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https://issues.apache.org/jira/browse/DERBY-6185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633211#comment-13633211
]
Rong Qu commented on DERBY-6185:
--------------------------------
Forgot to mention that the same query worked fine if the query is against
table, not view.
> 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: 10.8.2.2, 10.8.3.0
> Environment: windows 7
> Reporter: Rong Qu
>
> 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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