[jira] [Updated] (HIVE-10971) count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true
[ https://issues.apache.org/jira/browse/HIVE-10971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] wangmeng updated HIVE-10971: Attachment: HIVE-10971.01.patch count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true --- Key: HIVE-10971 URL: https://issues.apache.org/jira/browse/HIVE-10971 Project: Hive Issue Type: Bug Components: Logical Optimizer Affects Versions: 1.2.0 Reporter: wangmeng Assignee: wangmeng Attachments: HIVE-10971.01.patch When hive.groupby.skewindata=true, the following query based on TPC-H gives wrong results: {code} set hive.groupby.skewindata=true; select l_returnflag, count(*), count(distinct l_linestatus) from lineitem group by l_returnflag limit 10; {code} The query plan shows that it generates only one MapReduce job instead of two theoretically, which is dictated by hive.groupby.skewindata=true. The problem arises only when {noformat}count(*){noformat} and {noformat}count(distinct){noformat} exist together. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HIVE-10971) count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true
[ https://issues.apache.org/jira/browse/HIVE-10971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] wangmeng updated HIVE-10971: Component/s: (was: Hive) Logical Optimizer count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true --- Key: HIVE-10971 URL: https://issues.apache.org/jira/browse/HIVE-10971 Project: Hive Issue Type: Bug Components: Logical Optimizer Affects Versions: 1.2.0 Reporter: wangmeng Assignee: wangmeng When hive.groupby.skewindata=true, the following query based on TPC-H gives wrong results: {code} set hive.groupby.skewindata=true; select l_returnflag, count(*), count(distinct l_linestatus) from lineitem group by l_returnflag limit 10; {code} The query plan shows that it generates only one MapReduce job instead of two theoretically, which is dictated by hive.groupby.skewindata=true. The problem arises only when {noformat}count(*){noformat} and {noformat}count(distinct){noformat} exist together. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HIVE-10971) count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true
[ https://issues.apache.org/jira/browse/HIVE-10971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] wangmeng updated HIVE-10971: Attachment: HIVE-10971.01.patch count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true --- Key: HIVE-10971 URL: https://issues.apache.org/jira/browse/HIVE-10971 Project: Hive Issue Type: Bug Components: Logical Optimizer Affects Versions: 1.2.0 Reporter: wangmeng Assignee: wangmeng Attachments: HIVE-10971.01.patch, HIVE-10971.01.patch When hive.groupby.skewindata=true, the following query based on TPC-H gives wrong results: {code} set hive.groupby.skewindata=true; select l_returnflag, count(*), count(distinct l_linestatus) from lineitem group by l_returnflag limit 10; {code} The query plan shows that it generates only one MapReduce job instead of two theoretically, which is dictated by hive.groupby.skewindata=true. The problem arises only when {noformat}count(*){noformat} and {noformat}count(distinct){noformat} exist together. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HIVE-10971) count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true
[ https://issues.apache.org/jira/browse/HIVE-10971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] wangmeng updated HIVE-10971: Attachment: (was: HIVE-10971.01.patch) count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true --- Key: HIVE-10971 URL: https://issues.apache.org/jira/browse/HIVE-10971 Project: Hive Issue Type: Bug Components: Logical Optimizer Affects Versions: 1.2.0 Reporter: wangmeng Assignee: wangmeng Attachments: HIVE-10971.01.patch When hive.groupby.skewindata=true, the following query based on TPC-H gives wrong results: {code} set hive.groupby.skewindata=true; select l_returnflag, count(*), count(distinct l_linestatus) from lineitem group by l_returnflag limit 10; {code} The query plan shows that it generates only one MapReduce job instead of two theoretically, which is dictated by hive.groupby.skewindata=true. The problem arises only when {noformat}count(*){noformat} and {noformat}count(distinct){noformat} exist together. -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (HIVE-10971) count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true
[ https://issues.apache.org/jira/browse/HIVE-10971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] wangmeng updated HIVE-10971: Description: When hive.groupby.skewindata=true, the following query based on TPC-H gives wrong results: {code} set hive.groupby.skewindata=true; select l_returnflag, count(*), count(distinct l_linestatus) from lineitem group by l_returnflag limit 10; {code} The query plan shows that it generates only one MapReduce job instead of two theoretically, which is dictated by hive.groupby.skewindata=true. The problem arises only when {noformat}count(*){noformat} and {noformat}count(distinct){noformat} exist together. was: When hive.groupby.skewindata=true, the following query based on TPC-H gives wrong results: {code} set hive.groupby.skewindata=true; select l_returnflag, count(*), count(distinct l_linestatus) from lineitem group by l_returnflag limit 10; {code} The query plan shows that it generates only one MapReduce job instead of two, which is dictated by hive.groupby.skewindata=true. The problem arises only when {noformat}count(*){noformat} and {noformat}count(distinct){noformat} exist together. count(*) with count(distinct) gives wrong results when hive.groupby.skewindata=true --- Key: HIVE-10971 URL: https://issues.apache.org/jira/browse/HIVE-10971 Project: Hive Issue Type: Bug Components: Hive Affects Versions: 1.2.0 Reporter: wangmeng Assignee: wangmeng When hive.groupby.skewindata=true, the following query based on TPC-H gives wrong results: {code} set hive.groupby.skewindata=true; select l_returnflag, count(*), count(distinct l_linestatus) from lineitem group by l_returnflag limit 10; {code} The query plan shows that it generates only one MapReduce job instead of two theoretically, which is dictated by hive.groupby.skewindata=true. The problem arises only when {noformat}count(*){noformat} and {noformat}count(distinct){noformat} exist together. -- This message was sent by Atlassian JIRA (v6.3.4#6332)