[GitHub] [hive] shreeyasand opened a new pull request, #4187: HIVE-26900: Error message not representing the correct line number wi…

Sun, 02 Apr 2023 07:51:05 -0700 


shreeyasand opened a new pull request, #4187:
URL: https://github.com/apache/hive/pull/4187

   …th a syntax error in a HQL File
   
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   ### What changes were proposed in this pull request?
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   In the Beeline class: 
   - A new method executeReader() has been introduced specifically to read hql 
files. It makes one string out of all the contents of the hql file separated by 
newline characters (the comments are excluded).
   
   In the Commands class:
   - Since handling multiple lines of query for hql files has already been 
addressed in the executeReader method, we limit the handleMultipleLineCmd() 
method to every other scenario besides when reading an hql file.
   
   In both Beeline.java and Commands.java:
   - Trimming of the string/sql has been removed while reading hql file 
contents. This is achieved whenever getOpts().getScriptFile() equals null (ie 
this is for every situation except when reading an hql file). This is done so 
that the whitespaces and empty lines are not ignored while counting the line 
numbers.
   
   ### Why are the changes needed?
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     1. If you propose a new API, clarify the use case for a new API.
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   - Hive Cli throws error line number correctly when reading HQL files, but 
Beeline does not. These changes are needed so that the error line number is 
thrown correctly and there is no discrepancy between the functioning of Beeline 
and Hive Cli. 
   
   
   ### Does this PR introduce _any_ user-facing change?
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   Note that it means *any* user-facing change including all aspects such as 
the documentation fix.
   If yes, please clarify the previous behavior and the change this PR proposes 
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   - Error message in Beeline was not representing the correct line number 
prior to the changes. Now Beeline prints the correct error line number.
   
   
   
   ### How was this patch tested?
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   - The testing was done locally on Beeline with multiple scenarios. The test 
were verified against the correctly functioning Hive Cli.
   - As an example, for the given hql file:
   <img width="438" alt="Screenshot 2023-03-05 at 11 12 29 PM" 
src="https://user-images.githubusercontent.com/50237152/222977016-e8a72f33-2f47-4ad4-aeff-2afb6f4a3bc9.png";>
   Error message prior to the changes:
   <img width="1495" alt="Screenshot 2023-03-05 at 11 12 05 PM" 
src="https://user-images.githubusercontent.com/50237152/222977044-90f746ee-1958-4c6a-9627-c1c1e2a173cc.png";>
   Error message after the changes:
   <img width="1496" alt="Screenshot 2023-03-05 at 11 10 57 PM" 
src="https://user-images.githubusercontent.com/50237152/222977064-d19b6bb8-b2bc-4292-a24a-1a14d04ab3eb.png";>


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