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mariadb/sql/sp.cc
unknown d5303b8ab8 Fix for bug #12704 "Server crashes during trigger execution". 
This bug occurs when some trigger for table used by DML statement is created
or changed while statement was waiting in lock_tables(). In this situation
prelocking set which we have calculated becames invalid which can easily lead
to errors and even in some cases to crashes.

With proposed patch we no longer silently reopen tables in lock_tables(),
instead caller of lock_tables() becomes responsible for reopening tables and
recalculation of prelocking set.


mysql-test/t/trigger.test:
  Added tests for bug #12704 "Server crashes during trigger execution".
  Unfortunately these tests rely on the order in which tables are locked
  by statement so they are non-determenistic and therefore should be disabled.
sql/lock.cc:
  mysql_lock_tables():
    Now instead of always reopening altered or dropped tables by itself
    mysql_lock_tables() can notify upper level and rely on caller doing this.
sql/mysql_priv.h:
  Now mysql_lock_tables() can either reopen deleted or altered tables by itself
  or notify caller about such situation through 'need_reopen' argument and rely
  on it in this.
  Also lock_tables() has new 'need_reopen' out parameter through which it
  notifies caller that some tables were altered or dropped so he needs to reopen
  them (and rebuild prelocking set some triggers may change or simply appear).
sql/sp.cc:
  sp_add_used_routine():
    To be able to restore LEX::sroutines_list to its state right after parsing
    we now adjust  LEX::sroutines_list_own_last/sroutines_list_own_elements when
    we add directly used routine.
  sp_remove_not_own_routines():
    Added procedure for restoring LEX::sroutines/sroutines_list to their state
    right after parsing (by throwing out non-directly used routines).
  sp_cache_routines_and_add_tables_for_view()/sp_update_stmt_used_routines():
    We should use LEX::sroutines_list instead of LEX::sroutines as source of
    routines used by view, since LEX::sroutines is not availiable for view
    on second attempt to open it (see comment in open_tables() about it).
sql/sp.h:
  sp_remove_not_own_routines():
    Added procedure for restoring LEX::sroutines/sroutines_list to their state
    right after parsing (by throwing out non-directly used routines).
sql/sp_head.cc:
  Removed assert which is no longer always true.
sql/sql_base.cc:
  reopen_table():
    When we re-open table and do shallow copy of TABLE object we should adjust
    pointers to it in associated Table_triggers_list object. Removed nil
    operation.
  open_tables():
    Now this function is able to rebuild prelocking set for statement if it is
    needed. It also correctly handles FLUSH TABLES which may occur during its
    execution.
  lock_tables():
    Instead of allowing mysql_lock_tables() to silently reopen altered or dropped
    tables let us notify caller and rely on that it will do reopen itself.
    This solves the problem when trigger suddenly appears or changed during
    mysq_lock_tables().
  close_tables_for_reopen():
    Added routine for properly preparing for reopening of tables and recalculation
    of set of prelocked tables.
sql/sql_handler.cc:
  Here we let mysql_lock_tables() to reopen dropped or altered tables by itself.
sql/sql_insert.cc:
  Here we let mysql_lock_tables() to reopen dropped or altered tables by itself.
sql/sql_lex.cc:
  LEX:
    Added 'sroutines_list_own_last' and 'sroutines_list_own_elements' members
    which are used for keeping state in which 'sroutines_list' was right after
    statement parsing (and for restoring of this list to this state).
sql/sql_lex.h:
  LEX:
    Added 'sroutines_list_own_last' and 'sroutines_list_own_elements' members
    which are used for keeping state in which 'sroutines_list' was right after
    statement parsing (and for restoring of this list to this state).
    Added chop_off_not_own_tables() method to simplify throwing away list
    of implicitly used (prelocked) tables.
sql/sql_prepare.cc:
  Now instead of silently reopening altered or dropped tables in
  lock_tables() we notify caller and rely on that the caller will
  reopen tables.
sql/sql_table.cc:
  Here we let mysql_lock_tables() to reopen dropped or altered tables by itself.
sql/sql_trigger.cc:
  Added Table_triggers_list::set_table() method to adjust Table_triggers_list
  to new pointer to TABLE instance.
sql/sql_trigger.h:
  Added Table_triggers_list::set_table() method to adjust Table_triggers_list
  to new pointer to TABLE instance.
sql/sql_update.cc:
  Now instead of silently reopening altered or dropped tables in
  lock_tables() we notify caller and rely on that the caller will
  reopen tables.
2005-09-15 03:56:09 +04:00

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/* Copyright (C) 2002 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "mysql_priv.h"
#include "sp.h"
#include "sp_head.h"
#include "sp_cache.h"
#include "sql_trigger.h"
static bool
create_string(THD *thd, String *buf,
int sp_type,
sp_name *name,
const char *params, ulong paramslen,
const char *returns, ulong returnslen,
const char *body, ulong bodylen,
st_sp_chistics *chistics);
/*
*
* DB storage of Stored PROCEDUREs and FUNCTIONs
*
*/
enum
{
MYSQL_PROC_FIELD_DB = 0,
MYSQL_PROC_FIELD_NAME,
MYSQL_PROC_FIELD_TYPE,
MYSQL_PROC_FIELD_SPECIFIC_NAME,
MYSQL_PROC_FIELD_LANGUAGE,
MYSQL_PROC_FIELD_ACCESS,
MYSQL_PROC_FIELD_DETERMINISTIC,
MYSQL_PROC_FIELD_SECURITY_TYPE,
MYSQL_PROC_FIELD_PARAM_LIST,
MYSQL_PROC_FIELD_RETURNS,
MYSQL_PROC_FIELD_BODY,
MYSQL_PROC_FIELD_DEFINER,
MYSQL_PROC_FIELD_CREATED,
MYSQL_PROC_FIELD_MODIFIED,
MYSQL_PROC_FIELD_SQL_MODE,
MYSQL_PROC_FIELD_COMMENT,
MYSQL_PROC_FIELD_COUNT
};
bool mysql_proc_table_exists= 1;
/* Tells what SP_DEFAULT_ACCESS should be mapped to */
#define SP_DEFAULT_ACCESS_MAPPING SP_CONTAINS_SQL
/*
Close mysql.proc, opened with open_proc_table_for_read().
SYNOPSIS
close_proc_table()
thd Thread context
backup Pointer to Open_tables_state instance which holds
information about tables which were open before we
decided to access mysql.proc.
*/
void close_proc_table(THD *thd, Open_tables_state *backup)
{
close_thread_tables(thd);
thd->restore_backup_open_tables_state(backup);
}
/*
Open the mysql.proc table for read.
SYNOPSIS
open_proc_table_for_read()
thd Thread context
backup Pointer to Open_tables_state instance where information about
currently open tables will be saved, and from which will be
restored when we will end work with mysql.proc.
NOTES
Thanks to restrictions which we put on opening and locking of
this table for writing, we can open and lock it for reading
even when we already have some other tables open and locked.
One must call close_proc_table() to close table opened with
this call.
RETURN
0 Error
# Pointer to TABLE object of mysql.proc
*/
TABLE *open_proc_table_for_read(THD *thd, Open_tables_state *backup)
{
TABLE_LIST tables;
TABLE *table;
bool not_used;
DBUG_ENTER("open_proc_table");
/*
Speed up things if mysql.proc doesn't exists. mysql_proc_table_exists
is set when we create or read stored procedure or on flush privileges.
*/
if (!mysql_proc_table_exists)
DBUG_RETURN(0);
thd->reset_n_backup_open_tables_state(backup);
bzero((char*) &tables, sizeof(tables));
tables.db= (char*) "mysql";
tables.table_name= tables.alias= (char*)"proc";
if (!(table= open_table(thd, &tables, thd->mem_root, &not_used,
MYSQL_LOCK_IGNORE_FLUSH)))
{
thd->restore_backup_open_tables_state(backup);
mysql_proc_table_exists= 0;
DBUG_RETURN(0);
}
DBUG_ASSERT(table->s->system_table);
table->reginfo.lock_type= TL_READ;
/*
We have to ensure we are not blocked by a flush tables, as this
could lead to a deadlock if we have other tables opened.
*/
if (!(thd->lock= mysql_lock_tables(thd, &table, 1,
MYSQL_LOCK_IGNORE_FLUSH, &not_used)))
{
close_proc_table(thd, backup);
DBUG_RETURN(0);
}
DBUG_RETURN(table);
}
/*
Open the mysql.proc table for update.
SYNOPSIS
open_proc_table_for_update()
thd Thread context
NOTES
Table opened with this call should closed using close_thread_tables().
RETURN
0 Error
# Pointer to TABLE object of mysql.proc
*/
static TABLE *open_proc_table_for_update(THD *thd)
{
TABLE_LIST tables;
TABLE *table;
DBUG_ENTER("open_proc_table");
bzero((char*) &tables, sizeof(tables));
tables.db= (char*) "mysql";
tables.table_name= tables.alias= (char*)"proc";
tables.lock_type= TL_WRITE;
table= open_ltable(thd, &tables, TL_WRITE);
/*
Under explicit LOCK TABLES or in prelocked mode we should not
say that mysql.proc table does not exist if we are unable to
open and lock it for writing since this condition may be
transient.
*/
if (!(thd->locked_tables || thd->prelocked_mode) || table)
mysql_proc_table_exists= test(table);
DBUG_RETURN(table);
}
/*
Find row in open mysql.proc table representing stored routine.
SYNOPSIS
db_find_routine_aux()
thd Thread context
type Type of routine to find (function or procedure)
name Name of routine
table TABLE object for open mysql.proc table.
RETURN VALUE
SP_OK - Routine found
SP_KEY_NOT_FOUND- No routine with given name
*/
static int
db_find_routine_aux(THD *thd, int type, sp_name *name, TABLE *table)
{
byte key[MAX_KEY_LENGTH]; // db, name, optional key length type
DBUG_ENTER("db_find_routine_aux");
DBUG_PRINT("enter", ("type: %d name: %*s",
type, name->m_name.length, name->m_name.str));
/*
Create key to find row. We have to use field->store() to be able to
handle VARCHAR and CHAR fields.
Assumption here is that the three first fields in the table are
'db', 'name' and 'type' and the first key is the primary key over the
same fields.
*/
if (name->m_name.length > table->field[1]->field_length)
DBUG_RETURN(SP_KEY_NOT_FOUND);
table->field[0]->store(name->m_db.str, name->m_db.length, &my_charset_bin);
table->field[1]->store(name->m_name.str, name->m_name.length,
&my_charset_bin);
table->field[2]->store((longlong) type);
key_copy(key, table->record[0], table->key_info,
table->key_info->key_length);
if (table->file->index_read_idx(table->record[0], 0,
key, table->key_info->key_length,
HA_READ_KEY_EXACT))
DBUG_RETURN(SP_KEY_NOT_FOUND);
DBUG_RETURN(SP_OK);
}
/*
Find routine definition in mysql.proc table and create corresponding
sp_head object for it.
SYNOPSIS
db_find_routine()
thd Thread context
type Type of routine (TYPE_ENUM_PROCEDURE/...)
name Name of routine
sphp Out parameter in which pointer to created sp_head
object is returned (0 in case of error).
NOTE
This function may damage current LEX during execution, so it is good
idea to create temporary LEX and make it active before calling it.
RETURN VALUE
0 - Success
non-0 - Error (may be one of special codes like SP_KEY_NOT_FOUND)
*/
static int
db_find_routine(THD *thd, int type, sp_name *name, sp_head **sphp)
{
extern int yyparse(void *thd);
TABLE *table;
const char *params, *returns, *body;
int ret;
const char *definer;
longlong created;
longlong modified;
st_sp_chistics chistics;
char *ptr;
uint length;
char buff[65];
String str(buff, sizeof(buff), &my_charset_bin);
ulong sql_mode;
Open_tables_state open_tables_state_backup;
DBUG_ENTER("db_find_routine");
DBUG_PRINT("enter", ("type: %d name: %*s",
type, name->m_name.length, name->m_name.str));
*sphp= 0; // In case of errors
if (!(table= open_proc_table_for_read(thd, &open_tables_state_backup)))
DBUG_RETURN(SP_OPEN_TABLE_FAILED);
if ((ret= db_find_routine_aux(thd, type, name, table)) != SP_OK)
goto done;
if (table->s->fields != MYSQL_PROC_FIELD_COUNT)
{
ret= SP_GET_FIELD_FAILED;
goto done;
}
bzero((char *)&chistics, sizeof(chistics));
if ((ptr= get_field(thd->mem_root,
table->field[MYSQL_PROC_FIELD_ACCESS])) == NULL)
{
ret= SP_GET_FIELD_FAILED;
goto done;
}
switch (ptr[0]) {
case 'N':
chistics.daccess= SP_NO_SQL;
break;
case 'C':
chistics.daccess= SP_CONTAINS_SQL;
break;
case 'R':
chistics.daccess= SP_READS_SQL_DATA;
break;
case 'M':
chistics.daccess= SP_MODIFIES_SQL_DATA;
break;
default:
chistics.daccess= SP_DEFAULT_ACCESS_MAPPING;
}
if ((ptr= get_field(thd->mem_root,
table->field[MYSQL_PROC_FIELD_DETERMINISTIC])) == NULL)
{
ret= SP_GET_FIELD_FAILED;
goto done;
}
chistics.detistic= (ptr[0] == 'N' ? FALSE : TRUE);
if ((ptr= get_field(thd->mem_root,
table->field[MYSQL_PROC_FIELD_SECURITY_TYPE])) == NULL)
{
ret= SP_GET_FIELD_FAILED;
goto done;
}
chistics.suid= (ptr[0] == 'I' ? SP_IS_NOT_SUID : SP_IS_SUID);
if ((params= get_field(thd->mem_root,
table->field[MYSQL_PROC_FIELD_PARAM_LIST])) == NULL)
{
params= "";
}
if (type == TYPE_ENUM_PROCEDURE)
returns= "";
else if ((returns= get_field(thd->mem_root,
table->field[MYSQL_PROC_FIELD_RETURNS])) == NULL)
{
ret= SP_GET_FIELD_FAILED;
goto done;
}
if ((body= get_field(thd->mem_root,
table->field[MYSQL_PROC_FIELD_BODY])) == NULL)
{
ret= SP_GET_FIELD_FAILED;
goto done;
}
// Get additional information
if ((definer= get_field(thd->mem_root,
table->field[MYSQL_PROC_FIELD_DEFINER])) == NULL)
{
ret= SP_GET_FIELD_FAILED;
goto done;
}
modified= table->field[MYSQL_PROC_FIELD_MODIFIED]->val_int();
created= table->field[MYSQL_PROC_FIELD_CREATED]->val_int();
sql_mode= (ulong) table->field[MYSQL_PROC_FIELD_SQL_MODE]->val_int();
table->field[MYSQL_PROC_FIELD_COMMENT]->val_str(&str, &str);
ptr= 0;
if ((length= str.length()))
ptr= thd->strmake(str.ptr(), length);
chistics.comment.str= ptr;
chistics.comment.length= length;
close_proc_table(thd, &open_tables_state_backup);
table= 0;
{
String defstr;
LEX *oldlex= thd->lex;
char olddb[128];
bool dbchanged;
enum enum_sql_command oldcmd= thd->lex->sql_command;
ulong old_sql_mode= thd->variables.sql_mode;
ha_rows select_limit= thd->variables.select_limit;
thd->variables.sql_mode= sql_mode;
thd->variables.select_limit= HA_POS_ERROR;
defstr.set_charset(system_charset_info);
if (!create_string(thd, &defstr,
type,
name,
params, strlen(params),
returns, strlen(returns),
body, strlen(body),
&chistics))
{
ret= SP_INTERNAL_ERROR;
goto done;
}
dbchanged= FALSE;
if ((ret= sp_use_new_db(thd, name->m_db.str, olddb, sizeof(olddb),
1, &dbchanged)))
goto done;
{
/* This is something of a kludge. We need to initialize some fields
* in thd->lex (the unit and master stuff), and the easiest way to
* do it is, is to call mysql_init_query(), but this unfortunately
* resets teh value_list where we keep the CALL parameters. So we
* copy the list and then restore it. (... and found_semicolon too).
*/
List<Item> tmpvals= thd->lex->value_list;
char *tmpfsc= thd->lex->found_semicolon;
lex_start(thd, (uchar*)defstr.c_ptr(), defstr.length());
thd->lex->value_list= tmpvals;
thd->lex->found_semicolon= tmpfsc;
}
if (yyparse(thd) || thd->is_fatal_error || thd->lex->sphead == NULL)
{
LEX *newlex= thd->lex;
sp_head *sp= newlex->sphead;
if (dbchanged && (ret= mysql_change_db(thd, olddb, 1)))
goto done;
if (sp)
{
delete sp;
newlex->sphead= NULL;
}
ret= SP_PARSE_ERROR;
}
else
{
if (dbchanged && (ret= mysql_change_db(thd, olddb, 1)))
goto done;
*sphp= thd->lex->sphead;
(*sphp)->set_info((char *)definer, (uint)strlen(definer),
created, modified, &chistics, sql_mode);
(*sphp)->optimize();
}
thd->lex->sql_command= oldcmd;
thd->variables.sql_mode= old_sql_mode;
thd->variables.select_limit= select_limit;
}
done:
if (table)
close_proc_table(thd, &open_tables_state_backup);
DBUG_RETURN(ret);
}
static void
sp_returns_type(THD *thd, String &result, sp_head *sp)
{
TABLE table;
Field *field;
bzero(&table, sizeof(table));
table.in_use= thd;
table.s = &table.share_not_to_be_used;
field= sp->make_field(0, 0, &table);
field->sql_type(result);
delete field;
}
static int
db_create_routine(THD *thd, int type, sp_head *sp)
{
int ret;
TABLE *table;
char definer[HOSTNAME_LENGTH+USERNAME_LENGTH+2];
char olddb[128];
bool dbchanged;
DBUG_ENTER("db_create_routine");
DBUG_PRINT("enter", ("type: %d name: %*s",type,sp->m_name.length,sp->m_name.str));
dbchanged= FALSE;
if ((ret= sp_use_new_db(thd, sp->m_db.str, olddb, sizeof(olddb),
0, &dbchanged)))
{
ret= SP_NO_DB_ERROR;
goto done;
}
if (!(table= open_proc_table_for_update(thd)))
ret= SP_OPEN_TABLE_FAILED;
else
{
restore_record(table, s->default_values); // Get default values for fields
strxmov(definer, thd->priv_user, "@", thd->priv_host, NullS);
if (table->s->fields != MYSQL_PROC_FIELD_COUNT)
{
ret= SP_GET_FIELD_FAILED;
goto done;
}
if (sp->m_name.length > table->field[MYSQL_PROC_FIELD_NAME]->field_length)
{
ret= SP_BAD_IDENTIFIER;
goto done;
}
if (sp->m_body.length > table->field[MYSQL_PROC_FIELD_BODY]->field_length)
{
ret= SP_BODY_TOO_LONG;
goto done;
}
table->field[MYSQL_PROC_FIELD_DB]->
store(sp->m_db.str, sp->m_db.length, system_charset_info);
table->field[MYSQL_PROC_FIELD_NAME]->
store(sp->m_name.str, sp->m_name.length, system_charset_info);
table->field[MYSQL_PROC_FIELD_TYPE]->
store((longlong)type);
table->field[MYSQL_PROC_FIELD_SPECIFIC_NAME]->
store(sp->m_name.str, sp->m_name.length, system_charset_info);
if (sp->m_chistics->daccess != SP_DEFAULT_ACCESS)
table->field[MYSQL_PROC_FIELD_ACCESS]->
store((longlong)sp->m_chistics->daccess);
table->field[MYSQL_PROC_FIELD_DETERMINISTIC]->
store((longlong)(sp->m_chistics->detistic ? 1 : 2));
if (sp->m_chistics->suid != SP_IS_DEFAULT_SUID)
table->field[MYSQL_PROC_FIELD_SECURITY_TYPE]->
store((longlong)sp->m_chistics->suid);
table->field[MYSQL_PROC_FIELD_PARAM_LIST]->
store(sp->m_params.str, sp->m_params.length, system_charset_info);
if (sp->m_type == TYPE_ENUM_FUNCTION)
{
String retstr(64);
sp_returns_type(thd, retstr, sp);
table->field[MYSQL_PROC_FIELD_RETURNS]->
store(retstr.ptr(), retstr.length(), system_charset_info);
}
table->field[MYSQL_PROC_FIELD_BODY]->
store(sp->m_body.str, sp->m_body.length, system_charset_info);
table->field[MYSQL_PROC_FIELD_DEFINER]->
store(definer, (uint)strlen(definer), system_charset_info);
((Field_timestamp *)table->field[MYSQL_PROC_FIELD_CREATED])->set_time();
((Field_timestamp *)table->field[MYSQL_PROC_FIELD_MODIFIED])->set_time();
table->field[MYSQL_PROC_FIELD_SQL_MODE]->
store((longlong)thd->variables.sql_mode);
if (sp->m_chistics->comment.str)
table->field[MYSQL_PROC_FIELD_COMMENT]->
store(sp->m_chistics->comment.str, sp->m_chistics->comment.length,
system_charset_info);
if (!trust_routine_creators && mysql_bin_log.is_open())
{
if (!sp->m_chistics->detistic)
{
/*
Note that for a _function_ this test is not enough; one could use
a non-deterministic read-only function in an update statement.
*/
enum enum_sp_data_access access=
(sp->m_chistics->daccess == SP_DEFAULT_ACCESS) ?
SP_DEFAULT_ACCESS_MAPPING : sp->m_chistics->daccess;
if (access == SP_CONTAINS_SQL ||
access == SP_MODIFIES_SQL_DATA)
{
my_message(ER_BINLOG_UNSAFE_ROUTINE,
ER(ER_BINLOG_UNSAFE_ROUTINE), MYF(0));
ret= SP_INTERNAL_ERROR;
goto done;
}
}
if (!(thd->master_access & SUPER_ACL))
{
my_message(ER_BINLOG_CREATE_ROUTINE_NEED_SUPER,
ER(ER_BINLOG_CREATE_ROUTINE_NEED_SUPER), MYF(0));
ret= SP_INTERNAL_ERROR;
goto done;
}
}
ret= SP_OK;
if (table->file->write_row(table->record[0]))
ret= SP_WRITE_ROW_FAILED;
else if (mysql_bin_log.is_open())
{
thd->clear_error();
/* Such a statement can always go directly to binlog, no trans cache */
Query_log_event qinfo(thd, thd->query, thd->query_length, 0, FALSE);
mysql_bin_log.write(&qinfo);
}
}
done:
close_thread_tables(thd);
if (dbchanged)
(void)mysql_change_db(thd, olddb, 1);
DBUG_RETURN(ret);
}
static int
db_drop_routine(THD *thd, int type, sp_name *name)
{
TABLE *table;
int ret;
DBUG_ENTER("db_drop_routine");
DBUG_PRINT("enter", ("type: %d name: %*s",
type, name->m_name.length, name->m_name.str));
if (!(table= open_proc_table_for_update(thd)))
DBUG_RETURN(SP_OPEN_TABLE_FAILED);
if ((ret= db_find_routine_aux(thd, type, name, table)) == SP_OK)
{
if (table->file->delete_row(table->record[0]))
ret= SP_DELETE_ROW_FAILED;
}
close_thread_tables(thd);
DBUG_RETURN(ret);
}
static int
db_update_routine(THD *thd, int type, sp_name *name, st_sp_chistics *chistics)
{
TABLE *table;
int ret;
bool opened;
DBUG_ENTER("db_update_routine");
DBUG_PRINT("enter", ("type: %d name: %*s",
type, name->m_name.length, name->m_name.str));
if (!(table= open_proc_table_for_update(thd)))
DBUG_RETURN(SP_OPEN_TABLE_FAILED);
if ((ret= db_find_routine_aux(thd, type, name, table)) == SP_OK)
{
store_record(table,record[1]);
table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
((Field_timestamp *)table->field[MYSQL_PROC_FIELD_MODIFIED])->set_time();
if (chistics->suid != SP_IS_DEFAULT_SUID)
table->field[MYSQL_PROC_FIELD_SECURITY_TYPE]->
store((longlong)chistics->suid);
if (chistics->daccess != SP_DEFAULT_ACCESS)
table->field[MYSQL_PROC_FIELD_ACCESS]->
store((longlong)chistics->daccess);
if (chistics->comment.str)
table->field[MYSQL_PROC_FIELD_COMMENT]->store(chistics->comment.str,
chistics->comment.length,
system_charset_info);
if ((table->file->update_row(table->record[1],table->record[0])))
ret= SP_WRITE_ROW_FAILED;
}
close_thread_tables(thd);
DBUG_RETURN(ret);
}
struct st_used_field
{
const char *field_name;
uint field_length;
enum enum_field_types field_type;
Field *field;
};
static struct st_used_field init_fields[]=
{
{ "Db", NAME_LEN, MYSQL_TYPE_STRING, 0},
{ "Name", NAME_LEN, MYSQL_TYPE_STRING, 0},
{ "Type", 9, MYSQL_TYPE_STRING, 0},
{ "Definer", 77, MYSQL_TYPE_STRING, 0},
{ "Modified", 0, MYSQL_TYPE_TIMESTAMP, 0},
{ "Created", 0, MYSQL_TYPE_TIMESTAMP, 0},
{ "Security_type", 1, MYSQL_TYPE_STRING, 0},
{ "Comment", NAME_LEN, MYSQL_TYPE_STRING, 0},
{ 0, 0, MYSQL_TYPE_STRING, 0}
};
static int
print_field_values(THD *thd, TABLE *table,
struct st_used_field *used_fields,
int type, const char *wild)
{
Protocol *protocol= thd->protocol;
if (table->field[MYSQL_PROC_FIELD_TYPE]->val_int() == type)
{
String db_string;
String name_string;
struct st_used_field *used_field= used_fields;
if (get_field(thd->mem_root, used_field->field, &db_string))
db_string.set_ascii("", 0);
used_field+= 1;
get_field(thd->mem_root, used_field->field, &name_string);
if (!wild || !wild[0] || !wild_compare(name_string.ptr(), wild, 0))
{
protocol->prepare_for_resend();
protocol->store(&db_string);
protocol->store(&name_string);
for (used_field++;
used_field->field_name;
used_field++)
{
switch (used_field->field_type) {
case MYSQL_TYPE_TIMESTAMP:
{
TIME tmp_time;
bzero((char *)&tmp_time, sizeof(tmp_time));
((Field_timestamp *) used_field->field)->get_time(&tmp_time);
protocol->store(&tmp_time);
}
break;
default:
{
String tmp_string;
get_field(thd->mem_root, used_field->field, &tmp_string);
protocol->store(&tmp_string);
}
break;
}
}
if (protocol->write())
return SP_INTERNAL_ERROR;
}
}
return SP_OK;
}
static int
db_show_routine_status(THD *thd, int type, const char *wild)
{
TABLE *table;
TABLE_LIST tables;
int res;
DBUG_ENTER("db_show_routine_status");
memset(&tables, 0, sizeof(tables));
tables.db= (char*)"mysql";
tables.table_name= tables.alias= (char*)"proc";
if (! (table= open_ltable(thd, &tables, TL_READ)))
{
res= SP_OPEN_TABLE_FAILED;
goto done;
}
else
{
Item *item;
List<Item> field_list;
struct st_used_field *used_field;
TABLE_LIST *leaves= 0;
st_used_field used_fields[array_elements(init_fields)];
memcpy((char*) used_fields, (char*) init_fields, sizeof(used_fields));
/* Init header */
for (used_field= &used_fields[0];
used_field->field_name;
used_field++)
{
switch (used_field->field_type) {
case MYSQL_TYPE_TIMESTAMP:
field_list.push_back(item=new Item_datetime(used_field->field_name));
break;
default:
field_list.push_back(item=new Item_empty_string(used_field->field_name,
used_field->
field_length));
break;
}
}
/* Print header */
if (thd->protocol->send_fields(&field_list, Protocol::SEND_NUM_ROWS |
Protocol::SEND_EOF))
{
res= SP_INTERNAL_ERROR;
goto err_case;
}
/*
Init fields
tables is not VIEW for sure => we can pass 0 as condition
*/
thd->lex->select_lex.context.resolve_in_table_list_only(&tables);
setup_tables(thd, &thd->lex->select_lex.context,
&thd->lex->select_lex.top_join_list,
&tables, 0, &leaves, FALSE);
for (used_field= &used_fields[0];
used_field->field_name;
used_field++)
{
Item_field *field= new Item_field(&thd->lex->select_lex.context,
"mysql", "proc",
used_field->field_name);
if (!field ||
!(used_field->field= find_field_in_tables(thd, field, &tables, NULL,
0, REPORT_ALL_ERRORS, 1,
TRUE)))
{
res= SP_INTERNAL_ERROR;
goto err_case1;
}
}
table->file->ha_index_init(0);
if ((res= table->file->index_first(table->record[0])))
{
res= (res == HA_ERR_END_OF_FILE) ? 0 : SP_INTERNAL_ERROR;
goto err_case1;
}
if ((res= print_field_values(thd, table, used_fields, type, wild)))
goto err_case1;
while (!table->file->index_next(table->record[0]))
{
if ((res= print_field_values(thd, table, used_fields, type, wild)))
goto err_case1;
}
res= SP_OK;
}
err_case1:
send_eof(thd);
err_case:
table->file->ha_index_end();
close_thread_tables(thd);
done:
DBUG_RETURN(res);
}
/* Drop all routines in database 'db' */
int
sp_drop_db_routines(THD *thd, char *db)
{
TABLE *table;
byte key[64]; // db
uint keylen;
int ret;
DBUG_ENTER("sp_drop_db_routines");
DBUG_PRINT("enter", ("db: %s", db));
// Put the key used to read the row together
keylen= strlen(db);
if (keylen > 64)
keylen= 64;
memcpy(key, db, keylen);
memset(key+keylen, (int)' ', 64-keylen); // Pad with space
keylen= sizeof(key);
ret= SP_OPEN_TABLE_FAILED;
if (!(table= open_proc_table_for_update(thd)))
goto err;
ret= SP_OK;
table->file->ha_index_init(0);
if (! table->file->index_read(table->record[0],
key, keylen, HA_READ_KEY_EXACT))
{
int nxtres;
bool deleted= FALSE;
do
{
if (! table->file->delete_row(table->record[0]))
deleted= TRUE; /* We deleted something */
else
{
ret= SP_DELETE_ROW_FAILED;
nxtres= 0;
break;
}
} while (! (nxtres= table->file->index_next_same(table->record[0],
key, keylen)));
if (nxtres != HA_ERR_END_OF_FILE)
ret= SP_KEY_NOT_FOUND;
if (deleted)
sp_cache_invalidate();
}
table->file->ha_index_end();
close_thread_tables(thd);
err:
DBUG_RETURN(ret);
}
/*****************************************************************************
PROCEDURE
******************************************************************************/
/*
Obtain object representing stored procedure by its name from
stored procedures cache and looking into mysql.proc if needed.
SYNOPSIS
sp_find_procedure()
thd - thread context
name - name of procedure
cache_only - if true perform cache-only lookup
(Don't look in mysql.proc).
TODO
We should consider merging of sp_find_procedure() and
sp_find_function() into one sp_find_routine() function
(the same applies to other similarly paired functions).
RETURN VALUE
Non-0 pointer to sp_head object for the procedure, or
0 - in case of error.
*/
sp_head *
sp_find_procedure(THD *thd, sp_name *name, bool cache_only)
{
sp_head *sp;
DBUG_ENTER("sp_find_procedure");
DBUG_PRINT("enter", ("name: %*s.%*s",
name->m_db.length, name->m_db.str,
name->m_name.length, name->m_name.str));
if (!(sp= sp_cache_lookup(&thd->sp_proc_cache, name)) && !cache_only)
{
if (db_find_routine(thd, TYPE_ENUM_PROCEDURE, name, &sp) == SP_OK)
sp_cache_insert(&thd->sp_proc_cache, sp);
}
DBUG_RETURN(sp);
}
int
sp_exists_routine(THD *thd, TABLE_LIST *tables, bool any, bool no_error)
{
TABLE_LIST *table;
bool result= 0;
DBUG_ENTER("sp_exists_routine");
for (table= tables; table; table= table->next_global)
{
sp_name *name;
LEX_STRING lex_db;
LEX_STRING lex_name;
lex_db.length= strlen(table->db);
lex_name.length= strlen(table->table_name);
lex_db.str= thd->strmake(table->db, lex_db.length);
lex_name.str= thd->strmake(table->table_name, lex_name.length);
name= new sp_name(lex_db, lex_name);
name->init_qname(thd);
if (sp_find_procedure(thd, name) != NULL ||
sp_find_function(thd, name) != NULL)
{
if (any)
DBUG_RETURN(1);
result= 1;
}
else if (!any)
{
if (!no_error)
{
my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "FUNCTION or PROCEDURE",
table->table_name);
DBUG_RETURN(-1);
}
DBUG_RETURN(0);
}
}
DBUG_RETURN(result);
}
int
sp_create_procedure(THD *thd, sp_head *sp)
{
int ret;
DBUG_ENTER("sp_create_procedure");
DBUG_PRINT("enter", ("name: %*s", sp->m_name.length, sp->m_name.str));
ret= db_create_routine(thd, TYPE_ENUM_PROCEDURE, sp);
DBUG_RETURN(ret);
}
int
sp_drop_procedure(THD *thd, sp_name *name)
{
int ret;
DBUG_ENTER("sp_drop_procedure");
DBUG_PRINT("enter", ("name: %*s", name->m_name.length, name->m_name.str));
ret= db_drop_routine(thd, TYPE_ENUM_PROCEDURE, name);
if (!ret)
sp_cache_invalidate();
DBUG_RETURN(ret);
}
int
sp_update_procedure(THD *thd, sp_name *name, st_sp_chistics *chistics)
{
int ret;
DBUG_ENTER("sp_update_procedure");
DBUG_PRINT("enter", ("name: %*s", name->m_name.length, name->m_name.str));
ret= db_update_routine(thd, TYPE_ENUM_PROCEDURE, name, chistics);
if (!ret)
sp_cache_invalidate();
DBUG_RETURN(ret);
}
int
sp_show_create_procedure(THD *thd, sp_name *name)
{
sp_head *sp;
DBUG_ENTER("sp_show_create_procedure");
DBUG_PRINT("enter", ("name: %*s", name->m_name.length, name->m_name.str));
if ((sp= sp_find_procedure(thd, name)))
{
int ret= sp->show_create_procedure(thd);
DBUG_RETURN(ret);
}
DBUG_RETURN(SP_KEY_NOT_FOUND);
}
int
sp_show_status_procedure(THD *thd, const char *wild)
{
int ret;
DBUG_ENTER("sp_show_status_procedure");
ret= db_show_routine_status(thd, TYPE_ENUM_PROCEDURE, wild);
DBUG_RETURN(ret);
}
/*****************************************************************************
FUNCTION
******************************************************************************/
/*
Obtain object representing stored function by its name from
stored functions cache and looking into mysql.proc if needed.
SYNOPSIS
sp_find_function()
thd - thread context
name - name of function
cache_only - if true perform cache-only lookup
(Don't look in mysql.proc).
NOTE
See TODO section for sp_find_procedure().
RETURN VALUE
Non-0 pointer to sp_head object for the function, or
0 - in case of error.
*/
sp_head *
sp_find_function(THD *thd, sp_name *name, bool cache_only)
{
sp_head *sp;
DBUG_ENTER("sp_find_function");
DBUG_PRINT("enter", ("name: %*s", name->m_name.length, name->m_name.str));
if (!(sp= sp_cache_lookup(&thd->sp_func_cache, name)) &&
!cache_only)
{
if (db_find_routine(thd, TYPE_ENUM_FUNCTION, name, &sp) == SP_OK)
sp_cache_insert(&thd->sp_func_cache, sp);
}
DBUG_RETURN(sp);
}
int
sp_create_function(THD *thd, sp_head *sp)
{
int ret;
DBUG_ENTER("sp_create_function");
DBUG_PRINT("enter", ("name: %*s", sp->m_name.length, sp->m_name.str));
ret= db_create_routine(thd, TYPE_ENUM_FUNCTION, sp);
DBUG_RETURN(ret);
}
int
sp_drop_function(THD *thd, sp_name *name)
{
int ret;
DBUG_ENTER("sp_drop_function");
DBUG_PRINT("enter", ("name: %*s", name->m_name.length, name->m_name.str));
ret= db_drop_routine(thd, TYPE_ENUM_FUNCTION, name);
if (!ret)
sp_cache_invalidate();
DBUG_RETURN(ret);
}
int
sp_update_function(THD *thd, sp_name *name, st_sp_chistics *chistics)
{
int ret;
DBUG_ENTER("sp_update_procedure");
DBUG_PRINT("enter", ("name: %*s", name->m_name.length, name->m_name.str));
ret= db_update_routine(thd, TYPE_ENUM_FUNCTION, name, chistics);
if (!ret)
sp_cache_invalidate();
DBUG_RETURN(ret);
}
int
sp_show_create_function(THD *thd, sp_name *name)
{
sp_head *sp;
DBUG_ENTER("sp_show_create_function");
DBUG_PRINT("enter", ("name: %*s", name->m_name.length, name->m_name.str));
if ((sp= sp_find_function(thd, name)))
{
int ret= sp->show_create_function(thd);
DBUG_RETURN(ret);
}
DBUG_RETURN(SP_KEY_NOT_FOUND);
}
int
sp_show_status_function(THD *thd, const char *wild)
{
int ret;
DBUG_ENTER("sp_show_status_function");
ret= db_show_routine_status(thd, TYPE_ENUM_FUNCTION, wild);
DBUG_RETURN(ret);
}
/*
Structure that represents element in the set of stored routines
used by statement or routine.
*/
struct Sroutine_hash_entry;
struct Sroutine_hash_entry
{
/* Set key consisting of one-byte routine type and quoted routine name. */
LEX_STRING key;
/*
Next element in list linking all routines in set. See also comments
for LEX::sroutine/sroutine_list and sp_head::m_sroutines.
*/
Sroutine_hash_entry *next;
};
extern "C" byte* sp_sroutine_key(const byte *ptr, uint *plen, my_bool first)
{
Sroutine_hash_entry *rn= (Sroutine_hash_entry *)ptr;
*plen= rn->key.length;
return (byte *)rn->key.str;
}
/*
Check if
- current statement (the one in thd->lex) needs table prelocking
- first routine in thd->lex->sroutines_list needs to execute its body in
prelocked mode.
SYNOPSIS
sp_get_prelocking_info()
thd Current thread, thd->lex is the statement to be
checked.
need_prelocking OUT TRUE - prelocked mode should be activated
before executing the statement
FALSE - Don't activate prelocking
first_no_prelocking OUT TRUE - Tables used by first routine in
thd->lex->sroutines_list should be
prelocked.
FALSE - Otherwise.
NOTES
This function assumes that for any "CALL proc(...)" statement routines_list
will have 'proc' as first element (it may have several, consider e.g.
"proc(sp_func(...)))". This property is currently guaranted by the parser.
*/
void sp_get_prelocking_info(THD *thd, bool *need_prelocking,
bool *first_no_prelocking)
{
Sroutine_hash_entry *routine;
routine= (Sroutine_hash_entry*)thd->lex->sroutines_list.first;
DBUG_ASSERT(routine);
bool first_is_procedure= (routine->key.str[0] == TYPE_ENUM_PROCEDURE);
*first_no_prelocking= first_is_procedure;
*need_prelocking= !first_is_procedure || test(routine->next);
}
/*
Auxilary function that adds new element to the set of stored routines
used by statement.
SYNOPSIS
add_used_routine()
lex - LEX representing statement
arena - arena in which memory for new element will be allocated
key - key for the hash representing set
NOTES
Will also add element to end of 'LEX::sroutines_list' list.
In case when statement uses stored routines but does not need
prelocking (i.e. it does not use any tables) we will access the
elements of LEX::sroutines set on prepared statement re-execution.
Because of this we have to allocate memory for both hash element
and copy of its key in persistent arena.
TODO
When we will got rid of these accesses on re-executions we will be
able to allocate memory for hash elements in non-persitent arena
and directly use key values from sp_head::m_sroutines sets instead
of making their copies.
RETURN VALUE
TRUE - new element was added.
FALSE - element was not added (because it is already present in the set).
*/
static bool add_used_routine(LEX *lex, Query_arena *arena,
const LEX_STRING *key)
{
if (!hash_search(&lex->sroutines, (byte *)key->str, key->length))
{
Sroutine_hash_entry *rn=
(Sroutine_hash_entry *)arena->alloc(sizeof(Sroutine_hash_entry) +
key->length);
if (!rn) // OOM. Error will be reported using fatal_error().
return FALSE;
rn->key.length= key->length;
rn->key.str= (char *)rn + sizeof(Sroutine_hash_entry);
memcpy(rn->key.str, key->str, key->length);
my_hash_insert(&lex->sroutines, (byte *)rn);
lex->sroutines_list.link_in_list((byte *)rn, (byte **)&rn->next);
return TRUE;
}
return FALSE;
}
/*
Add routine which is explicitly used by statement to the set of stored
routines used by this statement.
SYNOPSIS
sp_add_used_routine()
lex - LEX representing statement
arena - arena in which memory for new element of the set
will be allocated
rt - routine name
rt_type - routine type (one of TYPE_ENUM_PROCEDURE/...)
NOTES
Will also add element to end of 'LEX::sroutines_list' list (and will
take into account that this is explicitly used routine).
To be friendly towards prepared statements one should pass
persistent arena as second argument.
*/
void sp_add_used_routine(LEX *lex, Query_arena *arena,
sp_name *rt, char rt_type)
{
rt->set_routine_type(rt_type);
(void)add_used_routine(lex, arena, &rt->m_sroutines_key);
lex->sroutines_list_own_last= lex->sroutines_list.next;
lex->sroutines_list_own_elements= lex->sroutines_list.elements;
}
/*
Remove routines which are only indirectly used by statement from
the set of routines used by this statement.
SYNOPSIS
sp_remove_not_own_routines()
lex LEX representing statement
*/
void sp_remove_not_own_routines(LEX *lex)
{
Sroutine_hash_entry *not_own_rt, *next_rt;
for (not_own_rt= *(Sroutine_hash_entry **)lex->sroutines_list_own_last;
not_own_rt; not_own_rt= next_rt)
{
/*
It is safe to obtain not_own_rt->next after calling hash_delete() now
but we want to be more future-proof.
*/
next_rt= not_own_rt->next;
hash_delete(&lex->sroutines, (byte *)not_own_rt);
}
*(Sroutine_hash_entry **)lex->sroutines_list_own_last= NULL;
lex->sroutines_list.next= lex->sroutines_list_own_last;
lex->sroutines_list.elements= lex->sroutines_list_own_elements;
}
/*
Merge contents of two hashes representing sets of routines used
by statements or by other routines.
SYNOPSIS
sp_update_sp_used_routines()
dst - hash to which elements should be added
src - hash from which elements merged
NOTE
This procedure won't create new Sroutine_hash_entry objects,
instead it will simply add elements from source to destination
hash. Thus time of life of elements in destination hash becomes
dependant on time of life of elements from source hash. It also
won't touch lists linking elements in source and destination
hashes.
*/
void sp_update_sp_used_routines(HASH *dst, HASH *src)
{
for (uint i=0 ; i < src->records ; i++)
{
Sroutine_hash_entry *rt= (Sroutine_hash_entry *)hash_element(src, i);
if (!hash_search(dst, (byte *)rt->key.str, rt->key.length))
my_hash_insert(dst, (byte *)rt);
}
}
/*
Add contents of hash representing set of routines to the set of
routines used by statement.
SYNOPSIS
sp_update_stmt_used_routines()
thd - thread context
lex - LEX representing statement
src - hash representing set from which routines will be added
NOTE
It will also add elements to end of 'LEX::sroutines_list' list.
*/
static void sp_update_stmt_used_routines(THD *thd, LEX *lex, HASH *src)
{
for (uint i=0 ; i < src->records ; i++)
{
Sroutine_hash_entry *rt= (Sroutine_hash_entry *)hash_element(src, i);
(void)add_used_routine(lex, thd->stmt_arena, &rt->key);
}
}
/*
Add contents of list representing set of routines to the set of
routines used by statement.
SYNOPSIS
sp_update_stmt_used_routines()
thd Thread context
lex LEX representing statement
src List representing set from which routines will be added
NOTE
It will also add elements to end of 'LEX::sroutines_list' list.
*/
static void sp_update_stmt_used_routines(THD *thd, LEX *lex, SQL_LIST *src)
{
for (Sroutine_hash_entry *rt= (Sroutine_hash_entry *)src->first;
rt; rt= rt->next)
(void)add_used_routine(lex, thd->stmt_arena, &rt->key);
}
/*
Cache sub-set of routines used by statement, add tables used by these
routines to statement table list. Do the same for all routines used
by these routines.
SYNOPSIS
sp_cache_routines_and_add_tables_aux()
thd - thread context
lex - LEX representing statement
start - first routine from the list of routines to be cached
(this list defines mentioned sub-set).
first_no_prelock - If true, don't add tables or cache routines used by
the body of the first routine (i.e. *start)
will be executed in non-prelocked mode.
NOTE
If some function is missing this won't be reported here.
Instead this fact will be discovered during query execution.
RETURN VALUE
TRUE - some tables were added
FALSE - no tables were added.
*/
static bool
sp_cache_routines_and_add_tables_aux(THD *thd, LEX *lex,
Sroutine_hash_entry *start,
bool first_no_prelock)
{
bool result= FALSE;
bool first= TRUE;
DBUG_ENTER("sp_cache_routines_and_add_tables_aux");
for (Sroutine_hash_entry *rt= start; rt; rt= rt->next)
{
sp_name name(rt->key.str, rt->key.length);
int type= rt->key.str[0];
sp_head *sp;
if (!(sp= sp_cache_lookup((type == TYPE_ENUM_FUNCTION ?
&thd->sp_func_cache : &thd->sp_proc_cache),
&name)))
{
LEX *oldlex= thd->lex;
LEX *newlex= new st_lex;
thd->lex= newlex;
newlex->current_select= NULL;
name.m_name.str= strchr(name.m_qname.str, '.');
name.m_db.length= name.m_name.str - name.m_qname.str;
name.m_db.str= strmake_root(thd->mem_root, name.m_qname.str,
name.m_db.length);
name.m_name.str+= 1;
name.m_name.length= name.m_qname.length - name.m_db.length - 1;
if (db_find_routine(thd, type, &name, &sp) == SP_OK)
{
if (type == TYPE_ENUM_FUNCTION)
sp_cache_insert(&thd->sp_func_cache, sp);
else
sp_cache_insert(&thd->sp_proc_cache, sp);
}
delete newlex;
thd->lex= oldlex;
}
if (sp)
{
if (!(first && first_no_prelock))
{
sp_update_stmt_used_routines(thd, lex, &sp->m_sroutines);
result|= sp->add_used_tables_to_table_list(thd, &lex->query_tables_last);
}
}
first= FALSE;
}
DBUG_RETURN(result);
}
/*
Cache all routines from the set of used by statement, add tables used
by those routines to statement table list. Do the same for all routines
used by those routines.
SYNOPSIS
sp_cache_routines_and_add_tables()
thd - thread context
lex - LEX representing statement
first_no_prelock - If true, don't add tables or cache routines used by
the body of the first routine (i.e. *start)
RETURN VALUE
TRUE - some tables were added
FALSE - no tables were added.
*/
bool
sp_cache_routines_and_add_tables(THD *thd, LEX *lex, bool first_no_prelock)
{
return sp_cache_routines_and_add_tables_aux(thd, lex,
(Sroutine_hash_entry *)lex->sroutines_list.first,
first_no_prelock);
}
/*
Add all routines used by view to the set of routines used by statement.
Add tables used by those routines to statement table list. Do the same
for all routines used by these routines.
SYNOPSIS
sp_cache_routines_and_add_tables_for_view()
thd - thread context
lex - LEX representing statement
aux_lex - LEX representing view
*/
void
sp_cache_routines_and_add_tables_for_view(THD *thd, LEX *lex, LEX *aux_lex)
{
Sroutine_hash_entry **last_cached_routine_ptr=
(Sroutine_hash_entry **)lex->sroutines_list.next;
sp_update_stmt_used_routines(thd, lex, &aux_lex->sroutines_list);
(void)sp_cache_routines_and_add_tables_aux(thd, lex,
*last_cached_routine_ptr, FALSE);
}
/*
Add triggers for table to the set of routines used by statement.
Add tables used by them to statement table list. Do the same for
all implicitly used routines.
SYNOPSIS
sp_cache_routines_and_add_tables_for_triggers()
thd - thread context
lex - LEX respresenting statement
triggers - triggers of the table
*/
void
sp_cache_routines_and_add_tables_for_triggers(THD *thd, LEX *lex,
Table_triggers_list *triggers)
{
if (add_used_routine(lex, thd->stmt_arena, &triggers->sroutines_key))
{
Sroutine_hash_entry **last_cached_routine_ptr=
(Sroutine_hash_entry **)lex->sroutines_list.next;
for (int i= 0; i < (int)TRG_EVENT_MAX; i++)
{
for (int j= 0; j < (int)TRG_ACTION_MAX; j++)
{
if (triggers->bodies[i][j])
{
(void)triggers->bodies[i][j]->add_used_tables_to_table_list(thd,
&lex->query_tables_last);
sp_update_stmt_used_routines(thd, lex,
&triggers->bodies[i][j]->m_sroutines);
}
}
}
(void)sp_cache_routines_and_add_tables_aux(thd, lex,
*last_cached_routine_ptr,
FALSE);
}
}
/*
* Generates the CREATE... string from the table information.
* Returns TRUE on success, FALSE on (alloc) failure.
*/
static bool
create_string(THD *thd, String *buf,
int type,
sp_name *name,
const char *params, ulong paramslen,
const char *returns, ulong returnslen,
const char *body, ulong bodylen,
st_sp_chistics *chistics)
{
/* Make some room to begin with */
if (buf->alloc(100 + name->m_qname.length + paramslen + returnslen + bodylen +
chistics->comment.length))
return FALSE;
buf->append("CREATE ", 7);
if (type == TYPE_ENUM_FUNCTION)
buf->append("FUNCTION ", 9);
else
buf->append("PROCEDURE ", 10);
append_identifier(thd, buf, name->m_name.str, name->m_name.length);
buf->append('(');
buf->append(params, paramslen);
buf->append(')');
if (type == TYPE_ENUM_FUNCTION)
{
buf->append(" RETURNS ", 9);
buf->append(returns, returnslen);
}
buf->append('\n');
switch (chistics->daccess) {
case SP_NO_SQL:
buf->append(" NO SQL\n");
break;
case SP_READS_SQL_DATA:
buf->append(" READS SQL DATA\n");
break;
case SP_MODIFIES_SQL_DATA:
buf->append(" MODIFIES SQL DATA\n");
break;
case SP_DEFAULT_ACCESS:
case SP_CONTAINS_SQL:
/* Do nothing */
break;
}
if (chistics->detistic)
buf->append(" DETERMINISTIC\n", 18);
if (chistics->suid == SP_IS_NOT_SUID)
buf->append(" SQL SECURITY INVOKER\n", 25);
if (chistics->comment.length)
{
buf->append(" COMMENT ");
append_unescaped(buf, chistics->comment.str, chistics->comment.length);
buf->append('\n');
}
buf->append(body, bodylen);
return TRUE;
}
//
// Utilities...
//
int
sp_use_new_db(THD *thd, char *newdb, char *olddb, uint olddblen,
bool no_access_check, bool *dbchangedp)
{
bool changeit;
DBUG_ENTER("sp_use_new_db");
DBUG_PRINT("enter", ("newdb: %s", newdb));
if (! newdb)
newdb= (char *)"";
if (thd->db && thd->db[0])
{
if (my_strcasecmp(system_charset_info, thd->db, newdb) == 0)
changeit= 0;
else
{
changeit= 1;
strnmov(olddb, thd->db, olddblen);
}
}
else
{ // thd->db empty
if (newdb[0])
changeit= 1;
else
changeit= 0;
olddb[0] = '\0';
}
if (!changeit)
{
*dbchangedp= FALSE;
DBUG_RETURN(0);
}
else
{
int ret= mysql_change_db(thd, newdb, no_access_check);
if (! ret)
*dbchangedp= TRUE;
DBUG_RETURN(ret);
}
}
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