Adds helpers for pragma 'journal_mode'.

pragma.go

@@ -62,6 +62,30 @@ func (c *Conn) SetRecursiveTriggers(dbName string, on bool) error {
 	return c.exec(pragma(dbName, fmt.Sprintf("recursive_triggers=%t", on)))
 }
 
+// JournalMode queries the current journaling mode for database.
+// Database name is optional (default is 'main').
+// (See http://sqlite.org/pragma.html#pragma_journal_mode)
+func (c *Conn) JournalMode(dbName string) (string, error) {
+	var mode string
+	err := c.OneValue(pragma(dbName, "journal_mode"), &mode)
+	if err != nil {
+		return "", err
+	}
+	return mode, nil
+}
+
+// SetJournalMode changes the journaling mode for database.
+// Database name is optional (default is 'main').
+// (See http://sqlite.org/pragma.html#pragma_journal_mode)
+func (c *Conn) SetJournalMode(dbName, mode string) (string, error) {
+	var newMode string
+	err := c.OneValue(pragma(dbName, Mprintf("journal_mode=%Q", mode)), &newMode)
+	if err != nil {
+		return "", err
+	}
+	return newMode, nil
+}
+
 func pragma(dbName, pragmaName string) string {
 	if len(dbName) == 0 {
 		return "PRAGMA " + pragmaName

pragma_test.go

@@ -29,3 +29,19 @@ func TestSchemaVersion(t *testing.T) {
 	checkNoError(t, err, "Error reading schema version of database: %s")
 	assertEquals(t, "expecting %d but got %d", 0, version)
 }
+
+func TestJournalMode(t *testing.T) {
+	db := open(t)
+	defer db.Close()
+	mode, err := db.JournalMode("")
+	checkNoError(t, err, "Error reading journaling mode of database: %s")
+	assertEquals(t, "expecting %s but got %s", "memory", mode)
+}
+
+func TestSetJournalMode(t *testing.T) {
+	db := open(t)
+	defer db.Close()
+	mode, err := db.SetJournalMode("", "OFF")
+	checkNoError(t, err, "Error setting journaling mode of database: %s")
+	assertEquals(t, "expecting %s but got %s", "off", mode)
+}