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driver.go
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driver.go
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package vertigo
// Copyright (c) 2019-2024 Open Text.
//
// 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.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
import (
"database/sql"
"database/sql/driver"
"os"
"strconv"
"github.com/vertica/vertica-sql-go/logger"
)
// Driver as defined by the Go language Driver interface
type Driver struct{}
const (
driverName string = "vertica-sql-go"
driverVersion string = "1.3.3"
protocolVersion uint32 = 0x0003000F // 3.15
)
var driverLogger = logger.New("driver")
// Open takes a connection string in this format:
// user:pass@host:port/database
func (d *Driver) Open(connString string) (driver.Conn, error) {
conn, err := newConnection(connString)
if err != nil {
driverLogger.Error(err.Error())
}
return conn, err
}
// Register ourselves with the sql package.
func init() {
logger.SetLogLevel(logger.WARN)
if logLevel := os.Getenv("VERTICA_SQL_GO_LOG_LEVEL"); logLevel != "" {
logVal, err := strconv.ParseUint(logLevel, 10, 32)
if err != nil {
driverLogger.Error(err.Error())
} else {
logFlag := logger.WARN
switch logVal {
case 0:
logFlag = logger.TRACE
case 1:
logFlag = logger.DEBUG
case 2:
logFlag = logger.INFO
case 3:
logFlag = logger.WARN
case 4:
logFlag = logger.ERROR
case 5:
logFlag = logger.FATAL
case 6:
logFlag = logger.NONE
default:
driverLogger.Error("invalid VERTICA_SQL_GO_LOG_LEVEL value; should be 0-6")
}
logger.SetLogLevel(logFlag)
}
}
if logFile := os.Getenv("VERTICA_SQL_GO_LOG_FILE"); logFile != "" {
if loggerBackend, err := logger.NewFileLogger(logFile); err == nil {
logger.SetLogger(loggerBackend)
} else {
driverLogger.Error("unable to create file logger: %v", err)
}
}
sql.Register("vertica", &Driver{})
}