[
https://issues.apache.org/jira/browse/HIVE-21614?focusedWorklogId=623768&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-623768
]
ASF GitHub Bot logged work on HIVE-21614:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 16/Jul/21 17:22
Start Date: 16/Jul/21 17:22
Worklog Time Spent: 10m
Work Description: hankfanchiu commented on a change in pull request #2484:
URL: https://github.com/apache/hive/pull/2484#discussion_r671413592
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java
##########
@@ -4693,6 +4694,17 @@ private Table ensureGetTable(String catName, String
dbName, String tblName)
return convertToTable(ensureGetMTable(catName, dbName, tblName));
}
+ /**
+ * Conditionally alters an {@link ExpressionTree} to be compatible with
certain database products.
+ */
+ private void reconcileTreeWithDatabaseProduct(ExpressionTree tree) throws
MetaException {
+ if (sqlGenerator.getDbProduct().isDERBY()) {
Review comment:
@findepi mentioned in
https://issues.apache.org/jira/browse/HIVE-21614?focusedCommentId=16849571&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16849571
that Oracle may be implicated as well, but I have not verified.
Having this `ObjectStore#reconcileTreeWithDatabaseProduct` defined allows us
to conveniently add other databases, though, so perhaps we could revisit as
needed?
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Issue Time Tracking
-------------------
Worklog Id: (was: 623768)
Time Spent: 50m (was: 40m)
> Derby does not support CLOB comparisons
> ---------------------------------------
>
> Key: HIVE-21614
> URL: https://issues.apache.org/jira/browse/HIVE-21614
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 2.3.4, 3.0.0
> Reporter: Vlad Rozov
> Assignee: Hank Fanchiu
> Priority: Major
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> HiveMetaStoreClient.listTableNamesByFilter() with non empty filter causes
> exception with Derby DB:
> {noformat}
> Caused by: ERROR 42818: Comparisons between 'CLOB (UCS_BASIC)' and 'CLOB
> (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.iapi.error.StandardException.newException(Unknown
> Source)
> at
> org.apache.derby.impl.sql.compile.BinaryComparisonOperatorNode.bindComparisonOperator(Unknown
> Source)
> at
> org.apache.derby.impl.sql.compile.BinaryComparisonOperatorNode.bindExpression(Unknown
> Source)
> at
> org.apache.derby.impl.sql.compile.BinaryOperatorNode.bindExpression(Unknown
> Source)
> at
> org.apache.derby.impl.sql.compile.BinaryLogicalOperatorNode.bindExpression(Unknown
> Source)
> at org.apache.derby.impl.sql.compile.AndNode.bindExpression(Unknown
> Source)
> at org.apache.derby.impl.sql.compile.SelectNode.bindExpressions(Unknown
> Source)
> at
> org.apache.derby.impl.sql.compile.DMLStatementNode.bindExpressions(Unknown
> Source)
> at org.apache.derby.impl.sql.compile.DMLStatementNode.bind(Unknown
> Source)
> at org.apache.derby.impl.sql.compile.CursorNode.bindStatement(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)
> ... 42 more
> {noformat}
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