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Enable support of access to tables from triggers. Thus fix bug #8406 "Triggers 

crash if referencing a table" and several other related bugs.
Fix for bug #11834 "Re-execution of prepared statement with dropped function
crashes server." which was spotted during work on previous bugs.

Also couple of nice cleanups:
- Replaced two separate hashes for stored routines used by statement with one.
- Now instead of doing one pass through all routines used in statement for
  caching them and then doing another pass for adding their tables to table
  list, we do only one pass during which do both things.


mysql-test/r/sp-error.result:
  Added test for bug #11834 "Re-execution of prepared statement with dropped
  function crashes server" also covering handling of prepared statements
  which use stored functions but does not require prelocking.
mysql-test/r/sp.result:
  Updated test for LOCK TABLES with views in table list.
  (Old version of statement used in this test will work ok now, since prelocking
   algorithm was tuned and will lock only one multi-set of tables for each routine
   even if this routine is used in several different views).
mysql-test/r/trigger.result:
  Added several tests for triggers using tables.
mysql-test/t/sp-error.test:
  Added test for bug #11834 "Re-execution of prepared statement with dropped
  function crashes server" also covering handling of prepared statements
  which use stored functions but does not require prelocking.
mysql-test/t/sp.test:
  Updated comment about recursive views to reflect current situation.
  Updated test for LOCK TABLES with views in table list.
  (Old version of statement used in this test will work ok now, since prelocking
   algorithm was tuned and will lock only one multi-set of tables for each routine
   even if this routine is used in several different views).
mysql-test/t/trigger.test:
  Added several tests for triggers using tables.
sql/item_func.cc:
  Item_func_sp::cleanup():
    By next statement execution stored function can be dropped or altered so
    we can't assume that sp_head object for it will be still valid.
sql/sp.cc:
  - Added Sroutine_hash_entry structure that represents element in the set of
    stored routines used by statement or routine. We can't as before use
    LEX_STRING for this purprose because we want link all elements of this set
    in list.
  - Replaced sp_add_to_hash() with sp_add_used_routine() which takes into account
    that now we use one hash for stored routines used by statement instead of two
    and which mantains list linking all elelemnts in this hash.
  - Renamed sp_merge_hash() to sp_update_sp_used_routines().
  - Introduced sp_update_stmt_used_routines() for adding elements to the set of
    routines used by statement from another similar set for statement or routine.
    This function will also mantain list linking elements of destination set.
  - Now instead of one sp_cache_routines() function we have family of 
    sp_cache_routines_and_add_tables() functions which are also responsible for
    adding tables used by routines being cached to statement table list. Nice
    optimization - thanks to list linking all elements in the hash of routines
    used by statement we don't need to perform several iterations over this hash
    (as it was before in cases when we have added new elements to it).
sql/sp.h:
  Added declarations of functions used for manipulations with set (hash) of stored
  routines used by statement.
sql/sp_head.cc:
  sp_name::init_qname():
    Now sp_name also holds key identifying routine in the set (hash) of
    stored routines used by statement. 
  sp_head:
    Instead of two separate hashes sp_funs/m_spprocs representing sets of stored
    routines used by this routine we use one hash - m_sroutines. 
  sp_instr_set_trigger_field:
    Added support for subqueries in assignments to row accessors in triggers.
  Removed definition of sp_add_sp_tables_to_table_list() and auxilary functions 
  since now we don't have separate stage on which we add tables used by routines
  used by statement to table list for prelocking. We do it on the same stage as
  we load those routines in SP cache. So all this functionality moved to
  sp_cache_routines_and_add_tables() family of functions.
sql/sp_head.h:
  sp_name:
    Now this class also holds key identifying routine in the set (hash) of stored
    routines used by statement. 
  sp_head:
    Instead of two separate hashes sp_funs/m_spprocs representing sets of stored
    routines used by this routine we use one hash - m_sroutines. 
  sp_instr_set_trigger_field:
    Added support for subqueries in assignments to row accessors in triggers.
  Removed declaration of sp_add_sp_tables_to_table_list() since now we don't have
  separate stage on which we add tables used by routines used by statement to
  table list for prelocking. We do it on the same stage as we load those routines
  in SP cache.
sql/sql_base.cc:
  open_tables():
  - LEX::spfuns/spprocs hashes were replaced with one LEX::sroutines hash.
  - Now instead of doing one pass through all routines used in statement for
    caching them and then doing another pass for adding their tables to table
    list, we do only one pass during which do both things. It is easy to do
    since all routines in the set of routines used by statement are linked in
    the list. This also allows us to calculate table list for prelocking more
    precisely.
  - Now triggers properly inform prelocking algorithm about tables they use.
sql/sql_lex.cc:
  lex_start():
    Replaced LEX::spfuns/spprocs with with one LEX::sroutines hash.
    Added LEX::sroutines_list list linking all elements in this hash.
  st_lex::st_lex():
    Moved definition of LEX constructor to sql_lex.cc file to be able
    use sp_sroutine_key declaration from sp.h in it.
sql/sql_lex.h:
  LEX:
    Replaced two separate hashes for stored routines used by statement with one.
    Added list linking all elements in this hash to be able to iterate through all
    elements and add new elements to this hash at the same time.
    Moved constructor definition to sql_lex.cc.
sql/sql_parse.cc:
  mysql_execute_command():
    Replaced LEX::spfuns/spprocs with one LEX::sroutines hash.
sql/sql_trigger.cc:
  Added missing GNU GPL notice.
  Table_triggers_list::check_n_load()
    Added initialization of sroutines_key which stores key representing
    triggers of this table in the set (hash) of routines used by this statement.
sql/sql_trigger.h:
  Added missing GNU GPL notice.
  Table_triggers_list:
    Added sroutines_key member to store key representing triggers of this
    table in the set (hash) of routines used by this statement.
    Declared sp_cache_routines_and_add_tables_for_triggers() as friend since
    it needs access to sroutines_key and trigger bodies.
sql/sql_yacc.yy:
  - Now we use sp_add_used_routine() instead of sp_add_to_hash() for adding
    elements to the set of stored routines used in statement.
  - Enabled support of subqueries as right sides in assignments to triggers' row
    accessors.
parent 54969a14
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Showing with 664 additions and 252 deletions
mysql-test/r/sp-error.result
View file @ f64f74cb
......@@ -686,3 +686,19 @@ ERROR 0A000: EXECUTE is not allowed in stored procedures
create function f() returns int begin execute stmt;
ERROR 0A000: EXECUTE is not allowed in stored procedures
deallocate prepare stmt;
drop function if exists bug11834_1;
drop function if exists bug11834_2;
create function bug11834_1() returns int return 10;
create function bug11834_2() returns int return bug11834_1();
prepare stmt from "select bug11834_2()";
execute stmt;
bug11834_2()
10
execute stmt;
bug11834_2()
10
drop function bug11834_1;
execute stmt;
ERROR 42000: FUNCTION test.bug11834_1 does not exist
deallocate prepare stmt;
drop function bug11834_2;
mysql-test/r/sp.result
View file @ f64f74cb
......@@ -1229,7 +1229,7 @@ a
select * from v1|
a
3
select * from v1, v2|
select * from v1, t1|
ERROR HY000: Table 't1' was not locked with LOCK TABLES
select f4()|
ERROR HY000: Table 't2' was not locked with LOCK TABLES
......
mysql-test/r/trigger.result
View file @ f64f74cb
drop table if exists t1, t2;
drop table if exists t1, t2, t3;
drop view if exists v1;
drop database if exists mysqltest;
drop function if exists f1;
create table t1 (i int);
create trigger trg before insert on t1 for each row set @a:=1;
set @a:=0;
......@@ -182,6 +183,96 @@ select @log;
@log
(BEFORE_INSERT: new=(id=1, data=5))(BEFORE_UPDATE: old=(id=1, data=4) new=(id=1, data=6))(AFTER_UPDATE: old=(id=1, data=4) new=(id=1, data=6))(BEFORE_INSERT: new=(id=3, data=3))(AFTER_INSERT: new=(id=3, data=3))
drop table t1;
create table t1 (id int primary key, data varchar(10), fk int);
create table t2 (event varchar(100));
create table t3 (id int primary key);
create trigger t1_ai after insert on t1 for each row
insert into t2 values (concat("INSERT INTO t1 id=", new.id, " data='", new.data, "'"));
insert into t1 (id, data) values (1, "one"), (2, "two");
select * from t1;
id data fk
1 one NULL
2 two NULL
select * from t2;
event
INSERT INTO t1 id=1 data='one'
INSERT INTO t1 id=2 data='two'
drop trigger t1.t1_ai;
create trigger t1_bi before insert on t1 for each row
begin
if exists (select id from t3 where id=new.fk) then
insert into t2 values (concat("INSERT INTO t1 id=", new.id, " data='", new.data, "' fk=", new.fk));
else
insert into t2 values (concat("INSERT INTO t1 FAILED id=", new.id, " data='", new.data, "' fk=", new.fk));
set new.id= NULL;
end if;
end|
insert into t3 values (1);
insert into t1 values (4, "four", 1), (5, "five", 2);
ERROR 23000: Column 'id' cannot be null
select * from t1;
id data fk
1 one NULL
2 two NULL
4 four 1
select * from t2;
event
INSERT INTO t1 id=1 data='one'
INSERT INTO t1 id=2 data='two'
INSERT INTO t1 id=4 data='four' fk=1
INSERT INTO t1 FAILED id=5 data='five' fk=2
drop table t1, t2, t3;
create table t1 (id int primary key, data varchar(10));
create table t2 (seq int);
insert into t2 values (10);
create function f1 () returns int return (select max(seq) from t2);
create trigger t1_bi before insert on t1 for each row
begin
if new.id > f1() then
set new.id:= f1();
end if;
end|
select f1();
f1()
10
insert into t1 values (1, "first");
insert into t1 values (f1(), "max");
select * from t1;
id data
1 first
10 max
drop table t1, t2;
drop function f1;
create table t1 (id int primary key, fk_t2 int);
create table t2 (id int primary key, fk_t3 int);
create table t3 (id int primary key);
insert into t1 values (1,1), (2,1), (3,2);
insert into t2 values (1,1), (2,2);
insert into t3 values (1), (2);
create trigger t3_ad after delete on t3 for each row
delete from t2 where fk_t3=old.id;
create trigger t2_ad after delete on t2 for each row
delete from t1 where fk_t2=old.id;
delete from t3 where id = 1;
select * from t1 left join (t2 left join t3 on t2.fk_t3 = t3.id) on t1.fk_t2 = t2.id;
id fk_t2 id fk_t3 id
3 2 2 2 2
drop table t1, t2, t3;
create table t1 (id int primary key, copy int);
create table t2 (id int primary key, data int);
insert into t2 values (1,1), (2,2);
create trigger t1_bi before insert on t1 for each row
set new.copy= (select data from t2 where id = new.id);
create trigger t1_bu before update on t1 for each row
set new.copy= (select data from t2 where id = new.id);
insert into t1 values (1,3), (2,4), (3,3);
update t1 set copy= 1 where id = 2;
select * from t1;
id copy
1 1
2 2
3 NULL
drop table t1, t2;
create table t1 (i int);
create trigger trg before insert on t1 for each row set @a:= old.i;
ERROR HY000: There is no OLD row in on INSERT trigger
......
mysql-test/t/sp-error.test
View file @ f64f74cb
......@@ -986,3 +986,25 @@ create procedure p() execute stmt;
create function f() returns int begin execute stmt;
deallocate prepare stmt;
#
# Bug#11834 "Re-execution of prepared statement with dropped function
# crashes server". Also tests handling of prepared stmts which use
# stored functions but does not require prelocking.
#
--disable_warnings
drop function if exists bug11834_1;
drop function if exists bug11834_2;
--enable_warnings
create function bug11834_1() returns int return 10;
create function bug11834_2() returns int return bug11834_1();
prepare stmt from "select bug11834_2()";
execute stmt;
# Re-execution of statement should not crash server.
execute stmt;
drop function bug11834_1;
# Attempt to execute statement should return proper error and
# should not crash server.
--error ER_SP_DOES_NOT_EXIST
execute stmt;
deallocate prepare stmt;
drop function bug11834_2;
mysql-test/t/sp.test
View file @ f64f74cb
......@@ -1414,7 +1414,8 @@ select * from v1|
# views and functions ?
create function f1() returns int
return (select sum(data) from t1) + (select sum(data) from v1)|
# FIXME All these just exceed file limit for me :)
# This queries will crash server because we can't use LEX in
# reenterable fashion yet. Patch disabling recursion will heal this.
#select f1()|
#select * from v1|
#select * from v2|
......@@ -1459,15 +1460,12 @@ select * from v2|
select * from v1|
# These should not work as we have too little instances of tables locked
--error 1100
select * from v1, v2|
select * from v1, t1|
--error 1100
select f4()|
unlock tables|
# TODO We also should test integration with triggers
# Cleanup
drop function f0|
drop function f1|
......
mysql-test/t/trigger.test
View file @ f64f74cb
......@@ -3,9 +3,10 @@
#
--disable_warnings
drop table if exists t1, t2;
drop table if exists t1, t2, t3;
drop view if exists v1;
drop database if exists mysqltest;
drop function if exists f1;
--enable_warnings
create table t1 (i int);
......@@ -199,6 +200,86 @@ select @log;
drop table t1;
#
# Let us test triggers which access other tables.
#
# Trivial trigger which inserts data into another table
create table t1 (id int primary key, data varchar(10), fk int);
create table t2 (event varchar(100));
create table t3 (id int primary key);
create trigger t1_ai after insert on t1 for each row
insert into t2 values (concat("INSERT INTO t1 id=", new.id, " data='", new.data, "'"));
insert into t1 (id, data) values (1, "one"), (2, "two");
select * from t1;
select * from t2;
drop trigger t1.t1_ai;
# Trigger which uses couple of tables (and partially emulates FK constraint)
delimiter |;
create trigger t1_bi before insert on t1 for each row
begin
if exists (select id from t3 where id=new.fk) then
insert into t2 values (concat("INSERT INTO t1 id=", new.id, " data='", new.data, "' fk=", new.fk));
else
insert into t2 values (concat("INSERT INTO t1 FAILED id=", new.id, " data='", new.data, "' fk=", new.fk));
set new.id= NULL;
end if;
end|
delimiter ;|
insert into t3 values (1);
--error 1048
insert into t1 values (4, "four", 1), (5, "five", 2);
select * from t1;
select * from t2;
drop table t1, t2, t3;
# Trigger which invokes function
create table t1 (id int primary key, data varchar(10));
create table t2 (seq int);
insert into t2 values (10);
create function f1 () returns int return (select max(seq) from t2);
delimiter |;
create trigger t1_bi before insert on t1 for each row
begin
if new.id > f1() then
set new.id:= f1();
end if;
end|
delimiter ;|
# Remove this once bug #11554 will be fixed.
select f1();
insert into t1 values (1, "first");
insert into t1 values (f1(), "max");
select * from t1;
drop table t1, t2;
drop function f1;
# Trigger which forces invocation of another trigger
# (emulation of FK on delete cascade policy)
create table t1 (id int primary key, fk_t2 int);
create table t2 (id int primary key, fk_t3 int);
create table t3 (id int primary key);
insert into t1 values (1,1), (2,1), (3,2);
insert into t2 values (1,1), (2,2);
insert into t3 values (1), (2);
create trigger t3_ad after delete on t3 for each row
delete from t2 where fk_t3=old.id;
create trigger t2_ad after delete on t2 for each row
delete from t1 where fk_t2=old.id;
delete from t3 where id = 1;
select * from t1 left join (t2 left join t3 on t2.fk_t3 = t3.id) on t1.fk_t2 = t2.id;
drop table t1, t2, t3;
# Trigger which assigns value selected from table to field of row
# being inserted/updated.
create table t1 (id int primary key, copy int);
create table t2 (id int primary key, data int);
insert into t2 values (1,1), (2,2);
create trigger t1_bi before insert on t1 for each row
set new.copy= (select data from t2 where id = new.id);
create trigger t1_bu before update on t1 for each row
set new.copy= (select data from t2 where id = new.id);
insert into t1 values (1,3), (2,4), (3,3);
update t1 set copy= 1 where id = 2;
select * from t1;
drop table t1, t2;
#
# Test of wrong column specifiers in triggers
#
......
sql/item_func.cc
View file @ f64f74cb
......@@ -4707,6 +4707,7 @@ Item_func_sp::cleanup()
delete result_field;
result_field= NULL;
}
m_sp= NULL;
Item_func::cleanup();
}
......
sql/sp.cc
View file @ f64f74cb
......@@ -19,6 +19,7 @@
#include "sp.h"
#include "sp_head.h"
#include "sp_cache.h"
#include "sql_trigger.h"
static bool
create_string(THD *thd, String *buf,
......@@ -1072,145 +1073,317 @@ sp_function_exists(THD *thd, sp_name *name)
}
byte *
sp_lex_sp_key(const byte *ptr, uint *plen, my_bool first)
/*
Structure that represents element in the set of stored routines
used by statement or routine.
*/
struct Sroutine_hash_entry;
struct Sroutine_hash_entry
{
LEX_STRING *lsp= (LEX_STRING *)ptr;
*plen= lsp->length;
return (byte *)lsp->str;
/* 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;
}
void
sp_add_to_hash(HASH *h, sp_name *fun)
/*
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, Item_arena *arena,
const LEX_STRING *key)
{
if (! hash_search(h, (byte *)fun->m_qname.str, fun->m_qname.length))
if (!hash_search(&lex->sroutines, (byte *)key->str, key->length))
{
LEX_STRING *ls= (LEX_STRING *)sql_alloc(sizeof(LEX_STRING));
ls->str= sql_strmake(fun->m_qname.str, fun->m_qname.length);
ls->length= fun->m_qname.length;
my_hash_insert(h, (byte *)ls);
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;
}
/*
Merge contents of two hashes containing LEX_STRING's
Add routine to the set of stored routines used by statement.
SYNOPSIS
sp_merge_hash()
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.
To be friendly towards prepared statements one should pass
persistent arena as second argument.
*/
void sp_add_used_routine(LEX *lex, Item_arena *arena,
sp_name *rt, char rt_type)
{
rt->set_routine_type(rt_type);
(void)add_used_routine(lex, arena, &rt->m_sroutines_key);
}
/*
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
RETURN VALUE
TRUE - if we have added some new elements to destination hash.
FALSE - there were no new elements in src.
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.
*/
bool
sp_merge_hash(HASH *dst, HASH *src)
void sp_update_sp_used_routines(HASH *dst, HASH *src)
{
bool res= FALSE;
for (uint i=0 ; i < src->records ; i++)
{
LEX_STRING *ls= (LEX_STRING *)hash_element(src, i);
if (! hash_search(dst, (byte *)ls->str, ls->length))
{
my_hash_insert(dst, (byte *)ls);
res= TRUE;
}
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);
}
return res;
}
/*
Cache all routines implicitly or explicitly used by query
(or whatever object is represented by LEX).
Add contents of hash representing set of routines to the set of
routines used by statement.
SYNOPSIS
sp_cache_routines()
sp_update_stmt_used_routines()
thd - thread context
lex - LEX representing query
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->current_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).
NOTE
If some function is missing this won't be reported here.
Instead this fact will be discovered during query execution.
TODO
Currently if after passing through routine hashes we discover
that we have added something to them, we do one more pass to
process all routines which were missed on previous pass because
of these additions. We can avoid this if along with hashes
we use lists holding routine names and iterate other these
lists instead of hashes (since addition to the end of list
does not reorder elements in it).
RETURN VALUE
TRUE - some tables were added
FALSE - no tables were added.
*/
void
sp_cache_routines(THD *thd, LEX *lex)
static bool
sp_cache_routines_and_add_tables_aux(THD *thd, LEX *lex,
Sroutine_hash_entry *start)
{
bool routines_added= TRUE;
bool result= FALSE;
DBUG_ENTER("sp_cache_routines");
DBUG_ENTER("sp_cache_routines_and_add_tables_aux");
while (routines_added)
for (Sroutine_hash_entry *rt= start; rt; rt= rt->next)
{
routines_added= FALSE;
sp_name name(rt->key.str, rt->key.length);
int type= rt->key.str[0];
sp_head *sp;
for (int type= TYPE_ENUM_FUNCTION; type < TYPE_ENUM_TRIGGER; type++)
if (!(sp= sp_cache_lookup((type == TYPE_ENUM_FUNCTION ?
&thd->sp_func_cache : &thd->sp_proc_cache),
&name)))
{
HASH *h= (type == TYPE_ENUM_FUNCTION ? &lex->spfuns : &lex->spprocs);
for (uint i=0 ; i < h->records ; i++)
LEX *oldlex= thd->lex;
LEX *newlex= new st_lex;
thd->lex= newlex;
/* Pass hint pointer to mysql.proc table */
newlex->proc_table= oldlex->proc_table;
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)
{
LEX_STRING *ls= (LEX_STRING *)hash_element(h, i);
sp_name name(*ls);
sp_head *sp;
name.m_qname= *ls;
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;
/* Pass hint pointer to mysql.proc table */
newlex->proc_table= oldlex->proc_table;
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 (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)
{
sp_update_stmt_used_routines(thd, lex, &sp->m_sroutines);
result|= sp->add_used_tables_to_table_list(thd, &lex->query_tables_last);
}
}
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
RETURN VALUE
TRUE - some tables were added
FALSE - no tables were added.
*/
bool
sp_cache_routines_and_add_tables(THD *thd, LEX *lex)
{
if (sp)
return sp_cache_routines_and_add_tables_aux(thd, lex,
(Sroutine_hash_entry *)lex->sroutines_list.first);
}
/*
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);
(void)sp_cache_routines_and_add_tables_aux(thd, lex,
*last_cached_routine_ptr);
}
/*
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->current_arena, &triggers->sroutines_key))
{
Sroutine_hash_entry **last_cached_routine_ptr=
(Sroutine_hash_entry **)lex->sroutines_list.next;
for (int i= 0; i < 3; i++)
for (int j= 0; j < 2; j++)
if (triggers->bodies[i][j])
{
routines_added|= sp_merge_hash(&lex->spfuns, &sp->m_spfuns);
routines_added|= sp_merge_hash(&lex->spprocs, &sp->m_spprocs);
(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);
}
DBUG_VOID_RETURN;
}
/*
* Generates the CREATE... string from the table information.
* Returns TRUE on success, FALSE on (alloc) failure.
......
sql/sp.h
View file @ f64f74cb
......@@ -79,15 +79,19 @@ sp_function_exists(THD *thd, sp_name *name);
/*
* For precaching of functions and procedures
*/
void
sp_add_to_hash(HASH *h, sp_name *fun);
bool
sp_merge_hash(HASH *dst, HASH *src);
void
sp_cache_routines(THD *thd, LEX *lex);
Procedures for pre-caching of stored routines and building table list
for prelocking.
*/
void sp_add_used_routine(LEX *lex, Item_arena *arena,
sp_name *rt, char rt_type);
void sp_update_sp_used_routines(HASH *dst, HASH *src);
bool sp_cache_routines_and_add_tables(THD *thd, LEX *lex);
void sp_cache_routines_and_add_tables_for_view(THD *thd, LEX *lex,
LEX *aux_lex);
void sp_cache_routines_and_add_tables_for_triggers(THD *thd, LEX *lex,
Table_triggers_list *triggers);
extern "C" byte* sp_sroutine_key(const byte *ptr, uint *plen, my_bool first);
//
// Utilities...
......
sql/sp_head.cc
View file @ f64f74cb
......@@ -242,8 +242,11 @@ sp_eval_func_item(THD *thd, Item **it_addr, enum enum_field_types type,
void
sp_name::init_qname(THD *thd)
{
m_qname.length= m_db.length+m_name.length+1;
m_qname.str= thd->alloc(m_qname.length+1);
m_sroutines_key.length= m_db.length + m_name.length + 2;
if (!(m_sroutines_key.str= thd->alloc(m_sroutines_key.length + 1)))
return;
m_qname.length= m_sroutines_key.length - 1;
m_qname.str= m_sroutines_key.str + 1;
sprintf(m_qname.str, "%*s.%*s",
m_db.length, (m_db.length ? m_db.str : ""),
m_name.length, m_name.str);
......@@ -315,16 +318,13 @@ sp_head::sp_head()
{
extern byte *
sp_table_key(const byte *ptr, uint *plen, my_bool first);
extern byte
*sp_lex_sp_key(const byte *ptr, uint *plen, my_bool first);
DBUG_ENTER("sp_head::sp_head");
state= INITIALIZED_FOR_SP;
m_backpatch.empty();
m_lex.empty();
hash_init(&m_sptabs, system_charset_info, 0, 0, 0, sp_table_key, 0, 0);
hash_init(&m_spfuns, system_charset_info, 0, 0, 0, sp_lex_sp_key, 0, 0);
hash_init(&m_spprocs, system_charset_info, 0, 0, 0, sp_lex_sp_key, 0, 0);
hash_init(&m_sroutines, system_charset_info, 0, 0, 0, sp_sroutine_key, 0, 0);
DBUG_VOID_RETURN;
}
......@@ -527,8 +527,7 @@ sp_head::destroy()
}
hash_free(&m_sptabs);
hash_free(&m_spfuns);
hash_free(&m_spprocs);
hash_free(&m_sroutines);
DBUG_VOID_RETURN;
}
......@@ -1037,11 +1036,10 @@ sp_head::restore_lex(THD *thd)
oldlex->trg_table_fields.push_back(&sublex->trg_table_fields);
/*
Add routines which are used by statement to respective sets for
this routine
Add routines which are used by statement to respective set for
this routine.
*/
sp_merge_hash(&m_spfuns, &sublex->spfuns);
sp_merge_hash(&m_spprocs, &sublex->spprocs);
sp_update_sp_used_routines(&m_sroutines, &sublex->sroutines);
/*
Merge tables used by this statement (but not by its functions or
procedures) to multiset of tables used by this routine.
......@@ -1578,16 +1576,22 @@ sp_instr_set::print(String *str)
int
sp_instr_set_trigger_field::execute(THD *thd, uint *nextp)
{
int res= 0;
DBUG_ENTER("sp_instr_set_trigger_field::execute");
/* QQ: Still unsure what should we return in case of error 1 or -1 ? */
if (!value->fixed && value->fix_fields(thd, 0, &value) ||
trigger_field->fix_fields(thd, 0, 0) ||
(value->save_in_field(trigger_field->field, 0) < 0))
DBUG_RETURN(m_lex_keeper.reset_lex_and_exec_core(thd, nextp, TRUE, this));
}
int
sp_instr_set_trigger_field::exec_core(THD *thd, uint *nextp)
{
int res= 0;
Item *it= sp_prepare_func_item(thd, &value);
if (!it ||
!trigger_field->fixed && trigger_field->fix_fields(thd, 0, 0) ||
(it->save_in_field(trigger_field->field, 0) < 0))
res= -1;
*nextp= m_ip + 1;
DBUG_RETURN(res);
*nextp = m_ip+1;
return res;
}
void
......@@ -2399,72 +2403,3 @@ sp_add_to_query_tables(THD *thd, LEX *lex,
return table;
}
/*
Auxilary function for adding tables used by routines used in query
to table lists.
SYNOPSIS
sp_add_sp_tables_to_table_list_aux()
thd - thread context
lex - LEX to which table list tables will be added
func_hash - routines for which tables should be added
func_cache- SP cache in which this routines should be looked up
NOTE
See sp_add_sp_tables_to_table_list() for more info.
RETURN VALUE
TRUE - some tables were added
FALSE - no tables were added.
*/
static bool
sp_add_sp_tables_to_table_list_aux(THD *thd, LEX *lex, HASH *func_hash,
sp_cache **func_cache)
{
uint i;
bool result= FALSE;
for (i= 0 ; i < func_hash->records ; i++)
{
sp_head *sp;
LEX_STRING *ls= (LEX_STRING *)hash_element(func_hash, i);
sp_name name(*ls);
name.m_qname= *ls;
if ((sp= sp_cache_lookup(func_cache, &name)))
result|= sp->add_used_tables_to_table_list(thd, &lex->query_tables_last);
}
return result;
}
/*
Add tables used by routines used in query to table list.
SYNOPSIS
sp_add_sp_tables_to_table_list()
thd - thread context
lex - LEX to which table list tables will be added
func_lex - LEX for which functions we get tables
(useful for adding tables used by view routines)
NOTE
Elements of list will be allocated in PS memroot, so this
list will be persistent between PS execetutions.
RETURN VALUE
TRUE - some tables were added
FALSE - no tables were added.
*/
bool
sp_add_sp_tables_to_table_list(THD *thd, LEX *lex, LEX *func_lex)
{
return (sp_add_sp_tables_to_table_list_aux(thd, lex, &func_lex->spfuns,
&thd->sp_func_cache) |
sp_add_sp_tables_to_table_list_aux(thd, lex, &func_lex->spprocs,
&thd->sp_proc_cache));
}
sql/sp_head.h
View file @ f64f74cb
......@@ -48,24 +48,50 @@ class sp_name : public Sql_alloc
LEX_STRING m_db;
LEX_STRING m_name;
LEX_STRING m_qname;
/*
Key representing routine in the set of stored routines used by statement.
Consists of 1-byte routine type and m_qname (which usually refences to
same buffer). Note that one must complete initialization of the key by
calling set_routine_type().
*/
LEX_STRING m_sroutines_key;
sp_name(LEX_STRING name)
: m_name(name)
{
m_db.str= m_qname.str= 0;
m_db.length= m_qname.length= 0;
m_db.str= m_qname.str= m_sroutines_key.str= 0;
m_db.length= m_qname.length= m_sroutines_key.length= 0;
}
sp_name(LEX_STRING db, LEX_STRING name)
: m_db(db), m_name(name)
{
m_qname.str= 0;
m_qname.length= 0;
m_qname.str= m_sroutines_key.str= 0;
m_qname.length= m_sroutines_key.length= 0;
}
/*
Creates temporary sp_name object from key, used mainly
for SP-cache lookups.
*/
sp_name(char *key, uint key_len)
{
m_sroutines_key.str= key;
m_sroutines_key.length= key_len;
m_name.str= m_qname.str= key + 1;
m_name.length= m_qname.length= key_len - 1;
m_db.str= 0;
m_db.length= 0;
}
// Init. the qualified name from the db and name.
void init_qname(THD *thd); // thd for memroot allocation
void set_routine_type(char type)
{
m_sroutines_key.str[0]= type;
}
~sp_name()
{}
};
......@@ -106,13 +132,13 @@ class sp_head :private Item_arena
longlong m_created;
longlong m_modified;
/*
Sets containing names of SP and SF used by this routine.
TODO Probably we should combine these two hashes in one. It will
decrease memory overhead ans simplify algorithms using them. The
same applies to similar hashes in LEX.
Set containing names of stored routines used by this routine.
Note that unlike elements of similar set for statement elements of this
set are not linked in one list. Because of this we are able save memory
by using for this set same objects that are used in 'sroutines' sets
for statements of which this stored routine consists.
*/
HASH m_spfuns, m_spprocs;
HASH m_sroutines;
// Pointers set during parsing
uchar *m_param_begin, *m_param_end, *m_body_begin;
......@@ -471,10 +497,11 @@ class sp_instr_set_trigger_field : public sp_instr
public:
sp_instr_set_trigger_field(uint ip, sp_pcontext *ctx,
Item_trigger_field *trg_fld, Item *val)
Item_trigger_field *trg_fld,
Item *val, LEX *lex)
: sp_instr(ip, ctx),
trigger_field(trg_fld),
value(val)
value(val), m_lex_keeper(lex, TRUE)
{}
virtual ~sp_instr_set_trigger_field()
......@@ -482,11 +509,14 @@ class sp_instr_set_trigger_field : public sp_instr
virtual int execute(THD *thd, uint *nextp);
virtual int exec_core(THD *thd, uint *nextp);
virtual void print(String *str);
private:
Item_trigger_field *trigger_field;
Item *value;
sp_lex_keeper m_lex_keeper;
}; // class sp_instr_trigger_field : public sp_instr
......@@ -951,7 +981,5 @@ TABLE_LIST *
sp_add_to_query_tables(THD *thd, LEX *lex,
const char *db, const char *name,
thr_lock_type locktype);
bool
sp_add_sp_tables_to_table_list(THD *thd, LEX *lex, LEX *func_lex);
#endif /* _SP_HEAD_H_ */
sql/sql_base.cc
View file @ f64f74cb
......@@ -1792,16 +1792,13 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter)
may be still zero for prelocked statement...
*/
if (!thd->prelocked_mode && !thd->lex->requires_prelocking() &&
(thd->lex->spfuns.records || thd->lex->spprocs.records))
thd->lex->sroutines.records)
{
TABLE_LIST **save_query_tables_last;
sp_cache_routines(thd, thd->lex);
save_query_tables_last= thd->lex->query_tables_last;
TABLE_LIST **save_query_tables_last= thd->lex->query_tables_last;
DBUG_ASSERT(thd->lex->query_tables == *start);
if (sp_add_sp_tables_to_table_list(thd, thd->lex, thd->lex) ||
if (sp_cache_routines_and_add_tables(thd, thd->lex) ||
*start)
{
query_tables_last_own= save_query_tables_last;
......@@ -1837,19 +1834,16 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter)
and add tables used by them to table list.
*/
if (!thd->prelocked_mode && !thd->lex->requires_prelocking() &&
(tables->view->spfuns.records || tables->view->spprocs.records))
tables->view->sroutines.records)
{
// FIXME We should catch recursion for both views and funcs here
sp_cache_routines(thd, tables->view);
/* We have at least one table in TL here */
if (!query_tables_last_own)
query_tables_last_own= thd->lex->query_tables_last;
sp_add_sp_tables_to_table_list(thd, thd->lex, tables->view);
sp_cache_routines_and_add_tables_for_view(thd, thd->lex,
tables->view);
}
/* Cleanup hashes because destructo for this LEX is never called */
hash_free(&tables->view->spfuns);
hash_free(&tables->view->spprocs);
hash_free(&tables->view->sroutines);
continue;
}
......@@ -1904,9 +1898,6 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter)
prelocking list.
If we lock table for reading we won't update it so there is no need to
process its triggers since they never will be activated.
FIXME Now we are simply turning on prelocking. Proper integration
and testing is to be done later.
*/
if (!thd->prelocked_mode && !thd->lex->requires_prelocking() &&
tables->table->triggers &&
......@@ -1914,6 +1905,8 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter)
{
if (!query_tables_last_own)
query_tables_last_own= thd->lex->query_tables_last;
sp_cache_routines_and_add_tables_for_triggers(thd, thd->lex,
tables->table->triggers);
}
free_root(&new_frm_mem, MYF(MY_KEEP_PREALLOC));
}
......
sql/sql_lex.cc
View file @ f64f74cb
......@@ -172,10 +172,9 @@ void lex_start(THD *thd, uchar *buf,uint length)
lex->proc_list.first= 0;
lex->query_tables_own_last= 0;
if (lex->spfuns.records)
my_hash_reset(&lex->spfuns);
if (lex->spprocs.records)
my_hash_reset(&lex->spprocs);
if (lex->sroutines.records)
my_hash_reset(&lex->sroutines);
lex->sroutines_list.empty();
DBUG_VOID_RETURN;
}
......@@ -1570,6 +1569,28 @@ void st_select_lex::print_limit(THD *thd, String *str)
}
/*
Initialize LEX object.
SYNOPSIS
st_lex::st_lex()
NOTE
LEX object initialized with this constructor can be used as part of
THD object for which one can safely call open_tables(), lock_tables()
and close_thread_tables() functions. But it is not yet ready for
statement parsing. On should use lex_start() function to prepare LEX
for this.
*/
st_lex::st_lex()
:result(0), sql_command(SQLCOM_END), query_tables_own_last(0)
{
hash_init(&sroutines, system_charset_info, 0, 0, 0, sp_sroutine_key, 0, 0);
sroutines_list.empty();
}
/*
Check whether the merging algorithm can be used on this VIEW
......
sql/sql_lex.h
View file @ f64f74cb
......@@ -797,8 +797,14 @@ typedef struct st_lex
bool sp_lex_in_use; /* Keep track on lex usage in SPs for error handling */
bool all_privileges;
sp_pcontext *spcont;
HASH spfuns; /* Called functions */
HASH spprocs; /* Called procedures */
/* Set of stored routines called by statement. */
HASH sroutines;
/*
List linking elements of 'sroutines' set. Allows you to add new elements
to this set as you iterate through the list of existing elements.
*/
SQL_LIST sroutines_list;
st_sp_chistics sp_chistics;
bool only_view; /* used for SHOW CREATE TABLE/VIEW */
/*
......@@ -831,17 +837,11 @@ typedef struct st_lex
*/
uchar *fname_start, *fname_end;
st_lex() :result(0), sql_command(SQLCOM_END), query_tables_own_last(0)
{
extern byte *sp_lex_sp_key(const byte *ptr, uint *plen, my_bool first);
hash_init(&spfuns, system_charset_info, 0, 0, 0, sp_lex_sp_key, 0, 0);
hash_init(&spprocs, system_charset_info, 0, 0, 0, sp_lex_sp_key, 0, 0);
}
st_lex();
virtual ~st_lex()
{
hash_free(&spfuns);
hash_free(&spprocs);
hash_free(&sroutines);
}
inline void uncacheable(uint8 cause)
......
sql/sql_parse.cc
View file @ f64f74cb
......@@ -2296,8 +2296,7 @@ mysql_execute_command(THD *thd)
Don't reset warnings when executing a stored routine.
*/
if ((all_tables || &lex->select_lex != lex->all_selects_list ||
lex->spfuns.records || lex->spprocs.records) &&
!thd->spcont)
lex->sroutines.records) && !thd->spcont)
mysql_reset_errors(thd, 0);
#ifdef HAVE_REPLICATION
......
sql/sql_trigger.cc
View file @ f64f74cb
/* Copyright (C) 2004-2005 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_head.h"
#include "sql_trigger.h"
......@@ -417,6 +434,18 @@ bool Table_triggers_list::check_n_load(THD *thd, const char *db,
table->triggers= triggers;
/*
Construct key that will represent triggers for this table in the set
of routines used by statement.
*/
triggers->sroutines_key.length= 1+strlen(db)+1+strlen(table_name)+1;
if (!(triggers->sroutines_key.str=
alloc_root(&table->mem_root, triggers->sroutines_key.length)))
DBUG_RETURN(1);
triggers->sroutines_key.str[0]= TYPE_ENUM_TRIGGER;
strmov(strmov(strmov(triggers->sroutines_key.str+1, db), "."),
table_name);
/*
TODO: This could be avoided if there is no triggers
for UPDATE and DELETE.
......
sql/sql_trigger.h
View file @ f64f74cb
/* Copyright (C) 2004-2005 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 */
/*
This class holds all information about triggers of table.
......@@ -28,6 +45,14 @@ class Table_triggers_list: public Sql_alloc
used in CREATE/DROP TRIGGER for looking up trigger by name.
*/
List<LEX_STRING> names_list;
/*
Key representing triggers for this table in set of all stored
routines used by statement.
TODO: We won't need this member once triggers namespace will be
database-wide instead of table-wide because then we will be able
to use key based on sp_name as for other stored routines.
*/
LEX_STRING sroutines_key;
public:
/*
......@@ -112,6 +137,8 @@ class Table_triggers_list: public Sql_alloc
}
friend class Item_trigger_field;
friend void sp_cache_routines_and_add_tables_for_triggers(THD *thd, LEX *lex,
Table_triggers_list *triggers);
private:
bool prepare_record1_accessors(TABLE *table);
......
sql/sql_yacc.yy
View file @ f64f74cb
......@@ -1532,7 +1532,7 @@ call:
lex->sql_command= SQLCOM_CALL;
lex->spname= $2;
lex->value_list.empty();
sp_add_to_hash(&lex->spprocs, $2);
sp_add_used_routine(lex, YYTHD, $2, TYPE_ENUM_PROCEDURE);
}
'(' sp_cparam_list ')' {}
;
......@@ -4682,7 +4682,7 @@ simple_expr:
sp_name *name= new sp_name($1, $3);
name->init_qname(YYTHD);
sp_add_to_hash(&lex->spfuns, name);
sp_add_used_routine(lex, YYTHD, name, TYPE_ENUM_FUNCTION);
if ($5)
$$= new Item_func_sp(name, *$5);
else
......@@ -4771,7 +4771,7 @@ simple_expr:
LEX *lex= Lex;
sp_name *name= sp_name_current_db_new(YYTHD, $1);
sp_add_to_hash(&lex->spfuns, name);
sp_add_used_routine(lex, YYTHD, name, TYPE_ENUM_FUNCTION);
if ($3)
$$= new Item_func_sp(name, *$3);
else
......@@ -7684,12 +7684,6 @@ sys_option_value:
yyerror(ER(ER_SYNTAX_ERROR));
YYABORT;
}
if (lex->query_tables)
{
my_message(ER_SP_SUBSELECT_NYI, ER(ER_SP_SUBSELECT_NYI),
MYF(0));
YYABORT;
}
if ($4)
it= $4;
else
......@@ -7702,7 +7696,7 @@ sys_option_value:
$2.base_name.str)) ||
!(i= new sp_instr_set_trigger_field(
lex->sphead->instructions(), lex->spcont,
trg_fld, it)))
trg_fld, it, lex)))
YYABORT;
/*
......
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