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16 lines
518 B
SQL
16 lines
518 B
SQL
drop table if exists t;
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drop table if exists t_mv;
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create table t (x UInt64) engine = MergeTree order by x;
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create materialized view t_mv engine = MergeTree order by tuple() as select uniq(x), bitAnd(x, 255) as y from t group by y;
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set max_bytes_before_external_group_by = 1000000000;
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set group_by_two_level_threshold = 100;
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set min_insert_block_size_rows = 100;
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insert into t select number from numbers(300);
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select count() from (select y from t_mv group by y);
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drop table if exists t;
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drop table if exists t_mv;
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