CreateQuery test_1602 tbl (children 4)
 Identifier test_1602
 Identifier tbl
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration EventDate (children 1)
    DataType DateTime
   ColumnDeclaration CounterID (children 1)
    DataType UInt32
   ColumnDeclaration UserID (children 1)
    DataType UInt32
 Storage definition (children 4)
  Function MergeTree (children 1)
   ExpressionList
  Function toYYYYMM (children 1)
   ExpressionList (children 1)
    Identifier EventDate
  Function tuple (children 1)
   ExpressionList (children 3)
    Identifier CounterID
    Identifier EventDate
    Function intHash32 (children 1)
     ExpressionList (children 1)
      Identifier UserID
  Set