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12 lines
349 B
MySQL
12 lines
349 B
MySQL
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drop table if exists tab;
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create table tab (x UInt32) engine = MergeTree order by tuple();
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insert into tab select number from numbers(10);
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set alter_sync = 0;
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alter table tab update x = x + sleepEachRow(0.1) where 1;
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alter table tab modify column x String;
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alter table tab add column y String default x || '_42';
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select x, y from tab order by x;
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