SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Function arrayElement (children 1)
     ExpressionList (children 2)
      Literal Array_[Array_[Array_[\'a\'], Array_[\'b\', \'c\']], Array_[Array_[\'d\', \'e\', \'f\'], Array_[\'g\', \'h\', \'i\', \'j\'], Array_[\'k\', \'l\', \'m\', \'n\', \'o\']], Array_[Array_[\'p\', \'q\', \'r\', \'s\', \'t\', \'u\'], Array_[\'v\', \'w\', \'x\', \'y\', \'z\', \'aa\', \'bb\'], Array_[\'cc\', \'dd\', \'ee\', \'ff\', \'gg\', \'hh\', \'ii\', \'jj\'], Array_[\'kk\', \'ll\', \'mm\', \'nn\', \'oo\', \'pp\', \'qq\', \'rr\', \'ss\']]] (alias arr)
      Identifier number
    Function arrayElement (children 1)
     ExpressionList (children 2)
      Function arrayElement (children 1)
       ExpressionList (children 2)
        Identifier arr
        Identifier number
      Identifier number
    Function arrayElement (children 1)
     ExpressionList (children 2)
      Function arrayElement (children 1)
       ExpressionList (children 2)
        Function arrayElement (children 1)
         ExpressionList (children 2)
          Identifier arr
          Identifier number
        Identifier number
      Identifier number
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Literal UInt64_10