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logical_props_builder_test.go
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// Copyright 2018 The Cockroach Authors.
//
// 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,
// 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 memo
import (
"fmt"
"testing"
"github.com/cockroachdb/cockroach/pkg/sql/opt"
"github.com/cockroachdb/cockroach/pkg/sql/opt/props"
)
func TestJoinCardinality(t *testing.T) {
c := func(min, max uint32) props.Cardinality {
return props.Cardinality{Min: min, Max: max}
}
type testCase struct {
left props.Cardinality
right props.Cardinality
expected props.Cardinality
}
testCaseGroups := []struct {
joinType opt.Operator
filter string // "true", "false", or "other"
testCases []testCase
}{
{ // Inner join, true filter.
joinType: opt.InnerJoinOp,
filter: "true",
testCases: []testCase{
{left: c(0, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(0, 10), right: c(5, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(5, 10), expected: c(25, 100)},
},
},
{ // Inner join, false filter.
joinType: opt.InnerJoinOp,
filter: "false",
testCases: []testCase{
{left: c(0, 10), right: c(0, 10), expected: c(0, 0)},
{left: c(5, 10), right: c(0, 10), expected: c(0, 0)},
{left: c(0, 10), right: c(5, 10), expected: c(0, 0)},
{left: c(5, 10), right: c(5, 10), expected: c(0, 0)},
},
},
{ // Inner join, other filter.
joinType: opt.InnerJoinOp,
filter: "other",
testCases: []testCase{
{left: c(0, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(0, 10), right: c(5, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(5, 10), expected: c(0, 100)},
},
},
{ // Left join, true filter.
joinType: opt.LeftJoinOp,
filter: "true",
testCases: []testCase{
{left: c(0, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(0, 10), expected: c(5, 100)},
{left: c(0, 10), right: c(5, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(5, 10), expected: c(25, 100)},
},
},
{ // Left join, false filter.
joinType: opt.LeftJoinOp,
filter: "false",
testCases: []testCase{
{left: c(0, 10), right: c(0, 10), expected: c(0, 10)},
{left: c(5, 10), right: c(0, 10), expected: c(5, 10)},
{left: c(0, 10), right: c(5, 10), expected: c(0, 10)},
{left: c(5, 10), right: c(5, 10), expected: c(5, 10)},
},
},
{ // Left join, other filter.
joinType: opt.LeftJoinOp,
filter: "other",
testCases: []testCase{
{left: c(0, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(0, 10), expected: c(5, 100)},
{left: c(0, 10), right: c(5, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(5, 10), expected: c(5, 100)},
},
},
{ // Right join, true filter.
joinType: opt.RightJoinOp,
filter: "true",
testCases: []testCase{
{left: c(0, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(0, 10), right: c(5, 10), expected: c(5, 100)},
{left: c(5, 10), right: c(5, 10), expected: c(25, 100)},
},
},
{ // Right join, false filter.
joinType: opt.RightJoinOp,
filter: "false",
testCases: []testCase{
{left: c(0, 10), right: c(0, 10), expected: c(0, 10)},
{left: c(5, 10), right: c(0, 10), expected: c(0, 10)},
{left: c(0, 10), right: c(5, 10), expected: c(5, 10)},
{left: c(5, 10), right: c(5, 10), expected: c(5, 10)},
},
},
{ // Right join, other filter.
joinType: opt.RightJoinOp,
filter: "other",
testCases: []testCase{
{left: c(0, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(0, 10), right: c(5, 10), expected: c(5, 100)},
{left: c(5, 10), right: c(5, 10), expected: c(5, 100)},
},
},
{ // Full join, true filter.
joinType: opt.FullJoinOp,
filter: "true",
testCases: []testCase{
{left: c(0, 1), right: c(0, 1), expected: c(0, 2)},
{left: c(1, 1), right: c(1, 1), expected: c(1, 2)},
{left: c(0, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(0, 10), expected: c(5, 100)},
{left: c(0, 10), right: c(5, 10), expected: c(5, 100)},
{left: c(5, 10), right: c(5, 10), expected: c(25, 100)},
{left: c(7, 10), right: c(8, 10), expected: c(56, 100)},
{left: c(8, 10), right: c(7, 10), expected: c(56, 100)},
},
},
{ // Full join, false filter.
joinType: opt.FullJoinOp,
filter: "false",
testCases: []testCase{
{left: c(0, 1), right: c(0, 1), expected: c(0, 2)},
{left: c(1, 1), right: c(1, 1), expected: c(2, 2)},
{left: c(2, 5), right: c(3, 8), expected: c(5, 13)},
{left: c(0, 10), right: c(0, 10), expected: c(0, 20)},
{left: c(5, 10), right: c(0, 10), expected: c(5, 20)},
{left: c(0, 10), right: c(5, 10), expected: c(5, 20)},
{left: c(5, 10), right: c(5, 10), expected: c(10, 20)},
{left: c(7, 10), right: c(8, 10), expected: c(15, 20)},
{left: c(8, 10), right: c(7, 10), expected: c(15, 20)},
},
},
{ // Full join, other filter.
joinType: opt.FullJoinOp,
filter: "other",
testCases: []testCase{
{left: c(0, 1), right: c(0, 1), expected: c(0, 2)},
{left: c(1, 1), right: c(1, 1), expected: c(1, 2)},
{left: c(2, 5), right: c(3, 8), expected: c(3, 40)},
{left: c(0, 10), right: c(0, 10), expected: c(0, 100)},
{left: c(5, 10), right: c(0, 10), expected: c(5, 100)},
{left: c(0, 10), right: c(5, 10), expected: c(5, 100)},
{left: c(5, 10), right: c(5, 10), expected: c(5, 100)},
{left: c(7, 10), right: c(8, 10), expected: c(8, 100)},
{left: c(8, 10), right: c(7, 10), expected: c(8, 100)},
},
},
}
for _, group := range testCaseGroups {
t.Run(fmt.Sprintf("%s/%s", group.joinType, group.filter), func(t *testing.T) {
for i, tc := range group.testCases {
t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
h := &joinPropsHelper{}
h.joinType = group.joinType
h.leftProps = &props.Relational{Cardinality: tc.left}
h.rightProps = &props.Relational{Cardinality: tc.right}
h.filterIsTrue = (group.filter == "true")
h.filterIsFalse = (group.filter == "false")
res := h.cardinality()
if res != tc.expected {
t.Errorf(
"left=%s right=%s: expected %s, got %s\n", tc.left, tc.right, tc.expected, res,
)
}
})
}
})
}
}