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add test for #8914
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drop table if exists t50;
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create table t50 (a Int, b Int, s String) engine = MergeTree order by a settings index_granularity = 50, index_granularity_bytes=1000;
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-- some magic to satisfy conditions to run optimizations in MergeTreeRangeReader
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insert into t50 select 0, 1, repeat('a', 10000);
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insert into t50 select number, multiIf(number < 5, 1, number < 50, 0, number < 55, 1, number < 100, 0, number < 105, 1, 0), '' from numbers(150);
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optimize table t50 final;
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select a, b from t50 prewhere b = 1 order by a;
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