42 lines
1014 B
Plaintext
42 lines
1014 B
Plaintext
--disable_query_log
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set @@session.explicit_defaults_for_timestamp=off;
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--enable_query_log
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#owner: link.zt
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#owner group: sql1
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--disable_abort_on_error
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#
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# Test of update and delete with limit
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#
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--disable_warnings
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drop table if exists t1;
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--enable_warnings
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create table t1(a int primary key,b int);
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insert into t1(a) values(1),(2),(3);
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select * from t1 limit 0;
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select * from t1 limit 1;
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select * from t1 limit 3;
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select * from t1 limit 4;
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# netsed limit，用来测试limit算子自身的re_est_cost(...)函数
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select /*+no_rewrite*/ * from (select * from t1 order by b limit 4) AS t2 limit 2;
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#--error 1146
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select * from t1 limit -1;
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drop table t1;
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create table t1 (a int primary key,b int);
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insert into t1(a) values (1),(2),(3),(4),(5),(6),(7);
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select * FROM t1 ORDER BY a desc LIMIT 3;
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select * FROM t1 ORDER BY a desc LIMIT 0;
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select * FROM t1 ORDER BY a desc LIMIT 8;
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select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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drop table t1;
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