HHH-20069 Remove usage of non-existing rowid_ column on DB2 for i and z/OS

Author: beikov

hibernate-core/src/main/java/org/hibernate/dialect/DB2iDialect.java

@@ -156,13 +156,9 @@ protected <T extends JdbcOperation> SqlAstTranslator<T> buildTranslator(
 		};
 	}
 
-	// I speculate that this is a correct implementation of rowids for DB2 for i,
-	// just on the basis of the DB2 docs, but I currently have no way to test it
-	// Note that the implementation inherited from DB2Dialect for LUW will not work!
-
 	@Override
 	public String rowId(String rowId) {
-		return rowId == null || rowId.isEmpty() ? "rowid_" : rowId;
+		return rowId;
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/DB2zDialect.java

@@ -189,13 +189,9 @@ protected <T extends JdbcOperation> SqlAstTranslator<T> buildTranslator(
 		};
 	}
 
-	// I speculate that this is a correct implementation of rowids for DB2 for z/OS,
-	// just on the basis of the DB2 docs. But I currently have no way to test it.
-	// Note that the implementation inherited from DB2Dialect for LUW will not work!
-
 	@Override
 	public String rowId(String rowId) {
-		return rowId == null || rowId.isEmpty() ? "rowid_" : rowId;
+		return rowId;
 	}
 
 	@Override