rowid_capable_row_iterator.h

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#ifndef SQL_RANGE_OPTIMIZER_ROWID_CAPABLE_ROW_ITERATOR_H_
#define SQL_RANGE_OPTIMIZER_ROWID_CAPABLE_ROW_ITERATOR_H_
 
#include "my_inttypes.h"
#include "sql/iterators/row_iterator.h"
 
/**
  An interface for RowIterators that have a given row ID, ie.,
  they can be children in ROR (rowid-ordered) scans. The only
  examples of this are QUICK_RANGE_SCAN_SELECT and RowIDIntersectionIterator
  (which itself can also be a parent).
 */
class RowIDCapableRowIterator : public TableRowIterator {
 public:
  RowIDCapableRowIterator(THD *thd, TABLE *table)
      : TableRowIterator(thd, table) {}
 
  /*
    Row ID of last row retrieved by this quick select. This is used only when
    doing ROR-index_merge selects. Updated on successful Read().
  */
  virtual uchar *last_rowid() const = 0;
};
 
#endif  // SQL_RANGE_OPTIMIZER_ROWID_CAPABLE_ROW_ITERATOR_H_