Sergey Shelukhin created HIVE-14970:
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Summary: repeated insert into is broken for buckets (incorrect
results)
Key: HIVE-14970
URL: https://issues.apache.org/jira/browse/HIVE-14970
Project: Hive
Issue Type: Bug
Reporter: Sergey Shelukhin
Priority: Critical
{noformat}
CREATE TABLE src_bucket(key STRING, value STRING) CLUSTERED BY (key) SORTED BY
(key) INTO 2 BUCKETS;
insert into table src_bucket select key,value from srcpart limit 10;
dfs -ls ${hiveconf:hive.metastore.warehouse.dir}/src_bucket/;
select *, INPUT__FILE__NAME from src_bucket;
select * from src_bucket tablesample (bucket 1 out of 2) s;
select * from src_bucket tablesample (bucket 2 out of 2) s;
insert into table src_bucket select key,value from srcpart limit 10;
dfs -ls ${hiveconf:hive.metastore.warehouse.dir}/src_bucket/;
select *, INPUT__FILE__NAME from src_bucket;
select * from src_bucket tablesample (bucket 1 out of 2) s;
select * from src_bucket tablesample (bucket 2 out of 2) s;
{noformat}
Results in the following (with masking disabled and grepping away the noise).
Looks like bucket mapping completely breaks due to extra files, which may have
implications for all the optimizations that depend on them.
This should work or at least fail if this is not supported.
{noformat}
PREHOOK: query: CREATE TABLE src_bucket(key STRING, value STRING) CLUSTERED BY
(key) SORTED BY (key) INTO 2 BUCKETS
PREHOOK: query: insert into table src_bucket select key,value from srcpart
limit 10
Found 2 items
-rwxr-xr-x 1 sergey staff 46 2016-10-14 16:09
pfile:///Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
-rwxr-xr-x 1 sergey staff 68 2016-10-14 16:09
pfile:///Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
PREHOOK: query: select *, INPUT__FILE__NAME from src_bucket
165 val_165
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
255 val_255
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
484 val_484
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
86 val_86
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
238 val_238
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
27 val_27
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
278 val_278
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
311 val_311
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
409 val_409
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
98 val_98
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
PREHOOK: query: select * from src_bucket tablesample (bucket 1 out of 2) s
165 val_165
255 val_255
484 val_484
86 val_86
PREHOOK: query: select * from src_bucket tablesample (bucket 2 out of 2) s
238 val_238
27 val_27
278 val_278
311 val_311
409 val_409
98 val_98
PREHOOK: query: insert into table src_bucket select key,value from srcpart
limit 10
Found 4 items
-rwxr-xr-x 1 sergey staff 46 2016-10-14 16:09
pfile:///Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
-rwxr-xr-x 1 sergey staff 46 2016-10-14 16:09
pfile:///Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0_copy_1
-rwxr-xr-x 1 sergey staff 68 2016-10-14 16:09
pfile:///Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
-rwxr-xr-x 1 sergey staff 68 2016-10-14 16:09
pfile:///Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0_copy_1
PREHOOK: query: select *, INPUT__FILE__NAME from src_bucket
165 val_165
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
255 val_255
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
484 val_484
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
86 val_86
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0
165 val_165
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0_copy_1
255 val_255
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0_copy_1
484 val_484
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0_copy_1
86 val_86
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000000_0_copy_1
238 val_238
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
27 val_27
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
278 val_278
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
311 val_311
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
409 val_409
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
98 val_98
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0
238 val_238
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0_copy_1
27 val_27
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0_copy_1
278 val_278
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0_copy_1
311 val_311
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0_copy_1
409 val_409
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0_copy_1
98 val_98
pfile:/Users/sergey/git/hive/itests/qtest/target/warehouse/src_bucket/000001_0_copy_1
PREHOOK: query: select * from src_bucket tablesample (bucket 1 out of 2) s
165 val_165
255 val_255
484 val_484
86 val_86
PREHOOK: query: select * from src_bucket tablesample (bucket 2 out of 2) s
{noformat}
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