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34 lines
1.1 KiB
Text
34 lines
1.1 KiB
Text
--disable_warnings
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drop table if exists t0,t1,t2,t3;
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--enable_warnings
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--echo #
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--echo # MDEV-7885: EXPLAIN shows wrong info for ORDER BY query
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--echo #
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create table t0(a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1(a int);
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insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
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create table t2 (key1 int, col1 int, key(key1));
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insert into t2 select a,a from t0;
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insert into t2 select 15,15 from t1;
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alter table t2 add key2 int, add key(key2);
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--echo # This must show "Using filesort":
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explain
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select * from t2 ignore index for order by (key1) where col1<0 order by key1 limit 10;
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drop table t0, t1, t2;
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--echo #
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--echo # MDEV-8857: [Upstream too] EXPLAIN incorrectly shows Distinct for tables using join buffer
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--echo #
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create table t0(a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (a int, filler char(200), key(a));
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insert into t1 select A.a + B.a* 10, 'AAAAAAAAAAAAAAAAAAAA' from t0 A, t0 B where B.a in (0,1);
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explain select distinct A.a from t0 A, t1 B where A.a+B.a> 0;
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drop table t0, t1;
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