mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-19 15:01:03 +00:00
43 lines
1.6 KiB
SQL
43 lines
1.6 KiB
SQL
SET replication_alter_partitions_sync = 2;
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DROP TABLE IF EXISTS test.attach_r1;
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DROP TABLE IF EXISTS test.attach_r2;
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CREATE TABLE test.attach_r1 (d Date) ENGINE = ReplicatedMergeTree('/clickhouse/tables/01/attach', 'r1', d, d, 8192);
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INSERT INTO test.attach_r1 VALUES ('2014-01-01'), ('2014-02-01'), ('2014-03-01');
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SELECT d FROM test.attach_r1 ORDER BY d;
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ALTER TABLE test.attach_r1 DETACH PARTITION 201402;
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SELECT '---';
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SELECT d FROM test.attach_r1 ORDER BY d;
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CREATE TABLE test.attach_r2 (d Date) ENGINE = ReplicatedMergeTree('/clickhouse/tables/01/attach', 'r2', d, d, 8192);
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ALTER TABLE test.attach_r1 ATTACH PARTITION 201402;
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SELECT '---';
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SELECT d FROM test.attach_r1 ORDER BY d;
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-- так как куски скачиваются параллельно, в произвольном порядке, то наличие кусков отличных от ATTACH-енного в данный момент не гарантируется
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-- наличие ATTACH-енного куска гарантируется настройкой replication_alter_partitions_sync - проверим это
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SELECT d FROM test.attach_r2 WHERE d = '2014-02-01' ORDER BY d;
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ALTER TABLE test.attach_r1 DETACH PARTITION 201401;
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ALTER TABLE test.attach_r1 DETACH PARTITION 201403;
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SELECT '---';
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SELECT d FROM test.attach_r1 ORDER BY d;
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SELECT d FROM test.attach_r2 ORDER BY d;
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ALTER TABLE test.attach_r1 ATTACH PARTITION 201401;
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ALTER TABLE test.attach_r1 ATTACH PARTITION 201403;
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SELECT '---';
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SELECT d FROM test.attach_r1 ORDER BY d;
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SELECT d FROM test.attach_r2 ORDER BY d;
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DROP TABLE test.attach_r1;
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DROP TABLE test.attach_r2;
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