2021-09-12 12:35:27 +00:00
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-- Tags: distributed
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2020-06-06 16:19:16 +00:00
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drop table if exists merge_distributed;
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drop table if exists merge_distributed1;
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create table merge_distributed1 ( CounterID UInt32, StartDate Date, Sign Int8, VisitID UInt64, UserID UInt64, StartTime DateTime, ClickLogID UInt64) ENGINE = CollapsingMergeTree(StartDate, intHash32(UserID), tuple(CounterID, StartDate, intHash32(UserID), VisitID, ClickLogID), 8192, Sign);
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insert into merge_distributed1 values (1, '2013-09-19', 1, 0, 2, '2013-09-19 12:43:06', 3);
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create table merge_distributed ( CounterID UInt32, StartDate Date, Sign Int8, VisitID UInt64, UserID UInt64, StartTime DateTime, ClickLogID UInt64) ENGINE = Distributed(test_shard_localhost, currentDatabase(), merge_distributed1);
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alter table merge_distributed1 add column dummy String after CounterID;
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alter table merge_distributed add column dummy String after CounterID;
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describe table merge_distributed;
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show create table merge_distributed;
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insert into merge_distributed1 values (1, 'Hello, Alter Table!','2013-09-19', 1, 0, 2, '2013-09-19 12:43:06', 3);
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select CounterID, dummy from merge_distributed where dummy <> '' limit 10;
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alter table merge_distributed drop column dummy;
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describe table merge_distributed;
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show create table merge_distributed;
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--error: should fall, because there is no `dummy1` column
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alter table merge_distributed add column dummy1 String after CounterID;
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select CounterID, dummy1 from merge_distributed where dummy1 <> '' limit 10; -- { serverError 47 }
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drop table merge_distributed;
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drop table merge_distributed1;
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