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From "Satheesh Bandaram (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-13) Quoted names with embedded period mishandled in from list
Date Tue, 28 Dec 2004 01:44:04 GMT
     [ http://nagoya.apache.org/jira/browse/DERBY-13?page=comments#action_57080 ]
Satheesh Bandaram commented on DERBY-13:

I think this is a bind issue, still. For the following query:

select "S1.T1".* from s1.t1; 

"S1.T1" is being considered same as s1.t1. This seems to happen in FromList.java:

public ResultColumnList getResultColumnsForList(String allTableName,ResultColumnList inputRcl,Name
  /* If allTableName is non-null, then we must check to see if it matches 
  * our exposed name.
  if (allTableName != null && ! allTableName.equals(getExposedName()))
	return null;

If all exposed names are being changed to TableNames, like Dan suggested, then this comparison
here should not be a string based comparison.

> Quoted names with embedded period mishandled in from list
> ---------------------------------------------------------
>          Key: DERBY-13
>          URL: http://nagoya.apache.org/jira/browse/DERBY-13
>      Project: Derby
>         Type: Bug
>   Components: SQL
>     Versions:
>     Reporter: Ramandeep Kaur
>     Priority: Minor
>  Attachments: Derby-13.patch
> Opening this bug on behalf of Satheesh Bandaram
> ---------------------------------------------------------
> The compiler mishandles quoted names with embedded periods when 
> checking uniqueness of table names in the from list of a 
> SELECT. Consider the following SQL:
>   create table "S1.T1" (id int not null primary key, d1 int);
>   create schema s1;
>   create table s1.t1 (id int not null primary key, d2 int);
>   select * from s1.t1, "S1.T1" where s1.t1.id = "S1.T1".id;
> Derby throws an error on the final SELECT statement:
> "ERROR 42X09: The table or alias name 'S1.T1' is used more than 
> once in the FROM list". However s1.t1 and "S1.T1" are different 
> tables.

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