CreateQuery t (children 3)
 Identifier t
 Columns definition (children 2)
  ExpressionList (children 3)
   ColumnDeclaration i (children 1)
    DataType Int
   ColumnDeclaration a (children 1)
    DataType Int
   ColumnDeclaration s (children 1)
    DataType String
  ExpressionList (children 1)
   Index (children 2)
    Identifier s
    Function set (children 1)
     ExpressionList (children 1)
      Literal UInt64_1
 Storage definition (children 2)
  Function MergeTree
  Identifier i