tablespace_id_owner_visitor.h

/* Copyright (c) 2019, 2022, Oracle and/or its affiliates.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   You should have received a copy of the GNU General Public License
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#ifndef DD__TABLESPACE_ID_OWNER_VISITOR_INCLUDED
#define DD__TABLESPACE_ID_OWNER_VISITOR_INCLUDED

#include "sql/dd/types/index.h"            // dd::Index
#include "sql/dd/types/partition.h"        // dd::Partition
#include "sql/dd/types/partition_index.h"  // dd::Partition_index
#include "sql/dd/types/table.h"            // dd::Table

namespace dd {
/**
   Visitor function which invokes its visitor argument on any subobject
   which holds a tablespace, that is, the partition itself, its
   Partition_indexes, its sub-partitions, and Partition_indexes of those.
   Visitation is terminated when the vistor closure returns true.

   @param p partition to visit.

   @param visitor generic closure which can be applied to all
   tablespace holding objects.

   @return value of last visitor invocation.
*/
template <class VISITOR_TYPE>
bool visit_tablespace_id_owners(const Partition &p, VISITOR_TYPE &&visitor) {
  if (visitor(p)) {
    return true;
  }

  // Visit indexes for top-level partition
  for (const Partition_index *pi : p.indexes()) {
    if (visitor(*pi)) {
      return true;
    }
  }

  // Visit subpartitions, if any
  for (const Partition *sp : p.subpartitions()) {
    if (visitor(*sp)) {
      return true;
    }
    // Visit indexes for subpartition
    for (const Partition_index *spi : sp->indexes()) {
      if (visitor(*spi)) {
        return true;
      }
    }
  }
  return false;
}

/**
   Visitor function which invokes its visitor argument on any subobject
   which holds a tablespace, that is, the table itself, its m_indexes,
   its m_partitions, and m_indexes (Partition_index) of each
   partition and sub-partition. Visitation is terminated when the vistor closure
   returns true.

   @param t table to visit.

   @param visitor generic closure which can be applied to all
   tablespace holding objects.

   @return value of last visitor invocation.
*/
template <class VISITOR_TYPE>
bool visit_tablespace_id_owners(const Table &t, VISITOR_TYPE &&visitor) {
  if (visitor(t)) {
    return true;
  }
  for (const Index *i : t.indexes()) {
    if (visitor(*i)) {
      return true;
    }
  }
  for (const Partition *p : t.partitions()) {
    if (visit_tablespace_id_owners(*p, std::forward<VISITOR_TYPE>(visitor))) {
      return true;
    }
  }
  return false;
}
}  // namespace dd

#endif