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https://github.com/ClickHouse/ClickHouse.git
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Remove function
This commit is contained in:
Alexey Milovidov
parent
d86e59eb08
commit
78523639e0
@ -501,41 +501,3 @@ Result:
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│ 0 │
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└────────────────────────────────────────────────────────────────────┘
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```
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## reverseDNSQuery
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Performs a reverse DNS query to get the PTR records associated with the IP address.
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**Syntax**
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``` sql
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reverseDNSQuery(address)
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```
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This function performs reverse DNS resolutions on both IPv4 and IPv6.
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**Arguments**
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- `address` — An IPv4 or IPv6 address. [String](../../sql-reference/data-types/string.md).
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**Returned value**
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- Associated domains (PTR records).
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Type: Type: [Array(String)](../../sql-reference/data-types/array.md).
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**Example**
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Query:
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``` sql
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SELECT reverseDNSQuery('192.168.0.2');
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```
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Result:
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``` text
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┌─reverseDNSQuery('192.168.0.2')────────────┐
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│ ['test2.example.com','test3.example.com'] │
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└───────────────────────────────────────────┘
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```
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@ -1,118 +0,0 @@
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnArray.h>
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#include <Functions/FunctionFactory.h>
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#include <Functions/IFunction.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypeArray.h>
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#include <Common/DNSResolver.h>
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#include <Poco/Net/IPAddress.h>
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#include <Interpreters/Context.h>
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#include <Poco/Util/AbstractConfiguration.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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extern const int BAD_ARGUMENTS;
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extern const int FUNCTION_NOT_ALLOWED;
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}
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class ReverseDNSQuery : public IFunction
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{
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public:
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static constexpr auto name = "reverseDNSQuery";
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static constexpr auto allow_function_config_name = "allow_reverse_dns_query_function";
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static FunctionPtr create(ContextPtr)
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{
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return std::make_shared<ReverseDNSQuery>();
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}
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String getName() const override
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{
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return name;
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & data_type, size_t input_rows_count) const override
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{
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if (!Context::getGlobalContextInstance()->getConfigRef().getBool(allow_function_config_name, false))
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{
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throw Exception(ErrorCodes::FUNCTION_NOT_ALLOWED, "Function {} is not allowed because {} is not set", name, allow_function_config_name);
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}
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if (arguments.empty())
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{
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throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Function {} requires at least one argument", name);
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}
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auto res_type = getReturnTypeImpl({data_type});
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if (input_rows_count == 0u)
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{
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return res_type->createColumnConstWithDefaultValue(input_rows_count);
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}
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if (!isString(arguments[0].type))
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{
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Function {} requires the input column to be of type String", name);
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}
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auto input_column = arguments[0].column;
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auto ip_address = Poco::Net::IPAddress(input_column->getDataAt(0).toString());
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auto ptr_records = DNSResolver::instance().reverseResolve(ip_address);
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if (ptr_records.empty())
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return res_type->createColumnConstWithDefaultValue(input_rows_count);
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Array res;
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for (const auto & ptr_record : ptr_records)
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{
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res.push_back(ptr_record);
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}
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return res_type->createColumnConst(input_rows_count, res);
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}
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override
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{
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return false;
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}
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size_t getNumberOfArguments() const override
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{
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return 1u;
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}
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DataTypePtr getReturnTypeImpl(const DataTypes & /*arguments*/) const override
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{
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return std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>());
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}
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};
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REGISTER_FUNCTION(ReverseDNSQuery)
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{
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factory.registerFunction<ReverseDNSQuery>(
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FunctionDocumentation{
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.description = R"(Performs a reverse DNS query to get the PTR records associated with the IP address)",
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.syntax = "reverseDNSQuery(address)",
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.arguments = {{"address", "An IPv4 or IPv6 address. [String](../../sql-reference/data-types/string.md)"}},
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.returned_value = "Associated domains (PTR records). [String](../../sql-reference/data-types/string.md).",
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.examples = {{"",
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"SELECT reverseDNSQuery('192.168.0.2');",
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R"(
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┌─reverseDNSQuery('192.168.0.2')────────────┐
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│ ['test2.example.com','test3.example.com'] │
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└───────────────────────────────────────────┘
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)"}}
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}
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);
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}
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}
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@ -1,3 +0,0 @@
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<clickhouse>
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<allow_reverse_dns_query_function>1</allow_reverse_dns_query_function>
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</clickhouse>
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@ -1,3 +0,0 @@
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<clickhouse>
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<disable_internal_dns_cache>1</disable_internal_dns_cache>
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</clickhouse>
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@ -1,5 +0,0 @@
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<clickhouse>
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<listen_host>::</listen_host>
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<listen_host>0.0.0.0</listen_host>
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<listen_try>1</listen_try>
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</clickhouse>
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@ -1,3 +0,0 @@
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<clickhouse>
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<allow_reverse_dns_query_function>1</allow_reverse_dns_query_function>
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</clickhouse>
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@ -1,8 +0,0 @@
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. {
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hosts /example.com {
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reload "20ms"
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fallthrough
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}
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forward . 127.0.0.11
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log
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}
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@ -1 +0,0 @@
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filled in runtime, but needs to exist in order to be volume mapped in docker
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@ -1,74 +0,0 @@
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import pytest
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import socket
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from helpers.cluster import ClickHouseCluster, get_docker_compose_path, run_and_check
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from time import sleep
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import os
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DOCKER_COMPOSE_PATH = get_docker_compose_path()
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SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
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cluster = ClickHouseCluster(__file__)
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ch_server = cluster.add_instance(
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"clickhouse-server",
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with_coredns=True,
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main_configs=[
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"configs/config.xml",
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"configs/reverse_dns_function.xml",
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"configs/listen_host.xml",
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],
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)
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@pytest.fixture(scope="module")
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def started_cluster():
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global cluster
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try:
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cluster.start()
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yield cluster
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finally:
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cluster.shutdown()
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def check_ptr_record(ip, hostname):
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try:
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host, aliaslist, ipaddrlist = socket.gethostbyaddr(ip)
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if hostname.lower() == host.lower():
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return True
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except socket.herror:
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pass
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return False
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def setup_dns_server(ip):
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domains_string = "test.example.com"
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example_file_path = f'{ch_server.env_variables["COREDNS_CONFIG_DIR"]}/example.com'
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run_and_check(f"echo '{ip} {domains_string}' > {example_file_path}", shell=True)
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# DNS server takes time to reload the configuration.
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for try_num in range(10):
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if all(check_ptr_record(ip, host) for host in domains_string.split()):
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break
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sleep(1)
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def setup_ch_server(dns_server_ip):
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ch_server.exec_in_container(
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(["bash", "-c", f"echo 'nameserver {dns_server_ip}' > /etc/resolv.conf"])
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)
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ch_server.exec_in_container(
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(["bash", "-c", "echo 'options ndots:0' >> /etc/resolv.conf"])
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)
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ch_server.query("SYSTEM DROP DNS CACHE")
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def test_reverse_dns_query(started_cluster):
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dns_server_ip = cluster.get_instance_ip(cluster.coredns_host)
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random_ipv6 = "4ae8:fa0f:ee1d:68c5:0b76:1b79:7ae6:1549" # https://commentpicker.com/ip-address-generator.php
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setup_dns_server(random_ipv6)
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setup_ch_server(dns_server_ip)
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for _ in range(0, 200):
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response = ch_server.query(f"select reverseDNSQuery('{random_ipv6}')")
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assert response == "['test.example.com']\n"
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@ -1,14 +0,0 @@
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-- { echoOn }
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-- Expect dns.google on both queries
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select reverseDNSQuery('8.8.8.8');
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['dns.google']
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select reverseDNSQuery('2001:4860:4860::8888');
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['dns.google']
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-- Expect empty response
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select reverseDNSQuery('');
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[]
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-- Expect error, invalid column type
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select reverseDNSQuery(1); -- {serverError 36}
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-- Expect error, wrong number of arguments
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select reverseDNSQuery(); -- {serverError 42}
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select reverseDNSQuery(1, 2); -- {serverError 42}
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@ -1,14 +0,0 @@
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-- { echoOn }
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-- Expect dns.google on both queries
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select reverseDNSQuery('8.8.8.8');
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select reverseDNSQuery('2001:4860:4860::8888');
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-- Expect empty response
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select reverseDNSQuery('');
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-- Expect error, invalid column type
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select reverseDNSQuery(1); -- {serverError 36}
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-- Expect error, wrong number of arguments
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select reverseDNSQuery(); -- {serverError 42}
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select reverseDNSQuery(1, 2); -- {serverError 42}
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@ -2198,8 +2198,6 @@ retentions
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rethrow
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retransmit
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retriable
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retuned
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reverseDNSQuery
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reverseUTF
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rightPad
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rightPadUTF
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