Пример #1
0
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
}
Пример #2
0
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
}
Пример #3
0
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,
	}
}
Пример #4
0
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,
	}
}
Пример #5
0
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,
	}
}