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Posted to dev@hive.apache.org by "Keegan Mosley (JIRA)" <ji...@apache.org> on 2012/07/06 03:00:54 UTC
[jira] [Created] (HIVE-3236) allow column names to be prefixed by
table alias in select all queries
Keegan Mosley created HIVE-3236:
-----------------------------------
Summary: allow column names to be prefixed by table alias in select all queries
Key: HIVE-3236
URL: https://issues.apache.org/jira/browse/HIVE-3236
Project: Hive
Issue Type: Improvement
Components: Query Processor
Affects Versions: 0.10.0, 0.9.1
Reporter: Keegan Mosley
Priority: Minor
When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
There should be some conf flag that would allow queries like
"create table joined as select one.*, two.* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
to create a table with columns one_duplicate_field and two_duplicate_field.
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[jira] [Updated] (HIVE-3236) allow column names to be prefixed by
table alias in select all queries
Posted by "Keegan Mosley (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-3236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Keegan Mosley updated HIVE-3236:
--------------------------------
Description:
When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
There should be some conf flag that would allow queries like
"create table joined as select one.*, two.* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
to create a table with columns one_duplicate_field and two_duplicate_field.
was:
When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
There should be some conf flag that would allow queries like
"create table joined as select one.*, two.* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
to create a table with columns one_duplicate_field and two_duplicate_field.
> allow column names to be prefixed by table alias in select all queries
> ----------------------------------------------------------------------
>
> Key: HIVE-3236
> URL: https://issues.apache.org/jira/browse/HIVE-3236
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Affects Versions: 0.10.0, 0.9.1
> Reporter: Keegan Mosley
> Priority: Minor
> Fix For: 0.10.0
>
> Attachments: HIVE-3236.1.patch.txt
>
>
> When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
> There should be some conf flag that would allow queries like
> "create table joined as select one.*, two.* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
> to create a table with columns one_duplicate_field and two_duplicate_field.
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[jira] [Updated] (HIVE-3236) allow column names to be prefixed by
table alias in select all queries
Posted by "Keegan Mosley (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-3236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Keegan Mosley updated HIVE-3236:
--------------------------------
Fix Version/s: 0.10.0
Status: Patch Available (was: Open)
> allow column names to be prefixed by table alias in select all queries
> ----------------------------------------------------------------------
>
> Key: HIVE-3236
> URL: https://issues.apache.org/jira/browse/HIVE-3236
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Affects Versions: 0.10.0, 0.9.1
> Reporter: Keegan Mosley
> Priority: Minor
> Fix For: 0.10.0
>
> Attachments: HIVE-3236.1.patch.txt
>
>
> When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
> There should be some conf flag that would allow queries like
> "create table joined as select one.*, two.* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
> to create a table with columns one_duplicate_field and two_duplicate_field.
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[jira] [Updated] (HIVE-3236) allow column names to be prefixed by
table alias in select all queries
Posted by "Keegan Mosley (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-3236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Keegan Mosley updated HIVE-3236:
--------------------------------
Attachment: HIVE-3236.1.patch.txt
> allow column names to be prefixed by table alias in select all queries
> ----------------------------------------------------------------------
>
> Key: HIVE-3236
> URL: https://issues.apache.org/jira/browse/HIVE-3236
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Affects Versions: 0.10.0, 0.9.1
> Reporter: Keegan Mosley
> Priority: Minor
> Fix For: 0.10.0
>
> Attachments: HIVE-3236.1.patch.txt
>
>
> When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
> There should be some conf flag that would allow queries like
> "create table joined as select one.*, two.* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
> to create a table with columns one_duplicate_field and two_duplicate_field.
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[jira] [Updated] (HIVE-3236) allow column names to be prefixed by
table alias in select all queries
Posted by "Keegan Mosley (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-3236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Keegan Mosley updated HIVE-3236:
--------------------------------
Description:
When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
There should be some conf flag that would allow queries like
"create table joined as select one.\*, two.\* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
to create a table with columns one_duplicate_field and two_duplicate_field.
was:
When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
There should be some conf flag that would allow queries like
"create table joined as select one.*, two.* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
to create a table with columns one_duplicate_field and two_duplicate_field.
> allow column names to be prefixed by table alias in select all queries
> ----------------------------------------------------------------------
>
> Key: HIVE-3236
> URL: https://issues.apache.org/jira/browse/HIVE-3236
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Affects Versions: 0.10.0, 0.9.1
> Reporter: Keegan Mosley
> Priority: Minor
> Fix For: 0.10.0
>
> Attachments: HIVE-3236.1.patch.txt
>
>
> When using "CREATE TABLE x AS SELECT ..." where the select joins tables with hundreds of columns it is not a simple task to resolve duplicate column name exceptions (particularly with self-joins). The user must either manually specify aliases for all duplicate columns (potentially hundreds) or write a script to generate the data set in a separate select query, then create the table and load the data in.
> There should be some conf flag that would allow queries like
> "create table joined as select one.\*, two.\* from mytable one join mytable two on (one.duplicate_field = two.duplicate_field1);"
> to create a table with columns one_duplicate_field and two_duplicate_field.
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