29 lines
958 B
MySQL
29 lines
958 B
MySQL
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-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
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-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
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drop table t;
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exec dbms_random.seed(0);
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create table t(a) tablespace users as select dbms_random.random from dual connect by level <= 10000;
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create index i on t(a);
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@gts t
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@stat changes "update (select a from t where a < 10000) set a = a + 1"
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drop table t;
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exec dbms_random.seed(0);
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create table t(a) tablespace users as select dbms_random.random from dual connect by level <= 10000;
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create index i on t(a);
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@gts t
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@stat changes "update (select /*+ index(t) */ a from t where a < 10000) set a = a + 1"
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drop table t;
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exec dbms_random.seed(0);
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create table t(a) tablespace users as select dbms_random.random from dual connect by level <= 10000 order by 1;
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create index i on t(a);
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@gts t
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@stat changes "update (select /*+ index(t) */ a from t where a < 10000) set a = a + 1"
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