add tzname optional parameter

README.rst

@@ -74,7 +74,8 @@ param1, param2... are
 .. csv-table::
    :header: Name,Description,Default,Note
 
-   role,Role name,
    auth_plugin_name,Authentication plugin name.,Srp,Srp256/Srp/Legacy_Auth are available.
-   wire_crypt,Enable wire data encryption or not.,true,For Firebird 3.0+
    column_name_to_lower,Force column name to lower,false,For "github.com/jmoiron/sqlx"
+   role,Role name,
+   tzname, Time Zone name, For Firebird 4.0+
+   wire_crypt,Enable wire data encryption or not.,true,For Firebird 3.0+

connection.go

@@ -30,18 +30,18 @@ import (
 )
 
 type firebirdsqlConn struct {
-	wp                   *wireProtocol
-	tx                   *firebirdsqlTx
-	addr                 string
-	dbName               string
-	user                 string
-	password             string
-	column_name_to_lower bool
-	isAutocommit         bool
-	clientPublic         *big.Int
-	clientSecret         *big.Int
-	transHandles         []int32
-	timeZoneIds          map[int]string
+	wp                *wireProtocol
+	tx                *firebirdsqlTx
+	addr              string
+	dbName            string
+	user              string
+	password          string
+	columnNameToLower bool
+	isAutocommit      bool
+	clientPublic      *big.Int
+	clientSecret      *big.Int
+	transHandles      []int32
+	timeZoneIds       map[int]string
 }
 
 func (fc *firebirdsqlConn) begin(isolationLevel int) (driver.Tx, error) {
@@ -777,7 +777,7 @@ func newFirebirdsqlConn(dsn string) (fc *firebirdsqlConn, err error) {
 	fc.dbName = dbName
 	fc.user = user
 	fc.password = password
-	fc.column_name_to_lower = column_name_to_lower
+	fc.columnNameToLower = column_name_to_lower
 	fc.isAutocommit = true
 	fc.tx, err = newFirebirdsqlTx(fc, ISOLATION_LEVEL_READ_COMMITED, fc.isAutocommit)
 	fc.clientPublic = clientPublic
@@ -817,7 +817,7 @@ func createFirebirdsqlConn(dsn string) (fc *firebirdsqlConn, err error) {
 	fc.dbName = dbName
 	fc.user = user
 	fc.password = password
-	fc.column_name_to_lower = column_name_to_lower
+	fc.columnNameToLower = column_name_to_lower
 	fc.isAutocommit = true
 	fc.tx, err = newFirebirdsqlTx(fc, ISOLATION_LEVEL_READ_COMMITED, fc.isAutocommit)
 	fc.clientPublic = clientPublic

rows.go

@@ -53,7 +53,7 @@ func (rows *firebirdsqlRows) Columns() []string {
 	columns := make([]string, len(rows.stmt.xsqlda))
 	for i, x := range rows.stmt.xsqlda {
 		columns[i] = x.aliasname
-		if rows.stmt.tx.fc.column_name_to_lower {
+		if rows.stmt.tx.fc.columnNameToLower {
 			columns[i] = strings.ToLower(columns[i])
 		}
 	}

utils.go

@@ -241,10 +241,11 @@ func parseDSN(dsn string) (addr string, dbName string, user string, passwd strin
 	m, _ := url.ParseQuery(u.RawQuery)
 
 	var default_options = map[string]string{
-		"role":                 "",
 		"auth_plugin_name":     "Srp",
-		"wire_crypt":           "true",
 		"column_name_to_lower": "false",
+		"role":                 "",
+		"tzname":               "",
+		"wire_crypt":           "true",
 	}
 
 	for k, v := range default_options {