SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Identifier ta.id (alias id)
    Identifier ta.properties (alias properties)
    Function arrayUnion (alias propertiesUnion) (children 1)
     ExpressionList (children 1)
      Identifier ta.properties
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_array_union (alias ta)