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hex(ipv6_string_to_num_or_default('1111::ffff'));\n+--------------------------------------------------+\n| hex(ipv6_string_to_num_or_default('1111::ffff')) |\n+--------------------------------------------------+\n| 1111000000000000000000000000FFFF |\n+--------------------------------------------------+\n1 row in set (0.01 sec)\n\nmysql> select hex(ipv6_string_to_num_or_default('192.168.0.1'));\n+---------------------------------------------------+\n| hex(ipv6_string_to_num_or_default('192.168.0.1')) |\n+---------------------------------------------------+\n| 00000000000000000000FFFFC0A80001 |\n+---------------------------------------------------+\n1 row in set (0.02 sec)\n\nmysql> select hex(ipv6_string_to_num_or_default('notaaddress'));\n+---------------------------------------------------+\n| hex(ipv6_string_to_num_or_default('notaaddress')) |\n+---------------------------------------------------+\n| 00000000000000000000000000000000 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