@Override
    public boolean tableExists(String dbName, String tblName) {
        ConnectorMetadata metadata = metadataOfDb(dbName);
        return metadata.tableExists(dbName, tblName);
    }
@Test
    void testTableExists() {
        MockedJDBCMetadata mockedJDBCMetadata = new MockedJDBCMetadata(new HashMap<>());
        assertTrue(mockedJDBCMetadata.tableExists("db1", "tbl1"));
    }