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41 lines
1.6 KiB
SQL
41 lines
1.6 KiB
SQL
drop table if exists defaulted;
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create table defaulted (col1 default 0) engine=Memory;
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desc table defaulted;
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drop table defaulted;
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create table defaulted (col1 UInt32, col2 default col1 + 1, col3 materialized col1 + 2, col4 alias col1 + 3) engine=Memory;
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desc table defaulted;
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insert into defaulted (col1) values (10);
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select * from defaulted;
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select col3, col4 from defaulted;
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drop table defaulted;
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create table defaulted (col1 Int8, col2 UInt64 default (SELECT dummy+99 from system.one)) engine=Memory;
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insert into defaulted (col1) values (0);
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select col2 from defaulted;
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drop table defaulted;
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create table defaulted (payload String, date materialized today(), key materialized 0 * rand()) engine=MergeTree(date, key, 8192);
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desc table defaulted;
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insert into defaulted (payload) values ('hello clickhouse');
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select * from defaulted;
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alter table defaulted add column payload_length UInt64 materialized length(payload);
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desc table defaulted;
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select *, payload_length from defaulted;
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insert into defaulted (payload) values ('some string');
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select *, payload_length from defaulted order by payload;
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select *, payload_length from defaulted order by payload;
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alter table defaulted modify column payload_length default length(payload);
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desc table defaulted;
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select * from defaulted order by payload;
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alter table defaulted modify column payload_length default length(payload) % 65535;
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desc table defaulted;
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select * from defaulted order by payload;
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alter table defaulted modify column payload_length UInt16 default length(payload);
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desc table defaulted;
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alter table defaulted drop column payload_length;
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desc table defaulted;
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select * from defaulted order by payload;
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drop table defaulted;
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