ClickHouse / ClickHouse/clickhouse-java
Example of migration from ClickHouseRowBinaryStream
- 主要言語
- Java
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- 1.6k
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- 636
- 平均マージ
- 2日 23時間
- マージ済み PR(30日)
- 29
説明
### Use case
For users, migrating from old client
### Describe the solution you'd like
...
### Describe the alternatives you've considered
...
### Additional context
I have code, that insert `(UUID, UUID, UUID, byte[])` objects with `clickhouse-jdbc:0.3.1-patch`:
```java
@Override
protected ProcessorResult send(List events) throws BackendServiceFailedException {
var sentEvents = new LinkedList();
try (ClickHouseStatement statement = this.connection.createStatement()) {
statement.write().send(
"INSERT INTO tracing_spans_local (trace_id, parent_span_id, span_id, payload)",
stream -> {
for (var event : events) {
write(stream, sinkEvent.getInternalEvent())
}
},
ClickHouseFormat.RowBinary);
@Override
protected boolean write(ClickHouseRowBinaryStream stream, Event event) throws IOException {
// ...
stream.writeUUID(traceId.get());
stream.writeUUID(parentSpanId.orElse(DEFAULT_UUID));
stream.writeUUID(spanId.get());
stream.writeUnsignedLeb128(event.getBytes().length);
stream.writeBytes(event.getBytes());
```
Now I'm trying to updage to `client-v2:0.8.2` and have no idea how to rewrite this. Tried to use `RowBinaryFormatWriter`, but it looks very complex and have no docs. Probably, it's not for client use?
コントリビューションガイド
調査の方向性
Start by comparing the old ClickHouseRowBinaryStream usage with the client-v2 RowBinaryFormatWriter entry point and the JDBC client API mentioned in the issue. Document the equivalent migration for UUIDs, the length-prefixed payload, and byte data, with a complete example showing how the insert is sent.
索引モデルが issue の本文から書いたものです。
評価
- 技術スタック
- clickhouse, java
- 領域
- api, documentation
- issue の種類
- ドキュメント
- 難易度
- 4/5
- 見積もり時間
- 3〜5日
- 活発さ
- 静か
- 明瞭さ
- 説明が足りない
- 初心者へのやさしさ
- 45/100