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23 lines
609 B
SQL
23 lines
609 B
SQL
-- https://clickhouse.com/blog/geolocating-ips-in-clickhouse-and-grafana#using-bit-functions-to-convert-ip-ranges-to-cidr-notation
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CREATE FUNCTION unmatchedBits AS (ip_s, ip_e) -> if(
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bitXor(ip_s, ip_e) != 0,
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ceil(log2(bitXor(ip_s, ip_e))), 0
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);
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CREATE FUNCTION cidrSuffix AS (ip_s, ip_e) -> 32 - unmatchedBits(ip_s, ip_e);
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CREATE FUNCTION cidrAddress AS (ip_s, ip_e) -> toIPv4(
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bitAnd(
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bitNot(pow(2, unmatchedBits(ip_s, ip_e)) - 1),
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ip_s
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)::UInt64
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);
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CREATE FUNCTION IPv4RangeToCIDRString AS (ip_s, ip_e) -> CONCAT(
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toString(cidrAddress(ip_s, ip_e)),
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'/',
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toString(cidrSuffix(ip_s, ip_e))
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);
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