CreateQuery cast_enums (children 3)
 Identifier cast_enums
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration type (children 1)
    DataType Enum8 (children 1)
     ExpressionList (children 3)
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'session\'
        Literal UInt64_1
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'pageview\'
        Literal UInt64_2
      Function equals (children 1)
       ExpressionList (children 2)
        Literal \'click\'
        Literal UInt64_3
   ColumnDeclaration date (children 1)
    DataType Date
   ColumnDeclaration id (children 1)
    DataType UInt64
 Storage definition (children 1)
  Function MergeTree (children 1)
   ExpressionList (children 3)
    Identifier date
    Function tuple (children 1)
     ExpressionList (children 3)
      Identifier type
      Identifier date
      Identifier id
    Literal UInt64_8192