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