Hi, first of all please excuse me for my poor english. i am a java developer, and i'm using hibernate to implement persistence. Using Expression.ilike method i had some compatibility problem becouse of the fixed behaviour of converting fields to lowercase. So i modified org.hibernate.Criteria.LikeExpression and also org.hibernate.Criteria.LikeExpressionIlikeExpression classes, to implement the possibility of choosing the preferred converting mode: either uppercase or lowercase. So what i obtained is something like this: CLASS: org.hibernate.Criteria.IlikeExpression .... @Deprecated protected IlikeExpression(String propertyName, String value, MatchMode matchMode) { this( propertyName, matchMode.toMatchString(value), CONVERT_MODE_LOWER_CASE); } protected IlikeExpression(String propertyName, String value, MatchMode matchMode, int CONVERT_MODE) { this( propertyName, matchMode.toMatchString(value), CONVERT_MODE); } .... CLASS: org.hibernate.Criteria.LikeExpression protected LikeExpression(String propertyName, String value, MatchMode matchMode, Character escapeChar, boolean ignoreCase, int CONVERT_MODE) { this(propertyName, matchMode.toMatchString(value), escapeChar, ignoreCase, CONVERT_MODE); } @Deprecated protected LikeExpression(String propertyName, String value, MatchMode matchMode, Character escapeChar, boolean ignoreCase) { this(propertyName, matchMode.toMatchString(value), escapeChar, ignoreCase, LikeExpression.CONVERT_MODE_LOWER_CASE); } both solutions are compatible with the old behaviour, but now i can choose between uppercase or lowercse convertion. If you think this could be a correct approach to this problem, please answer me and i will give you the whole source code reguarding the modify. Thanks for your attention. Best Regards -- Andrea Tomassi