diff --git a/pglab/crud/CrudModel.cpp b/pglab/crud/CrudModel.cpp
index bf3016a..d688bd6 100644
--- a/pglab/crud/CrudModel.cpp
+++ b/pglab/crud/CrudModel.cpp
@@ -525,7 +525,8 @@ void CrudModel::initializeColumnList()
 {
     columnList.clear();
     columnList.reserve(m_roData->cols());
-    auto columns = m_database->catalog()->attributes()->getColumnsForRelation(m_table->oid());
+    auto atts = m_database->catalog()->attributes();
+    auto columns = atts->getColumnsForRelation(m_table->oid());
     for (int col = 0; col < m_roData->cols(); ++col)
     {
         int attnum = m_roData->ftableCol(col);
diff --git a/pglab/crud/CrudModel.h b/pglab/crud/CrudModel.h
index 979580c..5a6beb3 100644
--- a/pglab/crud/CrudModel.h
+++ b/pglab/crud/CrudModel.h
@@ -211,6 +211,13 @@ private:
 	bool callLoadData = false;
 
 	std::shared_ptr<Pgsql::Result> m_roData;
+
+    struct ColumnData
+    {
+        std::string name;
+        // identity allways or generated
+    };
+
     std::vector<PgAttribute> columnList; // list of columnMeta 1 to 1 with columns in m_roData.
 
 	PendingRowList m_pendingRowList;
diff --git a/pglablib/catalog/PgConstraint.cpp b/pglablib/catalog/PgConstraint.cpp
index 83ad036..dd2d5ce 100644
--- a/pglablib/catalog/PgConstraint.cpp
+++ b/pglablib/catalog/PgConstraint.cpp
@@ -24,6 +24,12 @@ void operator<<(ConstraintType &s, const Pgsql::Value &v)
 	case 'x':
 		s = ConstraintType::ExclusionConstraint;
 		break;
+    case 'n':
+        s = ConstraintType::NotNull;
+        break;
+    default:
+        s = ConstraintType::Unknown;
+        break;
 	}
 }
 
@@ -49,7 +55,10 @@ QString ShortNameForConstraintType(ConstraintType ct)
 	case ConstraintType::ExclusionConstraint:
 		s = "XC";
 		break;
-	default:
+    case ConstraintType::NotNull:
+        s = "NN";
+        break;
+    default:
 		s = "?";
 		break;
 	}
@@ -78,6 +87,9 @@ QString LongNameForConstraintType(ConstraintType ct)
 	case ConstraintType::ExclusionConstraint:
 		s = "exclusion constraint";
 		break;
+    case ConstraintType::NotNull:
+        s = "not null";
+        break;
 	default:
 		s = "?";
 		break;
diff --git a/pglablib/catalog/PgConstraint.h b/pglablib/catalog/PgConstraint.h
index ae8feac..56f64c8 100644
--- a/pglablib/catalog/PgConstraint.h
+++ b/pglablib/catalog/PgConstraint.h
@@ -11,12 +11,14 @@
 #include <vector>
 
 enum class ConstraintType {
+    Unknown, // not recognized, new???
 	PrimaryKey, // p
 	ForeignKey, // f
 	Unique, // u
 	Check,  // c
 	ConstraintTrigger, // t
 	ExclusionConstraint, // x
+    NotNull, // n
 };
 
 void operator<<(ConstraintType &s, const Pgsql::Value &v);