Sergey Chernov comments

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                                            Sergey Chernov

ClickHouse java client - reusing same instance of ClickHouseClient gives execution timeout after 10 inserts

Good day, The root cause of the problem is that response object is not closed before sending a new request. I've reproduced the problem and here is my fixed version:...

ClickHouse java client - reusing same instance of ClickHouseClient gives execution timeout after 10 inserts

@mshustov It is a application error. We may be can improve it by wrapping future and closing connection on timeout.

ClickHouse java client - reusing same instance of ClickHouseClient gives execution timeout after 10 inserts

relates https://github.com/ClickHouse/clickhouse-java/issues/1619

addBatch method cause Java heap memory char array grows too fast

Hi @wangbing505 - What is the ClickHouse jdbc version do you use? - Is it a requirement to use JDBC?

addBatch method cause Java heap memory char array grows too fast

@wangbing505 1. Yes, please, update to the latest 0.7.0 version. I do not see such code in it and everything should work fine. 2. Yes, you may use java client...

addBatch method cause Java heap memory char array grows too fast

@wangbing505 as the issue solved?

addBatch method cause Java heap memory char array grows too fast

Need to verify how jdbc-v2 handles it.

addBatch method cause Java heap memory char array grows too fast

We might need to stream big SQL requests like we do with text formats. Will prioritize this work.

[V2] Support USE_BINARY_STRING in ClickHouse V2 client

Good day, @krvikash ! Yes, we will support it. From my perspective we need to make it default behavior and convert to `String` on demand. There is an issue https://github.com/ClickHouse/clickhouse-java/issues/2263...

[V2] Support USE_BINARY_STRING in ClickHouse V2 client

Good day, @krvikash ! I appreciate it! Thank you!