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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6185) Query against view with "where name LIKE 'Col1' ESCAPE '\' " failed
Date Wed, 17 Apr 2013 17:07:17 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13634204#comment-13634204
] 

Mamta A. Satoor commented on DERBY-6185:
----------------------------------------

Hi Knut, I will work on changing the init method(s) for the extra parameter for forQueryRewrite.
It looks like there are two init methods, one with just left & right operand and the other
one with left operand, right operand & an InListOperatorNode. May be we should change
both to have the extra parameter which in most cases will be passed as false but in cases
of cloning, we will pass the original node's forQueryRewrite value. Does that sound right
to you? I will work on the change to see how it goes but would appreciate any feedback.

                
> Query against view  with "where name LIKE 'Col1' ESCAPE '\' " failed
> --------------------------------------------------------------------
>
>                 Key: DERBY-6185
>                 URL: https://issues.apache.org/jira/browse/DERBY-6185
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.1.3.3, 10.5.3.2, 10.8.2.2, 10.8.3.0
>         Environment: windows 7
>            Reporter: Rong Qu
>            Assignee: Mamta A. Satoor
>         Attachments: set-for-rewrite.diff
>
>
> The error can be reproduced,
> 1) create table mytbl1 (name clob(10K));
> 2) create table mytbl2 (name clob(10K));
> 3) create view myview (name) as select t1.name from mytbl1 t1 union all select t2.name
from mytbl2 t2;
> 4) select name from myview where name LIKE 'Col1' ESCAPE '\';
> "4)" failed with error message "
> ERROR 42818: Comparisons between 'CLOB (UCS_BASIC)' and 'CHAR (UCS_BASIC)' are not supported.
Types must be comparable. String types must also have matching collation. If collation does
not match, a possible solution is to cast operands to force them to the default collation
(e.g. SELECT tablename FROM sys.systables WHERE CAST(tablename AS VARCHAR(128)) = 'T1')
> 	at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.BinaryComparisonOperatorNode.bindComparisonOperator(Unknown
Source)
> 	at org.apache.derby.impl.sql.compile.PredicateList.pushExpressionsIntoSelect(Unknown
Source)
> 	at org.apache.derby.impl.sql.compile.UnionNode.pushExpressions(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.UnionNode.pushExpressions(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.ProjectRestrictNode.pushExpressions(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.FromList.pushPredicates(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.SelectNode.preprocess(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.DMLStatementNode.optimizeStatement(Unknown Source)
> 	at org.apache.derby.impl.sql.compile.CursorNode.optimizeStatement(Unknown Source)
> 	at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
> 	at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
> 	at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown
Source)
> 	... 19 more

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