github.com/dolthub/go-mysql-server@v0.18.0/sql/rowexec/update_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 rowexec
    16  
    17  import (
    18  	"testing"
    19  	"time"
    20  
    21  	"github.com/dolthub/vitess/go/sqltypes"
    22  	"github.com/stretchr/testify/require"
    23  
    24  	"github.com/dolthub/go-mysql-server/memory"
    25  	"github.com/dolthub/go-mysql-server/sql"
    26  	"github.com/dolthub/go-mysql-server/sql/expression"
    27  	"github.com/dolthub/go-mysql-server/sql/plan"
    28  	"github.com/dolthub/go-mysql-server/sql/types"
    29  )
    30  
    31  func TestUpdateIgnoreConversions(t *testing.T) {
    32  	testCases := []struct {
    33  		name      string
    34  		colType   sql.Type
    35  		value     interface{}
    36  		valueType sql.Type
    37  		expected  interface{}
    38  	}{
    39  		{
    40  			name:      "inserting a string into a integer defaults to a 0",
    41  			colType:   types.Int64,
    42  			value:     "dadasd",
    43  			valueType: types.Text,
    44  			expected:  int64(0),
    45  		},
    46  		{
    47  			name:      "string too long gets truncated",
    48  			colType:   types.MustCreateStringWithDefaults(sqltypes.VarChar, 2),
    49  			value:     "dadsa",
    50  			valueType: types.Text,
    51  			expected:  "da",
    52  		},
    53  		{
    54  			name:      "inserting a string into a datetime results in 0 time",
    55  			colType:   types.Datetime,
    56  			value:     "dadasd",
    57  			valueType: types.Text,
    58  			expected:  time.Unix(-62167219200, 0).UTC(),
    59  		},
    60  		{
    61  			name:      "inserting a negative into an unsigned int results in 0",
    62  			colType:   types.Uint64,
    63  			value:     int64(-1),
    64  			expected:  uint64(1<<64 - 1),
    65  			valueType: types.Uint64,
    66  		},
    67  	}
    68  
    69  	for _, tc := range testCases {
    70  		t.Run(tc.name, func(t *testing.T) {
    71  			db := memory.NewDatabase("foo")
    72  			pro := memory.NewDBProvider(db)
    73  			ctx := newContext(pro)
    74  
    75  			sch := sql.NewPrimaryKeySchema(sql.Schema{
    76  				{Name: "c1", Source: "foo", Type: tc.colType, Nullable: true},
    77  			})
    78  			table := memory.NewTable(db, "foo", sch, nil)
    79  
    80  			err := table.Insert(ctx, sql.Row{nil})
    81  			require.NoError(t, err)
    82  
    83  			// Run the UPDATE IGNORE
    84  			sf := expression.NewSetField(expression.NewGetField(0, tc.colType, "c1", true), expression.NewLiteral(tc.value, tc.valueType))
    85  			updatePlan := plan.NewUpdate(plan.NewResolvedTable(table, nil, nil), true, []sql.Expression{sf})
    86  
    87  			ri, err := DefaultBuilder.Build(ctx, updatePlan, nil)
    88  			require.NoError(t, err)
    89  
    90  			_, err = sql.RowIterToRows(ctx, ri)
    91  			require.NoError(t, err)
    92  
    93  			// Run a SELECT to see the updated data
    94  			selectPlan := plan.NewProject([]sql.Expression{
    95  				expression.NewGetField(0, tc.colType, "c1", true),
    96  			}, plan.NewResolvedTable(table, nil, nil))
    97  
    98  			ri, err = DefaultBuilder.Build(ctx, selectPlan, nil)
    99  			require.NoError(t, err)
   100  
   101  			rows, err := sql.RowIterToRows(ctx, ri)
   102  			require.NoError(t, err)
   103  
   104  			require.Equal(t, 1, len(rows))
   105  			require.Equal(t, tc.expected, rows[0][0])
   106  		})
   107  	}
   108  }