Use millisecond as the unit of timeout (#8)

* fix unit

* update go mod name

* fix build

* Revert "fix build"

This reverts commit 16ceeb3.

* Revert "update go mod name"

This reverts commit 20c4266.

* refactor

Author: heqingy

README.md

@@ -31,7 +31,7 @@ The Data Source Name expected is of the following format:
 databricks://:[your token]@[Workspace hostname][Endpoint HTTP Path]
 ```
 
-You can set HTTP Timeout value by appending a `timeout` query parameter and you can set max rows to retrieve by setting the `maxRows` query parameter:
+You can set HTTP Timeout value by appending a `timeout` query parameter (in milliseconds) and you can set max rows to retrieve by setting the `maxRows` query parameter:
 
 ```
 databricks://:[your token]@[Workspace hostname][Endpoint HTTP Path]?timeout=1000&maxRows=1000

connection.go

@@ -3,6 +3,7 @@ package dbsql
 import (
 	"context"
 	"database/sql/driver"
+	"fmt"
 	"log"
 	"time"
 
@@ -91,7 +92,7 @@ func (c *Conn) OpenSession(ctx context.Context) (*hive.Session, error) {
 		session, err := c.client.OpenSession(ctx)
 		if err != nil {
 			c.log.Printf("failed to open session: %v", err)
-			return nil, driver.ErrBadConn
+			return nil, fmt.Errorf("%v: %v", driver.ErrBadConn, err)
 		}
 		c.session = session
 	}

driver.go

@@ -138,9 +138,9 @@ func connect(opts *Options) (*Conn, error) {
 	var err error
 	var transport thrift.TTransport
 	logger := log.New(opts.LogOut, "databricks: ", log.LstdFlags)
-
+	timeout := time.Duration(opts.Timeout * int(time.Millisecond))
 	httpClient := &http.Client{
-		Timeout: time.Duration(opts.Timeout),
+		Timeout: timeout,
 		Transport: &http.Transport{
 			TLSClientConfig: &tls.Config{},
 		},