CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration a (children 1)
    DataType UInt64
   ColumnDeclaration m (children 1)
    DataType UInt64
   ColumnDeclaration d (children 1)
    DataType DateTime
 Storage definition (children 4)
  Function MergeTree
  Function toYYYYMM (children 1)
   ExpressionList (children 1)
    Identifier d
  Function tuple (children 1)
   ExpressionList (children 3)
    Identifier a
    Identifier m
    Identifier d
  Set
