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Percona-Lab / clickhousedb_fdw

PostgreSQL's Foreign Data Wrapper For ClickHouse
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If the result of the query exceeds a certain value, the process is aborted. #19

Open meiyifei opened 5 years ago

meiyifei commented 5 years ago

It depends on this value:max_result_bytes=14000000;

sprintf(url, "Driver={%s};url=http://%s:%s@%s:%d/query?database=%s&max_result_bytes=14000000&buffer_size=3000000;",driver,user,pass,host,port,dbname);

We need to modify clickhouse-client.cpp and then recompile clickhouse_fdw.

ibrarahmad commented 5 years ago

It is, better to add a new GUC for max_result_bytes.

On Wed, Jul 3, 2019 at 4:35 PM meiyifei notifications@github.com wrote:

It depends on this value:max_result_bytes=14000000;

sprintf(url, "Driver={%s};url=http://%s:%s@ %s:%d/query?database=%s&max_result_bytes=14000000&buffer_size=3000000;",driver,user,pass,host,port,dbname);

We need to modify clickhouse-client.cpp and then recompile clickhouse_fdw.

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eclbg commented 5 years ago

I have started using the FDW and I am seeing unexpected results from queries which I suspect are due to the parameter max_result_bytes. Is this parameter set in clickhouse? Or is it a postgres parameter? Thanks!