126 lines
4.0 KiB
Go
126 lines
4.0 KiB
Go
// Copyright 2021 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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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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 executor
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import (
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"context"
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"fmt"
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"testing"
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"github.com/pingcap/tidb/executor/internal/exec"
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"github.com/pingcap/tidb/expression"
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"github.com/pingcap/tidb/parser/ast"
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"github.com/pingcap/tidb/parser/mysql"
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plannercore "github.com/pingcap/tidb/planner/core"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/chunk"
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"github.com/pingcap/tidb/util/mock"
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"github.com/stretchr/testify/require"
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)
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func TestNestedLoopApply(t *testing.T) {
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ctx := context.Background()
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sctx := mock.NewContext()
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col0 := &expression.Column{Index: 0, RetType: types.NewFieldType(mysql.TypeLong)}
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col1 := &expression.Column{Index: 1, RetType: types.NewFieldType(mysql.TypeLong)}
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con := &expression.Constant{Value: types.NewDatum(6), RetType: types.NewFieldType(mysql.TypeLong)}
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outerSchema := expression.NewSchema(col0)
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outerExec := buildMockDataSource(mockDataSourceParameters{
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schema: outerSchema,
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rows: 6,
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ctx: sctx,
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genDataFunc: func(row int, typ *types.FieldType) interface{} {
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return int64(row + 1)
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},
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})
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outerExec.prepareChunks()
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innerSchema := expression.NewSchema(col1)
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innerExec := buildMockDataSource(mockDataSourceParameters{
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schema: innerSchema,
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rows: 6,
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ctx: sctx,
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genDataFunc: func(row int, typ *types.FieldType) interface{} {
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return int64(row + 1)
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},
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})
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innerExec.prepareChunks()
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outerFilter := expression.NewFunctionInternal(sctx, ast.LT, types.NewFieldType(mysql.TypeTiny), col0, con)
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innerFilter := outerFilter.Clone()
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otherFilter := expression.NewFunctionInternal(sctx, ast.EQ, types.NewFieldType(mysql.TypeTiny), col0, col1)
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joiner := newJoiner(sctx, plannercore.InnerJoin, false,
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make([]types.Datum, innerExec.Schema().Len()), []expression.Expression{otherFilter},
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exec.RetTypes(outerExec), exec.RetTypes(innerExec), nil, false)
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joinSchema := expression.NewSchema(col0, col1)
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join := &NestedLoopApplyExec{
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BaseExecutor: exec.NewBaseExecutor(sctx, joinSchema, 0),
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outerExec: outerExec,
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innerExec: innerExec,
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outerFilter: []expression.Expression{outerFilter},
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innerFilter: []expression.Expression{innerFilter},
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joiner: joiner,
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ctx: sctx,
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}
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join.innerList = chunk.NewList(exec.RetTypes(innerExec), innerExec.InitCap(), innerExec.MaxChunkSize())
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join.innerChunk = exec.NewFirstChunk(innerExec)
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join.outerChunk = exec.NewFirstChunk(outerExec)
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joinChk := exec.NewFirstChunk(join)
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it := chunk.NewIterator4Chunk(joinChk)
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for rowIdx := 1; ; {
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err := join.Next(ctx, joinChk)
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require.NoError(t, err)
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if joinChk.NumRows() == 0 {
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break
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}
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for row := it.Begin(); row != it.End(); row = it.Next() {
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correctResult := fmt.Sprintf("%v %v", rowIdx, rowIdx)
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obtainedResult := fmt.Sprintf("%v %v", row.GetInt64(0), row.GetInt64(1))
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require.Equal(t, correctResult, obtainedResult)
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rowIdx++
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}
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}
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}
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func TestMoveInfoSchemaToFront(t *testing.T) {
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dbss := [][]string{
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{},
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{"A", "B", "C", "a", "b", "c"},
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{"A", "B", "C", "INFORMATION_SCHEMA"},
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{"A", "B", "INFORMATION_SCHEMA", "a"},
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{"INFORMATION_SCHEMA"},
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{"A", "B", "C", "INFORMATION_SCHEMA", "a", "b"},
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}
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wanted := [][]string{
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{},
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{"A", "B", "C", "a", "b", "c"},
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{"INFORMATION_SCHEMA", "A", "B", "C"},
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{"INFORMATION_SCHEMA", "A", "B", "a"},
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{"INFORMATION_SCHEMA"},
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{"INFORMATION_SCHEMA", "A", "B", "C", "a", "b"},
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}
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for _, dbs := range dbss {
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moveInfoSchemaToFront(dbs)
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}
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for i, dbs := range wanted {
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require.Equal(t, len(dbs), len(dbss[i]))
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for j, db := range dbs {
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require.Equal(t, db, dbss[i][j])
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}
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}
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}
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