Golang plan.Selection类代码示例

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本文整理汇总了Golang中github.com/pingcap/tidb/plan.Selection类的典型用法代码示例。如果您正苦于以下问题：Golang Selection类的具体用法？Golang Selection怎么用？Golang Selection使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了Selection类的5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，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: buildSelection

func (b *executorBuilder) buildSelection(v *plan.Selection) Executor {
	child := v.GetChildByIndex(0)
	oldConditions := v.Conditions
	var src Executor
	switch x := child.(type) {
	case *plan.PhysicalTableScan:
		if x.LimitCount == nil {
			src = b.buildNewTableScan(x, v)
		} else {
			src = b.buildNewTableScan(x, nil)
		}
	case *plan.PhysicalIndexScan:
		if x.LimitCount == nil {
			src = b.buildNewIndexScan(x, v)
		} else {
			src = b.buildNewIndexScan(x, nil)
		}
	default:
		src = b.build(x)
	}

	if len(v.Conditions) == 0 {
		v.Conditions = oldConditions
		return src
	}

	exec := &SelectionExec{
		Src:       src,
		Condition: expression.ComposeCNFCondition(v.Conditions),
		schema:    v.GetSchema(),
		ctx:       b.ctx,
	}
	copy(v.Conditions, oldConditions)
	return exec
}

开发者ID:c4pt0r，项目名称:tidb，代码行数:35，代码来源:new_builder.go

示例2: buildSelection

func (b *executorBuilder) buildSelection(v *plan.Selection) Executor {
	exec := &SelectionExec{
		Src:       b.build(v.GetChildByIndex(0)),
		Condition: expression.ComposeCNFCondition(v.Conditions),
		schema:    v.GetSchema(),
		ctx:       b.ctx,
	}
	return exec
}

开发者ID:jmptrader，项目名称:tidb，代码行数:9，代码来源:builder.go

示例3: buildSelection

func (b *executorBuilder) buildSelection(v *plan.Selection) Executor {
	exec := b.build(v.GetChildByIndex(0))
	switch exec.(type) {
	case *NewTableScanExec:
		tableScan := exec.(*NewTableScanExec)
		tableScan.where, v.Conditions = b.toPBExpr(v.Conditions, tableScan.tableInfo)
		// TODO: Implement NewIndexScan
	}

	if len(v.Conditions) == 0 {
		return exec
	}

	return &SelectionExec{
		Src:       exec.(NewExecutor),
		Condition: composeCondition(v.Conditions),
		schema:    v.GetSchema(),
		ctx:       b.ctx,
	}
}

开发者ID:tangfeixiong，项目名称:tidb，代码行数:20，代码来源:new_builder.go

示例4: buildSelection

func (b *executorBuilder) buildSelection(v *plan.Selection) Executor {
	child := v.GetChildByIndex(0)
	var src Executor
	switch x := child.(type) {
	case *plan.PhysicalTableScan:
		src = b.buildNewTableScan(x, v)
	case *plan.PhysicalIndexScan:
		src = b.buildNewIndexScan(x, v)
	default:
		src = b.build(x)
	}

	if len(v.Conditions) == 0 {
		return src
	}

	return &SelectionExec{
		Src:       src,
		Condition: expression.ComposeCNFCondition(v.Conditions),
		schema:    v.GetSchema(),
		ctx:       b.ctx,
	}
}

开发者ID:yubobo，项目名称:tidb，代码行数:23，代码来源:new_builder.go

示例5: buildSelection

func (b *executorBuilder) buildSelection(v *plan.Selection) Executor {
	ts, ok := v.GetChildByIndex(0).(*plan.NewTableScan)
	var src Executor
	if ok {
		src = b.buildNewTableScan(ts, v)
	} else {
		src = b.build(v.GetChildByIndex(0))
	}

	if len(v.Conditions) == 0 {
		return src
	}

	return &SelectionExec{
		Src:       src,
		Condition: expression.ComposeCNFCondition(v.Conditions),
		schema:    v.GetSchema(),
		ctx:       b.ctx,
	}
}

开发者ID:xxwwbb3，项目名称:tidb，代码行数:20，代码来源:new_builder.go

注：本文中的github.com/pingcap/tidb/plan.Selection类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，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。