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https://issues.apache.org/jira/browse/DERBY-6185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13634204#comment-13634204
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Mamta A. Satoor commented on DERBY-6185:
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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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