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conn.go
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conn.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 gsutil
import (
"database/sql"
"fmt"
"strings"
_ "gitee.com/opengauss/openGauss-connector-go-pq"
"github.com/apache/shardingsphere-on-cloud/pitr/agent/internal/cons"
)
const defaultOGHost = "127.0.0.1"
type OpenGauss struct {
db *sql.DB
user string
pwLen int
dbName string
}
func Open(user, password, dbName string, dbPort uint16) (*OpenGauss, error) {
if strings.Trim(user, " ") == "" {
return nil, fmt.Errorf("user is empty")
}
if strings.Trim(password, " ") == "" {
return nil, fmt.Errorf("password is empty")
}
if strings.Trim(dbName, " ") == "" {
return nil, fmt.Errorf("db name is empty")
}
connStr := "host=%s port=%d user=%s password=%s dbname=%s sslmode=disable"
db, err := sql.Open("opengauss", fmt.Sprintf(connStr, defaultOGHost, dbPort, user, password, dbName))
if err != nil {
efmt := "sql:open fail[user=%s,pwLen=%d,dbName=%s],err=%s,wrap=%w"
return nil, fmt.Errorf(efmt, user, len(password), dbName, err, cons.DBConnectionFailed)
}
return &OpenGauss{
db: db,
user: user,
pwLen: len(password),
dbName: dbName,
}, nil
}
func (og *OpenGauss) Ping() error {
if err := og.db.Ping(); err != nil {
efmt := "db ping fail[user=%s,pwLen=%d,dbName=%s],err=%s,wrap=%w"
return fmt.Errorf(efmt, og.user, og.pwLen, og.dbName, err, cons.DBConnectionFailed)
}
return og.db.Close()
}
func (og *OpenGauss) CheckSchema(s string) error {
_, err := og.db.Exec(s)
if err != nil {
return err
}
return og.db.Close()
}