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https://issues.apache.org/jira/browse/HIVE-19570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Riju Trivedi updated HIVE-19570:
--------------------------------
Summary: Multiple inserts using "Group by" and "Distinct" generates
incorrect results (was: Multiple inserts using "Group by" generates incorrect
results)
> Multiple inserts using "Group by" and "Distinct" generates incorrect results
> -----------------------------------------------------------------------------
>
> Key: HIVE-19570
> URL: https://issues.apache.org/jira/browse/HIVE-19570
> Project: Hive
> Issue Type: Bug
> Components: Logical Optimizer, Query Processor
> Affects Versions: 1.2.0, 3.0.0
> Reporter: Riju Trivedi
> Priority: Critical
>
> Repro steps:
> {code}
> drop database if exists ax1 cascade;
> create database ax1;
> use ax1;
> CREATE TABLE
> tmp1 (
> v1 string , v2 string , v3 string )
> ROW FORMAT DELIMITED
> FIELDS TERMINATED BY '\t'
> LINES TERMINATED BY '\n'
> ;
> INSERT INTO tmp1
> VALUES
> ('a', 'b', 'c1')
> , ('a', 'b', 'c2')
> , ('d', 'e', 'f')
> , ('g', 'h', 'i')
> ;
> CREATE TABLE
> tmp_grouped_by_one_col ( v1 string , cnt__v2 int , cnt__v3 int )
> ROW FORMAT DELIMITED
> FIELDS TERMINATED BY '\t'
> LINES TERMINATED BY '\n'
> ;
> CREATE TABLE
> tmp_grouped_by_two_col ( v1 string , v2 string , cnt__v3 int )
> ROW FORMAT DELIMITED
> FIELDS TERMINATED BY '\t'
> LINES TERMINATED BY '\n'
> ;
> CREATE TABLE
> tmp_grouped_by_all_col ( v1 string , v2 string , v3 string )
> ROW FORMAT DELIMITED
> FIELDS TERMINATED BY '\t'
> LINES TERMINATED BY '\n'
> ;
> FROM tmp1
> INSERT INTO tmp_grouped_by_one_col
> SELECT v1, count(distinct v2), count(distinct v3)
> GROUP BY v1
> INSERT INTO tmp_grouped_by_all_col
> SELECT v1, v2, v3
> GROUP BY v1, v2, v3
> ;
> select 'tmp_grouped_by_one_col',count(*) from tmp_grouped_by_one_col
> union all
> select 'tmp_grouped_by_two_col',count(*) from tmp_grouped_by_two_col
> union all
> select 'tmp_grouped_by_all_col',count(*) from tmp_grouped_by_all_col;
> select * from tmp_grouped_by_all_col;
> {code}
> tmp_grouped_by_all_col table should have 4 reocrds but it loads 7 records
> into the table.
> {code}
> +----------------------------+----------------------------+----------------------------+--+
> | tmp_grouped_by_all_col.v1 | tmp_grouped_by_all_col.v2 |
> tmp_grouped_by_all_col.v3 |
> +----------------------------+----------------------------+----------------------------+--+
> | a | b | b
> |
> | a | c1 | c1
> |
> | a | c2 | c2
> |
> | d | e | e
> |
> | d | f | f
> |
> | g | h | h
> |
> | g | i | i
> |
> +----------------------------+----------------------------+----------------------------+--+
> {code}
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