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https://github.com/ClickHouse/ClickHouse.git
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25 lines
1.2 KiB
SQL
25 lines
1.2 KiB
SQL
drop table if exists txn_counters;
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create table txn_counters (n Int64, mintid DEFAULT transactionID()) engine=MergeTree order by n;
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insert into txn_counters(n) values (1);
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select transactionID();
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-- stop background cleanup
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system stop merges txn_counters;
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begin transaction;
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insert into txn_counters(n) values (2);
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select 1, system.parts.name, txn_counters.mintid = system.parts.mintid from txn_counters join system.parts on txn_counters._part = system.parts.name where database=currentDatabase() and table='txn_counters' order by system.parts.name;
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select 2, name, mincsn, maxtid, maxcsn from system.parts where database=currentDatabase() and table='txn_counters' order by system.parts.name;
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rollback;
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begin transaction;
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insert into txn_counters(n) values (3);
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select 3, system.parts.name, txn_counters.mintid = system.parts.mintid from txn_counters join system.parts on txn_counters._part = system.parts.name where database=currentDatabase() and table='txn_counters' order by system.parts.name;
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select 4, name, mincsn, maxtid, maxcsn from system.parts where database=currentDatabase() and table='txn_counters' order by system.parts.name;
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select 5, transactionID().3 == serverUUID();
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commit;
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drop table txn_counters;
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