CreateQuery url_na_log (children 3)
 Identifier url_na_log
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration SiteId (children 1)
    DataType UInt32
   ColumnDeclaration DateVisit (children 1)
    DataType Date
 Storage definition (children 4)
  Function MergeTree
  Identifier SiteId
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier SiteId
    Identifier DateVisit
  Set
