CreateQuery foo (children 3)
 Identifier foo
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration ts (children 1)
    DataType DateTime
   ColumnDeclaration x (children 1)
    DataType UInt64
 Storage definition (children 3)
  Function MergeTree
  Function toYYYYMMDD (children 1)
   ExpressionList (children 1)
    Identifier ts
  Identifier ts
