getting values from dictionary with clickhouse database - dictionary

Question

I am learning Clickhouse databse and I have a challenge with some lab:
I have a dictionary with the following structure / schema:
CREATE DICTIONARY reputation_rbl_db (　 network String,　 source String,　 category String　,asn UInt32,country String　)　PRIMARY KEY network　SOURCE(FILE(　 path '/var/lib/clickhouse/user_files/rbl_database.csv'　 format 'CSVWithNames'　))　LAYOUT(IP_TRIE())　LIFETIME(300);
I have a lot of rows like:
┌─network────────┬─source────┬─category────┬───asn─┬─country─┐
│ 1.1.109.250/32 │ blacklist │ rbl │ 2519 │ JP │
│ 1.10.16.0/20 │ blacklist │ rb │ 22 │ CN │
│ 1.12.45.0/24 │ blacklist │ rbl │ 45090 │ CN │
└────────────────┴───────────┴─────────────┴───────┴─────────┘
I need to find the SELECT which search if the IP 1.10.15.55 is under some network with CIDR at the dictionary, something to
SELECT * from reputation_rbl_db where network= '1.10.15.55/32'
and the response needs to be something like:
1.10.16.0/20, blacklist, rbl, 22, CN
is there any way to find this select ?
Thanks in advance
Max
i tried with:
SELECT * FROM dictionary('reputation_rbl_db') where network = '1.10.15.55/32' but do not work because the select not find the network which has this IP

Answer 1

IP Address 1.10.15.55 is NOT in CIDR range 1.10.16.0/20 ;).
Anyway,
There is a IPv4CIDRToRange function in Clickhouse:
SELECT IPv4CIDRToRange(toIPv4('1.10.16.0'), 20)
Query id: 598aa84f-6297-4d99-8b0c-29a571370024
┌─IPv4CIDRToRange(toIPv4('1.10.16.0'), 20)─┐
│ ('1.10.16.0','1.10.31.255') │
└──────────────────────────────────────────┘
You can also use Clickhouse bit functions (or bit operators in other DBMSs):
SELECT
CAST(CAST('255.255.240.0', 'IPv4'), 'UInt32') AS mask,
CAST(bitAnd(CAST(CAST('1.10.16.0', 'IPv4'), 'UInt32'), mask), 'IPv4') AS lower,
CAST(bitOr(lower, bitNot(CAST(mask, 'UInt32'))), 'IPv4') AS upper
┌───────mask─┬─lower─────┬─upper───────┐
│ 4294963200 │ 1.10.16.0 │ 1.10.31.255 │
└────────────┴───────────┴─────────────┘
Or you can just utilize isIPAddressInRange function (easy way):
SELECT isIPAddressInRange('1.10.15.55', '1.10.16.0/20')
┌─isIPAddressInRange('1.10.15.55', '1.10.16.0/20')─┐
│ 0 │
└──────────────────────────────────────────────────┘
Example:
SELECT * FROM reputation_rbl_db
WHERE isIPAddressInRange(extract('1.10.15.55/32', '[^/]*'), network)