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59d66bb1d5
ClickHouse/dbms/programs/copier
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Nicolae Vartolomei 59d66bb1d5 clickhouse-copier: Allow empty database name 
This is needed to make clickhouse-copier work with cross-replication
setups (also known as [circular replication][1]).

When database name is not specified we rely on `<default_database>`
element from replica stanza.

Example:

```xml
<source_cluster>
    <shard>
        <replica>
            <host>localhost</host>
            <port>9000</port>
            <default_database>r0</default_database>
        </replica>
        <replica>
            <host>localhost</host>
            <port>666</port>
            <default_database>r1</default_database>
        </replica>
    </shard>
    <shard>
        <replica>
            <host>localhost</host>
            <port>666</port>
            <default_database>r0</default_database>
        </replica>
        <replica>
            <host>localhost</host>
            <port>9000</port>
            <default_database>r1</default_database>
        </replica>
    </shard>
</source_cluster>
```

[1]: https://www.altinity.com/blog/2018/5/10/circular-replication-cluster-topology-in-clickhouse
2019-06-25 22:09:11 +00:00
..
clickhouse-copier.cpp Squashed #2471 2018-06-05 23:09:51 +03:00
ClusterCopier.cpp clickhouse-copier: Allow empty database name 2019-06-25 22:09:11 +00:00
ClusterCopier.h Squashed #2471 2018-06-05 23:09:51 +03:00
CMakeLists.txt CLICKHOUSE-4519 Support dictionaries in clickhouse-copier (#5270) 2019-05-15 12:16:09 +03:00