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operator.go
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/
operator.go
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// Copyright 2021 Matrix Origin
//
// 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 logtail
import (
"github.com/matrixorigin/matrixone/pkg/common/moerr"
"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/catalog"
)
// BoundTableOperator holds a read only reader, knows how to iterate catalog entries.
type BoundTableOperator struct {
catalog *catalog.Catalog
reader *Reader
visitor catalog.Processor
dbID uint64
tableID uint64
scope Scope
}
func NewBoundTableOperator(catalog *catalog.Catalog,
reader *Reader,
scope Scope,
dbID, tableID uint64,
visitor catalog.Processor) *BoundTableOperator {
return &BoundTableOperator{
catalog: catalog,
reader: reader,
visitor: visitor,
tableID: tableID,
dbID: dbID,
scope: scope,
}
}
// Run takes a RespBuilder to visit every table/Object/block touched by all txn
// in the Reader. During the visiting, RespBuiler will fetch information to return logtail entry
func (c *BoundTableOperator) Run() error {
switch c.scope {
case ScopeDatabases:
return c.processDatabases()
case ScopeTables, ScopeColumns:
return c.processTables()
case ScopeUserTables:
return c.processTableData()
default:
panic("unknown logtail collect scope")
}
}
// For normal user table, pick out all dirty blocks and call OnBlock
func (c *BoundTableOperator) processTableData() error {
db, err := c.catalog.GetDatabaseByID(c.dbID)
if err != nil {
return err
}
tbl, err := db.GetTableEntryByID(c.tableID)
if err != nil {
return err
}
dirty := c.reader.GetDirtyByTable(c.dbID, c.tableID)
for _, dirtyObj := range dirty.Objs {
obj, err := tbl.GetObjectByID(dirtyObj.ID)
if err != nil {
if moerr.IsMoErrCode(err, moerr.OkExpectedEOB) {
continue
}
return err
}
if err = c.visitor.OnObject(obj); err != nil {
return err
}
}
tombstones := tbl.GetDeleteList().Copy().Items()
for _, deletes := range tombstones {
err = c.visitor.OnTombstone(deletes)
if err != nil {
return err
}
}
return nil
}
// For mo_database, iterate over all database and call OnBlock.
// TODO: avoid iterating all. For now it is acceptable because all catalog is in
// memory and ddl is much smaller than dml
func (c *BoundTableOperator) processDatabases() error {
if !c.reader.HasCatalogChanges() {
return nil
}
dbIt := c.catalog.MakeDBIt(true)
for ; dbIt.Valid(); dbIt.Next() {
dbentry := dbIt.Get().GetPayload()
if err := c.visitor.OnDatabase(dbentry); err != nil {
return err
}
}
return nil
}
// For mo_table and mo_columns, iterate over all tables and call OnTable
// TODO: avoid iterating all. For now it is acceptable because all catalog is in
// memory and ddl is much smaller than dml
func (c *BoundTableOperator) processTables() error {
if !c.reader.HasCatalogChanges() {
return nil
}
dbIt := c.catalog.MakeDBIt(true)
for ; dbIt.Valid(); dbIt.Next() {
db := dbIt.Get().GetPayload()
tblIt := db.MakeTableIt(true)
for ; tblIt.Valid(); tblIt.Next() {
if err := c.visitor.OnTable(tblIt.Get().GetPayload()); err != nil {
return err
}
}
}
return nil
}