mirror of
https://github.com/ClickHouse/ClickHouse.git
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75 lines
3.3 KiB
SQL
75 lines
3.3 KiB
SQL
set allow_experimental_low_cardinality_type = 1;
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drop table if exists test.lc_str_0;
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drop table if exists test.lc_str_1;
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drop table if exists test.lc_null_str_0;
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drop table if exists test.lc_null_str_1;
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drop table if exists test.lc_int8_0;
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drop table if exists test.lc_int8_1;
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drop table if exists test.lc_null_int8_0;
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drop table if exists test.lc_null_int8_1;
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drop table if exists test.lc_fix_str_0;
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drop table if exists test.lc_fix_str_1;
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drop table if exists test.lc_null_fix_str_0;
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drop table if exists test.lc_null_fix_str_1;
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create table test.lc_str_0 (str LowCardinality(String)) engine = Memory;
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create table test.lc_str_1 (str StringWithDictionary) engine = Memory;
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create table test.lc_null_str_0 (str LowCardinality(Nullable(String))) engine = Memory;
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create table test.lc_null_str_1 (str NullableWithDictionary(String)) engine = Memory;
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create table test.lc_int8_0 (val LowCardinality(Int8)) engine = Memory;
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create table test.lc_int8_1 (val Int8WithDictionary) engine = Memory;
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create table test.lc_null_int8_0 (val LowCardinality(Nullable(Int8))) engine = Memory;
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create table test.lc_null_int8_1 (val NullableWithDictionary(Int8)) engine = Memory;
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create table test.lc_fix_str_0 (str LowCardinality(FixedString(2))) engine = Memory;
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create table test.lc_fix_str_1 (str FixedStringWithDictionary(2)) engine = Memory;
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create table test.lc_null_fix_str_0 (str LowCardinality(Nullable(FixedString(2)))) engine = Memory;
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create table test.lc_null_fix_str_1 (str NullableWithDictionary(FixedString(2))) engine = Memory;
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insert into test.lc_str_0 select 'a';
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insert into test.lc_str_1 select 'a';
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insert into test.lc_null_str_0 select 'a';
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insert into test.lc_null_str_1 select 'a';
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insert into test.lc_int8_0 select 1;
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insert into test.lc_int8_1 select 1;
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insert into test.lc_null_int8_0 select 1;
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insert into test.lc_null_int8_1 select 1;
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insert into test.lc_fix_str_0 select 'ab';
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insert into test.lc_fix_str_1 select 'ab';
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insert into test.lc_null_fix_str_0 select 'ab';
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insert into test.lc_null_fix_str_1 select 'ab';
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select str from test.lc_str_0;
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select str from test.lc_str_1;
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select str from test.lc_null_str_0;
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select str from test.lc_null_str_1;
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select val from test.lc_int8_0;
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select val from test.lc_int8_1;
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select val from test.lc_null_int8_0;
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select val from test.lc_null_int8_1;
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select str from test.lc_fix_str_0;
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select str from test.lc_fix_str_1;
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select str from test.lc_null_fix_str_0;
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select str from test.lc_null_fix_str_1;
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drop table if exists test.lc_str_0;
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drop table if exists test.lc_str_1;
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drop table if exists test.lc_null_str_0;
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drop table if exists test.lc_null_str_1;
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drop table if exists test.lc_int8_0;
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drop table if exists test.lc_int8_1;
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drop table if exists test.lc_null_int8_0;
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drop table if exists test.lc_null_int8_1;
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drop table if exists test.lc_fix_str_0;
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drop table if exists test.lc_fix_str_1;
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drop table if exists test.lc_null_fix_str_0;
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drop table if exists test.lc_null_fix_str_1;
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select '-';
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SELECT toLowCardinality('a') AS s, toTypeName(s), toTypeName(length(s)) from system.one;
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select toLowCardinality('a') as val group by val;
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select (toLowCardinality('a') as val) || 'b' group by val;
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select toLowCardinality(z) as val from (select arrayJoin(['c', 'd']) as z) group by val;
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select (toLowCardinality(z) as val) || 'b' from (select arrayJoin(['c', 'd']) as z) group by val;
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