SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 8)
    Identifier k
    Identifier v1
    Identifier v2
    Identifier v3
    Identifier v4
    Identifier v5
    Identifier v6
    Identifier v7
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_coalesce
