JSONString每行进度

描述

与 JSONEachRow/JSONStringsEachRow 不同的是，ClickHouse 还将以 JSON 值的形式提供进度信息。

示例用法

{"row":{"num":42,"str":"hello","arr":[0,1]}}
{"row":{"num":43,"str":"hello","arr":[0,1,2]}}
{"row":{"num":44,"str":"hello","arr":[0,1,2,3]}}
{"progress":{"read_rows":"3","read_bytes":"24","written_rows":"0","written_bytes":"0","total_rows_to_read":"3"}}

格式设置