vitess.io/vitess@v0.16.2/go/vt/vtgate/engine/filter_test.go (about)

     1  /*
     2  Copyright 2022 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package engine
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  	"testing"
    23  
    24  	"github.com/stretchr/testify/require"
    25  
    26  	"vitess.io/vitess/go/mysql/collations"
    27  	"vitess.io/vitess/go/sqltypes"
    28  	"vitess.io/vitess/go/vt/sqlparser"
    29  	"vitess.io/vitess/go/vt/vtgate/evalengine"
    30  )
    31  
    32  type dummyTranslator struct{}
    33  
    34  func (d dummyTranslator) ColumnLookup(col *sqlparser.ColName) (int, error) {
    35  	switch col.Name.String() {
    36  	case "left":
    37  		return 0, nil
    38  	case "right":
    39  		return 1, nil
    40  	default:
    41  		panic("unexpected column name")
    42  	}
    43  }
    44  
    45  func (d dummyTranslator) CollationForExpr(_ sqlparser.Expr) collations.ID {
    46  	return collationEnv.LookupByName("utf8mb4_bin").ID()
    47  }
    48  
    49  func (d dummyTranslator) DefaultCollation() collations.ID {
    50  	return collationEnv.LookupByName("utf8mb4_bin").ID()
    51  }
    52  
    53  func TestFilterPass(t *testing.T) {
    54  	predicate := &sqlparser.ComparisonExpr{
    55  		Operator: sqlparser.GreaterThanOp,
    56  		Left:     sqlparser.NewColName("left"),
    57  		Right:    sqlparser.NewColName("right"),
    58  	}
    59  
    60  	pred, err := evalengine.Translate(predicate, &dummyTranslator{})
    61  	require.NoError(t, err)
    62  
    63  	tcases := []struct {
    64  		name   string
    65  		res    *sqltypes.Result
    66  		expRes string
    67  	}{{
    68  		name:   "int32",
    69  		res:    sqltypes.MakeTestResult(sqltypes.MakeTestFields("a|b", "int32|int32"), "0|1", "1|0", "2|3"),
    70  		expRes: `[[INT32(1) INT32(0)]]`,
    71  	}, {
    72  		name:   "uint16",
    73  		res:    sqltypes.MakeTestResult(sqltypes.MakeTestFields("a|b", "uint16|uint16"), "0|1", "1|0", "2|3"),
    74  		expRes: `[[UINT16(1) UINT16(0)]]`,
    75  	}, {
    76  		name:   "uint64_int64",
    77  		res:    sqltypes.MakeTestResult(sqltypes.MakeTestFields("a|b", "uint64|int64"), "0|1", "1|0", "2|3"),
    78  		expRes: `[[UINT64(1) INT64(0)]]`,
    79  	}, {
    80  		name:   "int32_uint32",
    81  		res:    sqltypes.MakeTestResult(sqltypes.MakeTestFields("a|b", "int32|uint32"), "0|1", "1|0", "2|3"),
    82  		expRes: `[[INT32(1) UINT32(0)]]`,
    83  	}, {
    84  		name:   "uint16_int8",
    85  		res:    sqltypes.MakeTestResult(sqltypes.MakeTestFields("a|b", "uint16|int8"), "0|1", "1|0", "2|3"),
    86  		expRes: `[[UINT16(1) INT8(0)]]`,
    87  	}, {
    88  		name:   "uint64_int32",
    89  		res:    sqltypes.MakeTestResult(sqltypes.MakeTestFields("a|b", "uint64|int32"), "0|1", "1|0", "2|3"),
    90  		expRes: `[[UINT64(1) INT32(0)]]`,
    91  	}}
    92  	for _, tc := range tcases {
    93  		t.Run(tc.name, func(t *testing.T) {
    94  			filter := &Filter{
    95  				Predicate: pred,
    96  				Input:     &fakePrimitive{results: []*sqltypes.Result{tc.res}},
    97  			}
    98  			qr, err := filter.TryExecute(context.Background(), &noopVCursor{}, nil, false)
    99  			require.NoError(t, err)
   100  			require.Equal(t, tc.expRes, fmt.Sprintf("%v", qr.Rows))
   101  		})
   102  	}
   103  }