SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function arrayDistinct (children 1)
     ExpressionList (children 1)
      Function groupArray (children 1)
       ExpressionList (children 1)
        Function if (children 1)
         ExpressionList (children 3)
          Function greaterOrEquals (children 1)
           ExpressionList (children 2)
            Identifier read_bytes
            Identifier peak_memory_usage
          Literal Array_[UInt64_1]
          Function array (children 1)
           ExpressionList (children 2)
            Identifier read_bytes
            Identifier peak_memory_usage
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.part_log
   Function and (children 1)
    ExpressionList (children 3)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier event_type
       Literal \'MutatePart\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier table
       Literal \'table_with_function_pk\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier database
       Function currentDatabase (children 1)
        ExpressionList
