[
https://issues.apache.org/jira/browse/HIVE-19863?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Vineet Garg reassigned HIVE-19863:
----------------------------------
> UNION query produce wrong results
> ---------------------------------
>
> Key: HIVE-19863
> URL: https://issues.apache.org/jira/browse/HIVE-19863
> Project: Hive
> Issue Type: Bug
> Components: Query Planning
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
>
> *Reproducer*
> {code:sql}
> SET hive.vectorized.execution.enabled=false;
> set hive.map.aggr=false;
> set hive.strict.checks.bucketing=false;
> set hive.explain.user=true;
> CREATE TABLE src1 (key STRING COMMENT 'default', value STRING COMMENT
> 'default') STORED AS TEXTFILE;
> LOAD DATA LOCAL INPATH "${hiveconf:test.data.dir}/kv3.txt" INTO TABLE src1;
> ANALYZE TABLE src1 COMPUTE STATISTICS;
> ANALYZE TABLE src1 COMPUTE STATISTICS FOR COLUMNS key,value;
> CREATE TABLE src (key STRING COMMENT 'default', value STRING COMMENT
> 'default') STORED AS TEXTFILE;
> LOAD DATA LOCAL INPATH "${hiveconf:test.data.dir}/kv1.txt" INTO TABLE src;
> ANALYZE TABLE src COMPUTE STATISTICS;
> ANALYZE TABLE src COMPUTE STATISTICS FOR COLUMNS key,value;
> SELECT x.key, z.value, y.value
> FROM src1 x JOIN src y ON (x.key = y.key)
> JOIN (select * from src1 union select * from src)z ON (x.value = z.value)
> union
> SELECT x.key, z.value, y.value
> FROM src1 x JOIN src y ON (x.key = y.key)
> JOIN (select * from src1 union select * from src)z ON (x.value = z.value);
> {code}
> *Expected Result*
> {code:sql}
> 128 val_128
> 146 val_146 val_146
> 150 val_150 val_150
> 213 val_213 val_213
> 224 val_224
> 238 val_238 val_238
> 255 val_255 val_255
> 273 val_273 val_273
> 278 val_278 val_278
> 311 val_311 val_311
> 369 val_369
> 401 val_401 val_401
> 406 val_406 val_406
> 66 val_66 val_66
> 98 val_98 val_98
> {code}
> *Actual Result*
> {code:sql}
> 128
> 146 val_146
> 150 val_150
> 213 val_213
> 224
> 238 val_238
> 255 val_255
> 273 val_273
> 278 val_278
> 311 val_311
> 369
> 401 val_401
> 406 val_406
> 66 val_66
> 98 val_98
> {code}
> One whole column is missing from the result
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