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21 lines
428 B
SQL
21 lines
428 B
SQL
drop table if exists t;
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create table t (i int, j int) engine MergeTree order by i;
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insert into t values (1, 2);
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alter table t add projection x (select * order by j);
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insert into t values (1, 4);
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insert into t values (1, 5);
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set optimize_use_projections = 1, force_optimize_projection = 1;
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select i from t prewhere j = 4;
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SELECT j = 2, i FROM t PREWHERE j = 2;
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SELECT j = -1, j = NULL FROM t WHERE j = -1;
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drop table t;
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