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