CreateQuery empty (children 3)
 Identifier empty
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration key (children 1)
    DataType UInt32
   ColumnDeclaration val (children 1)
    DataType UInt32
   ColumnDeclaration date (children 1)
    DataType Datetime
 Storage definition (children 3)
  Function SummingMergeTree (children 1)
   ExpressionList (children 1)
    Identifier val
  Identifier date
  Identifier key
