CreateQuery x (children 3)
 Identifier x
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration CounterID (children 1)
    DataType UInt32
   ColumnDeclaration EventDate (children 1)
    DataType Date
   ColumnDeclaration UserID (children 1)
    DataType UInt64
 Storage definition (children 2)
  Function MergeTree
  Identifier CounterID
