drop table if exists test54378; set allow_deprecated_syntax_for_merge_tree=1; create table test54378 (part_date Date, pk_date Date, date Date) Engine=MergeTree(part_date, pk_date, 8192); insert into test54378 values ('2018-04-19', '2018-04-19', '2018-04-19'); select 111 from test54378 where part_date = '2018-04-19'; select 112 from test54378 where part_date in ('2018-04-19'); select 113 from test54378 where pk_date in ('2018-04-19'); select 114 from test54378 where date in ('2018-04-19'); SELECT '-'; select 121 from test54378 where part_date = toDate('2018-04-19'); select 122 from test54378 where part_date in (toDate('2018-04-19')); select 123 from test54378 where pk_date in (toDate('2018-04-19')); select 124 from test54378 where date in (toDate('2018-04-19')); SELECT '-'; select 131 from test54378 where part_date = (SELECT toDate('2018-04-19')); select 132 from test54378 where part_date in (SELECT toDate('2018-04-19')); select 133 from test54378 where pk_date in (SELECT toDate('2018-04-19')); select 134 from test54378 where date in (SELECT toDate('2018-04-19')); SELECT '---'; select 211 from test54378 prewhere part_date = '2018-04-19'; select 212 from test54378 prewhere part_date in ('2018-04-19'); select 213 from test54378 prewhere pk_date in ('2018-04-19'); select 214 from test54378 prewhere date in ('2018-04-19'); SELECT '-'; select 221 from test54378 prewhere part_date = toDate('2018-04-19'); select 222 from test54378 prewhere part_date in (toDate('2018-04-19')); select 223 from test54378 prewhere pk_date in (toDate('2018-04-19')); select 224 from test54378 prewhere date in (toDate('2018-04-19')); SELECT '-'; select 231 from test54378 prewhere part_date = (SELECT toDate('2018-04-19')); select 232 from test54378 prewhere part_date in (SELECT toDate('2018-04-19')); select 233 from test54378 prewhere pk_date in (SELECT toDate('2018-04-19')); select 234 from test54378 prewhere date in (SELECT toDate('2018-04-19')); SELECT '---'; SET optimize_move_to_prewhere = 0; select 311 from test54378 where part_date = '2018-04-19'; select 312 from test54378 where part_date in ('2018-04-19'); select 313 from test54378 where pk_date in ('2018-04-19'); select 314 from test54378 where date in ('2018-04-19'); SELECT '-'; select 321 from test54378 where part_date = toDate('2018-04-19'); select 322 from test54378 where part_date in (toDate('2018-04-19')); select 323 from test54378 where pk_date in (toDate('2018-04-19')); select 324 from test54378 where date in (toDate('2018-04-19')); SELECT '-'; select 331 from test54378 where part_date = (SELECT toDate('2018-04-19')); select 332 from test54378 where part_date in (SELECT toDate('2018-04-19')); select 333 from test54378 where pk_date in (SELECT toDate('2018-04-19')); select 334 from test54378 where date in (SELECT toDate('2018-04-19')); SELECT '---'; SET optimize_move_to_prewhere = 1; select 411 from test54378 where part_date = '2018-04-19'; select 412 from test54378 where part_date in ('2018-04-19'); select 413 from test54378 where pk_date in ('2018-04-19'); select 414 from test54378 where date in ('2018-04-19'); SELECT '-'; select 421 from test54378 where part_date = toDate('2018-04-19'); select 422 from test54378 where part_date in (toDate('2018-04-19')); select 423 from test54378 where pk_date in (toDate('2018-04-19')); select 424 from test54378 where date in (toDate('2018-04-19')); SELECT '-'; select 431 from test54378 where part_date = (SELECT toDate('2018-04-19')); select 432 from test54378 where part_date in (SELECT toDate('2018-04-19')); select 433 from test54378 where pk_date in (SELECT toDate('2018-04-19')); select 434 from test54378 where date in (SELECT toDate('2018-04-19')); drop table test54378;