CreateQuery ordinary_distinct (children 3)
 Identifier ordinary_distinct
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration CounterID (children 1)
    DataType UInt32
   ColumnDeclaration EventDate (children 1)
    DataType Date
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier CounterID
    Identifier EventDate
  Set
