Add BindParameterName method.

README

@@ -21,7 +21,7 @@ Conn#Begin/BeginTransaction(type)/Commit/Rollback
 Conn#GetAutocommit
 
 Stmt#ExecUpdate
-Stmt#BindParameterCount/BindParameterIndex
+Stmt#BindParameterCount/BindParameterIndex/BindParameterName
 Stmt#ClearBindings
 Stmt#ColumnCount/ColumnIndex(name)/ColumnName(index)/ColumnType
 

sqlite.go

@@ -406,6 +406,13 @@ func (s *Stmt) BindParameterIndex(name string) int {
 	return int(C.sqlite3_bind_parameter_index(s.stmt, cname))
 }
 
+// The first host parameter has an index of 1, not 0.
+// Calls http://sqlite.org/c3ref/bind_parameter_name.html
+func (s *Stmt) BindParameterName(i int) string {
+	return C.GoString(C.sqlite3_bind_parameter_name(s.stmt, C.int(i)))
+}
+
+
 // Calls sqlite3_bind_parameter_count and sqlite3_bind_(blob|double|int|int64|null|text) depending on args type.
 // http://sqlite.org/c3ref/bind_blob.html
 func (s *Stmt) Bind(args ...interface{}) os.Error {

sqlite_test.go

@@ -168,7 +168,7 @@ func TestInsertWithStatement(t *testing.T) {
 	db := open(t)
 	defer db.Close()
 	createTable(db, t)
-	s, serr := db.Prepare("INSERT INTO test (float_num, int_num, a_string) VALUES (?, ?, ?)")
+	s, serr := db.Prepare("INSERT INTO test (float_num, int_num, a_string) VALUES (:f, :i, :s)")
 	if serr != nil {
 		t.Fatalf("prepare error: %s", serr)
 	}
@@ -181,6 +181,14 @@ func TestInsertWithStatement(t *testing.T) {
 	if paramCount != 3 {
 		t.Errorf("bind parameter count error: %d <> 3", paramCount)
 	}
+	firstParamName := s.BindParameterName(1)
+	if firstParamName != ":f" {
+		t.Errorf("bind parameter name error: %s <> ':f'", firstParamName)
+	}
+	lastParamIndex := s.BindParameterIndex(":s")
+	if lastParamIndex != 3 {
+		t.Errorf("bind parameter name error: %d <> 3", lastParamIndex)
+	}
 
 	db.Begin()
 	for i := 0; i < 1000; i++ {