62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
// Copyright 2014 The ql Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSES/QL-LICENSE file.
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// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rsets
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import (
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"fmt"
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"github.com/pingcap/tidb/context"
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"github.com/pingcap/tidb/plan"
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"github.com/pingcap/tidb/plan/plans"
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)
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var (
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_ plan.Planner = (*LimitRset)(nil)
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_ plan.Planner = (*OffsetRset)(nil)
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)
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// OffsetRset is record set for limit offset.
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type OffsetRset struct {
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Count uint64
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Src plan.Plan
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}
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// Plan gets OffsetDefaultPlan.
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func (r *OffsetRset) Plan(ctx context.Context) (plan.Plan, error) {
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return &plans.OffsetDefaultPlan{Count: r.Count, Src: r.Src, Fields: r.Src.GetFields()}, nil
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}
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func (r *OffsetRset) String() string {
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return fmt.Sprintf(" OFFSET %d", r.Count)
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}
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// LimitRset is record set for limit.
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type LimitRset struct {
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Count uint64
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Src plan.Plan
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}
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// Plan gets LimitDefaultPlan.
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func (r *LimitRset) Plan(ctx context.Context) (plan.Plan, error) {
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return &plans.LimitDefaultPlan{Count: r.Count, Src: r.Src, Fields: r.Src.GetFields()}, nil
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}
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func (r *LimitRset) String() string {
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return fmt.Sprintf(" LIMIT %d", r.Count)
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}
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