name.L] = di.ID
		for _, t := range di.Tables {
			alloc := autoid.NewAllocator(b.handle.store, di.ID)
			var tbl table.Table
			tbl, err = table.TableFromMeta(alloc, t)
			if err != nil {
				return nil, errors.Trace(err)
			}
			info.tables[t.ID] = tbl
			tname := makeTableName(di.Name.L, t.Name.L)
			info.tableNameToID[string(tname)] = t.ID
		}
	}
	return b, nil
}

func (d *ddl) getTable(schemaID int64, tblInfo *model.TableInfo) (table.Table, error) {
	alloc := autoid.NewAllocator(d.store, schemaID)
	tbl, err := table.TableFromMeta(alloc, tblInfo)
	return tbl, errors.Trace(err)
}

func (d *ddl) getTable(t *meta.Meta, schemaID int64, tblInfo *model.TableInfo) (table.Table, error) {
	alloc := autoid.NewAllocator(d.store, schemaID)
	tbl := table.TableFromMeta(alloc, tblInfo)
	return tbl, nil
}

// 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[h.memSchema.isDB.Name.L] = h.memSchema.isDB.ID
	info.schemas[h.memSchema.isDB.ID] = h.memSchema.isDB
	for _, t := range h.memSchema.isDB.Tables {
		tbl, ok := h.memSchema.nameToTable[t.Name.L]
		if !ok {
			return ErrTableNotExists.Gen("table `%s` is missing.", t.Name)
		}
		info.tables[t.ID] = tbl
		tname := tableName{h.memSchema.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 := h.memSchema.perfHandle.GetDBMeta()
	info.schemaNameToID[psDB.Name.L] = psDB.ID
	info.schemas[psDB.ID] = psDB
	for _, t := range psDB.Tables {
		tbl, ok := h.memSchema.perfHandle.GetTable(t.Name.O)
		if !ok {
			return ErrTableNotExists.Gen("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(h.memSchema.schemataTbl, dataForSchemata(dbNames))
	if err != nil {
		return errors.Trace(err)
	}
	err = refillTable(h.memSchema.tablesTbl, dataForTables(dbInfos))
	if err != nil {
//.........这里部分代码省略.........