public void test_alter_constraint() throws Exception {
String sql = "alter table TUSER drop constraint UK_084c17821a8f47e8b31fbb126b6";
OracleStatementParser parser = new OracleStatementParser(sql);
SQLStatement stmt = parser.parseStatementList().get(0);
parser.match(Token.EOF);
OracleSchemaStatVisitor visitor = new OracleSchemaStatVisitor();
stmt.accept(visitor);
System.out.println("Tables : " + visitor.getTables());