Fix bug. Date value was null when retrieved from a json expanded array.

modified:   storage/connect/tabjson.cpp

Assume timestamp is in milliseconds when it is a big integer
that is multiple of 1000.
  modified:   storage/connect/value.cpp

storage/connect/tabjson.cpp

@@ -1171,7 +1171,8 @@ void JSONCOL::SetJsonValue(PGLOBAL g, PVAL vp, PJVAL val, int n)
       case TYPE_INTG:
 			case TYPE_BINT:
 			case TYPE_DBL:
-        vp->SetValue_pval(val->GetValue());
+			case TYPE_DATE:
+				vp->SetValue_pval(val->GetValue());
         break;
       case TYPE_BOOL:
         if (vp->IsTypeNum())

storage/connect/value.cpp

@@ -2707,7 +2707,11 @@ bool DTVAL::SetValue_pval(PVAL valp, bool chktype)
 
         ndv = ExtractDate(valp->GetCharValue(), Pdtp, DefYear, dval);
         MakeDate(NULL, dval, ndv);
-      } else
+			} else if (valp->GetType() == TYPE_BIGINT &&
+				       !(valp->GetBigintValue() % 1000)) {
+				// Assuming that this timestamp is in milliseconds
+				Tval = valp->GetBigintValue() / 1000;
+			}	else
         Tval = valp->GetIntValue();
 
     } else