SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 6)
    Identifier format
    Identifier format_value
    Identifier c1
    Identifier c2
    Identifier c3
    Identifier c4
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function format (children 1)
       ExpressionList (children 2)
        Literal \'CSV\' (alias format)
        Literal \'1,2,"[1,2,3]","[[\\\'abc\\\'], [], [\\\'d\\\', \\\'e\\\']]"\' (alias format_value)