MySQL 8.4.3
Source Code Documentation
sp.h
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1/* Copyright (c) 2002, 2024, Oracle and/or its affiliates.
2
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14
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17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19
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21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
23
24#ifndef _SP_H_
25#define _SP_H_
26
27#include <assert.h>
28#include <stddef.h>
29#include <stdint.h>
30#include <sys/types.h>
31
32#include <string>
33
34#include "field_types.h"
35#include "lex_string.h"
36#include "map_helpers.h"
37#include "my_inttypes.h"
39#include "sql/item.h" // Item::Type
40#include "sql/sp_head.h" // Stored_program_creation_ctx
41#include "sql/sql_lex.h"
42
44class Query_arena;
45class THD;
46struct CHARSET_INFO;
47struct LEX_USER;
48struct MEM_ROOT;
49
50namespace dd {
51class Routine;
52class Schema;
53} // namespace dd
54
55class Field;
57class String;
58class sp_cache;
59struct TABLE;
60class Table_ref;
61
62using sql_mode_t = uint64_t;
63template <typename T>
64class SQL_I_List;
65
66enum class enum_sp_type;
67
68/* Tells what SP_DEFAULT_ACCESS should be mapped to */
69#define SP_DEFAULT_ACCESS_MAPPING SP_CONTAINS_SQL
70
71/* Tells what SP_IS_DEFAULT_SUID should be mapped to */
72#define SP_DEFAULT_SUID_MAPPING SP_IS_SUID
73
74/* Max length(LONGBLOB field type length) of stored routine body */
75static const uint MYSQL_STORED_ROUTINE_BODY_LENGTH = 4294967295U;
76
77/* Max length(TEXT field type length) of stored routine comment */
78static const int MYSQL_STORED_ROUTINE_COMMENT_LENGTH = 65535;
79
81 SP_OK = 0,
82
83 // Schema does not exists
85
86 // Routine does not exists
88
89 // Routine already exists
91
92 // Create routine failed
94
95 // Drop routine failed
97
98 // Routine load failed
100
101 // Routine parse failed
103
104 // Internal errors
107
108/*
109 Fields in mysql.proc table in 5.7. This enum is used to read and
110 update mysql.routines dictionary table during upgrade scenario.
111
112 Note: This enum should not be used for other purpose
113 as it will be removed eventually.
114*/
115enum {
138
139/*************************************************************************/
140
141/**
142 Stored_routine_creation_ctx -- creation context of stored routines
143 (stored procedures and functions).
144*/
145
147 public:
149 const dd::Routine *routine);
150
152 const sp_name *name,
153 TABLE *proc_tbl);
154
155 public:
157
158 protected:
159 Object_creation_ctx *create_backup_ctx(THD *thd) const override;
160 void delete_backup_ctx() override;
161
162 private:
165
167 const CHARSET_INFO *connection_cl,
168 const CHARSET_INFO *db_cl)
169 : Stored_program_creation_ctx(client_cs, connection_cl, db_cl) {}
170};
171
172/* Drop all routines in database 'db' */
173bool sp_drop_db_routines(THD *thd, const dd::Schema &schema);
174
175/**
176 Acquires exclusive metadata lock on all stored routines in the
177 given database.
178
179 @param thd Thread handler
180 @param schema Schema object
181
182 @retval false Success
183 @retval true Failure
184 */
185bool lock_db_routines(THD *thd, const dd::Schema &schema);
186
188 sp_cache **cp, bool cache_only);
189
191 sp_cache **cp);
192
194 bool lookup_only, sp_head **sp);
195
197 const sp_name *name, bool lookup_only,
198 sp_head **sp);
199
200bool sp_exist_routines(THD *thd, Table_ref *procs, bool is_proc);
201
203
205 THD *thd, enum_sp_type type, const char *sp_db, size_t sp_db_len,
206 const char *sp_name, size_t sp_name_len, sp_head **sphp,
207 sql_mode_t sql_mode, const char *params, const char *returns,
208 const char *body, st_sp_chistics *chistics, const char *definer_user,
209 const char *definer_host, longlong created, longlong modified,
210 Stored_program_creation_ctx *creation_ctx);
211
212bool sp_create_routine(THD *thd, sp_head *sp, const LEX_USER *definer,
213 bool if_not_exists, bool &sp_already_exists);
214
216 st_sp_chistics *chistics);
217
219
220/**
221 Structure that represents element in the set of stored routines
222 used by statement or routine.
223*/
224
226 public:
227 /**
228 Key identifying routine or other object added to the set.
229
230 Key format: "@<1-byte entry type@>@<db name@>\0@<routine/object name@>\0".
231
232 @note We use binary comparison for these keys as the @<db name@> component
233 requires case-sensitive comparison on --lower-case-table-names=0
234 systems. On systems where --lower-case-table-names > 0 database
235 names which passed to functions working with this set are already
236 lowercased. So binary comparison is equivalent to case-insensitive
237 comparison for them.
238 Routine names are case and accent insensitive. To achieve such
239 comparison we normalize routine names by converting their characters
240 to their sort weights (according to case and accent insensitive
241 collation). In this case, the actual routine name is also stored in
242 the member m_object_name.
243
244 @note For Foreign Key objects, '@<db name@>\0@<object name@>\0' part of the
245 key is compatible with keys used by MDL. So one can easily construct
246 MDL_key from this key.
247 */
248 char *m_key;
252
257 /**
258 Parent table in a foreign key on which child table there was insert
259 or update. We will lookup new values in parent, so need to acquire
260 SR lock on it.
261 */
263 /**
264 Child table in a foreign key with RESTRICT/NO ACTION as corresponding
265 rule and on which parent table there was delete or update.
266 We will check if old parent key is referenced by child table,
267 so need to acquire SR lock on it.
268 */
270 /**
271 Child table in a foreign key with CASCADE/SET NULL/SET DEFAULT as
272 'on update' rule, on which parent there was update, or with SET NULL/
273 SET DEFAULT as 'on delete' rule, on which parent there was delete.
274 We might need to update rows in child table, so we need to acquire
275 SW lock on it. We also need to take into account that child table
276 might be parent for some other FKs, so such update needs
277 to be handled recursively.
278 */
280 /**
281 Child table in a foreign key with CASCADE as 'on delete' rule for
282 which there was delete from the parent table.
283 We might need to delete rows from the child table, so we need to
284 acquire SW lock on it.
285 We also need to take into account that child table might be parent
286 for some other FKs, so such delete needs to be handled recursively
287 (and even might result in updates).
288 */
290 };
291
292 entry_type type() const { return (entry_type)m_key[0]; }
293 const char *db() const { return (char *)m_key + 1; }
294 size_t db_length() const { return m_db_length; }
295 const char *name() const {
297 : (char *)m_key + 1 + m_db_length + 1;
298 }
299 size_t name_length() const {
301 : m_key_length - 1U - m_db_length - 1U - 1U;
302 }
303 bool use_normalized_key() const {
304 return (type() == FUNCTION || type() == PROCEDURE || type() == TRIGGER);
305 }
306
307 const char *part_mdl_key() {
308 assert(!use_normalized_key());
309 return (char *)m_key + 1;
310 }
312 assert(!use_normalized_key());
313 return m_key_length - 1U;
314 }
315
316 /**
317 Next element in list linking all routines in set. See also comments
318 for LEX::sroutine/sroutine_list and sp_head::m_sroutines.
319 */
321 /**
322 Uppermost view which directly or indirectly uses this routine.
323 0 if routine is not used in view. Note that it also can be 0 if
324 statement uses routine both via view and directly.
325 */
327 /**
328 This is for prepared statement validation purposes.
329 A statement looks up and pre-loads all its stored functions
330 at prepare. Later on, if a function is gone from the cache,
331 execute may fail. Similarly, tables involved in referential
332 constraints are also prelocked.
333 Remember the version of the cached item at prepare to be able to
334 invalidate the prepared statement at execute if it
335 changes.
336 */
338};
339
340/*
341 Enum to indicate SP name normalization required when constructing a key
342 in sp_add_used_routine method.
343*/
345 LEAVE_AS_IS = 0, // No normalization needed.
346 LOWERCASE_NAME, // Lower case SP name.
347 UNACCENT_AND_LOWERCASE_NAME, // Lower case SP name and remove accent.
348};
349
350/*
351 Procedures for handling sets of stored routines used by statement or routine.
352*/
353bool sp_add_used_routine(Query_tables_list *prelocking_ctx, Query_arena *arena,
355 size_t db_length, const char *name, size_t name_length,
356 bool lowercase_db,
357 Sp_name_normalize_type name_normalize_type,
358 bool own_routine, Table_ref *belong_to_view);
359
360/**
361 Convenience wrapper around sp_add_used_routine() for most common case -
362 stored procedure or function which are explicitly used by the statement.
363*/
364
365inline bool sp_add_own_used_routine(Query_tables_list *prelocking_ctx,
366 Query_arena *arena,
368 sp_name *sp_name) {
371
372 return sp_add_used_routine(
373 prelocking_ctx, arena, type, sp_name->m_db.str, sp_name->m_db.length,
376}
377
380 THD *thd, Query_tables_list *prelocking_ctx,
382 Table_ref *belong_to_view);
383void sp_update_stmt_used_routines(THD *thd, Query_tables_list *prelocking_ctx,
385 Table_ref *belong_to_view);
386
387const uchar *sp_sroutine_key(const uchar *ptr, size_t *plen);
388
389bool load_charset(MEM_ROOT *mem_root, Field *field, const CHARSET_INFO *dflt_cs,
390 const CHARSET_INFO **cs);
391
393 const CHARSET_INFO *dflt_cl, const CHARSET_INFO **cl);
394
395///////////////////////////////////////////////////////////////////////////
396
398
399void sp_finish_parsing(THD *thd);
400
401///////////////////////////////////////////////////////////////////////////
402
404
405bool sp_check_name(LEX_STRING *ident);
406
407Table_ref *sp_add_to_query_tables(THD *thd, LEX *lex, const char *db,
408 const char *name);
409
410Item *sp_prepare_func_item(THD *thd, bool standalone, Item **it_addr);
411
412bool sp_eval_expr(THD *thd, bool standalone, Field *result_field,
413 Item **expr_item_ptr);
414
415String *sp_get_item_value(THD *thd, Item *item, String *str);
416
417///////////////////////////////////////////////////////////////////////////
418
419#endif /* _SP_H_ */
Definition: field.h:575
Base class that is used to represent any kind of expression in a relational query.
Definition: item.h:936
Object_creation_ctx – interface for creation context of database objects (views, stored routines,...
Definition: table.h:201
Definition: sql_class.h:348
Definition: sql_lex.h:2597
Simple intrusive linked list.
Definition: sql_list.h:47
Structure that represents element in the set of stored routines used by statement or routine.
Definition: sp.h:225
bool use_normalized_key() const
Definition: sp.h:303
entry_type type() const
Definition: sp.h:292
LEX_CSTRING m_object_name
Definition: sp.h:249
Table_ref * belong_to_view
Uppermost view which directly or indirectly uses this routine.
Definition: sp.h:326
Sroutine_hash_entry * next
Next element in list linking all routines in set.
Definition: sp.h:320
int64 m_cache_version
This is for prepared statement validation purposes.
Definition: sp.h:337
uint16 m_db_length
Definition: sp.h:251
const char * name() const
Definition: sp.h:295
const char * db() const
Definition: sp.h:293
size_t part_mdl_key_length()
Definition: sp.h:311
char * m_key
Key identifying routine or other object added to the set.
Definition: sp.h:248
entry_type
Definition: sp.h:253
@ FUNCTION
Definition: sp.h:254
@ FK_TABLE_ROLE_CHILD_UPDATE
Child table in a foreign key with CASCADE/SET NULL/SET DEFAULT as 'on update' rule,...
Definition: sp.h:279
@ 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:289
@ FK_TABLE_ROLE_PARENT_CHECK
Parent table in a foreign key on which child table there was insert or update.
Definition: sp.h:262
@ TRIGGER
Definition: sp.h:256
@ PROCEDURE
Definition: sp.h:255
@ 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:269
const char * part_mdl_key()
Definition: sp.h:307
uint16 m_key_length
Definition: sp.h:250
size_t db_length() const
Definition: sp.h:294
size_t name_length() const
Definition: sp.h:299
Stored_program_creation_ctx – base class for creation context of stored programs (stored routines,...
Definition: sp_head.h:92
Stored_routine_creation_ctx – creation context of stored routines (stored procedures and functions).
Definition: sp.h:146
Object_creation_ctx * create_backup_ctx(THD *thd) const override
Definition: sp.cc:249
static Stored_routine_creation_ctx * load_from_db(THD *thd, const sp_name *name, TABLE *proc_tbl)
Definition: sp.cc:186
static Stored_routine_creation_ctx * create_routine_creation_ctx(const dd::Routine *routine)
Definition: sp.cc:165
Stored_routine_creation_ctx(const CHARSET_INFO *client_cs, const CHARSET_INFO *connection_cl, const CHARSET_INFO *db_cl)
Definition: sp.h:166
Stored_program_creation_ctx * clone(MEM_ROOT *mem_root) override
Definition: sp.cc:243
void delete_backup_ctx() override
Definition: sp.cc:255
Stored_routine_creation_ctx(THD *thd)
Definition: sp.h:163
Using this class is fraught with peril, and you need to be very careful when doing so.
Definition: sql_string.h:167
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_lexer_thd.h:36
Definition: table.h:2864
Abstract base class for functions and procedures.
Definition: routine.h:61
Definition: schema.h:63
std::unordered_map, but with my_malloc, so that you can track the memory used using PSI memory keys.
Definition: map_helpers.h:157
Definition: sp_cache.cc:42
sp_head represents one instance of a stored program.
Definition: sp_head.h:383
Definition: sp_head.h:123
LEX_STRING m_name
Definition: sp_head.h:126
LEX_CSTRING m_db
Definition: sp_head.h:125
static MEM_ROOT mem_root
Definition: client_plugin.cc:114
uint64_t sql_mode_t
Definition: dd_event.h:39
This file contains the field type.
enum_sp_type
enum_sp_type defines type codes of stored programs.
Definition: sql_lex.h:224
Some integer typedefs for easier portability.
unsigned char uchar
Definition: my_inttypes.h:52
int64_t int64
Definition: my_inttypes.h:68
long long int longlong
Definition: my_inttypes.h:55
uint16_t uint16
Definition: my_inttypes.h:65
static const char * sql_mode
Definition: mysqlslap.cc:199
std::string str(const mysqlrouter::ConfigGenerator::Options::Endpoint &ep)
Definition: config_generator.cc:1081
borrowable::session_track::Schema< true > Schema
Definition: classic_protocol_session_track.h:288
Definition: commit_order_queue.h:34
The version of the current data dictionary table definitions.
Definition: dictionary_client.h:43
required string type
Definition: replication_group_member_actions.proto:34
Item * sp_prepare_func_item(THD *thd, bool standalone, Item **it_addr)
Prepare an Item for evaluation (call of fix_fields).
Definition: sp.cc:2484
bool sp_check_name(LEX_STRING *ident)
Check that the name 'ident' is ok.
Definition: sp.cc:2452
Table_ref * sp_add_to_query_tables(THD *thd, LEX *lex, const char *db, const char *name)
bool sp_eval_expr(THD *thd, bool standalone, Field *result_field, Item **expr_item_ptr)
Evaluate an expression and store the result in the field.
Definition: sp.cc:2526
enum_sp_return_code sp_drop_routine(THD *thd, enum_sp_type type, sp_name *name)
Drops a stored routine.
Definition: sp.cc:926
void sp_update_stmt_used_routines(THD *thd, Query_tables_list *prelocking_ctx, malloc_unordered_map< std::string, Sroutine_hash_entry * > *src, Table_ref *belong_to_view)
Add contents of hash representing set of routines to the set of routines used by statement.
Definition: sp.cc:1916
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:1570
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:1883
Sp_name_normalize_type
Definition: sp.h:344
uint sp_get_flags_for_command(LEX *lex)
Definition: sp.cc:2292
bool load_charset(MEM_ROOT *mem_root, Field *field, const CHARSET_INFO *dflt_cs, const CHARSET_INFO **cs)
Definition: sp.cc:120
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:1472
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:797
String * sp_get_item_value(THD *thd, Item *item, String *str)
Return a string representation of the Item value.
Definition: sp.cc:2595
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:1178
enum_sp_return_code
Definition: sp.h:80
@ SP_ALREADY_EXISTS
Definition: sp.h:90
@ SP_INTERNAL_ERROR
Definition: sp.h:105
@ SP_NO_DB_ERROR
Definition: sp.h:84
@ SP_LOAD_FAILED
Definition: sp.h:99
@ SP_PARSE_ERROR
Definition: sp.h:102
@ SP_DOES_NOT_EXISTS
Definition: sp.h:87
@ SP_DROP_FAILED
Definition: sp.h:96
@ SP_STORE_FAILED
Definition: sp.h:93
@ SP_OK
Definition: sp.h:81
static const uint MYSQL_STORED_ROUTINE_BODY_LENGTH
Definition: sp.h:75
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_ref *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:1789
@ MYSQL_PROC_FIELD_PARAM_LIST
Definition: sp.h:124
@ MYSQL_PROC_FIELD_DETERMINISTIC
Definition: sp.h:122
@ MYSQL_PROC_FIELD_CHARACTER_SET_CLIENT
Definition: sp.h:132
@ MYSQL_PROC_FIELD_RETURNS
Definition: sp.h:125
@ MYSQL_PROC_FIELD_SECURITY_TYPE
Definition: sp.h:123
@ MYSQL_PROC_FIELD_NAME
Definition: sp.h:117
@ MYSQL_PROC_FIELD_COUNT
Definition: sp.h:136
@ MYSQL_PROC_FIELD_LANGUAGE
Definition: sp.h:120
@ MYSQL_PROC_MYSQL_TYPE
Definition: sp.h:118
@ MYSQL_PROC_FIELD_SPECIFIC_NAME
Definition: sp.h:119
@ MYSQL_PROC_FIELD_COMMENT
Definition: sp.h:131
@ MYSQL_PROC_FIELD_SQL_MODE
Definition: sp.h:130
@ MYSQL_PROC_FIELD_DB_COLLATION
Definition: sp.h:134
@ MYSQL_PROC_FIELD_BODY
Definition: sp.h:126
@ MYSQL_PROC_FIELD_CREATED
Definition: sp.h:128
@ MYSQL_PROC_FIELD_ACCESS
Definition: sp.h:121
@ MYSQL_PROC_FIELD_COLLATION_CONNECTION
Definition: sp.h:133
@ MYSQL_PROC_FIELD_DB
Definition: sp.h:116
@ MYSQL_PROC_FIELD_MODIFIED
Definition: sp.h:129
@ MYSQL_PROC_FIELD_BODY_UTF8
Definition: sp.h:135
@ MYSQL_PROC_FIELD_DEFINER
Definition: sp.h:127
bool sp_drop_db_routines(THD *thd, const dd::Schema &schema)
Drop all routines in database 'db'.
Definition: sp.cc:1242
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
bool sp_exist_routines(THD *thd, Table_ref *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:1651
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:1958
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:498
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:365
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:141
const uchar * sp_sroutine_key(const uchar *ptr, size_t *plen)
static const int MYSQL_STORED_ROUTINE_COMMENT_LENGTH
Definition: sp.h:78
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:1535
case opt name
Definition: sslopt-case.h:29
Definition: m_ctype.h:423
Definition: table.h:2731
The LEX object currently serves three different purposes:
Definition: sql_lex.h:3823
The MEM_ROOT is a simple arena, where allocations are carved out of larger blocks.
Definition: my_alloc.h:83
Definition: mysql_lex_string.h:40
const char * str
Definition: mysql_lex_string.h:41
size_t length
Definition: mysql_lex_string.h:42
Definition: mysql_lex_string.h:35
char * str
Definition: mysql_lex_string.h:36
size_t length
Definition: mysql_lex_string.h:37
Definition: table.h:1406
Definition: sql_lex.h:2555