[DERBY-6185] Query against view with "where name LIKE 'Col1' ESCAPE '\' " failed

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 10.1.3.3, 10.5.3.2, 10.8.2.2, 10.8.3.0
• Fix Version/s: 10.8.3.3, 10.9.2.2, 10.10.2.0, 10.11.1.1
• Component/s: SQL
• Environment: windows 7
• Urgency: Normal
• Assignee: Mamta A. Satoor
• Reporter: Rong Qu
• Created: 16/Apr/13 15:41
• Updated: 21/Jan/15 00:23
• Resolved: 26/Apr/13 02:04

Description

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

Issue Links

• is related to: DERBY-5241 The = and <> operators should be supported on CLOBs.