forked from pingcap/tidb
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request pingcap#900 from nieyy/master
performance_schema: support insert operation
- Loading branch information
Showing
6 changed files
with
355 additions
and
5 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,280 @@ | ||
| // Copyright 2016 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 perfschema | ||
|
|
||
| import ( | ||
| "strings" | ||
| "sync/atomic" | ||
|
|
||
| "github.com/juju/errors" | ||
| "github.com/pingcap/tidb/expression" | ||
| "github.com/pingcap/tidb/model" | ||
| "github.com/pingcap/tidb/table" | ||
| "github.com/pingcap/tidb/util/codec" | ||
| "github.com/syndtr/goleveldb/leveldb" | ||
| ) | ||
|
|
||
| // InsertValues is the rest part of insert/replace into statement. | ||
| type InsertValues struct { | ||
| ColNames []string | ||
| Lists [][]expression.Expression | ||
| TableIdent table.Ident | ||
| Setlist []*expression.Assignment | ||
| } | ||
|
|
||
| // Simulate the behavior of an INSERT statement. | ||
| func (ps *perfSchema) ExecInsert(insertVals *InsertValues) error { | ||
| name := strings.ToUpper(insertVals.TableIdent.Name.O) | ||
| t := ps.getTable(name) | ||
| if t == nil { | ||
| return errors.Errorf("INSERT INTO %s: operation not permitted", insertVals.TableIdent) | ||
| } | ||
|
|
||
| cols, err := ps.getColumns(insertVals, t.Columns) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| rows, err := ps.getRows(insertVals, t, cols) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| return ps.addRecords(name, rows) | ||
| } | ||
|
|
||
| func (ps *perfSchema) addRecords(tbName string, rows [][]interface{}) error { | ||
| var store *leveldb.DB | ||
| var lastLsn uint64 | ||
|
|
||
| // Same as MySQL, we only support INSERT operations for setup_actors & setup_objects. | ||
| switch tbName { | ||
| case TableSetupActors: | ||
| store = ps.stores[TableSetupActors] | ||
| lastLsn = atomic.AddUint64(ps.lsns[TableSetupActors], uint64(len(rows))) | ||
| case TableSetupObjects: | ||
| store = ps.stores[TableSetupObjects] | ||
| lastLsn = atomic.AddUint64(ps.lsns[TableSetupObjects], uint64(len(rows))) | ||
| default: | ||
| return errors.Errorf("INSERT INTO %s.%s: operation not permitted", Name, tbName) | ||
| } | ||
|
|
||
| batch := pool.Get().(*leveldb.Batch) | ||
| defer func() { | ||
| batch.Reset() | ||
| pool.Put(batch) | ||
| }() | ||
|
|
||
| for i, row := range rows { | ||
| lsn := lastLsn - uint64(len(rows)) + uint64(i) | ||
| rawKey := []interface{}{uint64(lsn)} | ||
| key, err := codec.EncodeKey(nil, rawKey...) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| val, err := codec.EncodeValue(nil, row...) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| batch.Put(key, val) | ||
| } | ||
|
|
||
| err := store.Write(batch, nil) | ||
| return errors.Trace(err) | ||
| } | ||
|
|
||
| func checkValueCount(insertVals *InsertValues, insertValueCount, valueCount, num int, cols []*model.ColumnInfo) error { | ||
| if insertValueCount != valueCount { | ||
| // "insert into t values (), ()" is valid. | ||
| // "insert into t values (), (1)" is not valid. | ||
| // "insert into t values (1), ()" is not valid. | ||
| // "insert into t values (1,2), (1)" is not valid. | ||
| // So the value count must be same for all insert list. | ||
| return errors.Errorf("Column count doesn't match value count at row %d", num+1) | ||
| } | ||
| if valueCount == 0 && len(insertVals.ColNames) > 0 { | ||
| // "insert into t (c1) values ()" is not valid. | ||
| return errors.Errorf("INSERT INTO %s: expected %d value(s), have %d", insertVals.TableIdent, len(insertVals.ColNames), 0) | ||
| } else if valueCount > 0 && valueCount != len(cols) { | ||
| return errors.Errorf("INSERT INTO %s: expected %d value(s), have %d", insertVals.TableIdent, len(cols), valueCount) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func fillRowData(t *model.TableInfo, cols []*model.ColumnInfo, vals []interface{}) ([]interface{}, error) { | ||
| row := make([]interface{}, len(t.Columns)) | ||
| marked := make(map[int]struct{}, len(vals)) | ||
| for i, v := range vals { | ||
| offset := cols[i].Offset | ||
| row[offset] = v | ||
| marked[offset] = struct{}{} | ||
| } | ||
| err := initDefaultValues(t, row, marked) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| if err = castValues(row, cols); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| if err = checkNotNulls(t.Columns, row); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| return row, nil | ||
| } | ||
|
|
||
| func fillValueList(insertVals *InsertValues) error { | ||
| if len(insertVals.Setlist) > 0 { | ||
| if len(insertVals.Lists) > 0 { | ||
| return errors.Errorf("INSERT INTO %s: set type should not use values", insertVals.TableIdent) | ||
| } | ||
|
|
||
| var l []expression.Expression | ||
| for _, v := range insertVals.Setlist { | ||
| l = append(l, v.Expr) | ||
| } | ||
| insertVals.Lists = append(insertVals.Lists, l) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func getColumnDefaultValues(cols []*model.ColumnInfo) (map[interface{}]interface{}, error) { | ||
| defaultValMap := map[interface{}]interface{}{} | ||
| for _, col := range cols { | ||
| if value, ok, err := getColDefaultValue(col); ok { | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| defaultValMap[col.Name.L] = value | ||
| } | ||
| } | ||
|
|
||
| return defaultValMap, nil | ||
| } | ||
|
|
||
| // There are three types of insert statements: | ||
| // 1 insert ... values(...) --> name type column | ||
| // 2 insert ... set x=y... --> set type column | ||
| // 3 insert ... (select ..) --> name type column | ||
| // See: https://dev.mysql.com/doc/refman/5.7/en/insert.html | ||
| func (ps *perfSchema) getColumns(insertVals *InsertValues, tableCols []*model.ColumnInfo) ([]*model.ColumnInfo, error) { | ||
| var cols []*model.ColumnInfo | ||
| var err error | ||
|
|
||
| if len(insertVals.Setlist) > 0 { | ||
| // Process `set` type column. | ||
| columns := make([]string, 0, len(insertVals.Setlist)) | ||
| for _, v := range insertVals.Setlist { | ||
| columns = append(columns, v.ColName) | ||
| } | ||
|
|
||
| cols, err = findCols(tableCols, columns) | ||
| if err != nil { | ||
| return nil, errors.Errorf("INSERT INTO %s: %s", insertVals.TableIdent, err) | ||
| } | ||
|
|
||
| if len(cols) == 0 { | ||
| return nil, errors.Errorf("INSERT INTO %s: empty column", insertVals.TableIdent) | ||
| } | ||
| } else { | ||
| // Process `name` type column. | ||
| cols, err = findCols(tableCols, insertVals.ColNames) | ||
| if err != nil { | ||
| return nil, errors.Errorf("INSERT INTO %s: %s", insertVals.TableIdent, err) | ||
| } | ||
|
|
||
| // If cols are empty, use all columns instead. | ||
| if len(cols) == 0 { | ||
| cols = tableCols | ||
| } | ||
| } | ||
|
|
||
| return cols, nil | ||
| } | ||
|
|
||
| func (ps *perfSchema) getRows(insertVals *InsertValues, t *model.TableInfo, cols []*model.ColumnInfo) (rows [][]interface{}, err error) { | ||
| // process `insert|replace ... set x=y...` | ||
| if err = fillValueList(insertVals); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| evalMap, err := getColumnDefaultValues(cols) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| rows = make([][]interface{}, len(insertVals.Lists)) | ||
| for i, list := range insertVals.Lists { | ||
| if err = checkValueCount(insertVals, len(insertVals.Lists[0]), len(list), i, cols); err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
|
|
||
| vals := make([]interface{}, len(list)) | ||
| for j, expr := range list { | ||
| // For "insert into t values (default)" Default Eval. | ||
| evalMap[expression.ExprEvalDefaultName] = cols[j].Name.O | ||
|
|
||
| vals[j], err = expr.Eval(nil, evalMap) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| } | ||
|
|
||
| rows[i], err = fillRowData(t, cols, vals) | ||
| if err != nil { | ||
| return nil, errors.Trace(err) | ||
| } | ||
| } | ||
| return | ||
| } | ||
|
|
||
| func (ps *perfSchema) getTable(tbName string) *model.TableInfo { | ||
| // Same as MySQL, we only support INSERT operations for setup_actors & setup_objects. | ||
| switch tbName { | ||
| case TableSetupActors: | ||
| case TableSetupObjects: | ||
| default: | ||
| return nil | ||
| } | ||
| return ps.tables[tbName] | ||
| } | ||
|
|
||
| func initDefaultValues(t *model.TableInfo, row []interface{}, marked map[int]struct{}) error { | ||
| var defaultValueCols []*model.ColumnInfo | ||
| for i, c := range t.Columns { | ||
| if row[i] != nil { | ||
| // Column value is not nil, continue. | ||
| continue | ||
| } | ||
| // If the nil value is evaluated in insert list, we will use nil. | ||
| if _, ok := marked[i]; ok { | ||
| continue | ||
| } | ||
|
|
||
| var value interface{} | ||
| value, _, err := getColDefaultValue(c) | ||
| if err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| row[i] = value | ||
| defaultValueCols = append(defaultValueCols, c) | ||
| } | ||
|
|
||
| if err := castValues(row, defaultValueCols); err != nil { | ||
| return errors.Trace(err) | ||
| } | ||
| return nil | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.