2019-04-18 18:48:04 +00:00
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drop table if exists tab_00718;
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create table tab_00718 (a String, b LowCardinality(UInt32)) engine = MergeTree order by a;
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insert into tab_00718 values ('a', 1);
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select *, toTypeName(b) from tab_00718;
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alter table tab_00718 modify column b UInt32;
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select *, toTypeName(b) from tab_00718;
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alter table tab_00718 modify column b LowCardinality(UInt32);
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select *, toTypeName(b) from tab_00718;
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alter table tab_00718 modify column b StringWithDictionary;
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select *, toTypeName(b) from tab_00718;
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alter table tab_00718 modify column b LowCardinality(UInt32);
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select *, toTypeName(b) from tab_00718;
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alter table tab_00718 modify column b String;
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select *, toTypeName(b) from tab_00718;
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alter table tab_00718 modify column b LowCardinality(UInt32);
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select *, toTypeName(b) from tab_00718;
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drop table if exists tab_00718;
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