CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration t (children 1)
    DataType UInt8
   ColumnDeclaration flag (children 1)
    DataType UInt8
   ColumnDeclaration id (children 1)
    DataType UInt8
 Storage definition (children 4)
  Function MergeTree
  Identifier t
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier t
    Identifier id
  Set
