MySQL  8.0.22
Source Code Documentation
sql_tmp_table.h
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1 #ifndef SQL_TMP_TABLE_INCLUDED
2 #define SQL_TMP_TABLE_INCLUDED
3 
4 /* Copyright (c) 2000, 2020, Oracle and/or its affiliates.
5 
6  This program is free software; you can redistribute it and/or modify
7  it under the terms of the GNU General Public License, version 2.0,
8  as published by the Free Software Foundation.
9 
10  This program is also distributed with certain software (including
11  but not limited to OpenSSL) that is licensed under separate terms,
12  as designated in a particular file or component or in included license
13  documentation. The authors of MySQL hereby grant you an additional
14  permission to link the program and your derivative works with the
15  separately licensed software that they have included with MySQL.
16 
17  This program is distributed in the hope that it will be useful,
18  but WITHOUT ANY WARRANTY; without even the implied warranty of
19  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20  GNU General Public License, version 2.0, for more details.
21 
22  You should have received a copy of the GNU General Public License
23  along with this program; if not, write to the Free Software
24  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
25 
26 /**
27  @file
28 
29  @brief
30  Temporary table handling functions.
31 */
32 
33 #include <sys/types.h>
34 
35 #include "my_base.h" // ha_rows
36 #include "my_inttypes.h"
37 #include "sql/item.h" // Item
38 #include "sql/temp_table_param.h"
39 
40 class Create_field;
41 class Field;
42 class SJ_TMP_TABLE;
43 class THD;
44 struct ORDER;
45 struct TABLE;
46 template <class T>
47 class List;
48 
52 };
53 
55  const mem_root_deque<Item *> &fields, ORDER *group,
56  bool distinct, bool save_sum_fields,
57  ulonglong select_options, ha_rows rows_limit,
58  const char *table_alias);
59 bool open_tmp_table(TABLE *table);
61  bool is_virtual = true,
62  ulonglong select_options = 0,
63  const char *alias = nullptr);
64 bool create_ondisk_from_heap(THD *thd, TABLE *table, int error,
65  bool ignore_last_dup, bool *is_duplicate);
66 void close_tmp_table(THD *thd, TABLE *entry);
68 TABLE *create_duplicate_weedout_tmp_table(THD *thd, uint uniq_tuple_length_arg,
69  SJ_TMP_TABLE *sjtbl);
70 bool setup_tmp_table_handler(THD *thd, TABLE *table, ulonglong select_options,
71  bool force_disk_table = false,
72  bool schema_table = false);
73 bool instantiate_tmp_table(THD *thd, TABLE *table);
74 Field *create_tmp_field(THD *thd, TABLE *table, Item *item, Item::Type type,
75  Func_ptr_array *copy_func, Field **from_field,
76  Field **default_field, bool group, bool modify_item,
77  bool table_cant_handle_bit_fields, bool make_copy_field,
78  bool copy_result_field = false);
79 Field *create_tmp_field_from_field(THD *thd, const Field *org_field,
80  const char *name, TABLE *table,
81  Item_field *item);
82 
83 /**
84  Get the minimum of max_key_length and max_key_part_length between
85  HEAP engine and internal_tmp_disk_storage_engine.
86 */
87 void get_max_key_and_part_length(uint *max_key_length,
88  uint *max_key_part_length,
89  uint *max_key_parts);
91 void encode_innodb_position(uchar *rowid_bytes, uint length, ha_rows row_num);
92 bool reposition_innodb_cursor(TABLE *table, ha_rows row_num);
93 #endif /* SQL_TMP_TABLE_INCLUDED */
Definition: item.h:3908
unsigned long long int ulonglong
Definition: my_inttypes.h:55
TABLE * create_tmp_table_from_fields(THD *thd, List< Create_field > &field_list, bool is_virtual=true, ulonglong select_options=0, const char *alias=nullptr)
Create an, optionally reduced, TABLE object with properly set up Field list from a list of field defi...
Definition: sql_tmp_table.cc:1876
unsigned char uchar
Definition: my_inttypes.h:51
Definition: sql_tmp_table.h:51
Definition: table.h:272
Some integer typedefs for easier portability.
Field * create_tmp_field_from_field(THD *thd, const Field *org_field, const char *name, TABLE *table, Item_field *item)
Lifecycle management of internal temporary tables.
Definition: sql_tmp_table.cc:176
A (partial) implementation of std::deque allocating its blocks on a MEM_ROOT.
Definition: mem_root_deque.h:109
void init_cache_tmp_engine_properties()
Initialize the storage engine properties for the alternative temporary table storage engines...
Definition: sql_tmp_table.cc:608
Definition: field.h:723
TABLE * create_tmp_table(THD *thd, Temp_table_param *param, const mem_root_deque< Item *> &fields, ORDER *group, bool distinct, bool save_sum_fields, ulonglong select_options, ha_rows rows_limit, const char *table_alias)
Definition: sql_tmp_table.cc:887
Definition: table.h:1363
bool is_duplicate(Country_record *record, int skip_index)
Check for duplicate value of Primary/Unique Key column(s).
Definition: pfs_example_country.cc:50
This file includes constants used by all storage engines.
void encode_innodb_position(uchar *rowid_bytes, uint length, ha_rows row_num)
Encode an InnoDB PK in 6 bytes, high-byte first; like InnoDB&#39;s dict_sys_write_row_id() does...
Definition: sql_tmp_table.cc:2840
bool instantiate_tmp_table(THD *thd, TABLE *table)
Instantiates temporary table.
Definition: sql_tmp_table.cc:2322
Definition: auth_common.h:57
bool reposition_innodb_cursor(TABLE *table, ha_rows row_num)
Helper function for create_ondisk_from_heap().
Definition: sql_tmp_table.cc:2863
bool setup_tmp_table_handler(THD *thd, TABLE *table, ulonglong select_options, bool force_disk_table=false, bool schema_table=false)
Helper function to create_tmp_table_* family for setting up table&#39;s SE.
Definition: sql_tmp_table.cc:2061
Definition: item.h:775
unsigned int uint
Definition: uca-dump.cc:29
case opt name
Definition: sslopt-case.h:32
Type
Definition: item.h:811
void get_max_key_and_part_length(uint *max_key_length, uint *max_key_part_length, uint *max_key_parts)
Get the minimum of max_key_length and max_key_part_length between HEAP engine and internal_tmp_disk_s...
Definition: sql_tmp_table.cc:626
void free_tmp_table(TABLE *entry)
Free temporary table.
Definition: sql_tmp_table.cc:2435
A typesafe replacement for DYNAMIC_ARRAY.
Definition: mem_root_array.h:416
Create_field is a description a field/column that may or may not exists in a table.
Definition: create_field.h:49
void close_tmp_table(THD *thd, TABLE *entry)
Close a temporary table at end of preparation or execution.
Definition: sql_tmp_table.cc:2388
Definition: sql_executor.h:102
TABLE * create_duplicate_weedout_tmp_table(THD *thd, uint uniq_tuple_length_arg, SJ_TMP_TABLE *sjtbl)
Create a temporary table to weed out duplicate rowid combinations.
Definition: sql_tmp_table.cc:1655
enum_internal_tmp_mem_storage_engine
Definition: sql_tmp_table.h:49
bool create_ondisk_from_heap(THD *thd, TABLE *table, int error, bool ignore_last_dup, bool *is_duplicate)
If a MEMORY table gets full, create a disk-based table and copy all rows to this. ...
Definition: sql_tmp_table.cc:2514
bool open_tmp_table(TABLE *table)
Definition: sql_tmp_table.cc:2183
Definition: completion_hash.h:34
Field * create_tmp_field(THD *thd, TABLE *table, Item *item, Item::Type type, Func_ptr_array *copy_func, Field **from_field, Field **default_field, bool group, bool modify_item, bool table_cant_handle_bit_fields, bool make_copy_field, bool copy_result_field=false)
Create field for temporary table.
Definition: sql_tmp_table.cc:343
bool length(const dd::Spatial_reference_system *srs, const Geometry *g1, double *length, bool *null) noexcept
Computes the length of linestrings and multilinestrings.
Definition: length.cc:75
Definition: sql_tmp_table.h:50
my_off_t ha_rows
Definition: my_base.h:1136
Object containing parameters used when creating and using temporary tables.
Definition: temp_table_param.h:74
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_class.h:803
Log error(cerr, "ERROR")