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
}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
}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,
}
}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,
}
}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,
}
}