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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 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
*/
#pragma once
#include <drizzled/cursor.h>
#include <plugin/function_engine/function.h>
#include <drizzled/base.h>
class FunctionCursor: public drizzled::Cursor
{
drizzled::plugin::TableFunction *tool;
drizzled::plugin::TableFunction::Generator *generator;
size_t row_cache_position;
std::vector<unsigned char> row_cache;
drizzled::ha_rows estimate_of_rows;
drizzled::ha_rows rows_returned;
void wipeCache();
std::vector <unsigned char> record_buffer; // for pack_row
uint32_t max_row_length();
unsigned int pack_row(const unsigned char *record);
public:
FunctionCursor(drizzled::plugin::StorageEngine &engine,
drizzled::Table &table_arg);
~FunctionCursor() {}
int open(const char *name, int mode, uint32_t test_if_locked);
int close(void);
int reset()
{
return extra(drizzled::HA_EXTRA_RESET_STATE);
}
int doStartTableScan(bool scan);
/* get the next row and copy it into buf */
int rnd_next(unsigned char *buf);
/* locate row pointed to by pos, copy it into buf */
int rnd_pos(unsigned char *buf, unsigned char *pos);
int doEndTableScan();
int extra(enum drizzled::ha_extra_function);
/* record position of a record for reordering */
void position(const unsigned char *record);
int info(uint32_t flag);
/**
* @return an upper bound estimate for the number of rows in the table
*/
drizzled::ha_rows estimate_rows_upper_bound()
{
return estimate_of_rows;
}
void get_auto_increment(uint64_t, uint64_t,
uint64_t,
uint64_t *,
uint64_t *)
{}
};
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