CreateQuery source_partitioned (children 3)
 Identifier source_partitioned
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration date (children 1)
    DataType Date
   ColumnDeclaration id (children 1)
    DataType UInt32
   ColumnDeclaration value (children 1)
    DataType String
 Storage definition (children 3)
  Function MergeTree
  Function toYYYYMM (children 1)
   ExpressionList (children 1)
    Identifier date
  Identifier id
