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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| // Copyright 2018 PingCAP, Inc. | ||
| // | ||
| // 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package aggfuncs_test | ||
|
|
||
| import ( | ||
| . "github.com/pingcap/check" | ||
| "github.com/pingcap/tidb/ast" | ||
| "github.com/pingcap/tidb/executor/aggfuncs" | ||
| "github.com/pingcap/tidb/expression" | ||
| "github.com/pingcap/tidb/expression/aggregation" | ||
| "github.com/pingcap/tidb/mysql" | ||
| "github.com/pingcap/tidb/types" | ||
| "github.com/pingcap/tidb/util/chunk" | ||
| ) | ||
|
|
||
| func (s *testSuite) TestMergePartialResult4Count(c *C) { | ||
| srcChk := chunk.NewChunkWithCapacity([]*types.FieldType{types.NewFieldType(mysql.TypeLonglong)}, 5) | ||
| for i := int64(0); i < 5; i++ { | ||
| srcChk.AppendInt64(0, i) | ||
| } | ||
| iter := chunk.NewIterator4Chunk(srcChk) | ||
|
|
||
| desc := &aggregation.AggFuncDesc{ | ||
| Name: ast.AggFuncCount, | ||
| Mode: aggregation.CompleteMode, | ||
| Args: []expression.Expression{&expression.Column{RetType: types.NewFieldType(mysql.TypeLong), Index: 0}}, | ||
| } | ||
| finalDesc := desc.Split([]int{0}) | ||
|
|
||
| // build count func for partial phase. | ||
| partialCountFunc := aggfuncs.Build(s.ctx, desc, 0) | ||
| partialPr1 := partialCountFunc.AllocPartialResult() | ||
|
|
||
| // build final func for final phase. | ||
| finalCountFunc := aggfuncs.Build(s.ctx, finalDesc, 0) | ||
| finalPr := finalCountFunc.AllocPartialResult() | ||
| resultChk := chunk.NewChunkWithCapacity([]*types.FieldType{types.NewFieldType(mysql.TypeLonglong)}, 1) | ||
|
|
||
| // update partial result. | ||
| for row := iter.Begin(); row != iter.End(); row = iter.Next() { | ||
| partialCountFunc.UpdatePartialResult(s.ctx, []chunk.Row{row}, partialPr1) | ||
| } | ||
| partialCountFunc.AppendFinalResult2Chunk(s.ctx, partialPr1, resultChk) | ||
| c.Assert(resultChk.GetRow(0).GetInt64(0), Equals, int64(5)) | ||
|
|
||
| // suppose there are two partial workers. | ||
| partialPr2 := partialPr1 | ||
|
|
||
| // merge two partial results. | ||
| err := finalCountFunc.MergePartialResult(s.ctx, partialPr1, finalPr) | ||
| c.Assert(err, IsNil) | ||
| err = finalCountFunc.MergePartialResult(s.ctx, partialPr2, finalPr) | ||
| c.Assert(err, IsNil) | ||
|
|
||
| resultChk.Reset() | ||
| err = finalCountFunc.AppendFinalResult2Chunk(s.ctx, finalPr, resultChk) | ||
| c.Assert(err, IsNil) | ||
| c.Assert(resultChk.GetRow(0).GetInt64(0), Equals, int64(10)) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // Copyright 2018 PingCAP, Inc. | ||
| // | ||
| // 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package aggfuncs_test | ||
|
|
||
| import ( | ||
| . "github.com/pingcap/check" | ||
| "github.com/pingcap/tidb/ast" | ||
| "github.com/pingcap/tidb/executor/aggfuncs" | ||
| "github.com/pingcap/tidb/expression" | ||
| "github.com/pingcap/tidb/expression/aggregation" | ||
| "github.com/pingcap/tidb/mysql" | ||
| "github.com/pingcap/tidb/types" | ||
| "github.com/pingcap/tidb/util/chunk" | ||
| ) | ||
|
|
||
| func (s *testSuite) TestMergePartialResult4MaxFloat(c *C) { | ||
| srcChk := chunk.NewChunkWithCapacity([]*types.FieldType{types.NewFieldType(mysql.TypeDouble)}, 5) | ||
| for i := int64(0); i < 5; i++ { | ||
| srcChk.AppendFloat64(0, float64(i)) | ||
| } | ||
| iter := chunk.NewIterator4Chunk(srcChk) | ||
|
|
||
| desc := &aggregation.AggFuncDesc{ | ||
| Name: ast.AggFuncMax, | ||
| Mode: aggregation.CompleteMode, | ||
| Args: []expression.Expression{&expression.Column{RetType: types.NewFieldType(mysql.TypeDouble), Index: 0}}, | ||
| RetTp: types.NewFieldType(mysql.TypeDouble), | ||
| } | ||
| finalDesc := desc.Split([]int{0}) | ||
|
|
||
| // build max func for partial phase. | ||
| partialMaxFunc := aggfuncs.Build(s.ctx, desc, 0) | ||
| partialPr1 := partialMaxFunc.AllocPartialResult() | ||
| partialPr2 := partialMaxFunc.AllocPartialResult() | ||
|
|
||
| // build final func for final phase. | ||
| finalMaxFunc := aggfuncs.Build(s.ctx, finalDesc, 0) | ||
| finalPr := finalMaxFunc.AllocPartialResult() | ||
| resultChk := chunk.NewChunkWithCapacity([]*types.FieldType{types.NewFieldType(mysql.TypeDouble)}, 1) | ||
|
|
||
| // update partial result. | ||
| for row := iter.Begin(); row != iter.End(); row = iter.Next() { | ||
| partialMaxFunc.UpdatePartialResult(s.ctx, []chunk.Row{row}, partialPr1) | ||
| } | ||
| partialMaxFunc.AppendFinalResult2Chunk(s.ctx, partialPr1, resultChk) | ||
| c.Assert(resultChk.GetRow(0).GetFloat64(0) == float64(4), IsTrue) | ||
|
|
||
| row := iter.Begin() | ||
| row = iter.Next() | ||
| for row = iter.Next(); row != iter.End(); row = iter.Next() { | ||
| partialMaxFunc.UpdatePartialResult(s.ctx, []chunk.Row{row}, partialPr2) | ||
| } | ||
| resultChk.Reset() | ||
| partialMaxFunc.AppendFinalResult2Chunk(s.ctx, partialPr2, resultChk) | ||
| c.Assert(resultChk.GetRow(0).GetFloat64(0) == float64(4), IsTrue) | ||
|
|
||
| // merge two partial results. | ||
| err := finalMaxFunc.MergePartialResult(s.ctx, partialPr1, finalPr) | ||
| c.Assert(err, IsNil) | ||
| err = finalMaxFunc.MergePartialResult(s.ctx, partialPr2, finalPr) | ||
| c.Assert(err, IsNil) | ||
|
|
||
| resultChk.Reset() | ||
| err = finalMaxFunc.AppendFinalResult2Chunk(s.ctx, finalPr, resultChk) | ||
| c.Assert(err, IsNil) | ||
| c.Assert(resultChk.GetRow(0).GetFloat64(0) == float64(4), IsTrue) | ||
| } |
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