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[SQL] Support MySQL window function. (arana-db#688)
* add node config support (arana-db#464) * Support MySQL CAST_CHAR function. * format style * Support MySQL CAST_TIME function. (arana-db#570) * Support MySQL CAST_DATE function. (arana-db#569) * Support MySQL CAST_DATETIME function. (arana-db#568) * Support MySQL CAST_TIME/CAST_DATE/CAST_DATETIME function * Resolve Conversation * Support CREATE TABLE * add: IfNotExists * fix: reformat imports * Resolve Conversation * Support window function: CUME_DIST * Support window function: PERCENT_RANK * Support window function: RANK * Support window function: DENSE_RANK * Support window function: FIRST_VALUE/LAST_VALUE/LAG/LEAD * Support window function: NTH_VALUE/NTILE/ROW_NUMBER * support argument(n) in LAG/LEAD * convert Int64 to Float64 in test case
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 function | ||
|
|
||
| import ( | ||
| "context" | ||
| ) | ||
|
|
||
| import ( | ||
| "github.com/pkg/errors" | ||
| ) | ||
|
|
||
| import ( | ||
| "github.com/arana-db/arana/pkg/proto" | ||
| ) | ||
|
|
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| // FuncCumeDist is https://dev.mysql.com/doc/refman/8.0/en/window-function-descriptions.html | ||
| const FuncCumeDist = "CUME_DIST" | ||
|
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| var _ proto.Func = (*cumedistFunc)(nil) | ||
|
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| func init() { | ||
| proto.RegisterFunc(FuncCumeDist, cumedistFunc{}) | ||
| } | ||
|
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| type cumedistFunc struct{} | ||
|
|
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| func (a cumedistFunc) Apply(ctx context.Context, inputs ...proto.Valuer) (proto.Value, error) { | ||
| first, err := inputs[0].Value(ctx) | ||
| if first == nil || err != nil { | ||
| return nil, errors.Wrapf(err, "cannot eval %s", FuncCumeDist) | ||
| } | ||
| firstDec, _ := first.Float64() | ||
| firstNum := 0 | ||
|
|
||
| for _, it := range inputs[1:] { | ||
| val, err := it.Value(ctx) | ||
| if val == nil || err != nil { | ||
| return nil, errors.Wrapf(err, "cannot eval %s", FuncCumeDist) | ||
| } | ||
| valDec, _ := val.Float64() | ||
|
|
||
| if valDec <= firstDec { | ||
| firstNum++ | ||
| } | ||
| } | ||
|
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| r := 0.0 | ||
| if len(inputs) > 1 { | ||
| r = float64(firstNum) / float64(len(inputs)-1) | ||
| } | ||
| return proto.NewValueFloat64(r), nil | ||
| } | ||
|
|
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| func (a cumedistFunc) NumInput() int { | ||
| return 0 | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 function | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "testing" | ||
| ) | ||
|
|
||
| import ( | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| import ( | ||
| "github.com/arana-db/arana/pkg/proto" | ||
| ) | ||
|
|
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| func TestFuncCumeDist(t *testing.T) { | ||
| fn := proto.MustGetFunc(FuncCumeDist) | ||
| type tt struct { | ||
| inputs []proto.Value | ||
| want string | ||
| } | ||
| for _, v := range []tt{ | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "0.2222222222222222", | ||
| }, | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "0.3333333333333333", | ||
| }, | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "0.6666666666666666", | ||
| }, | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "0.8888888888888888", | ||
| }, | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(5), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "1", | ||
| }, | ||
| } { | ||
| t.Run(v.want, func(t *testing.T) { | ||
| var inputs []proto.Valuer | ||
| for i := range v.inputs { | ||
| inputs = append(inputs, proto.ToValuer(v.inputs[i])) | ||
| } | ||
| out, err := fn.Apply(context.Background(), inputs...) | ||
| assert.NoError(t, err) | ||
| assert.Equal(t, v.want, fmt.Sprint(out)) | ||
| }) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 function | ||
|
|
||
| import ( | ||
| "context" | ||
| ) | ||
|
|
||
| import ( | ||
| "github.com/pkg/errors" | ||
| ) | ||
|
|
||
| import ( | ||
| "github.com/arana-db/arana/pkg/proto" | ||
| ) | ||
|
|
||
| // FuncDenseRank is https://dev.mysql.com/doc/refman/8.0/en/window-function-descriptions.html | ||
| const FuncDenseRank = "DENSE_RANK" | ||
|
|
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| var _ proto.Func = (*denserankFunc)(nil) | ||
|
|
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| func init() { | ||
| proto.RegisterFunc(FuncDenseRank, denserankFunc{}) | ||
| } | ||
|
|
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| type denserankFunc struct{} | ||
|
|
||
| func (a denserankFunc) Apply(ctx context.Context, inputs ...proto.Valuer) (proto.Value, error) { | ||
| first, err := inputs[0].Value(ctx) | ||
| if first == nil || err != nil { | ||
| return nil, errors.Wrapf(err, "cannot eval %s", FuncDenseRank) | ||
| } | ||
| firstDec, _ := first.Float64() | ||
| secondDec := firstDec | ||
| firstNum := 0 | ||
|
|
||
| for _, it := range inputs[1:] { | ||
| val, err := it.Value(ctx) | ||
| if val == nil || err != nil { | ||
| return nil, errors.Wrapf(err, "cannot eval %s", FuncDenseRank) | ||
| } | ||
| valDec, _ := val.Float64() | ||
|
|
||
| if valDec < firstDec && valDec != secondDec { | ||
| firstNum++ | ||
| secondDec = valDec | ||
| } | ||
| } | ||
|
|
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| return proto.NewValueInt64(int64(firstNum) + 1), nil | ||
| } | ||
|
|
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| func (a denserankFunc) NumInput() int { | ||
| return 0 | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You 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 function | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "testing" | ||
| ) | ||
|
|
||
| import ( | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| import ( | ||
| "github.com/arana-db/arana/pkg/proto" | ||
| ) | ||
|
|
||
| func TestFuncDenseRankt(t *testing.T) { | ||
| fn := proto.MustGetFunc(FuncDenseRank) | ||
| type tt struct { | ||
| inputs []proto.Value | ||
| want string | ||
| } | ||
| for _, v := range []tt{ | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "1", | ||
| }, | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "2", | ||
| }, | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "3", | ||
| }, | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "4", | ||
| }, | ||
| { | ||
| []proto.Value{ | ||
| proto.NewValueFloat64(5), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(1), | ||
| proto.NewValueFloat64(2), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(3), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(4), | ||
| proto.NewValueFloat64(5), | ||
| }, | ||
| "5", | ||
| }, | ||
| } { | ||
| t.Run(v.want, func(t *testing.T) { | ||
| var inputs []proto.Valuer | ||
| for i := range v.inputs { | ||
| inputs = append(inputs, proto.ToValuer(v.inputs[i])) | ||
| } | ||
| out, err := fn.Apply(context.Background(), inputs...) | ||
| assert.NoError(t, err) | ||
| assert.Equal(t, v.want, fmt.Sprint(out)) | ||
| }) | ||
| } | ||
| } |
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