diff --git a/distribution/lib/Standard/Database/0.0.0-dev/src/Data/Table.enso b/distribution/lib/Standard/Database/0.0.0-dev/src/Data/Table.enso
index 1c98224e12124..2c228fef34aa9 100644
--- a/distribution/lib/Standard/Database/0.0.0-dev/src/Data/Table.enso
+++ b/distribution/lib/Standard/Database/0.0.0-dev/src/Data/Table.enso
@@ -1159,12 +1159,22 @@ type Table
                     queries = all_tables.map_with_index i-> t->
                         columns_to_select = good_columns.map description->
                             column_set = description.first
+                            result_type = description.second
                             column_name = column_set.name
                             case column_set.column_indices.at i of
                                 Nothing ->
                                     typ = SQL_Type_Reference.from_constant SQL_Type.null
                                     expr = SQL_Expression.Literal "NULL"
-                                    Internal_Column.Value column_name typ expr
+                                    null_column = Internal_Column.Value column_name typ expr
+                                    if cast_after_union then null_column else
+                                        ## We assume that the type for this
+                                           expression will never be queried - it
+                                           is just used internally to build the
+                                           Union operation and never exposed
+                                           externally.
+                                        infer_return_type _ = SQL_Type_Reference.null
+                                        dialect.make_cast null_column result_type infer_return_type
+
                                 corresponding_column_index : Integer ->
                                     t.at corresponding_column_index . as_internal . rename column_name
                         pairs = columns_to_select.map c->
diff --git a/distribution/lib/Standard/Table/0.0.0-dev/src/Data/Column.enso b/distribution/lib/Standard/Table/0.0.0-dev/src/Data/Column.enso
index f1cf73525b7e0..b24cd47ca8232 100644
--- a/distribution/lib/Standard/Table/0.0.0-dev/src/Data/Column.enso
+++ b/distribution/lib/Standard/Table/0.0.0-dev/src/Data/Column.enso
@@ -19,7 +19,7 @@ import project.Internal.Widget_Helpers
 from project.Data.Table import print_table
 from project.Data.Type.Value_Type import Value_Type, Auto
 from project.Data.Type.Value_Type_Helpers import type_helpers
-from project.Errors import No_Index_Set_Error, Floating_Point_Equality, Invalid_Value_Type
+from project.Errors import No_Index_Set_Error, Floating_Point_Equality, Invalid_Value_Type, Inexact_Type_Coercion
 
 polyglot java import org.enso.table.data.column.operation.map.MapOperationProblemBuilder
 polyglot java import org.enso.table.data.column.storage.Storage as Java_Storage
@@ -647,7 +647,7 @@ type Column
         type_helpers.check_argument_type self Value_Type.expect_boolean <|
             common_type = type_helpers.find_common_type_for_arguments [when_true, when_false]
             storage_type = Storage.from_value_type common_type Problem_Behavior.Report_Error
-            storage_type.catch Inexact_Type_Coercion error->
+            storage_type.catch Inexact_Type_Coercion _->
                 Panic.throw (Illegal_State.Error "Common type "+common_type.to_display_text+" is not supported by the Storage. This should never happen and is a bug in the Table library.")
 
             storage_type.if_not_error <|
diff --git a/distribution/lib/Standard/Table/0.0.0-dev/src/Data/Type/Value_Type_Helpers.enso b/distribution/lib/Standard/Table/0.0.0-dev/src/Data/Type/Value_Type_Helpers.enso
index 95eaa36e76aa2..6e0e70cccf7d9 100644
--- a/distribution/lib/Standard/Table/0.0.0-dev/src/Data/Type/Value_Type_Helpers.enso
+++ b/distribution/lib/Standard/Table/0.0.0-dev/src/Data/Type/Value_Type_Helpers.enso
@@ -4,7 +4,7 @@ import Standard.Base.Errors.Illegal_Argument.Illegal_Argument
 import project.Data.Column.Column
 import project.Data.Type.Enso_Types
 from project.Data.Type.Value_Type import Value_Type, Auto
-from project.Errors import Invalid_Value_Type
+from project.Errors import Invalid_Value_Type, No_Common_Type
 
 ## PRIVATE
    Finds a type that can fit both a current type and a new type.
diff --git a/std-bits/table/src/main/java/org/enso/table/data/column/storage/DoubleStorage.java b/std-bits/table/src/main/java/org/enso/table/data/column/storage/DoubleStorage.java
index a2032453c5a53..abeb15dc7e691 100644
--- a/std-bits/table/src/main/java/org/enso/table/data/column/storage/DoubleStorage.java
+++ b/std-bits/table/src/main/java/org/enso/table/data/column/storage/DoubleStorage.java
@@ -40,7 +40,7 @@ public DoubleStorage(long[] data, int size, BitSet isMissing) {
   public static DoubleStorage makeEmpty(int size) {
     BitSet isMissing = new BitSet(size);
     isMissing.set(0, size);
-    return new DoubleStorage(new long[0], size, new BitSet(size));
+    return new DoubleStorage(new long[0], size, isMissing);
   }
 
   /** @inheritDoc */