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wangxiaoxiong
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194 changes: 194 additions & 0 deletions
194
pkg/datasource/sql/undo/builder/mysql_multi_delete_undo_log_builder.go
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/* | ||
* Licensed to the Apache Software Foundation (ASF) under one or more | ||
* contributor license agreements. See the NOTICE file distributed with | ||
* this work for additional information regarding copyright ownership. | ||
* The ASF licenses this file to You 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. | ||
*/ | ||
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package builder | ||
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import ( | ||
"bytes" | ||
"context" | ||
"database/sql/driver" | ||
"strings" | ||
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"github.com/arana-db/parser/ast" | ||
"github.com/arana-db/parser/format" | ||
"github.com/seata/seata-go/pkg/datasource/sql/parser" | ||
"github.com/seata/seata-go/pkg/datasource/sql/types" | ||
"github.com/seata/seata-go/pkg/datasource/sql/undo" | ||
"github.com/seata/seata-go/pkg/util/log" | ||
) | ||
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func init() { | ||
undo.RegisterUndoLogBuilder(types.MultiDeleteExecutor, GetMySQLMultiDeleteUndoLogBuilder) | ||
} | ||
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type multiDelete struct { | ||
sql string | ||
clear bool | ||
} | ||
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type MySQLMultiDeleteUndoLogBuilder struct { | ||
BasicUndoLogBuilder | ||
} | ||
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func GetMySQLMultiDeleteUndoLogBuilder() undo.UndoLogBuilder { | ||
return &MySQLMultiDeleteUndoLogBuilder{BasicUndoLogBuilder: BasicUndoLogBuilder{}} | ||
} | ||
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func (u *MySQLMultiDeleteUndoLogBuilder) BeforeImage(ctx context.Context, execCtx *types.ExecContext) ([]*types.RecordImage, error) { | ||
deletes := strings.Split(execCtx.Query, ";") | ||
if len(deletes) == 1 { | ||
return GetMySQLDeleteUndoLogBuilder().BeforeImage(ctx, execCtx) | ||
} | ||
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values := make([]driver.Value, 0, len(execCtx.NamedValues)*2) | ||
if execCtx.Values == nil { | ||
for n, param := range execCtx.NamedValues { | ||
values[n] = param.Value | ||
} | ||
} | ||
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multiQuery, args, err := u.buildBeforeImageSQL(deletes, values) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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var ( | ||
stmt driver.Stmt | ||
rows driver.Rows | ||
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record *types.RecordImage | ||
records []*types.RecordImage | ||
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meDataMap = execCtx.MetaDataMap[execCtx.ParseContext.DeleteStmt. | ||
TableRefs.TableRefs.Left.(*ast.TableSource).Source.(*ast.TableName).Name.O] | ||
) | ||
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for _, sql := range multiQuery { | ||
stmt, err = execCtx.Conn.Prepare(sql) | ||
if err != nil { | ||
log.Errorf("build prepare stmt: %+v", err) | ||
return nil, err | ||
} | ||
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rows, err = stmt.Query(args) | ||
if err != nil { | ||
log.Errorf("stmt query: %+v", err) | ||
return nil, err | ||
} | ||
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record, err = u.buildRecordImages(rows, meDataMap) | ||
if err != nil { | ||
log.Errorf("record images : %+v", err) | ||
return nil, err | ||
} | ||
records = append(records, record) | ||
} | ||
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return records, nil | ||
} | ||
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func (u *MySQLMultiDeleteUndoLogBuilder) AfterImage(ctx context.Context, execCtx *types.ExecContext, beforeImages []*types.RecordImage) ([]*types.RecordImage, error) { | ||
return nil, nil | ||
} | ||
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// buildBeforeImageSQL build delete sql from delete sql | ||
func (u *MySQLMultiDeleteUndoLogBuilder) buildBeforeImageSQL(multiQuery []string, args []driver.Value) ([]string, []driver.Value, error) { | ||
var ( | ||
err error | ||
buf, param bytes.Buffer | ||
p *types.ParseContext | ||
tableName string | ||
tables = make(map[string]multiDelete, len(multiQuery)) | ||
) | ||
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for _, query := range multiQuery { | ||
p, err = parser.DoParser(query) | ||
if err != nil { | ||
return nil, nil, err | ||
} | ||
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tableName = p.DeleteStmt.TableRefs.TableRefs.Left.(*ast.TableSource).Source.(*ast.TableName).Name.O | ||
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v, ok := tables[tableName] | ||
if ok && v.clear { | ||
continue | ||
} | ||
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buf.WriteString("delete from ") | ||
buf.WriteString(tableName) | ||
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if p.DeleteStmt.Where == nil { | ||
tables[tableName] = multiDelete{sql: buf.String(), clear: true} | ||
buf.Reset() | ||
continue | ||
} else { | ||
buf.WriteString(" where ") | ||
} | ||
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_ = p.DeleteStmt.Where.Restore(format.NewRestoreCtx(format.RestoreKeyWordUppercase, ¶m)) | ||
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v, ok = tables[tableName] | ||
if ok { | ||
buf.Reset() | ||
buf.WriteString(v.sql) | ||
buf.WriteString(" or ") | ||
} | ||
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buf.Write(param.Bytes()) | ||
tables[tableName] = multiDelete{sql: buf.String()} | ||
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buf.Reset() | ||
param.Reset() | ||
} | ||
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var ( | ||
items = make([]string, 0, len(tables)) | ||
values = make([]driver.Value, 0, len(tables)) | ||
selStmt = ast.SelectStmt{ | ||
SelectStmtOpts: &ast.SelectStmtOpts{}, | ||
From: p.DeleteStmt.TableRefs, | ||
Where: p.DeleteStmt.Where, | ||
Fields: &ast.FieldList{Fields: []*ast.SelectField{{WildCard: &ast.WildCardField{}}}}, | ||
OrderBy: p.DeleteStmt.Order, | ||
Limit: p.DeleteStmt.Limit, | ||
TableHints: p.DeleteStmt.TableHints, | ||
LockInfo: &ast.SelectLockInfo{LockType: ast.SelectLockForUpdate}, | ||
} | ||
) | ||
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for _, table := range tables { | ||
p, _ = parser.DoParser(table.sql) | ||
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selStmt.From = p.DeleteStmt.TableRefs | ||
selStmt.Where = p.DeleteStmt.Where | ||
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_ = selStmt.Restore(format.NewRestoreCtx(format.RestoreKeyWordUppercase, &buf)) | ||
items = append(items, buf.String()) | ||
buf.Reset() | ||
if table.clear { | ||
values = append(values, u.buildSelectArgs(&selStmt, nil)...) | ||
} else { | ||
values = append(values, u.buildSelectArgs(&selStmt, args)...) | ||
} | ||
} | ||
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return items, values, nil | ||
} | ||
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func (u *MySQLMultiDeleteUndoLogBuilder) GetExecutorType() types.ExecutorType { | ||
return types.MultiDeleteExecutor | ||
} |
65 changes: 65 additions & 0 deletions
65
pkg/datasource/sql/undo/builder/mysql_multi_delete_undo_log_builder_test.go
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@@ -0,0 +1,65 @@ | ||
/* | ||
* Licensed to the Apache Software Foundation (ASF) under one or more | ||
* contributor license agreements. See the NOTICE file distributed with | ||
* this work for additional information regarding copyright ownership. | ||
* The ASF licenses this file to You 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. | ||
*/ | ||
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package builder | ||
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import ( | ||
"testing" | ||
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"database/sql/driver" | ||
"github.com/stretchr/testify/assert" | ||
) | ||
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func TestBuildSelectSQLByMultiDelete(t *testing.T) { | ||
tests := []struct { | ||
name string | ||
sourceQuery []string | ||
sourceQueryArgs []driver.Value | ||
expectQuery string | ||
expectQueryArgs []driver.Value | ||
}{ | ||
{ | ||
sourceQuery: []string{"delete from table_update_executor_test where id = ?", "delete from table_update_executor_test"}, | ||
sourceQueryArgs: []driver.Value{3}, | ||
expectQuery: "SELECT SQL_NO_CACHE * FROM table_update_executor_test FOR UPDATE", | ||
expectQueryArgs: []driver.Value{}, | ||
}, | ||
{ | ||
sourceQuery: []string{"delete from table_update_executor_test2 where id = ?", "delete from table_update_executor_test2 where id = ?"}, | ||
sourceQueryArgs: []driver.Value{3, 2}, | ||
expectQuery: "SELECT SQL_NO_CACHE * FROM table_update_executor_test2 where id =? or id=? FOR UPDATE", | ||
expectQueryArgs: []driver.Value{3, 2}, | ||
}, | ||
{ | ||
sourceQuery: []string{"delete from table_update_executor_test2 where id = ?", "delete from table_update_executor_test2 where name = ? and age = ?"}, | ||
sourceQueryArgs: []driver.Value{3, "seata-go", 4}, | ||
expectQuery: "SELECT SQL_NO_CACHE * FROM table_update_executor_test2 where id =? or id=? and age=? FOR UPDATE", | ||
expectQueryArgs: []driver.Value{3, "seata-go", 4}, | ||
}, | ||
} | ||
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var builder = MySQLMultiDeleteUndoLogBuilder{} | ||
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for _, tt := range tests { | ||
t.Run(tt.name, func(t *testing.T) { | ||
items, args, err := builder.buildBeforeImageSQL(tt.sourceQuery, tt.sourceQueryArgs) | ||
assert.Nil(t, err) | ||
assert.Equal(t, 1, len(items)) | ||
assert.Equal(t, tt.expectQueryArgs, args) | ||
}) | ||
} | ||
} |
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