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result.go
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result.go
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// Copyright 2020-2021 Dolthub, Inc.
//
// 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 driver
import (
"errors"
"io"
"github.com/Sndav/go-mysql-server/sql"
)
func getOKResult(ctx *sql.Context, rows sql.RowIter) (sql.OkResult, bool, error) {
var okr sql.OkResult
var found bool
for !found {
row, err := rows.Next()
if errors.Is(err, io.EOF) {
break
} else if err != nil {
return okr, found, err
}
if len(row) != 1 {
continue
}
okr, found = row[0].(sql.OkResult)
}
err := rows.Close(ctx)
return okr, found, err
}
// Result is the result of a query execution.
type Result struct {
result sql.OkResult
}
// LastInsertId returns the database's auto-generated ID
// after, for example, an INSERT into a table with primary
// key.
//
// NOT IMPLEMENTED
func (r *Result) LastInsertId() (int64, error) {
return 0, errors.New("sql.Result.LastInsertId is not implemented")
}
// RowsAffected returns the number of rows affected by the
// query.
func (r *Result) RowsAffected() (int64, error) {
return int64(r.result.RowsAffected), nil
}
// ResultNotFound is returned when a row iterator does not return a result.
type ResultNotFound struct{}
// LastInsertId returns an error
func (r *ResultNotFound) LastInsertId() (int64, error) {
return 0, errors.New("no result")
}
// RowsAffected returns an error
func (r *ResultNotFound) RowsAffected() (int64, error) {
return 0, errors.New("no result")
}