CreateQuery alter_enum_array (children 3)
 Identifier alter_enum_array
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration Key (children 1)
    DataType UInt64
   ColumnDeclaration Value (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Enum8 (children 1)
       ExpressionList (children 2)
        Function equals (children 1)
         ExpressionList (children 2)
          Literal \'Option1\'
          Literal UInt64_1
        Function equals (children 1)
         ExpressionList (children 2)
          Literal \'Option2\'
          Literal UInt64_2
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList
