CreateQuery xp (children 3)
 Identifier xp
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration A (children 1)
    DataType Date
   ColumnDeclaration B (children 1)
    DataType Int64
   ColumnDeclaration S (children 1)
    DataType String
 Storage definition (children 3)
  Function MergeTree
  Function toYYYYMM (children 1)
   ExpressionList (children 1)
    Identifier A
  Identifier B