github.com/dolthub/go-mysql-server@v0.18.0/sql/range_column_expr_test.go (about)

     1  // Copyright 2022 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package sql_test
    16  
    17  import (
    18  	"testing"
    19  
    20  	"github.com/stretchr/testify/assert"
    21  
    22  	"github.com/dolthub/go-mysql-server/sql"
    23  	"github.com/dolthub/go-mysql-server/sql/types"
    24  )
    25  
    26  func TestTryIntersect(t *testing.T) {
    27  	res, ok, err := sql.LessThanRangeColumnExpr(6, types.Int8).TryIntersect(sql.GreaterThanRangeColumnExpr(-1, types.Int8))
    28  	assert.NoError(t, err)
    29  	assert.True(t, ok)
    30  	assert.Equal(t, sql.RangeType_OpenOpen, res.Type())
    31  
    32  	res, ok, err = sql.NotNullRangeColumnExpr(types.Int8).TryIntersect(sql.AllRangeColumnExpr(types.Int8))
    33  	assert.NoError(t, err)
    34  	assert.True(t, ok)
    35  	assert.Equal(t, sql.RangeType_GreaterThan, res.Type())
    36  	assert.False(t, sql.RangeCutIsBinding(res.LowerBound))
    37  
    38  	_, ok, err = sql.NotNullRangeColumnExpr(types.Int8).TryIntersect(sql.NullRangeColumnExpr(types.Int8))
    39  	assert.NoError(t, err)
    40  	assert.False(t, ok)
    41  	_, ok, err = sql.NullRangeColumnExpr(types.Int8).TryIntersect(sql.NotNullRangeColumnExpr(types.Int8))
    42  	assert.NoError(t, err)
    43  	assert.False(t, ok)
    44  }
    45  
    46  func TestTryUnion(t *testing.T) {
    47  	res, ok, err := sql.NotNullRangeColumnExpr(types.Int8).TryUnion(sql.NullRangeColumnExpr(types.Int8))
    48  	assert.NoError(t, err)
    49  	assert.True(t, ok)
    50  	assert.Equal(t, sql.RangeType_All, res.Type())
    51  	res, ok, err = sql.NullRangeColumnExpr(types.Int8).TryUnion(sql.NotNullRangeColumnExpr(types.Int8))
    52  	assert.NoError(t, err)
    53  	assert.True(t, ok)
    54  	assert.Equal(t, sql.RangeType_All, res.Type())
    55  }