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delete_with_input.go
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delete_with_input.go
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/*
Copyright 2023 The Vitess Authors.
Licensed 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.
*/
package operators
import (
"fmt"
"vitess.io/vitess/go/slice"
"vitess.io/vitess/go/vt/sqlparser"
"vitess.io/vitess/go/vt/vtgate/planbuilder/plancontext"
)
type DeleteWithInput struct {
Source Operator
Delete Operator
cols []*sqlparser.ColName
Offsets []int
noColumns
noPredicates
}
func (d *DeleteWithInput) Clone(inputs []Operator) Operator {
newD := *d
newD.SetInputs(inputs)
return &newD
}
func (d *DeleteWithInput) Inputs() []Operator {
return []Operator{d.Source, d.Delete}
}
func (d *DeleteWithInput) SetInputs(inputs []Operator) {
if len(inputs) != 2 {
panic("unexpected number of inputs for DeleteWithInput operator")
}
d.Source = inputs[0]
d.Delete = inputs[1]
}
func (d *DeleteWithInput) ShortDescription() string {
colStrings := slice.Map(d.cols, func(from *sqlparser.ColName) string {
return sqlparser.String(from)
})
out := ""
for idx, colString := range colStrings {
out += colString
if len(d.Offsets) > idx {
out += fmt.Sprintf(":%d", d.Offsets[idx])
}
out += " "
}
return out
}
func (d *DeleteWithInput) GetOrdering(ctx *plancontext.PlanningContext) []OrderBy {
return nil
}
func (d *DeleteWithInput) planOffsets(ctx *plancontext.PlanningContext) Operator {
for _, col := range d.cols {
offset := d.Source.AddColumn(ctx, true, false, aeWrap(col))
d.Offsets = append(d.Offsets, offset)
}
return d
}
var _ Operator = (*DeleteWithInput)(nil)