diff --git a/main/plugins/org.talend.designer.core/src/main/java/org/talend/designer/core/model/metadata/MetadataEmfFactory.java b/main/plugins/org.talend.designer.core/src/main/java/org/talend/designer/core/model/metadata/MetadataEmfFactory.java

 index a5f97fd..8e7cb2f 100644

 --- a/main/plugins/org.talend.designer.core/src/main/java/org/talend/designer/core/model/metadata/MetadataEmfFactory.java

 +++ b/main/plugins/org.talend.designer.core/src/main/java/org/talend/designer/core/model/metadata/MetadataEmfFactory.java

 @@ -73,9 +73,9 @@ public class MetadataEmfFactory {

                  colType.setComment(metaCol.getComment());

                  colType.setKey(metaCol.isKey());

                  colType.setNullable(metaCol.isNullable());

 -                if (metaCol.getLength() == null) {

 -                    // colType.setLength(-1);

 -                    colType.unsetLength();

 +                if (metaCol.getLength() == null || metaCol.getLength().intValue() < 0) {

 +                    colType.setLength(-1);

 +                    // colType.unsetLength();

                  } else {

                      colType.setLength(metaCol.getLength());

                  }

 @@ -90,9 +90,9 @@ public class MetadataEmfFactory {

                  }

                  colType.setName(metaCol.getLabel());

 -                if (metaCol.getPrecision() == null) {

 -                    // colType.setPrecision(-1);

 -                    colType.unsetPrecision();

 +                if (metaCol.getPrecision() == null || metaCol.getPrecision().intValue() < 0) {

 +                    colType.setPrecision(-1);

 +                    // colType.unsetPrecision();

                  } else {

                      colType.setPrecision(metaCol.getPrecision());

                  }

 @@ -144,12 +144,8 @@ public class MetadataEmfFactory {

              metaCol.setComment(colType.getComment());

              metaCol.setKey(colType.isKey());

              metaCol.setNullable(colType.isNullable());

 -            if (colType.isSetLength()) {

 -                if (colType.getLength() >= 0) {

 -                    metaCol.setLength(new Integer(colType.getLength()));

 -                } else {

 -                    metaCol.setLength(null);

 -                }

 +            if (colType.getLength() >= 0) {

 +                metaCol.setLength(new Integer(colType.getLength()));

              } else {

                  metaCol.setLength(null);

              }

 @@ -168,12 +164,8 @@ public class MetadataEmfFactory {

                  }

              }

              metaCol.setLabel(colType.getName());

 -            if (colType.isSetPrecision()) {

 -                if (colType.getPrecision() >= 0) {

 -                    metaCol.setPrecision(new Integer(colType.getPrecision()));

 -                } else {

 -                    metaCol.setPrecision(null);

 -                }

 +            if (colType.getPrecision() >= 0) {

 +                metaCol.setPrecision(new Integer(colType.getPrecision()));

              } else {

                  metaCol.setPrecision(null);

              }