| set hive.stats.column.autogather=false; |
| set hive.mapred.mode=nonstrict; |
| |
| drop table p; |
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| CREATE TABLE p(a int, b int) partitioned by (c int); |
| |
| desc formatted p; |
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| insert into p partition (c=1) values (1,2); |
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| desc formatted p partition (c=1) a; |
| |
| desc formatted p partition (c=1); |
| |
| explain select max(a) from p where c=1; |
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| analyze table p partition(c=1) compute statistics for columns a; |
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| explain select max(a) from p where c=1; |
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| insert into p partition (c) values (2,3,4); |
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| insert into p partition (c) values (4,5,6); |
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| desc formatted p partition(c=4); |
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| explain select max(a) from p where c=4; |
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| alter table p add partition (c=100); |
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| desc formatted p partition (c=100); |
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| explain select max(a) from p where c=100; |
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| analyze table p partition(c=100) compute statistics for columns a; |
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| explain select max(a) from p where c=100; |
| |
| desc formatted p partition(c=100); |
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| insert into p partition (c=100) values (1,2); |
| |
| analyze table p partition(c=100) compute statistics for columns a; |
| |
| explain select max(a) from p where c=100; |
| |
