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https://issues.apache.org/jira/browse/HIVE-21411?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16790246#comment-16790246
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Vineet Garg commented on HIVE-21411:
------------------------------------
[~tianmenglan2016] Can you provide reproducer (including schema/data)?
> LEFT JOIN CONVERT TO INNER JOIN LEAD TO WRONG RESULT
> ----------------------------------------------------
>
> Key: HIVE-21411
> URL: https://issues.apache.org/jira/browse/HIVE-21411
> Project: Hive
> Issue Type: Bug
> Affects Versions: 2.1.1, 2.2.0, 2.3.0
> Reporter: xialu
> Assignee: Ashutosh Chauhan
> Priority: Critical
>
> when i have not assign alias table name to the left side table , left join
> convert to inner join. left side table's alias in ast tree called left.
> for example
> select nvl(ss_wholesale_cost, 10), d_quarter_name from lulu.store_sales left
> join lulu.date_dim on ss_sold_date_sk = d_date_sk limit 10;
> {noformat}
> | STAGE DEPENDENCIES: |
> | Stage-1 is a root stage |
> | Stage-0 depends on stages: Stage-1 |
> | |
> | STAGE PLANS: |
> | Stage: Stage-1 |
> | Map Reduce |
> | Map Operator Tree: |
> | TableScan |
> | alias: left |
> | Statistics: Num rows: 200 Data size: 28499 Basic stats: COMPLETE Column
> stats: NONE |
> | Filter Operator |
> | predicate: ss_sold_date_sk is not null (type: boolean) |
> | Statistics: Num rows: 200 Data size: 28499 Basic stats: COMPLETE Column
> stats: NONE |
> | Select Operator |
> | expressions: ss_wholesale_cost (type: decimal(7,2)), ss_sold_date_sk (type:
> bigint) |
> | outputColumnNames: _col0, _col1 |
> | Statistics: Num rows: 200 Data size: 28499 Basic stats: COMPLETE Column
> stats: NONE |
> | Reduce Output Operator |
> | key expressions: _col1 (type: bigint) |
> | sort order: + |
> | Map-reduce partition columns: _col1 (type: bigint) |
> | Statistics: Num rows: 200 Data size: 28499 Basic stats: COMPLETE Column
> stats: NONE |
> | value expressions: _col0 (type: decimal(7,2)) |
> | TableScan |
> | alias: date_dim |
> | Statistics: Num rows: 200 Data size: 25639 Basic stats: COMPLETE Column
> stats: NONE |
> | Filter Operator |
> | predicate: d_date_sk is not null (type: boolean) |
> | Statistics: Num rows: 200 Data size: 25639 Basic stats: COMPLETE Column
> stats: NONE |
> | Select Operator |
> | expressions: d_date_sk (type: bigint), d_quarter_name (type: string) |
> | outputColumnNames: _col0, _col1 |
> | Statistics: Num rows: 200 Data size: 25639 Basic stats: COMPLETE Column
> stats: NONE |
> | Reduce Output Operator |
> | key expressions: _col0 (type: bigint) |
> | sort order: + |
> | Map-reduce partition columns: _col0 (type: bigint) |
> | Statistics: Num rows: 200 Data size: 25639 Basic stats: COMPLETE Column
> stats: NONE |
> | value expressions: _col1 (type: string) |
> | Reduce Operator Tree: |
> | Join Operator |
> | condition map: |
> | Inner Join 0 to 1 |
> | keys: |
> | 0 _col1 (type: bigint) |
> | 1 _col0 (type: bigint) |
> | outputColumnNames: _col0, _col3 |
> | Statistics: Num rows: 220 Data size: 31348 Basic stats: COMPLETE Column
> stats: NONE |
> | Select Operator |
> | expressions: NVL(_col0,10) (type: decimal(12,2)), _col3 (type: string) |
> | outputColumnNames: _col0, _col1 |
> | Statistics: Num rows: 220 Data size: 31348 Basic stats: COMPLETE Column
> stats: NONE |
> | Limit |
> | Number of rows: 100 |
> | Statistics: Num rows: 100 Data size: 14200 Basic stats: COMPLETE Column
> stats: NONE |
> | File Output Operator |
> | compressed: false |
> | Statistics: Num rows: 100 Data size: 14200 Basic stats: COMPLETE Column
> stats: NONE |
> | table: |
> | input format: org.apache.hadoop.mapred.SequenceFileInputFormat |
> | output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat |
> | serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe |
> | |
> | Stage: Stage-0 |
> | Fetch Operator |
> | limit: 100 |
> | Processor Tree: |
> | ListSink |
> | |
> +--------------------------------------------------------------------------------------------------------+--+
> {noformat}
>
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