Sergey Chernov

[client-v2][discussion] Load-balancing on the client side.

4

### Topic Client-v2 implementation may connect to a single target host today. Client uses Apache HTTP client which has built-in connection pool. This set of properties is enough to handle...

[client-v2] Incorrect read of server error when server response is compressed

2

When compression is on (default case) and error happens - it is read from a raw stream, but should be wrapped with LZ4 Input Stream. ### Steps to reproduce 1....

[client-v2] Make compression dependencies as required

1

## Summary Client uses compression by default, but related library dependencies are optional. It causes confusion because users have to add extra dependencies while library cannot work without it without...

## Summary There is a [feature](https://clickhouse.com/docs/en/interfaces/http#setting-role-with-query-parameters) and it should be supported by the new client. It allows to set roles for every operation where session may not be maintained (http...

[client-v2] Added setting log_comment

1

## Summary There is an option to set a comment that will be seen in `system.query_log` record associated with a query. It is useful for troubleshooting. In case of HTTP...

### Describe the bug It should be possible to get number values in different convertible types. Today it is required for application to know datatype of a column. For example,...

### Description Client V1 supports remembering roles for sending with requests: https://clickhouse.com/docs/en/interfaces/http#setting-role-with-query-parameters https://github.com/ClickHouse/clickhouse-java/issues/1782 will implement sending custom query parameters that should solve "problem" for the feature. **Expected Behavior** - User...

### Describe the bug Next scenarios should be covered: - Connection timeout: expecting what value was used for the timeout - Socket timeout exception should be handled properly ?

### Describe the bug There are some confusing dependencies. For example, `clickhouse-jdbc` (https://mvnrepository.com/artifact/com.clickhouse/clickhouse-jdbc) has: - `com.clickhouse » org.apache.commons.compress` 1.9.2 - `com.clickhouse » io.grpc` 1.9.2 - `com.clickhouse » org.roaringbitmap` 1.9.2 What...

### Description There is a documentation page about how to configure NiFi to work with the JDBC client: https://clickhouse.com/docs/en/integrations/nifi It is outdated: - very old version is mentioned - when...