diff --git a/obdalib-core/src/main/java/it/unibz/krdb/obda/utils/JdbcTypeMapper.java b/obdalib-core/src/main/java/it/unibz/krdb/obda/utils/JdbcTypeMapper.java
index <HASH>..<HASH> 100644
--- a/obdalib-core/src/main/java/it/unibz/krdb/obda/utils/JdbcTypeMapper.java
+++ b/obdalib-core/src/main/java/it/unibz/krdb/obda/utils/JdbcTypeMapper.java
@@ -54,7 +54,7 @@ public class JdbcTypeMapper {
 		sqlToQuest.put(Types.REAL, COL_TYPE.DOUBLE);
 		sqlToQuest.put(Types.DATE, COL_TYPE.DATE);
 		sqlToQuest.put(Types.TIME, COL_TYPE.TIME);
-		//sqlToQuest.put(Types.TIMESTAMP, COL_TYPE.DATETIME);
+		sqlToQuest.put(Types.TIMESTAMP, COL_TYPE.DATETIME); //GX: needs check
 		sqlToQuest.put(Types.BOOLEAN, COL_TYPE.BOOLEAN);
 		sqlToQuest.put(Types.BIT, COL_TYPE.BOOLEAN);
 //		typeMapper.put(Types.BINARY, dfac.getDataTypePredicateBinary());
reverts the change in JdbcTypeMapper