SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Literal UInt64_1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab
   Function notEquals (children 1)
    ExpressionList (children 2)
     Function snowflakeToDateTime (children 1)
      ExpressionList (children 2)
       Function CAST (children 1)
        ExpressionList (children 2)
         Literal \'42\'
         Literal \'Int64\'
       Identifier tz
     Function now (children 1)
      ExpressionList
   Set