25 lines
1.1 KiB
Plaintext
25 lines
1.1 KiB
Plaintext
# TestAnalyzeLongString
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drop table if exists t;
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set @@session.tidb_analyze_version = 2;
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create table t(a longtext);
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insert into t value(repeat("a",65536));
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insert into t value(repeat("b",65536));
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analyze table t with 0 topn;
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set @@session.tidb_analyze_version = default;
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# TestNotLoadedStatsOnAllNULLCol makes sure that stats on a column that only contains NULLs can be used even when it's
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# not loaded. This is reasonable because it makes no difference whether it's loaded or not.
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drop table if exists t1;
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drop table if exists t2;
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create table t1(a int);
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create table t2(a int);
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insert into t1 values(null), (null), (null), (null);
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insert into t2 values(null), (null);
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analyze table t1 all columns;
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analyze table t2 all columns;
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explain format = 'plan_tree' select * from t1 left join t2 on t1.a=t2.a order by t1.a, t2.a;
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explain format = 'plan_tree' select * from t2 left join t1 on t1.a=t2.a order by t1.a, t2.a;
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explain format = 'plan_tree' select * from t1 right join t2 on t1.a=t2.a order by t1.a, t2.a;
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explain format = 'plan_tree' select * from t2 right join t1 on t1.a=t2.a order by t1.a, t2.a;
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