CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration d (children 1)
    DataType Date
   ColumnDeclaration k (children 1)
    DataType Int64
   ColumnDeclaration s (children 1)
    DataType String
 Storage definition (children 3)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList (children 2)
    Function toYYYYMM (children 1)
     ExpressionList (children 1)
      Identifier d
    Identifier k
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier d
    Identifier k