@Override
    public String getTableAlias() {
        return ast.getTableSource().getAlias();
    }
@Test
    public void testGetTableAlias() {
        String sql = "update t set a = ?, b = ?, c = ?";
        SQLStatement sqlStatement = getSQLStatement(sql);

        SqlServerUpdateRecognizer recognizer = new SqlServerUpdateRecognizer(sql, sqlStatement);
        Assertions.assertNull(recognizer.getTableAlias());

        sql = "update t t1 set a = ?";
        sqlStatement = getSQLStatement(sql);
        recognizer = new SqlServerUpdateRecognizer(sql, sqlStatement);
        Assertions.assertEquals("t1", recognizer.getTableAlias());
    }