Merge pull request #177 from cemezgin/driver-export

Export driver

Author: DoubleDi

README.md

@@ -266,6 +266,36 @@ func main() {
 		)
 	}
 }
+```
+Use with [DataDog trace](https://pkg.go.dev/gopkg.in/DataDog/dd-trace-go.v1/contrib/database/sql)
+```go
+package main
+
+import (
+	"log"
+
+	sqltrace "gopkg.in/DataDog/dd-trace-go.v1/contrib/database/sql"
+
+	clickhouse "github.com/mailru/go-clickhouse/v2"
+)
+
+func main() {
+	// The first step is to register the clickhouse driver.
+	sqltrace.Register("chhttp", &clickhouse.Driver{})
+
+	// Followed by a call to Open.
+    db, err := sqltrace.Open("chhttp", "http://127.0.0.1:8123/default")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	rows, err := db.Query("SELECT name FROM users WHERE age=?", 27)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+}
+
 ```
 
 ## Go versions

clickhouse.go

@@ -6,15 +6,15 @@ import (
 )
 
 func init() {
-	sql.Register("chhttp", new(chDriver))
+	sql.Register("chhttp", new(Driver))
 }
 
-// chDriver implements sql.Driver interface
-type chDriver struct {
+// Driver implements sql.Driver interface
+type Driver struct {
 }
 
 // Open returns new db connection
-func (d *chDriver) Open(dsn string) (driver.Conn, error) {
+func (d *Driver) Open(dsn string) (driver.Conn, error) {
 	cfg, err := ParseDSN(dsn)
 	if err != nil {
 		return nil, err

clickhouse_test.go

@@ -12,7 +12,7 @@ import (
 )
 
 var (
-	_ driver.Driver = new(chDriver)
+	_ driver.Driver = new(Driver)
 )
 
 var ddls = []string{