Adrodoc ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5b2a4a0... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiOGJhNmIyODRi... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16589?atlOrigin=eyJpIjoiOGJhNm... ) HHH-16589 ( https://hibernate.atlassian.net/browse/HHH-16589?atlOrigin=eyJpIjoiOGJhNm... ) In-Clause Parameter Padding mistreats Dilect.getInExpressionCountLimit which can cause ORA-01795: maximum number of expressions in a list is 1000 ( https://hibernate.atlassian.net/browse/HHH-16589?atlOrigin=eyJpIjoiOGJhNm... ) Issue Type: Bug Affects Versions: 6.2.1, 6.2.2 Assignee: Unassigned Created: 11/May/2023 04:55 AM Priority: Major Reporter: Adrodoc ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5b2a4a0... ) If you enable hibernate.query.in_clause_parameter_padding in {{persistence.xml}}and then execute the following query with 1900 parameters: select m from MyEntity m where m.id in ?1 You will get this error ORA-01795: maximum number of expressions in a list is 1000. The issue lies in AbstractSqlAstTranslator : if there are more listExpressions than inExprLimit and inClauseParameterPaddingEnabled is true then bindValueMaxCount is calculated as ceilingPowerOfTwo( bindValueCount % inExprLimit ). In our example this is ceilingPowerOfTwo(1900 % 1000) == 1024. This result is then used to pad the last in clause without checking inExprLimit again: https://github.com/hibernate/hibernate-orm/blob/6746c30275b6600622d82613d... if ( inClauseParameterPaddingEnabled ) { final Expression lastExpression = itemAccessor.apply( listExpressions.get( listExpressions.size() - 1 ) ); for ( ; `; itemNumber++ ) { appendSql( separator ); lastExpression.accept( this ); separator = COMA_SEPARATOR; } } A simple fix would be to change the condition of this for-loop to itemNumber < Math.min(bindValueMaxCount, inExprLimit) , but I feel like the whole calculation could be simplified. ( https://hibernate.atlassian.net/browse/HHH-16589#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16589#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100225- sha1:84d3b45 )