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mariadb/sql/sp.cc
Konstantin Osipov 34b11fb627 Merge with next-mr
2009-11-20 17:18:37 +03:00

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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; version 2 of the License.
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"
#include <my_user.h>
static bool
create_string(THD *thd, String *buf,
int sp_type,
const char *db, ulong dblen,
const char *name, ulong namelen,
const char *params, ulong paramslen,
const char *returns, ulong returnslen,
const char *body, ulong bodylen,
st_sp_chistics *chistics,
const LEX_STRING *definer_user,
const LEX_STRING *definer_host);
static int
db_load_routine(THD *thd, int type, sp_name *name, sp_head **sphp,
ulong sql_mode, const char *params, const char *returns,
const char *body, st_sp_chistics &chistics,
const char *definer, longlong created, longlong modified,
Stored_program_creation_ctx *creation_ctx);
/*
*
* DB storage of Stored PROCEDUREs and FUNCTIONs
*
*/
enum
{
MYSQL_PROC_FIELD_DB = 0,
MYSQL_PROC_FIELD_NAME,
MYSQL_PROC_MYSQL_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_CHARACTER_SET_CLIENT,
MYSQL_PROC_FIELD_COLLATION_CONNECTION,
MYSQL_PROC_FIELD_DB_COLLATION,
MYSQL_PROC_FIELD_BODY_UTF8,
MYSQL_PROC_FIELD_COUNT
};
/*************************************************************************/
/**
Stored_routine_creation_ctx -- creation context of stored routines
(stored procedures and functions).
*/
class Stored_routine_creation_ctx : public Stored_program_creation_ctx,
public Sql_alloc
{
public:
static Stored_routine_creation_ctx *
load_from_db(THD *thd, const sp_name *name, TABLE *proc_tbl);
public:
virtual Stored_program_creation_ctx *clone(MEM_ROOT *mem_root)
{
return new (mem_root) Stored_routine_creation_ctx(m_client_cs,
m_connection_cl,
m_db_cl);
}
protected:
virtual Object_creation_ctx *create_backup_ctx(THD *thd) const
{
DBUG_ENTER("Stored_routine_creation_ctx::create_backup_ctx");
DBUG_RETURN(new Stored_routine_creation_ctx(thd));
}
private:
Stored_routine_creation_ctx(THD *thd)
: Stored_program_creation_ctx(thd)
{ }
Stored_routine_creation_ctx(CHARSET_INFO *client_cs,
CHARSET_INFO *connection_cl,
CHARSET_INFO *db_cl)
: Stored_program_creation_ctx(client_cs, connection_cl, db_cl)
{ }
};
/**************************************************************************
Stored_routine_creation_ctx implementation.
**************************************************************************/
bool load_charset(MEM_ROOT *mem_root,
Field *field,
CHARSET_INFO *dflt_cs,
CHARSET_INFO **cs)
{
String cs_name;
if (get_field(mem_root, field, &cs_name))
{
*cs= dflt_cs;
return TRUE;
}
*cs= get_charset_by_csname(cs_name.c_ptr(), MY_CS_PRIMARY, MYF(0));
if (*cs == NULL)
{
*cs= dflt_cs;
return TRUE;
}
return FALSE;
}
/*************************************************************************/
bool load_collation(MEM_ROOT *mem_root,
Field *field,
CHARSET_INFO *dflt_cl,
CHARSET_INFO **cl)
{
String cl_name;
if (get_field(mem_root, field, &cl_name))
{
*cl= dflt_cl;
return TRUE;
}
*cl= get_charset_by_name(cl_name.c_ptr(), MYF(0));
if (*cl == NULL)
{
*cl= dflt_cl;
return TRUE;
}
return FALSE;
}
/*************************************************************************/
Stored_routine_creation_ctx *
Stored_routine_creation_ctx::load_from_db(THD *thd,
const sp_name *name,
TABLE *proc_tbl)
{
/* Load character set/collation attributes. */
CHARSET_INFO *client_cs;
CHARSET_INFO *connection_cl;
CHARSET_INFO *db_cl;
const char *db_name= thd->strmake(name->m_db.str, name->m_db.length);
const char *sr_name= thd->strmake(name->m_name.str, name->m_name.length);
bool invalid_creation_ctx= FALSE;
if (load_charset(thd->mem_root,
proc_tbl->field[MYSQL_PROC_FIELD_CHARACTER_SET_CLIENT],
thd->variables.character_set_client,
&client_cs))
{
sql_print_warning("Stored routine '%s'.'%s': invalid value "
"in column mysql.proc.character_set_client.",
(const char *) db_name,
(const char *) sr_name);
invalid_creation_ctx= TRUE;
}
if (load_collation(thd->mem_root,
proc_tbl->field[MYSQL_PROC_FIELD_COLLATION_CONNECTION],
thd->variables.collation_connection,
&connection_cl))
{
sql_print_warning("Stored routine '%s'.'%s': invalid value "
"in column mysql.proc.collation_connection.",
(const char *) db_name,
(const char *) sr_name);
invalid_creation_ctx= TRUE;
}
if (load_collation(thd->mem_root,
proc_tbl->field[MYSQL_PROC_FIELD_DB_COLLATION],
NULL,
&db_cl))
{
sql_print_warning("Stored routine '%s'.'%s': invalid value "
"in column mysql.proc.db_collation.",
(const char *) db_name,
(const char *) sr_name);
invalid_creation_ctx= TRUE;
}
if (invalid_creation_ctx)
{
push_warning_printf(thd,
MYSQL_ERROR::WARN_LEVEL_WARN,
ER_SR_INVALID_CREATION_CTX,
ER(ER_SR_INVALID_CREATION_CTX),
(const char *) db_name,
(const char *) sr_name);
}
/*
If we failed to retrieve the database collation, load the default one
from the disk.
*/
if (!db_cl)
db_cl= get_default_db_collation(thd, name->m_db.str);
/* Create the context. */
return new Stored_routine_creation_ctx(client_cs, connection_cl, db_cl);
}
/*************************************************************************/
/**
Open the mysql.proc table for read.
@param thd Thread context
@param 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.
@retval
0 Error
@retval
\# Pointer to TABLE object of mysql.proc
*/
TABLE *open_proc_table_for_read(THD *thd, Open_tables_state *backup)
{
DBUG_ENTER("open_proc_table_for_read");
TABLE_LIST table;
bzero((char*) &table, sizeof(table));
table.db= (char*) "mysql";
table.table_name= table.alias= (char*)"proc";
table.lock_type= TL_READ;
if (!open_system_tables_for_read(thd, &table, backup))
DBUG_RETURN(table.table);
else
DBUG_RETURN(0);
}
/**
Open the mysql.proc table for update.
@param thd Thread context
@note
Table opened with this call should closed using close_thread_tables().
@retval
0 Error
@retval
\# Pointer to TABLE object of mysql.proc
*/
static TABLE *open_proc_table_for_update(THD *thd)
{
DBUG_ENTER("open_proc_table_for_update");
TABLE_LIST table;
bzero((char*) &table, sizeof(table));
table.db= (char*) "mysql";
table.table_name= table.alias= (char*)"proc";
table.lock_type= TL_WRITE;
DBUG_RETURN(open_system_table_for_update(thd, &table));
}
/**
Find row in open mysql.proc table representing stored routine.
@param thd Thread context
@param type Type of routine to find (function or procedure)
@param name Name of routine
@param table TABLE object for open mysql.proc table.
@retval
SP_OK Routine found
@retval
SP_KEY_NOT_FOUND No routine with given name
*/
static int
db_find_routine_aux(THD *thd, int type, sp_name *name, TABLE *table)
{
uchar key[MAX_KEY_LENGTH]; // db, name, optional key length type
DBUG_ENTER("db_find_routine_aux");
DBUG_PRINT("enter", ("type: %d name: %.*s",
type, (int) 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, TRUE);
key_copy(key, table->record[0], table->key_info,
table->key_info->key_length);
if (table->file->index_read_idx_map(table->record[0], 0, key, HA_WHOLE_KEY,
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.
@param thd Thread context
@param type Type of routine (TYPE_ENUM_PROCEDURE/...)
@param name Name of routine
@param 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.
@retval
0 Success
@retval
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)
{
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);
bool saved_time_zone_used= thd->time_zone_used;
ulong sql_mode, saved_mode= thd->variables.sql_mode;
Open_tables_state open_tables_state_backup;
Stored_program_creation_ctx *creation_ctx;
DBUG_ENTER("db_find_routine");
DBUG_PRINT("enter", ("type: %d name: %.*s",
type, (int) 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);
/* Reset sql_mode during data dictionary operations. */
thd->variables.sql_mode= 0;
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;
creation_ctx= Stored_routine_creation_ctx::load_from_db(thd, name, table);
close_system_tables(thd, &open_tables_state_backup);
table= 0;
ret= db_load_routine(thd, type, name, sphp,
sql_mode, params, returns, body, chistics,
definer, created, modified, creation_ctx);
done:
/*
Restore the time zone flag as the timezone usage in proc table
does not affect replication.
*/
thd->time_zone_used= saved_time_zone_used;
if (table)
close_system_tables(thd, &open_tables_state_backup);
thd->variables.sql_mode= saved_mode;
DBUG_RETURN(ret);
}
/**
Silence DEPRECATED SYNTAX warnings when loading a stored procedure
into the cache.
*/
struct Silence_deprecated_warning : public Internal_error_handler
{
public:
virtual bool handle_condition(THD *thd,
uint sql_errno,
const char* sqlstate,
MYSQL_ERROR::enum_warning_level level,
const char* msg,
MYSQL_ERROR ** cond_hdl);
};
bool
Silence_deprecated_warning::handle_condition(
THD *,
uint sql_errno,
const char*,
MYSQL_ERROR::enum_warning_level level,
const char*,
MYSQL_ERROR ** cond_hdl)
{
*cond_hdl= NULL;
if (sql_errno == ER_WARN_DEPRECATED_SYNTAX &&
level == MYSQL_ERROR::WARN_LEVEL_WARN)
return TRUE;
return FALSE;
}
static int
db_load_routine(THD *thd, int type, sp_name *name, sp_head **sphp,
ulong sql_mode, const char *params, const char *returns,
const char *body, st_sp_chistics &chistics,
const char *definer, longlong created, longlong modified,
Stored_program_creation_ctx *creation_ctx)
{
LEX *old_lex= thd->lex, newlex;
String defstr;
char saved_cur_db_name_buf[NAME_LEN+1];
LEX_STRING saved_cur_db_name=
{ saved_cur_db_name_buf, sizeof(saved_cur_db_name_buf) };
bool cur_db_changed;
ulong old_sql_mode= thd->variables.sql_mode;
ha_rows old_select_limit= thd->variables.select_limit;
sp_rcontext *old_spcont= thd->spcont;
Silence_deprecated_warning warning_handler;
char definer_user_name_holder[USERNAME_LENGTH + 1];
LEX_STRING definer_user_name= { definer_user_name_holder,
USERNAME_LENGTH };
char definer_host_name_holder[HOSTNAME_LENGTH + 1];
LEX_STRING definer_host_name= { definer_host_name_holder, HOSTNAME_LENGTH };
int ret;
thd->variables.sql_mode= sql_mode;
thd->variables.select_limit= HA_POS_ERROR;
thd->lex= &newlex;
newlex.current_select= NULL;
parse_user(definer, strlen(definer),
definer_user_name.str, &definer_user_name.length,
definer_host_name.str, &definer_host_name.length);
defstr.set_charset(creation_ctx->get_client_cs());
/*
We have to add DEFINER clause and provide proper routine characterstics in
routine definition statement that we build here to be able to use this
definition for SHOW CREATE PROCEDURE later.
*/
if (!create_string(thd, &defstr,
type,
NULL, 0,
name->m_name.str, name->m_name.length,
params, strlen(params),
returns, strlen(returns),
body, strlen(body),
&chistics, &definer_user_name, &definer_host_name))
{
ret= SP_INTERNAL_ERROR;
goto end;
}
/*
Change the current database (if needed).
TODO: why do we force switch here?
*/
if (mysql_opt_change_db(thd, &name->m_db, &saved_cur_db_name, TRUE,
&cur_db_changed))
{
ret= SP_INTERNAL_ERROR;
goto end;
}
thd->spcont= NULL;
{
Parser_state parser_state(thd, defstr.c_ptr(), defstr.length());
lex_start(thd);
thd->push_internal_handler(&warning_handler);
ret= parse_sql(thd, & parser_state, creation_ctx) || newlex.sphead == NULL;
thd->pop_internal_handler();
/*
Force switching back to the saved current database (if changed),
because it may be NULL. In this case, mysql_change_db() would
generate an error.
*/
if (cur_db_changed && mysql_change_db(thd, &saved_cur_db_name, TRUE))
{
delete newlex.sphead;
ret= SP_INTERNAL_ERROR;
goto end;
}
if (ret)
{
delete newlex.sphead;
ret= SP_PARSE_ERROR;
goto end;
}
*sphp= newlex.sphead;
(*sphp)->set_definer(&definer_user_name, &definer_host_name);
(*sphp)->set_info(created, modified, &chistics, sql_mode);
(*sphp)->set_creation_ctx(creation_ctx);
(*sphp)->optimize();
/*
Not strictly necessary to invoke this method here, since we know
that we've parsed CREATE PROCEDURE/FUNCTION and not an
UPDATE/DELETE/INSERT/REPLACE/LOAD/CREATE TABLE, but we try to
maintain the invariant that this method is called for each
distinct statement, in case its logic is extended with other
types of analyses in future.
*/
newlex.set_trg_event_type_for_tables();
}
end:
lex_end(thd->lex);
thd->spcont= old_spcont;
thd->variables.sql_mode= old_sql_mode;
thd->variables.select_limit= old_select_limit;
thd->lex= old_lex;
return ret;
}
static void
sp_returns_type(THD *thd, String &result, sp_head *sp)
{
TABLE table;
TABLE_SHARE share;
Field *field;
bzero((char*) &table, sizeof(table));
bzero((char*) &share, sizeof(share));
table.in_use= thd;
table.s = &share;
field= sp->create_result_field(0, 0, &table);
field->sql_type(result);
if (field->has_charset())
{
result.append(STRING_WITH_LEN(" CHARSET "));
result.append(field->charset()->csname);
if (!(field->charset()->state & MY_CS_PRIMARY))
{
result.append(STRING_WITH_LEN(" COLLATE "));
result.append(field->charset()->name);
}
}
delete field;
}
/**
Write stored-routine object into mysql.proc.
This operation stores attributes of the stored procedure/function into
the mysql.proc.
@param thd Thread context.
@param type Stored routine type
(TYPE_ENUM_PROCEDURE or TYPE_ENUM_FUNCTION).
@param sp Stored routine object to store.
@note Opens and closes the thread tables. Therefore assumes
that there are no locked tables in this thread at the time of
invocation.
Unlike some other DDL statements, *does* close the tables
in the end, since the call to this function is normally
followed by an implicit grant (sp_grant_privileges())
and this subsequent call opens and closes mysql.procs_priv.
@return Error code. SP_OK is returned on success. Other
SP_ constants are used to indicate about errors.
*/
int
sp_create_routine(THD *thd, int type, sp_head *sp)
{
int ret;
TABLE *table;
char definer[USER_HOST_BUFF_SIZE];
ulong saved_mode= thd->variables.sql_mode;
CHARSET_INFO *db_cs= get_default_db_collation(thd, sp->m_db.str);
enum_check_fields saved_count_cuted_fields;
bool store_failed= FALSE;
DBUG_ENTER("sp_create_routine");
DBUG_PRINT("enter", ("type: %d name: %.*s",type, (int) sp->m_name.length,
sp->m_name.str));
String retstr(64);
DBUG_ASSERT(type == TYPE_ENUM_PROCEDURE ||
type == TYPE_ENUM_FUNCTION);
/* Reset sql_mode during data dictionary operations. */
thd->variables.sql_mode= 0;
/*
This statement will be replicated as a statement, even when using
row-based replication. The flag will be reset at the end of the
statement.
*/
thd->clear_current_stmt_binlog_row_based();
saved_count_cuted_fields= thd->count_cuted_fields;
thd->count_cuted_fields= CHECK_FIELD_WARN;
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
/* NOTE: all needed privilege checks have been already done. */
strxnmov(definer, sizeof(definer)-1, thd->lex->definer->user.str, "@",
thd->lex->definer->host.str, NullS);
if (table->s->fields < MYSQL_PROC_FIELD_COUNT)
{
ret= SP_GET_FIELD_FAILED;
goto done;
}
if (system_charset_info->cset->numchars(system_charset_info,
sp->m_name.str,
sp->m_name.str+sp->m_name.length) >
table->field[MYSQL_PROC_FIELD_NAME]->char_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;
}
store_failed=
table->field[MYSQL_PROC_FIELD_DB]->
store(sp->m_db.str, sp->m_db.length, system_charset_info);
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_NAME]->
store(sp->m_name.str, sp->m_name.length, system_charset_info);
store_failed= store_failed ||
table->field[MYSQL_PROC_MYSQL_TYPE]->
store((longlong)type, TRUE);
store_failed= store_failed ||
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)
{
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_ACCESS]->
store((longlong)sp->m_chistics->daccess, TRUE);
}
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_DETERMINISTIC]->
store((longlong)(sp->m_chistics->detistic ? 1 : 2), TRUE);
if (sp->m_chistics->suid != SP_IS_DEFAULT_SUID)
{
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_SECURITY_TYPE]->
store((longlong)sp->m_chistics->suid, TRUE);
}
store_failed= store_failed ||
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)
{
sp_returns_type(thd, retstr, sp);
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_RETURNS]->
store(retstr.ptr(), retstr.length(), system_charset_info);
}
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_BODY]->
store(sp->m_body.str, sp->m_body.length, system_charset_info);
store_failed= store_failed ||
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();
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_SQL_MODE]->
store((longlong)saved_mode, TRUE);
if (sp->m_chistics->comment.str)
{
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_COMMENT]->
store(sp->m_chistics->comment.str, sp->m_chistics->comment.length,
system_charset_info);
}
if ((sp->m_type == TYPE_ENUM_FUNCTION) &&
!trust_function_creators && mysql_bin_log.is_open())
{
if (!sp->m_chistics->detistic)
{
/*
Note that this test is not perfect; 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->security_ctx->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;
}
}
table->field[MYSQL_PROC_FIELD_CHARACTER_SET_CLIENT]->set_notnull();
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_CHARACTER_SET_CLIENT]->store(
thd->charset()->csname,
strlen(thd->charset()->csname),
system_charset_info);
table->field[MYSQL_PROC_FIELD_COLLATION_CONNECTION]->set_notnull();
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_COLLATION_CONNECTION]->store(
thd->variables.collation_connection->name,
strlen(thd->variables.collation_connection->name),
system_charset_info);
table->field[MYSQL_PROC_FIELD_DB_COLLATION]->set_notnull();
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_DB_COLLATION]->store(
db_cs->name, strlen(db_cs->name), system_charset_info);
table->field[MYSQL_PROC_FIELD_BODY_UTF8]->set_notnull();
store_failed= store_failed ||
table->field[MYSQL_PROC_FIELD_BODY_UTF8]->store(
sp->m_body_utf8.str, sp->m_body_utf8.length, system_charset_info);
if (store_failed)
{
ret= SP_FLD_STORE_FAILED;
goto done;
}
ret= SP_OK;
if (table->file->ha_write_row(table->record[0]))
ret= SP_WRITE_ROW_FAILED;
else if (mysql_bin_log.is_open())
{
thd->clear_error();
String log_query;
log_query.set_charset(system_charset_info);
if (!create_string(thd, &log_query,
sp->m_type,
(sp->m_explicit_name ? sp->m_db.str : NULL),
(sp->m_explicit_name ? sp->m_db.length : 0),
sp->m_name.str, sp->m_name.length,
sp->m_params.str, sp->m_params.length,
retstr.c_ptr(), retstr.length(),
sp->m_body.str, sp->m_body.length,
sp->m_chistics, &(thd->lex->definer->user),
&(thd->lex->definer->host)))
{
ret= SP_INTERNAL_ERROR;
goto done;
}
/* restore sql_mode when binloging */
thd->variables.sql_mode= saved_mode;
/* Such a statement can always go directly to binlog, no trans cache */
thd->binlog_query(THD::MYSQL_QUERY_TYPE,
log_query.c_ptr(), log_query.length(),
FALSE, FALSE, 0);
thd->variables.sql_mode= 0;
}
}
done:
thd->count_cuted_fields= saved_count_cuted_fields;
thd->variables.sql_mode= saved_mode;
close_thread_tables(thd);
DBUG_RETURN(ret);
}
/**
Delete the record for the stored routine object from mysql.proc.
The operation deletes the record for the stored routine specified by name
from the mysql.proc table and invalidates the stored-routine cache.
@param thd Thread context.
@param type Stored routine type
(TYPE_ENUM_PROCEDURE or TYPE_ENUM_FUNCTION)
@param name Stored routine name.
@return Error code. SP_OK is returned on success. Other SP_ constants are
used to indicate about errors.
*/
int
sp_drop_routine(THD *thd, int type, sp_name *name)
{
TABLE *table;
int ret;
DBUG_ENTER("sp_drop_routine");
DBUG_PRINT("enter", ("type: %d name: %.*s",
type, (int) name->m_name.length, name->m_name.str));
DBUG_ASSERT(type == TYPE_ENUM_PROCEDURE ||
type == TYPE_ENUM_FUNCTION);
/*
This statement will be replicated as a statement, even when using
row-based replication. The flag will be reset at the end of the
statement.
*/
thd->clear_current_stmt_binlog_row_based();
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->ha_delete_row(table->record[0]))
ret= SP_DELETE_ROW_FAILED;
}
if (ret == SP_OK)
{
write_bin_log(thd, TRUE, thd->query(), thd->query_length());
sp_cache_invalidate();
}
close_thread_tables(thd);
DBUG_RETURN(ret);
}
/**
Find and updated the record for the stored routine object in mysql.proc.
The operation finds the record for the stored routine specified by name
in the mysql.proc table and updates it with new attributes. After
successful update, the cache is invalidated.
@param thd Thread context.
@param type Stored routine type
(TYPE_ENUM_PROCEDURE or TYPE_ENUM_FUNCTION)
@param name Stored routine name.
@param chistics New values of stored routine attributes to write.
@return Error code. SP_OK is returned on success. Other SP_ constants are
used to indicate about errors.
*/
int
sp_update_routine(THD *thd, int type, sp_name *name, st_sp_chistics *chistics)
{
TABLE *table;
int ret;
DBUG_ENTER("sp_update_routine");
DBUG_PRINT("enter", ("type: %d name: %.*s",
type, (int) name->m_name.length, name->m_name.str));
DBUG_ASSERT(type == TYPE_ENUM_PROCEDURE ||
type == TYPE_ENUM_FUNCTION);
/*
This statement will be replicated as a statement, even when using
row-based replication. The flag will be reset at the end of the
statement.
*/
thd->clear_current_stmt_binlog_row_based();
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, TRUE);
if (chistics->daccess != SP_DEFAULT_ACCESS)
table->field[MYSQL_PROC_FIELD_ACCESS]->
store((longlong)chistics->daccess, TRUE);
if (chistics->comment.str)
table->field[MYSQL_PROC_FIELD_COMMENT]->store(chistics->comment.str,
chistics->comment.length,
system_charset_info);
if ((ret= table->file->ha_update_row(table->record[1],table->record[0])) &&
ret != HA_ERR_RECORD_IS_THE_SAME)
ret= SP_WRITE_ROW_FAILED;
else
ret= 0;
}
if (ret == SP_OK)
{
write_bin_log(thd, TRUE, thd->query(), thd->query_length());
sp_cache_invalidate();
}
close_thread_tables(thd);
DBUG_RETURN(ret);
}
/**
Drop all routines in database 'db'
@note Close the thread tables, the calling code might want to
delete from other system tables afterwards.
*/
int
sp_drop_db_routines(THD *thd, char *db)
{
TABLE *table;
int ret;
uint key_len;
DBUG_ENTER("sp_drop_db_routines");
DBUG_PRINT("enter", ("db: %s", db));
ret= SP_OPEN_TABLE_FAILED;
if (!(table= open_proc_table_for_update(thd)))
goto err;
table->field[MYSQL_PROC_FIELD_DB]->store(db, strlen(db), system_charset_info);
key_len= table->key_info->key_part[0].store_length;
ret= SP_OK;
table->file->ha_index_init(0, 1);
if (! table->file->index_read_map(table->record[0],
(uchar *)table->field[MYSQL_PROC_FIELD_DB]->ptr,
(key_part_map)1, HA_READ_KEY_EXACT))
{
int nxtres;
bool deleted= FALSE;
do
{
if (! table->file->ha_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],
(uchar *)table->field[MYSQL_PROC_FIELD_DB]->ptr,
key_len)));
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);
}
/**
Implement SHOW CREATE statement for stored routines.
The operation finds the stored routine object specified by name and then
calls sp_head::show_create_routine() for the object.
@param thd Thread context.
@param type Stored routine type
(TYPE_ENUM_PROCEDURE or TYPE_ENUM_FUNCTION)
@param name Stored routine name.
@return Error status.
@retval FALSE on success
@retval TRUE on error
*/
bool
sp_show_create_routine(THD *thd, int type, sp_name *name)
{
bool err_status= TRUE;
sp_head *sp;
sp_cache **cache = type == TYPE_ENUM_PROCEDURE ?
&thd->sp_proc_cache : &thd->sp_func_cache;
DBUG_ENTER("sp_show_create_routine");
DBUG_PRINT("enter", ("name: %.*s",
(int) name->m_name.length,
name->m_name.str));
DBUG_ASSERT(type == TYPE_ENUM_PROCEDURE ||
type == TYPE_ENUM_FUNCTION);
if (type == TYPE_ENUM_PROCEDURE)
{
/*
SHOW CREATE PROCEDURE may require two instances of one sp_head
object when SHOW CREATE PROCEDURE is called for the procedure that
is being executed. Basically, there is no actual recursion, so we
increase the recursion limit for this statement (kind of hack).
SHOW CREATE FUNCTION does not require this because SHOW CREATE
statements are prohibitted within stored functions.
*/
thd->variables.max_sp_recursion_depth++;
}
if ((sp= sp_find_routine(thd, type, name, cache, FALSE)))
err_status= sp->show_create_routine(thd, type);
if (type == TYPE_ENUM_PROCEDURE)
thd->variables.max_sp_recursion_depth--;
DBUG_RETURN(err_status);
}
/**
Obtain object representing stored procedure/function by its name from
stored procedures cache and looking into mysql.proc if needed.
@param thd thread context
@param type type of object (TYPE_ENUM_FUNCTION or TYPE_ENUM_PROCEDURE)
@param name name of procedure
@param cp hash to look routine in
@param cache_only if true perform cache-only lookup
(Don't look in mysql.proc).
@retval
NonNULL pointer to sp_head object for the procedure
@retval
NULL in case of error.
*/
sp_head *
sp_find_routine(THD *thd, int type, sp_name *name, sp_cache **cp,
bool cache_only)
{
sp_head *sp;
ulong depth= (type == TYPE_ENUM_PROCEDURE ?
thd->variables.max_sp_recursion_depth :
0);
DBUG_ENTER("sp_find_routine");
DBUG_PRINT("enter", ("name: %.*s.%.*s type: %d cache only %d",
(int) name->m_db.length, name->m_db.str,
(int) name->m_name.length, name->m_name.str,
type, cache_only));
if ((sp= sp_cache_lookup(cp, name)))
{
ulong level;
sp_head *new_sp;
const char *returns= "";
char definer[USER_HOST_BUFF_SIZE];
/*
String buffer for RETURNS data type must have system charset;
64 -- size of "returns" column of mysql.proc.
*/
String retstr(64);
DBUG_PRINT("info", ("found: 0x%lx", (ulong)sp));
if (sp->m_first_free_instance)
{
DBUG_PRINT("info", ("first free: 0x%lx level: %lu flags %x",
(ulong)sp->m_first_free_instance,
sp->m_first_free_instance->m_recursion_level,
sp->m_first_free_instance->m_flags));
DBUG_ASSERT(!(sp->m_first_free_instance->m_flags & sp_head::IS_INVOKED));
if (sp->m_first_free_instance->m_recursion_level > depth)
{
sp->recursion_level_error(thd);
DBUG_RETURN(0);
}
DBUG_RETURN(sp->m_first_free_instance);
}
/*
Actually depth could be +1 than the actual value in case a SP calls
SHOW CREATE PROCEDURE. Hence, the linked list could hold up to one more
instance.
*/
level= sp->m_last_cached_sp->m_recursion_level + 1;
if (level > depth)
{
sp->recursion_level_error(thd);
DBUG_RETURN(0);
}
strxmov(definer, sp->m_definer_user.str, "@",
sp->m_definer_host.str, NullS);
if (type == TYPE_ENUM_FUNCTION)
{
sp_returns_type(thd, retstr, sp);
returns= retstr.ptr();
}
if (db_load_routine(thd, type, name, &new_sp,
sp->m_sql_mode, sp->m_params.str, returns,
sp->m_body.str, *sp->m_chistics, definer,
sp->m_created, sp->m_modified,
sp->get_creation_ctx()) == SP_OK)
{
sp->m_last_cached_sp->m_next_cached_sp= new_sp;
new_sp->m_recursion_level= level;
new_sp->m_first_instance= sp;
sp->m_last_cached_sp= sp->m_first_free_instance= new_sp;
DBUG_PRINT("info", ("added level: 0x%lx, level: %lu, flags %x",
(ulong)new_sp, new_sp->m_recursion_level,
new_sp->m_flags));
DBUG_RETURN(new_sp);
}
DBUG_RETURN(0);
}
if (!cache_only)
{
if (db_find_routine(thd, type, name, &sp) == SP_OK)
{
sp_cache_insert(cp, sp);
DBUG_PRINT("info", ("added new: 0x%lx, level: %lu, flags %x",
(ulong)sp, sp->m_recursion_level,
sp->m_flags));
}
}
DBUG_RETURN(sp);
}
/**
This is used by sql_acl.cc:mysql_routine_grant() and is used to find
the routines in 'routines'.
@param thd Thread handler
@param routines List of needles in the hay stack
@param any Any of the needles are good enough
@return
@retval FALSE Found.
@retval TRUE Not found
*/
bool
sp_exist_routines(THD *thd, TABLE_LIST *routines, bool any)
{
TABLE_LIST *routine;
bool sp_object_found;
DBUG_ENTER("sp_exists_routine");
for (routine= routines; routine; routine= routine->next_global)
{
sp_name *name;
LEX_STRING lex_db;
LEX_STRING lex_name;
lex_db.length= strlen(routine->db);
lex_name.length= strlen(routine->table_name);
lex_db.str= thd->strmake(routine->db, lex_db.length);
lex_name.str= thd->strmake(routine->table_name, lex_name.length);
name= new sp_name(lex_db, lex_name, true);
name->init_qname(thd);
sp_object_found= sp_find_routine(thd, TYPE_ENUM_PROCEDURE, name,
&thd->sp_proc_cache, FALSE) != NULL ||
sp_find_routine(thd, TYPE_ENUM_FUNCTION, name,
&thd->sp_func_cache, FALSE) != NULL;
thd->warning_info->clear_warning_info(thd->query_id);
if (sp_object_found)
{
if (any)
break;
}
else if (!any)
{
my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "FUNCTION or PROCEDURE",
routine->table_name);
DBUG_RETURN(TRUE);
}
}
DBUG_RETURN(FALSE);
}
/**
Check if a routine exists in the mysql.proc table, without actually
parsing the definition. (Used for dropping).
@param thd thread context
@param name name of procedure
@retval
0 Success
@retval
non-0 Error; SP_OPEN_TABLE_FAILED or SP_KEY_NOT_FOUND
*/
int
sp_routine_exists_in_table(THD *thd, int type, sp_name *name)
{
TABLE *table;
int ret;
Open_tables_state open_tables_state_backup;
if (!(table= open_proc_table_for_read(thd, &open_tables_state_backup)))
ret= SP_OPEN_TABLE_FAILED;
else
{
if ((ret= db_find_routine_aux(thd, type, name, table)) != SP_OK)
ret= SP_KEY_NOT_FOUND;
close_system_tables(thd, &open_tables_state_backup);
}
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;
/**
Uppermost view which directly or indirectly uses this routine.
0 if routine is not used in view. Note that it also can be 0 if
statement uses routine both via view and directly.
*/
TABLE_LIST *belong_to_view;
};
extern "C" uchar* sp_sroutine_key(const uchar *ptr, size_t *plen,
my_bool first)
{
Sroutine_hash_entry *rn= (Sroutine_hash_entry *)ptr;
*plen= rn->key.length;
return (uchar *)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.
@param thd Current thread, thd->lex is the statement to be
checked.
@param[out] need_prelocking TRUE - prelocked mode should be activated
before executing the statement;
FALSE - Don't activate prelocking
@param[out] first_no_prelocking TRUE - Tables used by first routine in
thd->lex->sroutines_list should be
prelocked. FALSE - Otherwise.
@note
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.
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.
@param lex LEX representing statement
@param arena Arena in which memory for new element will be
allocated
@param key Key for the hash representing set
@param belong_to_view Uppermost view which uses this routine
(0 if routine is not used by view)
@note
Will also add element to end of 'LEX::sroutines_list' list.
@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.
@retval
TRUE new element was added.
@retval
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,
TABLE_LIST *belong_to_view)
{
my_hash_init_opt(&lex->sroutines, system_charset_info,
Query_tables_list::START_SROUTINES_HASH_SIZE,
0, 0, sp_sroutine_key, 0, 0);
if (!my_hash_search(&lex->sroutines, (uchar *)key->str, key->length))
{
Sroutine_hash_entry *rn=
(Sroutine_hash_entry *)arena->alloc(sizeof(Sroutine_hash_entry) +
key->length + 1);
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 + 1);
my_hash_insert(&lex->sroutines, (uchar *)rn);
lex->sroutines_list.link_in_list((uchar *)rn, (uchar **)&rn->next);
rn->belong_to_view= belong_to_view;
return TRUE;
}
return FALSE;
}
/**
Add routine which is explicitly used by statement to the set of stored
routines used by this statement.
To be friendly towards prepared statements one should pass
persistent arena as second argument.
@param lex LEX representing statement
@param arena arena in which memory for new element of the set
will be allocated
@param rt routine name
@param rt_type routine type (one of TYPE_ENUM_PROCEDURE/...)
@note
Will also add element to end of 'LEX::sroutines_list' list (and will
take into account that this is explicitly used routine).
*/
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, 0);
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.
@param 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;
my_hash_delete(&lex->sroutines, (uchar *)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.
@param dst hash to which elements should be added
@param 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 *)my_hash_element(src, i);
if (!my_hash_search(dst, (uchar *)rt->key.str, rt->key.length))
my_hash_insert(dst, (uchar *)rt);
}
}
/**
Add contents of hash representing set of routines to the set of
routines used by statement.
@param thd Thread context
@param lex LEX representing statement
@param src Hash representing set from which routines will
be added
@param belong_to_view Uppermost view which uses these routines, 0 if none
@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,
TABLE_LIST *belong_to_view)
{
for (uint i=0 ; i < src->records ; i++)
{
Sroutine_hash_entry *rt= (Sroutine_hash_entry *)my_hash_element(src, i);
(void)add_used_routine(lex, thd->stmt_arena, &rt->key, belong_to_view);
}
}
/**
Add contents of list representing set of routines to the set of
routines used by statement.
@param thd Thread context
@param lex LEX representing statement
@param src List representing set from which routines will
be added
@param belong_to_view Uppermost view which uses these routines, 0 if none
@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,
TABLE_LIST *belong_to_view)
{
for (Sroutine_hash_entry *rt= (Sroutine_hash_entry *)src->first;
rt; rt= rt->next)
(void)add_used_routine(lex, thd->stmt_arena, &rt->key, belong_to_view);
}
/**
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.
@param thd thread context
@param lex LEX representing statement
@param start first routine from the list of routines to be cached
(this list defines mentioned sub-set).
@param 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.
@param tabs_changed Set to TRUE some tables were added, FALSE otherwise
@note
If some function is missing this won't be reported here.
Instead this fact will be discovered during query execution.
@retval
0 success
@retval
non-0 failure
*/
static int
sp_cache_routines_and_add_tables_aux(THD *thd, LEX *lex,
Sroutine_hash_entry *start,
bool first_no_prelock)
{
int ret= 0;
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(thd, 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)))
{
switch ((ret= db_find_routine(thd, type, &name, &sp)))
{
case SP_OK:
{
if (type == TYPE_ENUM_FUNCTION)
sp_cache_insert(&thd->sp_func_cache, sp);
else
sp_cache_insert(&thd->sp_proc_cache, sp);
}
break;
case SP_KEY_NOT_FOUND:
ret= SP_OK;
break;
default:
/* Query might have been killed, don't set error. */
if (thd->killed)
break;
/*
Any error when loading an existing routine is either some problem
with the mysql.proc table, or a parse error because the contents
has been tampered with (in which case we clear that error).
*/
if (ret == SP_PARSE_ERROR)
thd->clear_error();
/*
If we cleared the parse error, or when db_find_routine() flagged
an error with it's return value without calling my_error(), we
set the generic "mysql.proc table corrupt" error here.
*/
if (! thd->is_error())
{
/*
SP allows full NAME_LEN chars thus he have to allocate enough
size in bytes. Otherwise there is stack overrun could happen
if multibyte sequence is `name`. `db` is still safe because the
rest of the server checks agains NAME_LEN bytes and not chars.
Hence, the overrun happens only if the name is in length > 32 and
uses multibyte (cyrillic, greek, etc.)
*/
char n[NAME_LEN*2+2];
/* m_qname.str is not always \0 terminated */
memcpy(n, name.m_qname.str, name.m_qname.length);
n[name.m_qname.length]= '\0';
my_error(ER_SP_PROC_TABLE_CORRUPT, MYF(0), n, ret);
}
break;
}
}
if (sp)
{
if (!(first && first_no_prelock))
{
sp_update_stmt_used_routines(thd, lex, &sp->m_sroutines,
rt->belong_to_view);
(void)sp->add_used_tables_to_table_list(thd, &lex->query_tables_last,
rt->belong_to_view);
}
sp->propagate_attributes(lex);
}
first= FALSE;
}
DBUG_RETURN(ret);
}
/**
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.
@param thd thread context
@param lex LEX representing statement
@param first_no_prelock If true, don't add tables or cache routines used by
the body of the first routine (i.e. *start)
@retval
0 success
@retval
non-0 failure
*/
int
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.
@param thd Thread context
@param lex LEX representing statement
@param view Table list element representing view
@retval
0 success
@retval
non-0 failure
*/
int
sp_cache_routines_and_add_tables_for_view(THD *thd, LEX *lex, TABLE_LIST *view)
{
Sroutine_hash_entry **last_cached_routine_ptr=
(Sroutine_hash_entry **)lex->sroutines_list.next;
sp_update_stmt_used_routines(thd, lex, &view->view->sroutines_list,
view->top_table());
return 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.
@param thd thread context
@param lex LEX respresenting statement
@param table Table list element for table with trigger
@retval
0 success
@retval
non-0 failure
*/
int
sp_cache_routines_and_add_tables_for_triggers(THD *thd, LEX *lex,
TABLE_LIST *table)
{
int ret= 0;
Sroutine_hash_entry **last_cached_routine_ptr=
(Sroutine_hash_entry **)lex->sroutines_list.next;
if (static_cast<int>(table->lock_type) >=
static_cast<int>(TL_WRITE_ALLOW_WRITE))
{
for (int i= 0; i < (int)TRG_EVENT_MAX; i++)
{
if (table->trg_event_map &
static_cast<uint8>(1 << static_cast<int>(i)))
{
for (int j= 0; j < (int)TRG_ACTION_MAX; j++)
{
/* We can have only one trigger per action type currently */
sp_head *trigger= table->table->triggers->bodies[i][j];
if (trigger &&
add_used_routine(lex, thd->stmt_arena, &trigger->m_sroutines_key,
table->belong_to_view))
{
trigger->add_used_tables_to_table_list(thd, &lex->query_tables_last,
table->belong_to_view);
trigger->propagate_attributes(lex);
sp_update_stmt_used_routines(thd, lex,
&trigger->m_sroutines,
table->belong_to_view);
}
}
}
}
}
ret= sp_cache_routines_and_add_tables_aux(thd, lex,
*last_cached_routine_ptr,
FALSE);
return ret;
}
/**
Generates the CREATE... string from the table information.
@return
Returns TRUE on success, FALSE on (alloc) failure.
*/
static bool
create_string(THD *thd, String *buf,
int type,
const char *db, ulong dblen,
const char *name, ulong namelen,
const char *params, ulong paramslen,
const char *returns, ulong returnslen,
const char *body, ulong bodylen,
st_sp_chistics *chistics,
const LEX_STRING *definer_user,
const LEX_STRING *definer_host)
{
/* Make some room to begin with */
if (buf->alloc(100 + dblen + 1 + namelen + paramslen + returnslen + bodylen +
chistics->comment.length + 10 /* length of " DEFINER= "*/ +
USER_HOST_BUFF_SIZE))
return FALSE;
buf->append(STRING_WITH_LEN("CREATE "));
append_definer(thd, buf, definer_user, definer_host);
if (type == TYPE_ENUM_FUNCTION)
buf->append(STRING_WITH_LEN("FUNCTION "));
else
buf->append(STRING_WITH_LEN("PROCEDURE "));
if (dblen > 0)
{
append_identifier(thd, buf, db, dblen);
buf->append('.');
}
append_identifier(thd, buf, name, namelen);
buf->append('(');
buf->append(params, paramslen);
buf->append(')');
if (type == TYPE_ENUM_FUNCTION)
{
buf->append(STRING_WITH_LEN(" RETURNS "));
buf->append(returns, returnslen);
}
buf->append('\n');
switch (chistics->daccess) {
case SP_NO_SQL:
buf->append(STRING_WITH_LEN(" NO SQL\n"));
break;
case SP_READS_SQL_DATA:
buf->append(STRING_WITH_LEN(" READS SQL DATA\n"));
break;
case SP_MODIFIES_SQL_DATA:
buf->append(STRING_WITH_LEN(" MODIFIES SQL DATA\n"));
break;
case SP_DEFAULT_ACCESS:
case SP_CONTAINS_SQL:
/* Do nothing */
break;
}
if (chistics->detistic)
buf->append(STRING_WITH_LEN(" DETERMINISTIC\n"));
if (chistics->suid == SP_IS_NOT_SUID)
buf->append(STRING_WITH_LEN(" SQL SECURITY INVOKER\n"));
if (chistics->comment.length)
{
buf->append(STRING_WITH_LEN(" COMMENT "));
append_unescaped(buf, chistics->comment.str, chistics->comment.length);
buf->append('\n');
}
buf->append(body, bodylen);
return TRUE;
}
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