1
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
4
* Copyright (C) 2008 Sun Microsystems, Inc.
6
* This program is free software; you can redistribute it and/or modify
7
* it under the terms of the GNU General Public License as published by
8
* the Free Software Foundation; version 2 of the License.
10
* This program is distributed in the hope that it will be useful,
11
* but WITHOUT ANY WARRANTY; without even the implied warranty of
12
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
* GNU General Public License for more details.
15
* You should have received a copy of the GNU General Public License
16
* along with this program; if not, write to the Free Software
17
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20
#ifndef DRIZZLED_JOIN_CACHE_H
21
#define DRIZZLED_JOIN_CACHE_H
27
typedef JoinTable JoinTable;
30
CacheField and JoinCache is used on full join to cache records in outer
35
Where source data is located (i.e. this points to somewhere in
36
tableX->getInsertRecord())
40
uint32_t length; /* Length of data at *str, in bytes */
41
uint32_t blob_length; /* Valid IFF blob_field != 0 */
42
Field_blob *blob_field;
43
bool strip; /* true <=> Strip endspaces ?? */
44
Table *get_rowid; /* _ != NULL <=> */
61
unsigned char *pos; /* Start of free space in the buffer */
63
uint32_t records; /* # of row cominations currently stored in the cache */
67
Number of fields (i.e. cache_field objects). Those correspond to table
68
columns, and there are also special fields for
69
- table's column null bits
70
- table's null-complementation byte
71
- [new] table's rowid.
77
CacheField **blob_ptr;
78
optimizer::SqlSelect *select;
95
void reset_cache_read();
96
void reset_cache_write();
97
bool store_record_in_cache();
100
int join_init_cache(Session *session, JoinTable *tables, uint32_t table_count);
102
} /* namespace drizzled */
104
#endif /* DRIZZLED_JOIN_CACHE_H */