0. Poco::Exception::Exception(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int) @ 0x10542450 in /usr/bin/clickhouse
1. DB::Exception::Exception(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int) @ 0x8f4272d in /usr/bin/clickhouse
2. PoolWithFailoverBase<DB::IConnectionPool>::getMany(unsigned long, unsigned long, unsigned long, std::__1::function<PoolWithFailoverBase<DB::IConnectionPool>::TryResult (DB::IConnectionPool&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&)> const&, std::__1::function<unsigned long (unsigned long)> const&, bool) @ 0xdb4813e in /usr/bin/clickhouse
3. PoolWithFailoverBase<DB::IConnectionPool>::get(std::__1::function<PoolWithFailoverBase<DB::IConnectionPool>::TryResult (DB::IConnectionPool&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&)> const&, std::__1::function<unsigned long (unsigned long)> const&) @ 0xdb48541 in /usr/bin/clickhouse
4. DB::ConnectionPoolWithFailover::get(DB::ConnectionTimeouts const&, DB::Settings const*, bool) @ 0xdb413e5 in /usr/bin/clickhouse
5. DB::ClusterCopier::getCreateTableForPullShard(DB::ConnectionTimeouts const&, DB::TaskShard&) @ 0x91097d8 in /usr/bin/clickhouse
6. DB::ClusterCopier::createShardInternalTables(DB::ConnectionTimeouts const&, DB::TaskShard&, bool) @ 0x910c7e8 in /usr/bin/clickhouse
7. DB::ClusterCopier::getShardPartitions(DB::ConnectionTimeouts const&, DB::TaskShard&) @ 0x9114cd2 in /usr/bin/clickhouse
8. DB::ClusterCopier::discoverShardPartitions(DB::ConnectionTimeouts const&, std::__1::shared_ptr<DB::TaskShard> const&) @ 0x91169e2 in /usr/bin/clickhouse
9. ThreadPoolImpl<ThreadFromGlobalPool>::worker(std::__1::__list_iterator<ThreadFromGlobalPool, void*>) @ 0x8f6792b in /usr/bin/clickhouse
10. ThreadFromGlobalPool::ThreadFromGlobalPool<void ThreadPoolImpl<ThreadFromGlobalPool>::scheduleImpl<void>(std::__1::function<void ()>, int, std::__1::optional<unsigned long>)::'lambda1'()>(void&&, void ThreadPoolImpl<ThreadFromGlobalPool>::scheduleImpl<void>(std::__1::function<void ()>, int, std::__1::optional<unsigned long>)::'lambda1'()&&...)::'lambda'()::operator()() const @ 0x8f68608 in /usr/bin/clickhouse
11. ThreadPoolImpl<std::__1::thread>::worker(std::__1::__list_iterator<std::__1::thread, void*>) @ 0x8f667eb in /usr/bin/clickhouse
12. ? @ 0x8f64c33 in /usr/bin/clickhouse
13. start_thread @ 0x76db in /lib/x86_64-linux-gnu/libpthread-2.27.so
14. __clone @ 0x12188f in /lib/x86_64-linux-gnu/libc-2.27.so
 (version 20.3.8.53 (official build))

<yandex>
  <zookeeper>
    <node>
      <host>127.0.0.1</host>
      <port>2181</port>
    </node>
  </zookeeper>

  <logger>
    <level>trace</level>
    <log>log.log</log>
    <errorlog>log.err.log</errorlog>
    <size>never</size>
  </logger>

  <openSSL>
    <client>
      <loadDefaultCAFile>true</loadDefaultCAFile>
      <caConfig>/home/hadoop/clickhouse_migrate/CA.pem</caConfig>
      <cacheSessions>true</cacheSessions>
      <disableProtocols>sslv2,sslv3</disableProtocols>
      <preferServerCiphers>true</preferServerCiphers>
      <invalidCertificateHandler>
        <name>RejectCertificateHandler</name>
      </invalidCertificateHandler>
    </client>
  </openSSL>
</yandex>

<yandex>
    <tcp_port_secure>9440</tcp_port_secure>
    <remote_servers>
        <source_cluster>
            <shard>
                <internal_replication>false</internal_replication>
                    <replica>
                        <host>127.0.0.1</host>
                        <port>8123</port>
                        <user>default</user>
                        <password>12345</password>
                        <secure>1</secure>
                    </replica>
            </shard>
        </source_cluster>

        <destination_cluster>
               <shard>
                <internal_replication>false</internal_replication>
                    <replica>
                        <host>ХОСТ_MANAGED_SERVICE_FOR_CLICKHOUSE.mdb.yandexcloud.net</host>
                        <port>9440</port>
                        <user>USER</user>
                        <password>PASSWORD</password>
                        <secure>1</secure>
                    </replica>
               </shard>
        </destination_cluster>
    </remote_servers>

    <max_workers>2</max_workers>

    <settings_pull>
        <readonly>1</readonly>
    </settings_pull>

    <settings_push>
        <readonly>0</readonly>
    </settings_push>

    <settings>
        <connect_timeout>3</connect_timeout>
        <insert_distributed_sync>1</insert_distributed_sync>
    </settings>

    <tables>
        <table_hits>
            <cluster_pull>source_cluster</cluster_pull>
            <database_pull>test_db</database_pull>
            <table_pull>test</table_pull>

            <cluster_push>destination_cluster</cluster_push>
            <database_push>mv_db</database_push>
            <table_push>test</table_push>

            <engine>
                ENGINE MergeTree() PARTITION BY toYYYYMM(event_date) ORDER BY (event_date, vendor_code, size_code) SETTINGS index_granularity=8192
            </engine>
            <sharding_key>jumpConsistentHash(intHash64(event_date), 2)</sharding_key>
        </table_hits>
    </tables>
</yandex>

select object_id,
       dictGet('currency', 'rate', tuple(currency_id, 'USD', toDate(datetime))) as rate
from some_table
GROUP BY object_id, currency_id, datetime, rate;

Received exception from server (version 20.4.2):
Code: 42. DB::Exception: Received from localhost:9000. DB::Exception: Function dictGet... takes 3 or 4 arguments.

select object_id,
       dictGet('currency', 'rate', tuple(currency_id, 'USD', toDate(datetime))) as rates
from some_table
GROUP BY object_id, currency_id, datetime, rate;

request_time_75                 AggregateFunction(quantileTDigest(0.75), Int32),

CREATE TABLE m
(
    x Int64, 
    request_time_75   AggregateFunction(quantileTDigest(0.75), UInt32)
)
ENGINE = AggregatingMergeTree
order by x

insert into m select 1 x, quantileTDigestState(0.75)(toUInt32(1))

Ok.