statistics is collected. The statistics iscardinality quality, planning and

isnot stored.

this query. The statistics isnot collected for unknown queries.

The statisticsiscardinality quality, planning and execution time.

One can see the collected statistics in table aqo_query_stat.

use_aqo=DatumGetBool(query_params[2]);

fspace_hash=DatumGetInt32(query_params[3]);

auto_tuning=DatumGetBool(query_params[4]);

collect_stat=learn_aqo||use_aqo||auto_tuning;

if (!collect_stat)

collect_stat=auto_tuning;

if (!learn_aqo&& !use_aqo&& !auto_tuning)

add_deactivated_query(query_hash);

}

explain_aqo=use_aqo;