128 lines
2.8 KiB
Go
128 lines
2.8 KiB
Go
// 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 plans_test
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import (
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb"
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"github.com/pingcap/tidb/context"
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"github.com/pingcap/tidb/expression"
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"github.com/pingcap/tidb/field"
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"github.com/pingcap/tidb/plan"
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"github.com/pingcap/tidb/plan/plans"
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"github.com/pingcap/tidb/rset/rsets"
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"github.com/pingcap/tidb/util/format"
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)
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type testRowData struct {
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id int64
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data []interface{}
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}
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type testTablePlan struct {
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rows []*testRowData
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fields []string
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cursor int
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}
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func (p *testTablePlan) Explain(w format.Formatter) {}
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func (p *testTablePlan) GetFields() []*field.ResultField {
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var ret []*field.ResultField
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for _, fn := range p.fields {
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ret = append(ret, &field.ResultField{
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Name: fn,
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})
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}
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return ret
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}
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func (p *testTablePlan) Filter(ctx context.Context, expr expression.Expression) (plan.Plan, bool, error) {
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return p, false, nil
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}
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func (p *testTablePlan) Next(ctx context.Context) (row *plan.Row, err error) {
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if p.cursor == len(p.rows) {
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return
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}
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row = &plan.Row{
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Data: p.rows[p.cursor].data,
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}
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p.cursor++
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return
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}
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func (p *testTablePlan) Close() error {
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p.cursor = 0
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return nil
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}
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type testLimitSuit struct {
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data []*testRowData
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sess tidb.Session
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}
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var _ = Suite(&testLimitSuit{
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data: []*testRowData{
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{1, []interface{}{10, "10"}},
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{2, []interface{}{10, "20"}},
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{3, []interface{}{10, "30"}},
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{4, []interface{}{40, "40"}},
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{6, []interface{}{60, "60"}},
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},
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})
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func (t *testLimitSuit) SetUpSuite(c *C) {
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store, _ := tidb.NewStore(tidb.EngineGoLevelDBMemory)
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t.sess, _ = tidb.CreateSession(store)
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}
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func (t *testLimitSuit) TestLimit(c *C) {
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tblPlan := &testTablePlan{t.data, []string{"id", "name"}, 0}
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pln := &plans.LimitDefaultPlan{
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Count: 2,
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Src: tblPlan,
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Fields: []*field.ResultField{},
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}
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rset := rsets.Recordset{
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Ctx: t.sess.(context.Context),
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Plan: pln,
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}
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rset.Do(func(data []interface{}) (bool, error) {
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// TODO check result
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return true, nil
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})
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}
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func (t *testLimitSuit) TestOffset(c *C) {
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tblPlan := &testTablePlan{t.data, []string{"id", "name"}, 0}
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pln := &plans.OffsetDefaultPlan{
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Count: 2,
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Src: tblPlan,
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Fields: []*field.ResultField{},
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}
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rset := rsets.Recordset{
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Ctx: t.sess.(context.Context),
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Plan: pln,
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}
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rset.Do(func(data []interface{}) (bool, error) {
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// TODO check result
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return true, nil
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})
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}
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