SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function multiSearchFirstIndex (children 1)
     ExpressionList (children 2)
      Function toLowCardinality (children 1)
       ExpressionList (children 1)
        Literal \'\'
      Function array (children 1)
       ExpressionList (children 1)
        Function toLowCardinality (children 1)
         ExpressionList (children 1)
          Literal \'\'
