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From "Syed S. Albiz (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-2155) Improve error messages emitted during semantic analysis
Date Mon, 09 May 2011 23:51:03 GMT
Improve error messages emitted during semantic analysis
-------------------------------------------------------

                 Key: HIVE-2155
                 URL: https://issues.apache.org/jira/browse/HIVE-2155
             Project: Hive
          Issue Type: Improvement
            Reporter: Syed S. Albiz
            Assignee: Syed S. Albiz


Follow-up to HIVE-1731.
A number of issues raised in HIVE-1731 were caused by SemanticAnalyzer not reporting errors
correctly.
Specifically, the following issues need to be addressed:
- Line numbers are not always provided and sometimes emitted as (0:-1), which is useless
- Insufficient or unclear context strings are provided

Specific issues described in HIVE-1731:
FAILED: Error in semantic analysis: Schema of both sides of union should match: destinationid:_col1
_col2
* No line/col numbers, context strings provide internal aliases instead of actual column names

FAILED: Error in semantic analysis: line 0:-1 Both Left and Right Aliases Encountered in Join
time
* Incorrect line/col number info, no context strings to describe the aliases encountered

FAILED: Error in semantic analysis: AS clause has an invalid number of aliases
* No line/col numbers, not context string to show the aliases encountered

FAILED: Error in semantic analysis: line 1:94 Expression Not In Group By Key a
* testcase: SELECT a.id, VAR(a.cnt) FROM mytable a
* Context string is unhelpful, needs to provide the actual expression, not just the table
reference

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