当前位置: 首页>>代码示例>>Golang>>正文


Golang Context.RollbackTxn方法代码示例

本文整理汇总了Golang中github.com/pingcap/tidb/context.Context.RollbackTxn方法的典型用法代码示例。如果您正苦于以下问题:Golang Context.RollbackTxn方法的具体用法?Golang Context.RollbackTxn怎么用?Golang Context.RollbackTxn使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在github.com/pingcap/tidb/context.Context的用法示例。


在下文中一共展示了Context.RollbackTxn方法的3个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Golang代码示例。

示例1: runStmt

func runStmt(ctx context.Context, s ast.Statement, args ...interface{}) (ast.RecordSet, error) {
	var err error
	var rs ast.RecordSet
	// before every execution, we must clear affectedrows.
	variable.GetSessionVars(ctx).SetAffectedRows(0)
	if s.IsDDL() {
		err = ctx.CommitTxn()
		if err != nil {
			return nil, errors.Trace(err)
		}
	}
	rs, err = s.Exec(ctx)
	// All the history should be added here.
	se := ctx.(*session)
	se.history.add(0, s)
	// MySQL DDL should be auto-commit.
	ac, err1 := autocommit.ShouldAutocommit(ctx)
	if err1 != nil {
		return nil, errors.Trace(err1)
	}
	if s.IsDDL() || ac {
		if err != nil {
			log.Info("RollbackTxn for ddl/autocommit error.")
			ctx.RollbackTxn()
		} else {
			err = ctx.CommitTxn()
		}
	}
	return rs, errors.Trace(err)
}
开发者ID:jmptrader,项目名称:tidb,代码行数:30,代码来源:tidb.go

示例2: runStmt

// runStmt executes the ast.Statement and commit or rollback the current transaction.
func runStmt(ctx context.Context, s ast.Statement) (ast.RecordSet, error) {
	var err error
	var rs ast.RecordSet
	if s.IsDDL() {
		err = ctx.CommitTxn()
		if err != nil {
			return nil, errors.Trace(err)
		}
	}
	rs, err = s.Exec(ctx)
	// All the history should be added here.
	se := ctx.(*session)
	getHistory(ctx).add(0, s)
	// MySQL DDL should be auto-commit.
	if s.IsDDL() || se.sessionVars.ShouldAutocommit() {
		if err != nil {
			log.Info("RollbackTxn for ddl/autocommit error.")
			ctx.RollbackTxn()
		} else {
			err = ctx.CommitTxn()
		}
	}
	return rs, errors.Trace(err)
}
开发者ID:pingcap,项目名称:tidb,代码行数:25,代码来源:tidb.go

示例3: TestColumn

func (s *testColumnSuite) TestColumn(c *C) {
	defer testleak.AfterTest(c)()
	tblInfo := testTableInfo(c, s.d, "t1", 3)
	var ctx context.Context
	ctx = testNewContext(c, s.d)
	defer ctx.RollbackTxn()

	testCreateTable(c, ctx, s.d, s.dbInfo, tblInfo)

	t := testGetTable(c, s.d, s.dbInfo.ID, tblInfo.ID)

	num := 10
	for i := 0; i < num; i++ {
		_, err := t.AddRecord(ctx, types.MakeDatums(i, 10*i, 100*i))
		c.Assert(err, IsNil)
	}

	err := ctx.CommitTxn()
	c.Assert(err, IsNil)

	i := int64(0)
	t.IterRecords(ctx, t.FirstKey(), t.Cols(), func(h int64, data []types.Datum, cols []*table.Column) (bool, error) {
		c.Assert(data, HasLen, 3)
		c.Assert(data[0].GetInt64(), Equals, i)
		c.Assert(data[1].GetInt64(), Equals, 10*i)
		c.Assert(data[2].GetInt64(), Equals, 100*i)
		i++
		return true, nil
	})
	c.Assert(i, Equals, int64(num))

	c.Assert(table.FindCol(t.Cols(), "c4"), IsNil)

	job := testCreateColumn(c, ctx, s.d, s.dbInfo, tblInfo, "c4", &ast.ColumnPosition{Tp: ast.ColumnPositionAfter, RelativeColumn: &ast.ColumnName{Name: model.NewCIStr("c3")}}, 100)
	testCheckJobDone(c, s.d, job, true)

	t = testGetTable(c, s.d, s.dbInfo.ID, tblInfo.ID)
	c.Assert(table.FindCol(t.Cols(), "c4"), NotNil)

	i = int64(0)
	t.IterRecords(ctx, t.FirstKey(), t.Cols(), func(h int64, data []types.Datum, cols []*table.Column) (bool, error) {
		c.Assert(data, HasLen, 4)
		c.Assert(data[0].GetInt64(), Equals, i)
		c.Assert(data[1].GetInt64(), Equals, 10*i)
		c.Assert(data[2].GetInt64(), Equals, 100*i)
		c.Assert(data[3].GetInt64(), Equals, int64(100))
		i++
		return true, nil
	})
	c.Assert(i, Equals, int64(num))

	h, err := t.AddRecord(ctx, types.MakeDatums(11, 12, 13, 14))
	c.Assert(err, IsNil)
	err = ctx.CommitTxn()
	c.Assert(err, IsNil)
	values, err := t.RowWithCols(ctx, h, t.Cols())
	c.Assert(err, IsNil)

	c.Assert(values, HasLen, 4)
	c.Assert(values[3].GetInt64(), Equals, int64(14))

	job = testDropColumn(c, ctx, s.d, s.dbInfo, tblInfo, "c4", false)
	testCheckJobDone(c, s.d, job, false)

	t = testGetTable(c, s.d, s.dbInfo.ID, tblInfo.ID)
	values, err = t.RowWithCols(ctx, h, t.Cols())
	c.Assert(err, IsNil)

	c.Assert(values, HasLen, 3)
	c.Assert(values[2].GetInt64(), Equals, int64(13))

	job = testCreateColumn(c, ctx, s.d, s.dbInfo, tblInfo, "c4", &ast.ColumnPosition{Tp: ast.ColumnPositionNone}, 111)
	testCheckJobDone(c, s.d, job, true)

	t = testGetTable(c, s.d, s.dbInfo.ID, tblInfo.ID)
	values, err = t.RowWithCols(ctx, h, t.Cols())
	c.Assert(err, IsNil)

	c.Assert(values, HasLen, 4)
	c.Assert(values[3].GetInt64(), Equals, int64(111))

	job = testCreateColumn(c, ctx, s.d, s.dbInfo, tblInfo, "c5", &ast.ColumnPosition{Tp: ast.ColumnPositionNone}, 101)
	testCheckJobDone(c, s.d, job, true)

	t = testGetTable(c, s.d, s.dbInfo.ID, tblInfo.ID)
	values, err = t.RowWithCols(ctx, h, t.Cols())
	c.Assert(err, IsNil)

	c.Assert(values, HasLen, 5)
	c.Assert(values[4].GetInt64(), Equals, int64(101))

	job = testCreateColumn(c, ctx, s.d, s.dbInfo, tblInfo, "c6", &ast.ColumnPosition{Tp: ast.ColumnPositionFirst}, 202)
	testCheckJobDone(c, s.d, job, true)

	t = testGetTable(c, s.d, s.dbInfo.ID, tblInfo.ID)
	cols := t.Cols()
	c.Assert(cols, HasLen, 6)
	c.Assert(cols[0].Offset, Equals, 0)
	c.Assert(cols[0].Name.L, Equals, "c6")
	c.Assert(cols[1].Offset, Equals, 1)
//.........这里部分代码省略.........
开发者ID:XuHuaiyu,项目名称:tidb,代码行数:101,代码来源:column_test.go


注:本文中的github.com/pingcap/tidb/context.Context.RollbackTxn方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。