MySQL 8.0.29
Source Code Documentation
sp.h
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1/* Copyright (c) 2002, 2022, Oracle and/or its affiliates.
2
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
6
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9 as designated in a particular file or component or in included license
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12 separately licensed software that they have included with MySQL.
13
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15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
22
23#ifndef _SP_H_
24#define _SP_H_
25
26#include <assert.h>
27#include <stddef.h>
28#include <sys/types.h>
29
30#include <string>
31
32#include "field_types.h"
33#include "lex_string.h"
34#include "map_helpers.h"
35#include "my_inttypes.h"
37#include "sql/item.h" // Item::Type
38#include "sql/sp_head.h" // Stored_program_creation_ctx
39#include "sql/sql_lex.h"
40
42class Query_arena;
43class THD;
44struct CHARSET_INFO;
45struct LEX_USER;
46struct MEM_ROOT;
47
48namespace dd {
49class Routine;
50class Schema;
51} // namespace dd
52
53class Field;
55class String;
56class sp_cache;
57struct TABLE;
58struct TABLE_LIST;
59
61template <typename T>
62class SQL_I_List;
63
64enum class enum_sp_type;
65
66/* Tells what SP_DEFAULT_ACCESS should be mapped to */
67#define SP_DEFAULT_ACCESS_MAPPING SP_CONTAINS_SQL
68
69/* Tells what SP_IS_DEFAULT_SUID should be mapped to */
70#define SP_DEFAULT_SUID_MAPPING SP_IS_SUID
71
72/* Max length(LONGBLOB field type length) of stored routine body */
73static const uint MYSQL_STORED_ROUTINE_BODY_LENGTH = 4294967295U;
74
75/* Max length(TEXT field type length) of stored routine comment */
76static const int MYSQL_STORED_ROUTINE_COMMENT_LENGTH = 65535;
77
79 SP_OK = 0,
80
81 // Schema does not exists
83
84 // Routine does not exists
86
87 // Routine already exists
89
90 // Create routine failed
92
93 // Drop routine failed
95
96 // Routine load failed
98
99 // Routine parse failed
101
102 // Internal errors
105
106/*
107 Fields in mysql.proc table in 5.7. This enum is used to read and
108 update mysql.routines dictionary table during upgrade scenario.
109
110 Note: This enum should not be used for other purpose
111 as it will be removed eventually.
112*/
113enum {
136
137/*************************************************************************/
138
139/**
140 Stored_routine_creation_ctx -- creation context of stored routines
141 (stored procedures and functions).
142*/
143
145 public:
147 const dd::Routine *routine);
148
150 const sp_name *name,
151 TABLE *proc_tbl);
152
153 public:
155
156 protected:
157 Object_creation_ctx *create_backup_ctx(THD *thd) const override;
158 void delete_backup_ctx() override;
159
160 private:
163
165 const CHARSET_INFO *connection_cl,
166 const CHARSET_INFO *db_cl)
167 : Stored_program_creation_ctx(client_cs, connection_cl, db_cl) {}
168};
169
170/* Drop all routines in database 'db' */
171bool sp_drop_db_routines(THD *thd, const dd::Schema &schema);
172
173/**
174 Acquires exclusive metadata lock on all stored routines in the
175 given database.
176
177 @param thd Thread handler
178 @param schema Schema object
179
180 @retval false Success
181 @retval true Failure
182 */
183bool lock_db_routines(THD *thd, const dd::Schema &schema);
184
186 sp_cache **cp, bool cache_only);
187
189 sp_cache **cp);
190
192 bool lookup_only, sp_head **sp);
193
195 const sp_name *name, bool lookup_only,
196 sp_head **sp);
197
198bool sp_exist_routines(THD *thd, TABLE_LIST *procs, bool is_proc);
199
201
203 THD *thd, enum_sp_type type, const char *sp_db, size_t sp_db_len,
204 const char *sp_name, size_t sp_name_len, sp_head **sphp,
205 sql_mode_t sql_mode, const char *params, const char *returns,
206 const char *body, st_sp_chistics *chistics, const char *definer_user,
207 const char *definer_host, longlong created, longlong modified,
208 Stored_program_creation_ctx *creation_ctx);
209
210bool sp_create_routine(THD *thd, sp_head *sp, const LEX_USER *definer,
211 bool if_not_exists, bool &sp_already_exists);
212
214 st_sp_chistics *chistics);
215
217
218/**
219 Structure that represents element in the set of stored routines
220 used by statement or routine.
221*/
222
224 public:
225 /**
226 Key identifying routine or other object added to the set.
227
228 Key format: "@<1-byte entry type@>@<db name@>\0@<routine/object name@>\0".
229
230 @note We use binary comparison for these keys as the @<db name@> component
231 requires case-sensitive comparison on --lower-case-table-names=0
232 systems. On systems where --lower-case-table-names > 0 database
233 names which passed to functions working with this set are already
234 lowercased. So binary comparison is equivalent to case-insensitive
235 comparison for them.
236 Routine names are case and accent insensitive. To achieve such
237 comparison we normalize routine names by converting their characters
238 to their sort weights (according to case and accent insensitive
239 collation). In this case, the actual routine name is also stored in
240 the member m_object_name.
241
242 @note For Foreign Key objects, '@<db name@>\0@<object name@>\0' part of the
243 key is compatible with keys used by MDL. So one can easily construct
244 MDL_key from this key.
245 */
246 char *m_key;
250
255 /**
256 Parent table in a foreign key on which child table there was insert
257 or update. We will lookup new values in parent, so need to acquire
258 SR lock on it.
259 */
261 /**
262 Child table in a foreign key with RESTRICT/NO ACTION as corresponding
263 rule and on which parent table there was delete or update.
264 We will check if old parent key is referenced by child table,
265 so need to acquire SR lock on it.
266 */
268 /**
269 Child table in a foreign key with CASCADE/SET NULL/SET DEFAULT as
270 'on update' rule, on which parent there was update, or with SET NULL/
271 SET DEFAULT as 'on delete' rule, on which parent there was delete.
272 We might need to update rows in child table, so we need to acquire
273 SW lock on it. We also need to take into account that child table
274 might be parent for some other FKs, so such update needs
275 to be handled recursively.
276 */
278 /**
279 Child table in a foreign key with CASCADE as 'on delete' rule for
280 which there was delete from the parent table.
281 We might need to delete rows from the child table, so we need to
282 acquire SW lock on it.
283 We also need to take into account that child table might be parent
284 for some other FKs, so such delete needs to be handled recursively
285 (and even might result in updates).
286 */
288 };
289
290 entry_type type() const { return (entry_type)m_key[0]; }
291 const char *db() const { return (char *)m_key + 1; }
292 size_t db_length() const { return m_db_length; }
293 const char *name() const {
295 : (char *)m_key + 1 + m_db_length + 1;
296 }
297 size_t name_length() const {
299 : m_key_length - 1U - m_db_length - 1U - 1U;
300 }
301 bool use_normalized_key() const {
302 return (type() == FUNCTION || type() == PROCEDURE || type() == TRIGGER);
303 }
304
305 const char *part_mdl_key() {
306 assert(!use_normalized_key());
307 return (char *)m_key + 1;
308 }
310 assert(!use_normalized_key());
311 return m_key_length - 1U;
312 }
313
314 /**
315 Next element in list linking all routines in set. See also comments
316 for LEX::sroutine/sroutine_list and sp_head::m_sroutines.
317 */
319 /**
320 Uppermost view which directly or indirectly uses this routine.
321 0 if routine is not used in view. Note that it also can be 0 if
322 statement uses routine both via view and directly.
323 */
325 /**
326 This is for prepared statement validation purposes.
327 A statement looks up and pre-loads all its stored functions
328 at prepare. Later on, if a function is gone from the cache,
329 execute may fail. Similarly, tables involved in referential
330 constraints are also prelocked.
331 Remember the version of the cached item at prepare to be able to
332 invalidate the prepared statement at execute if it
333 changes.
334 */
336};
337
338/*
339 Enum to indicate SP name normalization required when constructing a key
340 in sp_add_used_routine method.
341*/
343 LEAVE_AS_IS = 0, // No normalization needed.
344 LOWERCASE_NAME, // Lower case SP name.
345 UNACCENT_AND_LOWERCASE_NAME, // Lower case SP name and remove accent.
346};
347
348/*
349 Procedures for handling sets of stored routines used by statement or routine.
350*/
351bool sp_add_used_routine(Query_tables_list *prelocking_ctx, Query_arena *arena,
353 size_t db_length, const char *name, size_t name_length,
354 bool lowercase_db,
355 Sp_name_normalize_type name_normalize_type,
356 bool own_routine, TABLE_LIST *belong_to_view);
357
358/**
359 Convenience wrapper around sp_add_used_routine() for most common case -
360 stored procedure or function which are explicitly used by the statement.
361*/
362
363inline bool sp_add_own_used_routine(Query_tables_list *prelocking_ctx,
364 Query_arena *arena,
366 sp_name *sp_name) {
369
370 return sp_add_used_routine(
371 prelocking_ctx, arena, type, sp_name->m_db.str, sp_name->m_db.length,
374}
375
378 THD *thd, Query_tables_list *prelocking_ctx,
380 TABLE_LIST *belong_to_view);
381void sp_update_stmt_used_routines(THD *thd, Query_tables_list *prelocking_ctx,
383 TABLE_LIST *belong_to_view);
384
385const uchar *sp_sroutine_key(const uchar *ptr, size_t *plen);
386
388 const dd::Routine *routine,
389 bool *free_sp_head);
390
391bool load_charset(MEM_ROOT *mem_root, Field *field, const CHARSET_INFO *dflt_cs,
392 const CHARSET_INFO **cs);
393
395 const CHARSET_INFO *dflt_cl, const CHARSET_INFO **cl);
396
397///////////////////////////////////////////////////////////////////////////
398
400
401void sp_finish_parsing(THD *thd);
402
403///////////////////////////////////////////////////////////////////////////
404
408
409bool sp_check_name(LEX_STRING *ident);
410
411TABLE_LIST *sp_add_to_query_tables(THD *thd, LEX *lex, const char *db,
412 const char *name);
413
414Item *sp_prepare_func_item(THD *thd, Item **it_addr);
415
416bool sp_eval_expr(THD *thd, Field *result_field, Item **expr_item_ptr);
417
418String *sp_get_item_value(THD *thd, Item *item, String *str);
419
420///////////////////////////////////////////////////////////////////////////
421
422#endif /* _SP_H_ */
Definition: field.h:573
Base class that is used to represent any kind of expression in a relational query.
Definition: item.h:802
Type
Definition: item.h:838
Object_creation_ctx – interface for creation context of database objects (views, stored routines,...
Definition: table.h:194
Definition: sql_class.h:358
Definition: sql_lex.h:2465
Simple intrusive linked list.
Definition: sql_list.h:45
Structure that represents element in the set of stored routines used by statement or routine.
Definition: sp.h:223
bool use_normalized_key() const
Definition: sp.h:301
entry_type type() const
Definition: sp.h:290
LEX_CSTRING m_object_name
Definition: sp.h:247
Sroutine_hash_entry * next
Next element in list linking all routines in set.
Definition: sp.h:318
int64 m_cache_version
This is for prepared statement validation purposes.
Definition: sp.h:335
uint16 m_db_length
Definition: sp.h:249
const char * name() const
Definition: sp.h:293
const char * db() const
Definition: sp.h:291
size_t part_mdl_key_length()
Definition: sp.h:309
char * m_key
Key identifying routine or other object added to the set.
Definition: sp.h:246
entry_type
Definition: sp.h:251
@ FUNCTION
Definition: sp.h:252
@ FK_TABLE_ROLE_CHILD_UPDATE
Child table in a foreign key with CASCADE/SET NULL/SET DEFAULT as 'on update' rule,...
Definition: sp.h:277
@ FK_TABLE_ROLE_CHILD_DELETE
Child table in a foreign key with CASCADE as 'on delete' rule for which there was delete from the par...
Definition: sp.h:287
@ FK_TABLE_ROLE_PARENT_CHECK
Parent table in a foreign key on which child table there was insert or update.
Definition: sp.h:260
@ TRIGGER
Definition: sp.h:254
@ PROCEDURE
Definition: sp.h:253
@ FK_TABLE_ROLE_CHILD_CHECK
Child table in a foreign key with RESTRICT/NO ACTION as corresponding rule and on which parent table ...
Definition: sp.h:267
const char * part_mdl_key()
Definition: sp.h:305
uint16 m_key_length
Definition: sp.h:248
size_t db_length() const
Definition: sp.h:292
size_t name_length() const
Definition: sp.h:297
TABLE_LIST * belong_to_view
Uppermost view which directly or indirectly uses this routine.
Definition: sp.h:324
Stored_program_creation_ctx – base class for creation context of stored programs (stored routines,...
Definition: sp_head.h:88
Stored_routine_creation_ctx – creation context of stored routines (stored procedures and functions).
Definition: sp.h:144
Object_creation_ctx * create_backup_ctx(THD *thd) const override
Definition: sp.cc:247
static Stored_routine_creation_ctx * load_from_db(THD *thd, const sp_name *name, TABLE *proc_tbl)
Definition: sp.cc:184
static Stored_routine_creation_ctx * create_routine_creation_ctx(const dd::Routine *routine)
Definition: sp.cc:163
Stored_routine_creation_ctx(const CHARSET_INFO *client_cs, const CHARSET_INFO *connection_cl, const CHARSET_INFO *db_cl)
Definition: sp.h:164
Stored_program_creation_ctx * clone(MEM_ROOT *mem_root) override
Definition: sp.cc:241
void delete_backup_ctx() override
Definition: sp.cc:253
Stored_routine_creation_ctx(THD *thd)
Definition: sp.h:161
Using this class is fraught with peril, and you need to be very careful when doing so.
Definition: sql_string.h:166
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_class.h:945
Abstract base class for functions and procedures.
Definition: routine.h:60
Definition: schema.h:62
std::unordered_map, but with my_malloc, so that you can track the memory used using PSI memory keys.
Definition: map_helpers.h:147
Definition: sp_cache.cc:41
sp_head represents one instance of a stored program.
Definition: sp_head.h:379
Definition: sp_head.h:119
LEX_STRING m_name
Definition: sp_head.h:122
LEX_CSTRING m_db
Definition: sp_head.h:121
static MEM_ROOT mem_root
Definition: client_plugin.cc:109
ulonglong sql_mode_t
Definition: dd_event.h:36
This file contains the field type.
enum_field_types
Column types for MySQL.
Definition: field_types.h:57
enum_sp_type
enum_sp_type defines type codes of stored programs.
Definition: sql_lex.h:220
Some integer typedefs for easier portability.
unsigned long long int ulonglong
Definition: my_inttypes.h:55
unsigned char uchar
Definition: my_inttypes.h:51
int64_t int64
Definition: my_inttypes.h:67
long long int longlong
Definition: my_inttypes.h:54
uint16_t uint16
Definition: my_inttypes.h:64
static const char * sql_mode
Definition: mysqlslap.cc:193
std::string str(const mysqlrouter::ConfigGenerator::Options::Endpoint &ep)
Definition: config_generator.cc:1055
Definition: commit_order_queue.h:33
The version of the current data dictionary table definitions.
Definition: dictionary_client.h:42
const char * db_name
Definition: rules_table_service.cc:54
required string type
Definition: replication_group_member_actions.proto:33
Item_result sp_map_result_type(enum enum_field_types type)
Definition: sp.cc:2284
bool sp_check_name(LEX_STRING *ident)
Check that the name 'ident' is ok.
Definition: sp.cc:2496
bool sp_eval_expr(THD *thd, Field *result_field, Item **expr_item_ptr)
Evaluate an expression and store the result in the field.
Definition: sp.cc:2559
bool sp_exist_routines(THD *thd, TABLE_LIST *procs, bool is_proc)
This is used by sql_acl.cc:mysql_routine_grant() and is used to find the routines in 'routines'.
Definition: sp.cc:1652
enum_sp_return_code sp_drop_routine(THD *thd, enum_sp_type type, sp_name *name)
Drops a stored routine.
Definition: sp.cc:926
bool sp_add_used_routine(Query_tables_list *prelocking_ctx, Query_arena *arena, Sroutine_hash_entry::entry_type type, const char *db, size_t db_length, const char *name, size_t name_length, bool lowercase_db, Sp_name_normalize_type name_normalize_type, bool own_routine, TABLE_LIST *belong_to_view)
Add routine or trigger which is used by statement to the set of stored routines used by this statemen...
Definition: sp.cc:1790
ulonglong sql_mode_t
Definition: sp.h:58
TABLE_LIST * sp_add_to_query_tables(THD *thd, LEX *lex, const char *db, const char *name)
sp_head * sp_setup_routine(THD *thd, enum_sp_type type, sp_name *name, sp_cache **cp)
Setup a cached routine for execution.
Definition: sp.cc:1571
void sp_remove_not_own_routines(Query_tables_list *prelocking_ctx)
Remove routines which are only indirectly used by statement from the set of routines used by this sta...
Definition: sp.cc:1884
Sp_name_normalize_type
Definition: sp.h:342
uint sp_get_flags_for_command(LEX *lex)
Definition: sp.cc:2336
bool load_charset(MEM_ROOT *mem_root, Field *field, const CHARSET_INFO *dflt_cs, const CHARSET_INFO **cs)
Definition: sp.cc:118
sp_head * sp_start_parsing(THD *thd, enum_sp_type sp_type, sp_name *sp_name)
Start parsing of a stored program.
Definition: sp.cc:2237
bool sp_show_create_routine(THD *thd, enum_sp_type type, sp_name *name)
Implement SHOW CREATE statement for stored routines.
Definition: sp.cc:1473
bool sp_create_routine(THD *thd, sp_head *sp, const LEX_USER *definer, bool if_not_exists, bool &sp_already_exists)
Creates a stored routine.
Definition: sp.cc:795
sp_head * sp_load_for_information_schema(THD *thd, LEX_CSTRING db_name, const dd::Routine *routine, bool *free_sp_head)
The function loads sp_head struct for information schema purposes (used for I_S ROUTINES & PARAMETERS...
Definition: sp.cc:2151
String * sp_get_item_value(THD *thd, Item *item, String *str)
Return a string representation of the Item value.
Definition: sp.cc:2627
Item * sp_prepare_func_item(THD *thd, Item **it_addr)
Prepare an Item for evaluation (call of fix_fields).
Definition: sp.cc:2525
bool lock_db_routines(THD *thd, const dd::Schema &schema)
Acquires exclusive metadata lock on all stored routines in the given database.
Definition: sp.cc:1179
Item::Type sp_map_item_type(enum enum_field_types type)
Definition: sp.cc:2306
@ MYSQL_PROC_FIELD_PARAM_LIST
Definition: sp.h:122
@ MYSQL_PROC_FIELD_DETERMINISTIC
Definition: sp.h:120
@ MYSQL_PROC_FIELD_CHARACTER_SET_CLIENT
Definition: sp.h:130
@ MYSQL_PROC_FIELD_RETURNS
Definition: sp.h:123
@ MYSQL_PROC_FIELD_SECURITY_TYPE
Definition: sp.h:121
@ MYSQL_PROC_FIELD_NAME
Definition: sp.h:115
@ MYSQL_PROC_FIELD_COUNT
Definition: sp.h:134
@ MYSQL_PROC_FIELD_LANGUAGE
Definition: sp.h:118
@ MYSQL_PROC_MYSQL_TYPE
Definition: sp.h:116
@ MYSQL_PROC_FIELD_SPECIFIC_NAME
Definition: sp.h:117
@ MYSQL_PROC_FIELD_COMMENT
Definition: sp.h:129
@ MYSQL_PROC_FIELD_SQL_MODE
Definition: sp.h:128
@ MYSQL_PROC_FIELD_DB_COLLATION
Definition: sp.h:132
@ MYSQL_PROC_FIELD_BODY
Definition: sp.h:124
@ MYSQL_PROC_FIELD_CREATED
Definition: sp.h:126
@ MYSQL_PROC_FIELD_ACCESS
Definition: sp.h:119
@ MYSQL_PROC_FIELD_COLLATION_CONNECTION
Definition: sp.h:131
@ MYSQL_PROC_FIELD_DB
Definition: sp.h:114
@ MYSQL_PROC_FIELD_MODIFIED
Definition: sp.h:127
@ MYSQL_PROC_FIELD_BODY_UTF8
Definition: sp.h:133
@ MYSQL_PROC_FIELD_DEFINER
Definition: sp.h:125
enum_sp_return_code
Definition: sp.h:78
@ SP_ALREADY_EXISTS
Definition: sp.h:88
@ SP_INTERNAL_ERROR
Definition: sp.h:103
@ SP_NO_DB_ERROR
Definition: sp.h:82
@ SP_LOAD_FAILED
Definition: sp.h:97
@ SP_PARSE_ERROR
Definition: sp.h:100
@ SP_DOES_NOT_EXISTS
Definition: sp.h:85
@ SP_DROP_FAILED
Definition: sp.h:94
@ SP_STORE_FAILED
Definition: sp.h:91
@ SP_OK
Definition: sp.h:79
static const uint MYSQL_STORED_ROUTINE_BODY_LENGTH
Definition: sp.h:73
bool sp_drop_db_routines(THD *thd, const dd::Schema &schema)
Drop all routines in database 'db'.
Definition: sp.cc:1243
bool sp_update_routine(THD *thd, enum_sp_type type, sp_name *name, st_sp_chistics *chistics)
Updates(Alter) a stored routine.
Definition: sp.cc:1056
enum_sp_return_code sp_cache_routine(THD *thd, Sroutine_hash_entry *rt, bool lookup_only, sp_head **sp)
A helper wrapper around sp_cache_routine() to use from prelocking until 'sp_name' is eradicated as a ...
Definition: sp.cc:1959
enum_sp_return_code db_load_routine(THD *thd, enum_sp_type type, const char *sp_db, size_t sp_db_len, const char *sp_name, size_t sp_name_len, sp_head **sphp, sql_mode_t sql_mode, const char *params, const char *returns, const char *body, st_sp_chistics *chistics, const char *definer_user, const char *definer_host, longlong created, longlong modified, Stored_program_creation_ctx *creation_ctx)
Definition: sp.cc:496
bool sp_add_own_used_routine(Query_tables_list *prelocking_ctx, Query_arena *arena, Sroutine_hash_entry::entry_type type, sp_name *sp_name)
Convenience wrapper around sp_add_used_routine() for most common case - stored procedure or function ...
Definition: sp.h:363
void sp_finish_parsing(THD *thd)
Finish parsing of a stored program.
Definition: sp.cc:2273
bool load_collation(MEM_ROOT *mem_root, Field *field, const CHARSET_INFO *dflt_cl, const CHARSET_INFO **cl)
Definition: sp.cc:139
const uchar * sp_sroutine_key(const uchar *ptr, size_t *plen)
void sp_update_stmt_used_routines(THD *thd, Query_tables_list *prelocking_ctx, malloc_unordered_map< std::string, Sroutine_hash_entry * > *src, TABLE_LIST *belong_to_view)
Add contents of hash representing set of routines to the set of routines used by statement.
Definition: sp.cc:1917
static const int MYSQL_STORED_ROUTINE_COMMENT_LENGTH
Definition: sp.h:76
sp_head * sp_find_routine(THD *thd, enum_sp_type type, sp_name *name, sp_cache **cp, bool cache_only)
Obtain object representing stored procedure/function by its name from stored procedures cache and loo...
Definition: sp.cc:1536
case opt name
Definition: sslopt-case.h:32
Definition: m_ctype.h:354
Definition: table.h:2551
The LEX object currently serves three different purposes:
Definition: sql_lex.h:3659
The MEM_ROOT is a simple arena, where allocations are carved out of larger blocks.
Definition: my_alloc.h:82
Definition: mysql_lex_string.h:39
const char * str
Definition: mysql_lex_string.h:40
size_t length
Definition: mysql_lex_string.h:41
Definition: mysql_lex_string.h:34
char * str
Definition: mysql_lex_string.h:35
size_t length
Definition: mysql_lex_string.h:36
Definition: table.h:2684
Definition: table.h:1394
Definition: sql_lex.h:2424
unsigned int uint
Definition: uca-dump.cc:29
Item_result
Type of the user defined function return slot and arguments.
Definition: udf_registration_types.h:38