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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2009 Sun Microsystems
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#ifndef PLUGIN_INFORMATION_ENGINE_INFORMATION_CURSOR_H
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#define PLUGIN_INFORMATION_ENGINE_INFORMATION_CURSOR_H
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#include <drizzled/cursor.h>
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#include <drizzled/thr_lock.h>
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#include <drizzled/plugin/info_schema_table.h>
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#include <plugin/information_engine/information_engine.h>
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class InformationCursor: public drizzled::Cursor
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drizzled::THR_LOCK_DATA lock; /* MySQL lock */
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InformationEngine::Share *share;
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drizzled::plugin::InfoSchemaTable::Rows::iterator iter;
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InformationCursor(drizzled::plugin::StorageEngine &engine,
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drizzled::TableShare &table_arg);
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~InformationCursor() {}
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int open(const char *name, int mode, uint32_t test_if_locked);
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int rnd_init(bool scan);
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/* get the next row and copy it into buf */
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int rnd_next(unsigned char *buf);
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/* locate row pointed to by pos, copy it into buf */
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int rnd_pos(unsigned char *buf, unsigned char *pos);
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/* record position of a record for reordering */
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void position(const unsigned char *record);
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int info(uint32_t flag);
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* @return an upper bound estimate for the number of rows in the table
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drizzled::ha_rows estimate_rows_upper_bound()
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drizzled::plugin::InfoSchemaTable *sch_table= share->getInfoSchemaTable();
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if (! sch_table->getRows().empty())
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/* we multiply by 3 here to ensure enough memory is allocated for sort buffers */
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return (3 * sch_table->getRows().size());
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#endif /* PLUGIN_INFORMATION_ENGINE_INFORMATION_CURSOR_H */