MySQL  8.0.27
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, 2021, 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 insert_last_record, bool ignore_last_dup,
66  bool *is_duplicate);
67 void close_tmp_table(TABLE *table);
68 void free_tmp_table(TABLE *table);
69 TABLE *create_duplicate_weedout_tmp_table(THD *thd, uint uniq_tuple_length_arg,
70  SJ_TMP_TABLE *sjtbl);
71 bool setup_tmp_table_handler(THD *thd, TABLE *table, ulonglong select_options,
72  bool force_disk_table = false,
73  bool schema_table = false);
74 bool instantiate_tmp_table(THD *thd, TABLE *table);
75 Field *create_tmp_field(THD *thd, TABLE *table, Item *item, Item::Type type,
76  Func_ptr_array *copy_func, Field **from_field,
77  Field **default_field, bool group, bool modify_item,
78  bool table_cant_handle_bit_fields,
79  bool make_copy_field);
80 Field *create_tmp_field_from_field(THD *thd, const Field *org_field,
81  const char *name, TABLE *table,
82  Item_field *item);
83 
84 /**
85  Get the minimum of max_key_length and max_key_part_length between
86  HEAP engine and internal_tmp_disk_storage_engine.
87 */
88 void get_max_key_and_part_length(uint *max_key_length,
89  uint *max_key_part_length,
90  uint *max_key_parts);
92 void encode_innodb_position(uchar *rowid_bytes, uint length, ha_rows row_num);
93 bool reposition_innodb_cursor(TABLE *table, ha_rows row_num);
94 #endif /* SQL_TMP_TABLE_INCLUDED */
Create_field is a description a field/column that may or may not exists in a table.
Definition: create_field.h:50
Definition: field.h:590
Definition: item.h:4027
Base class that is used to represent any kind of expression in a relational query.
Definition: item.h:802
Type
Definition: item.h:838
Definition: sql_list.h:431
A typesafe replacement for DYNAMIC_ARRAY.
Definition: mem_root_array.h:418
Definition: sql_executor.h:101
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_class.h:821
Object containing parameters used when creating and using temporary tables.
Definition: temp_table_param.h:98
This file includes constants used by all storage engines.
my_off_t ha_rows
Definition: my_base.h:1138
Some integer typedefs for easier portability.
unsigned long long int ulonglong
Definition: my_inttypes.h:55
unsigned char uchar
Definition: my_inttypes.h:51
Log error(cerr, "ERROR")
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
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
required string type
Definition: replication_group_member_actions.proto:33
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:1632
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's SE.
Definition: sql_tmp_table.cc:2038
void free_tmp_table(TABLE *table)
Free temporary table.
Definition: sql_tmp_table.cc:2418
enum_internal_tmp_mem_storage_engine
Definition: sql_tmp_table.h:49
@ TMP_TABLE_TEMPTABLE
Definition: sql_tmp_table.h:51
@ TMP_TABLE_MEMORY
Definition: sql_tmp_table.h:50
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:186
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:864
void close_tmp_table(TABLE *table)
Close a temporary table at end of preparation or execution.
Definition: sql_tmp_table.cc:2369
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:1853
bool reposition_innodb_cursor(TABLE *table, ha_rows row_num)
Helper function for create_ondisk_from_heap().
Definition: sql_tmp_table.cc:2866
void encode_innodb_position(uchar *rowid_bytes, uint length, ha_rows row_num)
bool open_tmp_table(TABLE *table)
Definition: sql_tmp_table.cc:2163
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:622
bool create_ondisk_from_heap(THD *thd, TABLE *table, int error, bool insert_last_record, 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:2515
void init_cache_tmp_engine_properties()
Initialize the storage engine properties for the alternative temporary table storage engines.
Definition: sql_tmp_table.cc:604
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)
Create field for temporary table.
Definition: sql_tmp_table.cc:352
bool instantiate_tmp_table(THD *thd, TABLE *table)
Instantiates temporary table.
Definition: sql_tmp_table.cc:2299
case opt name
Definition: sslopt-case.h:32
Definition: table.h:279
Definition: table.h:1394
unsigned int uint
Definition: uca-dump.cc:29