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https://issues.apache.org/jira/browse/HIVE-1916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13081985#comment-13081985
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[email protected] commented on HIVE-1916:
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trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
<https://reviews.apache.org/r/1441/#comment3136>
Please add these definitions to hive-default.xml along with a description
for each property.
trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
<https://reviews.apache.org/r/1441/#comment3140>
These are initialized in the constructor. Please don't also initialize them
here.
trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
<https://reviews.apache.org/r/1441/#comment3137>
Please run checkstyle and correct any violations introduced by your changes.
trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
<https://reviews.apache.org/r/1441/#comment3142>
Create a static final variable for the 20 char length limit.
- Carl
On 2011-08-09 22:40:56, sameerm wrote:
bq.
bq. -----------------------------------------------------------
bq. This is an automatically generated e-mail. To reply, visit:
bq. https://reviews.apache.org/r/1441/
bq. -----------------------------------------------------------
bq.
bq. (Updated 2011-08-09 22:40:56)
bq.
bq.
bq. Review request for hive and Ning Zhang.
bq.
bq.
bq. Summary
bq. -------
bq.
bq. Default behavior will be as before.
bq. Adding new Hive conf vars to make the column names include the aggregation
function and params.
bq.
bq.
bq. This addresses bug HIVE-1916.
bq. https://issues.apache.org/jira/browse/HIVE-1916
bq.
bq.
bq. Diffs
bq. -----
bq.
bq. trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java 1155181
bq. trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
1155181
bq. trunk/ql/src/test/queries/clientpositive/autogen_colname.q PRE-CREATION
bq. trunk/ql/src/test/results/clientpositive/autogen_colname.q.out
PRE-CREATION
bq.
bq. Diff: https://reviews.apache.org/r/1441/diff
bq.
bq.
bq. Testing
bq. -------
bq.
bq. Added new query file with expected results. All unit tests pass
bq.
bq.
bq. Thanks,
bq.
bq. sameerm
bq.
bq.
> Change Default Alias For Aggregated Columns (_c1)
> -------------------------------------------------
>
> Key: HIVE-1916
> URL: https://issues.apache.org/jira/browse/HIVE-1916
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Environment: All
> Reporter: James Mayfield
> Priority: Minor
>
> Problem:
> When running a Hive query that aggregates (does a group by operation), Hive
> will automatically name this column _c0, _c1, _c2, etc.. This is a problem
> because Hive will not then execute a query against a column that begins with
> "_" and then the user has to manually input back-ticks in order to get the
> query to run.
> Potential Solution:
> Hive should by default call these columns by their query assignment like
> "sum_active30day_users" or if that is not possible, call it something simple
> like "column_1" so that users can then query the new column without adding
> special back-ticks.
> Example Query:
> SELECT a.ds, COUNT(a.num_accounts)
> Example Result:
> ds, count_num_accounts OR ds, column_1
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