~ubuntu-branches/ubuntu/raring/drizzle/raring

/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2010 Sun Microsystems, Inc.

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include <config.h>

#include <plugin/schema_dictionary/dictionary.h>

#include <drizzled/statement/select.h>

using namespace std;

using namespace drizzled;

IndexPartsTool::IndexPartsTool() :

  IndexesTool("INDEX_PARTS")

{

  add_field("TABLE_SCHEMA");

  add_field("TABLE_NAME");

  add_field("INDEX_NAME");

  add_field("COLUMN_NAME");

  add_field("COLUMN_NUMBER", plugin::TableFunction::NUMBER, 0, false);

  add_field("SEQUENCE_IN_INDEX", plugin::TableFunction::NUMBER, 0, false);

  add_field("COMPARE_LENGTH", plugin::TableFunction::NUMBER, 0, true);

  add_field("IS_ORDER_REVERSE", plugin::TableFunction::BOOLEAN, 0, false);

  add_field("IS_USED_IN_PRIMARY", plugin::TableFunction::BOOLEAN, 0, false);

  add_field("IS_UNIQUE", plugin::TableFunction::BOOLEAN, 0, false);

  add_field("IS_NULLABLE", plugin::TableFunction::BOOLEAN, 0, false);

}

IndexPartsTool::Generator::Generator(Field **arg) :

  IndexesTool::Generator(arg),

  index_part_iterator(0),

  is_index_part_primed(false)

{

}

bool IndexPartsTool::Generator::nextIndexPartsCore()

{

  if (is_index_part_primed)

  {

    index_part_iterator++;

  }

  else

  {

    if (not isIndexesPrimed())

      return false;

    index_part_iterator= 0;

    is_index_part_primed= true;

  }

  if (index_part_iterator >= getIndex().index_part_size())

    return false;

  index_part= getIndex().index_part(index_part_iterator);

  return true;

}

bool IndexPartsTool::Generator::nextIndexParts()

{

  while (not nextIndexPartsCore())

  {

    if (not nextIndex())

      return false;

    is_index_part_primed= false;

  }

  return true;

}

bool IndexPartsTool::Generator::populate()

{

  if (not nextIndexParts())

    return false;

  fill();

  return true;

}

void IndexPartsTool::Generator::fill()

{

  const message::Table::Field &field= getTableProto().field(index_part.fieldnr());

  /* TABLE_SCHEMA */

  push(getTableProto().schema());

  /* TABLE_NAME */

  push(getTableProto().name());

  /* INDEX_NAME */

  push(getIndex().name());

  /* COLUMN_NAME */

  push(field.name());

  /* COLUMN_NUMBER */

  push(static_cast<int64_t>(index_part.fieldnr()));

  /* SEQUENCE_IN_INDEX  */

  push(static_cast<int64_t>(index_part_iterator));

  /* COMPARE_LENGTH */

  if ((field.type() == message::Table::Field::VARCHAR or

    field.type() == message::Table::Field::BLOB) and

    (index_part.has_compare_length()) and

    (index_part.compare_length() != field.string_options().length()))

  {

    push(static_cast<int64_t>(index_part.compare_length()));

  }

  else

    push();

  /* IS_ORDER_REVERSE */

  push(index_part.in_reverse_order());

  /* IS_USED_IN_PRIMARY */

  push(getIndex().is_primary());

  /* IS_UNIQUE */

  push(getIndex().is_unique());

  /* IS_NULLABLE */

  push(getIndex().options().null_part_key());

}