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Commit 9ed038dd authored by dlenev@brandersnatch.localdomain's avatar dlenev@brandersnatch.localdomain
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WL#1218 "Triggers". Some very preliminary version of patch. 

Mostly needed for Monty for him getting notion what needed for triggers 
from new .FRM format. 

Things to be done:
- Right placement of trigger's invocations
- Right handling of errors in triggers (including transaction rollback)
- Support for priviliges
- Right handling of DROP/RENAME table (hope that it will be handled automatically
  with merging of .TRG into .FRM file)
- Saving/restoring some information critical for trigger creation and replication
  with their definitions (e.g. sql_mode, creator, ...)
- Replication

Already has some known bugs so probably not for general review.
parent b93aa71d
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Showing with 1664 additions and 78 deletions
include/mysqld_error.h
View file @ 9ed038dd
......@@ -370,4 +370,9 @@
#define ER_VIEW_WRONG_LIST 1351
#define ER_WARN_VIEW_MERGE 1352
#define ER_WARN_VIEW_WITHOUT_KEY 1353
#define ER_ERROR_MESSAGES 354
#define ER_TRG_ALREADY_EXISTS 1354
#define ER_TRG_DOES_NOT_EXIST 1355
#define ER_TRG_ON_VIEW_OR_TEMP_TABLE 1356
#define ER_TRG_CANT_CHANGE_ROW 1357
#define ER_TRG_NO_SUCH_ROW_IN_TRG 1358
#define ER_ERROR_MESSAGES 359
mysql-test/r/trigger.result 0 → 100644
View file @ 9ed038dd
drop table if exists t1, t2;
drop view if exists v1;
create table t1 (i int);
create trigger trg before insert on t1 for each row set @a:=1;
set @a:=0;
select @a;
@a
0
insert into t1 values (1);
select @a;
@a
1
drop trigger t1.trg;
create trigger trg before insert on t1 for each row set @a:=new.i;
insert into t1 values (123);
select @a;
@a
123
drop trigger t1.trg;
drop table t1;
create table t1 (i int not null, j int);
create trigger trg before insert on t1 for each row
begin
if isnull(new.j) then
set new.j:= new.i * 10;
end if;
end|
insert into t1 (i) values (1)|
insert into t1 (i,j) values (2, 3)|
select * from t1|
i j
1 10
2 3
drop trigger t1.trg|
drop table t1|
create table t1 (i int not null primary key);
create trigger trg after insert on t1 for each row
set @a:= if(@a,concat(@a, ":", new.i), new.i);
set @a:="";
insert into t1 values (2),(3),(4),(5);
select @a;
@a
2:3:4:5
drop trigger t1.trg;
drop table t1;
create table t1 (aid int not null primary key, balance int not null default 0);
insert into t1 values (1, 1000), (2,3000);
create trigger trg before update on t1 for each row
begin
declare loc_err varchar(255);
if abs(new.balance - old.balance) > 1000 then
set new.balance:= old.balance;
set loc_err := concat("Too big change for aid = ", new.aid);
set @update_failed:= if(@update_failed, concat(@a, ":", loc_err), loc_err);
end if;
end|
set @update_failed:=""|
update t1 set balance=1500|
select @update_failed;
select * from t1|
@update_failed
Too big change for aid = 2
aid balance
1 1500
2 3000
drop trigger t1.trg|
drop table t1|
create table t1 (i int);
insert into t1 values (1),(2),(3),(4);
create trigger trg after update on t1 for each row
set @total_change:=@total_change + new.i - old.i;
set @total_change:=0;
update t1 set i=3;
select @total_change;
@total_change
2
drop trigger t1.trg;
drop table t1;
create table t1 (i int);
insert into t1 values (1),(2),(3),(4);
create trigger trg before delete on t1 for each row
set @del_sum:= @del_sum + old.i;
set @del_sum:= 0;
delete from t1 where i <= 3;
select @del_sum;
@del_sum
6
drop trigger t1.trg;
drop table t1;
create table t1 (i int);
insert into t1 values (1),(2),(3),(4);
create trigger trg after delete on t1 for each row set @del:= 1;
set @del:= 0;
delete from t1 where i <> 0;
select @del;
@del
1
drop trigger t1.trg;
drop table t1;
create table t1 (i int, j int);
create trigger trg1 before insert on t1 for each row
begin
if new.j > 10 then
set new.j := 10;
end if;
end|
create trigger trg2 before update on t1 for each row
begin
if old.i % 2 = 0 then
set new.j := -1;
end if;
end|
create trigger trg3 after update on t1 for each row
begin
if new.j = -1 then
set @fired:= "Yes";
end if;
end|
set @fired:="";
insert into t1 values (1,2),(2,3),(3,14);
select @fired;
@fired
select * from t1;
i j
1 2
2 3
3 10
update t1 set j= 20;
select @fired;
@fired
Yes
select * from t1;
i j
1 20
2 -1
3 20
drop trigger t1.trg1;
drop trigger t1.trg2;
drop trigger t1.trg3;
drop table t1;
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
create trigger trg before delete on t1 for each row set @a:= new.i;
ERROR HY000: There is no NEW row in on DELETE trigger
create trigger trg before update on t1 for each row set old.i:=1;
ERROR HY000: Updating of OLD row is not allowed in trigger
create trigger trg before delete on t1 for each row set new.i:=1;
ERROR HY000: There is no NEW row in on DELETE trigger
create trigger trg after update on t1 for each row set new.i:=1;
ERROR HY000: Updating of NEW row is not allowed in after trigger
create trigger trg before insert on t2 for each row set @a:=1;
ERROR 42S02: Table 'test.t2' doesn't exist
create trigger trg before insert on t1 for each row set @a:=1;
create trigger trg after insert on t1 for each row set @a:=1;
ERROR HY000: Trigger already exists
create trigger trg2 before insert on t1 for each row set @a:=1;
ERROR HY000: Trigger already exists
drop trigger t1.trg;
drop trigger t1.trg;
ERROR HY000: Trigger does not exist
create view v1 as select * from t1;
create trigger trg before insert on v1 for each row set @a:=1;
ERROR HY000: Trigger's 'v1' is view or temporary table
drop view v1;
drop table t1;
create temporary table t1 (i int);
create trigger trg before insert on t1 for each row set @a:=1;
ERROR HY000: Trigger's 't1' is view or temporary table
drop table t1;
mysql-test/t/trigger.test 0 → 100644
View file @ 9ed038dd
#
# Basic triggers test
#
--disable_warnings
drop table if exists t1, t2;
drop view if exists v1;
--enable_warnings
create table t1 (i int);
# let us test some very simple trigger
create trigger trg before insert on t1 for each row set @a:=1;
set @a:=0;
select @a;
insert into t1 values (1);
select @a;
drop trigger t1.trg;
# let us test simple trigger reading some values
create trigger trg before insert on t1 for each row set @a:=new.i;
insert into t1 values (123);
select @a;
drop trigger t1.trg;
drop table t1;
# Let us test before insert trigger
# Such triggers can be used for setting complex default values
create table t1 (i int not null, j int);
delimiter |;
create trigger trg before insert on t1 for each row
begin
if isnull(new.j) then
set new.j:= new.i * 10;
end if;
end|
insert into t1 (i) values (1)|
insert into t1 (i,j) values (2, 3)|
select * from t1|
drop trigger t1.trg|
drop table t1|
delimiter ;|
# After insert trigger
# Useful for aggregating data
create table t1 (i int not null primary key);
create trigger trg after insert on t1 for each row
set @a:= if(@a,concat(@a, ":", new.i), new.i);
set @a:="";
insert into t1 values (2),(3),(4),(5);
select @a;
drop trigger t1.trg;
drop table t1;
# Before update trigger
# (In future we will achieve this via proper error handling in triggers)
create table t1 (aid int not null primary key, balance int not null default 0);
insert into t1 values (1, 1000), (2,3000);
delimiter |;
create trigger trg before update on t1 for each row
begin
declare loc_err varchar(255);
if abs(new.balance - old.balance) > 1000 then
set new.balance:= old.balance;
set loc_err := concat("Too big change for aid = ", new.aid);
set @update_failed:= if(@update_failed, concat(@a, ":", loc_err), loc_err);
end if;
end|
set @update_failed:=""|
update t1 set balance=1500|
select @update_failed;
select * from t1|
drop trigger t1.trg|
drop table t1|
delimiter ;|
# After update trigger
create table t1 (i int);
insert into t1 values (1),(2),(3),(4);
create trigger trg after update on t1 for each row
set @total_change:=@total_change + new.i - old.i;
set @total_change:=0;
update t1 set i=3;
select @total_change;
drop trigger t1.trg;
drop table t1;
# Before delete trigger
# This can be used for aggregation too :)
create table t1 (i int);
insert into t1 values (1),(2),(3),(4);
create trigger trg before delete on t1 for each row
set @del_sum:= @del_sum + old.i;
set @del_sum:= 0;
delete from t1 where i <= 3;
select @del_sum;
drop trigger t1.trg;
drop table t1;
# After delete trigger.
# Just run out of imagination.
create table t1 (i int);
insert into t1 values (1),(2),(3),(4);
create trigger trg after delete on t1 for each row set @del:= 1;
set @del:= 0;
delete from t1 where i <> 0;
select @del;
drop trigger t1.trg;
drop table t1;
# Several triggers on one table
create table t1 (i int, j int);
delimiter |;
create trigger trg1 before insert on t1 for each row
begin
if new.j > 10 then
set new.j := 10;
end if;
end|
create trigger trg2 before update on t1 for each row
begin
if old.i % 2 = 0 then
set new.j := -1;
end if;
end|
create trigger trg3 after update on t1 for each row
begin
if new.j = -1 then
set @fired:= "Yes";
end if;
end|
delimiter ;|
set @fired:="";
insert into t1 values (1,2),(2,3),(3,14);
select @fired;
select * from t1;
update t1 set j= 20;
select @fired;
select * from t1;
drop trigger t1.trg1;
drop trigger t1.trg2;
drop trigger t1.trg3;
drop table t1;
#
# Test of wrong column specifiers in triggers
#
create table t1 (i int);
--error 1358
create trigger trg before insert on t1 for each row set @a:= old.i;
--error 1358
create trigger trg before delete on t1 for each row set @a:= new.i;
--error 1357
create trigger trg before update on t1 for each row set old.i:=1;
--error 1358
create trigger trg before delete on t1 for each row set new.i:=1;
--error 1357
create trigger trg after update on t1 for each row set new.i:=1;
# TODO: We should also test wrong field names here, we don't do it now
# because proper error handling is not in place yet.
#
# Let us test various trigger creation errors
#
#
--error 1146
create trigger trg before insert on t2 for each row set @a:=1;
create trigger trg before insert on t1 for each row set @a:=1;
--error 1354
create trigger trg after insert on t1 for each row set @a:=1;
--error 1354
create trigger trg2 before insert on t1 for each row set @a:=1;
drop trigger t1.trg;
--error 1355
drop trigger t1.trg;
create view v1 as select * from t1;
--error 1356
create trigger trg before insert on v1 for each row set @a:=1;
drop view v1;
drop table t1;
create temporary table t1 (i int);
--error 1356
create trigger trg before insert on t1 for each row set @a:=1;
drop table t1;
sql/Makefile.am
View file @ 9ed038dd
......@@ -61,7 +61,7 @@ noinst_HEADERS = item.h item_func.h item_sum.h item_cmpfunc.h \
spatial.h gstream.h client_settings.h tzfile.h \
tztime.h examples/ha_example.h examples/ha_archive.h \
sp_head.h sp_pcontext.h sp_rcontext.h sp.h sp_cache.h \
parse_file.h sql_view.h
parse_file.h sql_view.h sql_trigger.h
mysqld_SOURCES = sql_lex.cc sql_handler.cc \
item.cc item_sum.cc item_buff.cc item_func.cc \
item_cmpfunc.cc item_strfunc.cc item_timefunc.cc \
......@@ -95,7 +95,7 @@ mysqld_SOURCES = sql_lex.cc sql_handler.cc \
tztime.cc my_time.c \
examples/ha_example.cc examples/ha_archive.cc \
sp_head.cc sp_pcontext.cc sp_rcontext.cc sp.cc \
sp_cache.cc parse_file.cc
sp_cache.cc parse_file.cc sql_trigger.cc
gen_lex_hash_SOURCES = gen_lex_hash.cc
gen_lex_hash_LDADD = $(LDADD) $(CXXLDFLAGS)
mysql_tzinfo_to_sql_SOURCES = mysql_tzinfo_to_sql.cc
......
sql/item.cc
View file @ 9ed038dd
......@@ -24,6 +24,8 @@
#include "my_dir.h"
#include "sp_rcontext.h"
#include "sql_acl.h"
#include "sp_head.h"
#include "sql_trigger.h"
static void mark_as_dependent(THD *thd,
SELECT_LEX *last, SELECT_LEX *current,
......@@ -2251,6 +2253,97 @@ void Item_insert_value::print(String *str)
str->append(')');
}
/*
Bind item representing field of row being changed in trigger
to appropriate Field object.
SYNOPSIS
setup_field()
thd - current thread context
table - table of trigger (and where we looking for fields)
event - type of trigger event
NOTE
This function does almost the same as fix_fields() for Item_field
but is invoked during trigger definition parsing and takes TABLE
object as its argument.
RETURN VALUES
0 ok
1 field was not found.
*/
bool Item_trigger_field::setup_field(THD *thd, TABLE *table,
enum trg_event_type event)
{
bool result= 1;
uint field_idx= (uint)-1;
bool save_set_query_id= thd->set_query_id;
/* TODO: Think more about consequences of this step. */
thd->set_query_id= 0;
if (find_field_in_real_table(thd, table, field_name,
strlen(field_name), 0, 0,
&field_idx))
{
field= (row_version == OLD_ROW && event == TRG_EVENT_UPDATE) ?
table->triggers->old_field[field_idx] :
table->field[field_idx];
result= 0;
}
thd->set_query_id= save_set_query_id;
return result;
}
bool Item_trigger_field::eq(const Item *item, bool binary_cmp) const
{
return item->type() == TRIGGER_FIELD_ITEM &&
row_version == ((Item_trigger_field *)item)->row_version &&
!my_strcasecmp(system_charset_info, field_name,
((Item_trigger_field *)item)->field_name);
}
bool Item_trigger_field::fix_fields(THD *thd,
TABLE_LIST *table_list,
Item **items)
{
/*
Since trigger is object tightly associated with TABLE object most
of its set up can be performed during trigger loading i.e. trigger
parsing! So we have little to do in fix_fields. :)
FIXME may be we still should bother about permissions here.
*/
DBUG_ASSERT(fixed == 0);
// QQ: May be this should be moved to setup_field?
set_field(field);
fixed= 1;
return 0;
}
void Item_trigger_field::print(String *str)
{
str->append((row_version == NEW_ROW) ? "NEW" : "OLD", 3);
str->append('.');
str->append(field_name);
}
void Item_trigger_field::cleanup()
{
/*
Since special nature of Item_trigger_field we should not do most of
things from Item_field::cleanup() or Item_ident::cleanup() here.
*/
Item::cleanup();
}
/*
If item is a const function, calculate it and return a const item
The original item is freed if not returned
......
sql/item.h
View file @ 9ed038dd
......@@ -99,7 +99,7 @@ public:
PROC_ITEM,COND_ITEM, REF_ITEM, FIELD_STD_ITEM,
FIELD_VARIANCE_ITEM, INSERT_VALUE_ITEM,
SUBSELECT_ITEM, ROW_ITEM, CACHE_ITEM, TYPE_HOLDER,
PARAM_ITEM};
PARAM_ITEM, TRIGGER_FIELD_ITEM};
enum cond_result { COND_UNDEF,COND_OK,COND_TRUE,COND_FALSE };
......@@ -439,6 +439,7 @@ public:
class Item_field :public Item_ident
{
protected:
void set_field(Field *field);
public:
Field *field,*result_field;
......@@ -1152,6 +1153,57 @@ public:
}
};
/*
We need this two enums here instead of sql_lex.h because
at least one of them is used by Item_trigger_field interface.
Time when trigger is invoked (i.e. before or after row actually
inserted/updated/deleted).
*/
enum trg_action_time_type
{
TRG_ACTION_BEFORE= 0, TRG_ACTION_AFTER= 1
};
/*
Event on which trigger is invoked.
*/
enum trg_event_type
{
TRG_EVENT_INSERT= 0 , TRG_EVENT_UPDATE= 1, TRG_EVENT_DELETE= 2
};
/*
Represents NEW/OLD version of field of row which is
changed/read in trigger.
Note: For this item actual binding to Field object happens not during
fix_fields() (like for Item_field) but during parsing of trigger
definition, when table is opened, with special setup_field() call.
*/
class Item_trigger_field : public Item_field
{
public:
/* Is this item represents row from NEW or OLD row ? */
enum row_version_type {OLD_ROW, NEW_ROW};
row_version_type row_version;
Item_trigger_field(row_version_type row_ver_par,
const char *field_name_par):
Item_field((const char *)NULL, (const char *)NULL, field_name_par),
row_version(row_ver_par)
{}
bool setup_field(THD *thd, TABLE *table, enum trg_event_type event);
enum Type type() const { return TRIGGER_FIELD_ITEM; }
bool eq(const Item *item, bool binary_cmp) const;
bool fix_fields(THD *, struct st_table_list *, Item **);
void print(String *str);
table_map used_tables() const { return (table_map)0L; }
void cleanup();
};
class Item_cache: public Item
{
protected:
......
sql/item_func.cc
View file @ 9ed038dd
......@@ -2563,6 +2563,16 @@ void Item_func_set_user_var::print(String *str)
}
void Item_func_set_user_var::print_as_stmt(String *str)
{
str->append("set @", 5);
str->append(name.str, name.length);
str->append(":=", 2);
args[0]->print(str);
str->append(')');
}
String *
Item_func_get_user_var::val_str(String *str)
{
......@@ -3296,6 +3306,11 @@ Item_func_sp::execute(Item **itp)
sp_change_security_context(thd, m_sp, &save_ctx);
#endif
/*
We don't need to surpress senfing of ok packet here (by setting
thd->net.no_send_ok to true), because we are not allowing statements
in functions now.
*/
res= m_sp->execute_function(thd, args, arg_count, itp);
#ifndef NO_EMBEDDED_ACCESS_CHECKS
......
sql/item_func.h
View file @ 9ed038dd
......@@ -945,6 +945,7 @@ public:
bool fix_fields(THD *thd, struct st_table_list *tables, Item **ref);
void fix_length_and_dec();
void print(String *str);
void print_as_stmt(String *str);
const char *func_name() const { return "set_user_var"; }
};
......
sql/lex.h
View file @ 9ed038dd
......@@ -167,6 +167,7 @@ static SYMBOL symbols[] = {
{ "DUMPFILE", SYM(DUMPFILE)},
{ "DUPLICATE", SYM(DUPLICATE_SYM)},
{ "DYNAMIC", SYM(DYNAMIC_SYM)},
{ "EACH", SYM(EACH_SYM)},
{ "ELSE", SYM(ELSE)},
{ "ELSEIF", SYM(ELSEIF_SYM)},
{ "ENABLE", SYM(ENABLE_SYM)},
......@@ -468,6 +469,7 @@ static SYMBOL symbols[] = {
{ "TO", SYM(TO_SYM)},
{ "TRAILING", SYM(TRAILING)},
{ "TRANSACTION", SYM(TRANSACTION_SYM)},
{ "TRIGGER", SYM(TRIGGER_SYM)},
{ "TRUE", SYM(TRUE_SYM)},
{ "TRUNCATE", SYM(TRUNCATE_SYM)},
{ "TYPE", SYM(TYPE_SYM)},
......
sql/mysql_priv.h
View file @ 9ed038dd
......@@ -471,6 +471,7 @@ int mysql_rm_table_part2_with_lock(THD *thd, TABLE_LIST *tables,
bool log_query);
int quick_rm_table(enum db_type base,const char *db,
const char *table_name);
void close_cached_table(THD *thd, TABLE *table);
bool mysql_rename_tables(THD *thd, TABLE_LIST *table_list);
bool mysql_change_db(THD *thd,const char *name);
void mysql_parse(THD *thd,char *inBuf,uint length);
......@@ -611,6 +612,7 @@ int mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, Item **conds);
int mysql_delete(THD *thd, TABLE_LIST *table, COND *conds, SQL_LIST *order,
ha_rows rows, ulong options);
int mysql_truncate(THD *thd, TABLE_LIST *table_list, bool dont_send_ok=0);
int mysql_create_or_drop_trigger(THD *thd, TABLE_LIST *tables, bool create);
TABLE *open_ltable(THD *thd, TABLE_LIST *table_list, thr_lock_type update);
TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT* mem,
bool *refresh);
......@@ -637,6 +639,10 @@ Field *find_field_in_table(THD *thd, TABLE_LIST *tables, const char *name,
bool check_grant_table, bool check_grant_view,
bool allow_rowid,
uint *cached_field_index_ptr);
Field *find_field_in_real_table(THD *thd, TABLE *table,
const char *name, uint length,
bool check_grants, bool allow_rowid,
uint *cached_field_index_ptr);
#ifdef HAVE_OPENSSL
#include <openssl/des.h>
struct st_des_keyblock
......
sql/parse_file.cc
View file @ 9ed038dd
......@@ -46,7 +46,7 @@ write_escaped_string(IO_CACHE *file, LEX_STRING *val_s)
{
/*
Should be in sync with read_escaped_string() and
parse_quated_escaped_string()
parse_quoted_escaped_string()
*/
switch(*ptr) {
case '\\': // escape character
......@@ -154,11 +154,10 @@ write_parameter(IO_CACHE *file, gptr base, File_option *parameter,
LEX_STRING *str;
while ((str= it++))
{
num.set((ulonglong)str->length, &my_charset_bin);
// ',' after string to detect list continuation
// We need ' ' after string to detect list continuation
if ((!first && my_b_append(file, (const byte *)" ", 1)) ||
my_b_append(file, (const byte *)"\'", 1) ||
my_b_append(file, (const byte *)str->str, str->length) ||
write_escaped_string(file, str) ||
my_b_append(file, (const byte *)"\'", 1))
{
DBUG_RETURN(TRUE);
......@@ -486,7 +485,7 @@ read_escaped_string(char *ptr, char *eol, LEX_STRING *str)
return TRUE;
/*
Should be in sync with write_escaped_string() and
parse_quated_escaped_string()
parse_quoted_escaped_string()
*/
switch(*ptr) {
case '\\':
......@@ -562,7 +561,7 @@ parse_escaped_string(char *ptr, char *end, MEM_ROOT *mem_root, LEX_STRING *str)
*/
static char *
parse_quated_escaped_string(char *ptr, char *end,
parse_quoted_escaped_string(char *ptr, char *end,
MEM_ROOT *mem_root, LEX_STRING *str)
{
char *eol;
......@@ -684,7 +683,6 @@ File_parser::parse(gptr base, MEM_ROOT *mem_root,
my_error(ER_FPARSER_ERROR_IN_PARAMETER, MYF(0),
parameter->name.str, line);
DBUG_RETURN(TRUE);
DBUG_RETURN(TRUE);
}
break;
}
......@@ -724,6 +722,7 @@ File_parser::parse(gptr base, MEM_ROOT *mem_root,
/*
TODO: remove play with mem_root, when List will be able
to store MEM_ROOT* pointer for list elements allocation
FIXME: we can't handle empty lists
*/
sql_mem= my_pthread_getspecific_ptr(MEM_ROOT*, THR_MALLOC);
list= (List<LEX_STRING>*)(base + parameter->offset);
......@@ -741,7 +740,7 @@ File_parser::parse(gptr base, MEM_ROOT *mem_root,
sizeof(LEX_STRING))) ||
list->push_back(str))
goto list_err;
if(!(ptr= parse_quated_escaped_string(ptr, end, mem_root, str)))
if(!(ptr= parse_quoted_escaped_string(ptr, end, mem_root, str)))
goto list_err_w_message;
switch (*ptr) {
case '\n':
......
sql/parse_file.h
View file @ 9ed038dd
......@@ -27,7 +27,8 @@ enum file_opt_type {
FILE_OPTIONS_REV, /* Revision version number (ulonglong) */
FILE_OPTIONS_TIMESTAMP, /* timestamp (LEX_STRING have to be
allocated with length 20 (19+1) */
FILE_OPTIONS_STRLIST /* list of strings (List<char*>) */
FILE_OPTIONS_STRLIST /* list of escaped strings
(List<LEX_STRING>) */
};
struct File_option
......
sql/share/czech/errmsg.txt
View file @ 9ed038dd
......@@ -366,3 +366,8 @@ character-set=latin2
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/danish/errmsg.txt
View file @ 9ed038dd
......@@ -360,3 +360,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/dutch/errmsg.txt
View file @ 9ed038dd
......@@ -368,3 +368,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/english/errmsg.txt
View file @ 9ed038dd
......@@ -357,3 +357,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/estonian/errmsg.txt
View file @ 9ed038dd
......@@ -362,3 +362,8 @@ character-set=latin7
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/french/errmsg.txt
View file @ 9ed038dd
......@@ -357,3 +357,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/german/errmsg.txt
View file @ 9ed038dd
......@@ -369,3 +369,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/greek/errmsg.txt
View file @ 9ed038dd
......@@ -357,3 +357,8 @@ character-set=greek
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/hungarian/errmsg.txt
View file @ 9ed038dd
......@@ -359,3 +359,8 @@ character-set=latin2
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/italian/errmsg.txt
View file @ 9ed038dd
......@@ -357,3 +357,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/japanese/errmsg.txt
View file @ 9ed038dd
......@@ -359,3 +359,8 @@ character-set=ujis
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/korean/errmsg.txt
View file @ 9ed038dd
......@@ -357,3 +357,8 @@ character-set=euckr
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/norwegian-ny/errmsg.txt
View file @ 9ed038dd
......@@ -359,3 +359,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/norwegian/errmsg.txt
View file @ 9ed038dd
......@@ -359,3 +359,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/polish/errmsg.txt
View file @ 9ed038dd
......@@ -361,3 +361,8 @@ character-set=latin2
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/portuguese/errmsg.txt
View file @ 9ed038dd
......@@ -358,3 +358,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/romanian/errmsg.txt
View file @ 9ed038dd
......@@ -361,3 +361,8 @@ character-set=latin2
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/russian/errmsg.txt
View file @ 9ed038dd
......@@ -359,3 +359,8 @@ character-set=koi8r
"View SELECT view "
" view ( )"
" view ()"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/serbian/errmsg.txt
View file @ 9ed038dd
......@@ -363,3 +363,8 @@ character-set=cp1250
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/slovak/errmsg.txt
View file @ 9ed038dd
......@@ -365,3 +365,8 @@ character-set=latin2
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/spanish/errmsg.txt
View file @ 9ed038dd
......@@ -359,3 +359,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/swedish/errmsg.txt
View file @ 9ed038dd
......@@ -357,3 +357,8 @@ character-set=latin1
"View's SELECT and view's field list have different column counts"
"View merge algorithm can't be used here for now (assumed undefined algorithm)"
"View being update does not have complete key of underlying table in it"
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/share/ukrainian/errmsg.txt
View file @ 9ed038dd
......@@ -362,3 +362,8 @@ character-set=koi8u
"View SELECT ̦ æ view Ҧ ˦˦ æ"
" view ( )"
"View, , ͦ æ(), Ҧ "
"Trigger already exists"
"Trigger does not exist"
"Trigger's '%-.64s' is view or temporary table"
"Updating of %s row is not allowed in %strigger"
"There is no %s row in %s trigger"
sql/sp_head.cc
View file @ 9ed038dd
......@@ -242,31 +242,43 @@ sp_head::init_strings(THD *thd, LEX *lex, sp_name *name)
/* During parsing, we must use thd->mem_root */
MEM_ROOT *root= &thd->mem_root;
DBUG_PRINT("info", ("name: %*.s%*s",
name->m_db.length, name->m_db.str,
name->m_name.length, name->m_name.str));
/* We have to copy strings to get them into the right memroot */
if (name->m_db.length == 0)
if (name)
{
DBUG_PRINT("info", ("name: %*.s%*s",
name->m_db.length, name->m_db.str,
name->m_name.length, name->m_name.str));
if (name->m_db.length == 0)
{
m_db.length= (thd->db ? strlen(thd->db) : 0);
m_db.str= strmake_root(root, (thd->db ? thd->db : ""), m_db.length);
}
else
{
m_db.length= name->m_db.length;
m_db.str= strmake_root(root, name->m_db.str, name->m_db.length);
}
m_name.length= name->m_name.length;
m_name.str= strmake_root(root, name->m_name.str, name->m_name.length);
if (name->m_qname.length == 0)
name->init_qname(thd);
m_qname.length= name->m_qname.length;
m_qname.str= strmake_root(root, name->m_qname.str, m_qname.length);
}
else
{
m_db.length= (thd->db ? strlen(thd->db) : 0);
m_db.str= strmake_root(root, (thd->db ? thd->db : ""), m_db.length);
}
else
if (m_param_begin && m_param_end)
{
m_db.length= name->m_db.length;
m_db.str= strmake_root(root, name->m_db.str, name->m_db.length);
m_params.length= m_param_end - m_param_begin;
m_params.str= strmake_root(root,
(char *)m_param_begin, m_params.length);
}
m_name.length= name->m_name.length;
m_name.str= strmake_root(root, name->m_name.str, name->m_name.length);
if (name->m_qname.length == 0)
name->init_qname(thd);
m_qname.length= name->m_qname.length;
m_qname.str= strmake_root(root, name->m_qname.str, m_qname.length);
m_params.length= m_param_end- m_param_begin;
m_params.str= strmake_root(root,
(char *)m_param_begin, m_params.length);
if (m_returns_begin && m_returns_end)
{
/* QQ KLUDGE: We can't seem to cut out just the type in the parser
......@@ -508,8 +520,10 @@ sp_head::execute_function(THD *thd, Item **argp, uint argcount, Item **resp)
thd->spcont= nctx;
ret= execute(thd);
if (ret == 0)
if (m_type == TYPE_ENUM_FUNCTION && ret == 0)
{
/* We need result only in function but not in trigger */
Item *it= nctx->get_result();
if (it)
......@@ -683,6 +697,9 @@ sp_head::reset_lex(THD *thd)
/* And keep the SP stuff too */
sublex->sphead= oldlex->sphead;
sublex->spcont= oldlex->spcont;
/* And trigger related stuff too */
sublex->trg_chistics= oldlex->trg_chistics;
sublex->trg_table= oldlex->trg_table;
mysql_init_query(thd, true); // Only init lex
sublex->sp_lex_in_use= FALSE;
DBUG_VOID_RETURN;
......@@ -1040,6 +1057,60 @@ sp_instr_set::print(String *str)
m_value->print(str);
}
//
// sp_instr_set_user_var
//
int
sp_instr_set_user_var::execute(THD *thd, uint *nextp)
{
int res= 0;
DBUG_ENTER("sp_instr_set_user_var::execute");
/*
It is ok to pass 0 as 3rd argument to fix_fields() since
Item_func_set_user_var::fix_fields() won't use it.
QQ: Still unsure what should we return in case of error 1 or -1 ?
*/
if (!m_set_var_item.fixed && m_set_var_item.fix_fields(thd, 0, 0) ||
m_set_var_item.check() || m_set_var_item.update())
res= -1;
*nextp= m_ip + 1;
DBUG_RETURN(res);
}
void
sp_instr_set_user_var::print(String *str)
{
m_set_var_item.print_as_stmt(str);
}
//
// sp_instr_set_trigger_field
//
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))
res= -1;
*nextp= m_ip + 1;
DBUG_RETURN(res);
}
void
sp_instr_set_trigger_field::print(String *str)
{
str->append("set ", 4);
trigger_field.print(str);
str->append(":=", 2);
value->print(str);
}
//
// sp_instr_jump
//
......
sql/sp_head.h
View file @ 9ed038dd
......@@ -28,6 +28,7 @@
// in the CREATE TABLE command.
#define TYPE_ENUM_FUNCTION 1
#define TYPE_ENUM_PROCEDURE 2
#define TYPE_ENUM_TRIGGER 3
Item_result
sp_map_result_type(enum enum_field_types type);
......@@ -342,6 +343,71 @@ private:
}; // class sp_instr_set : public sp_instr
/*
Set user variable instruction.
Used in functions and triggers to set user variables because we don't
want use sp_instr_stmt + "SET @a:=..." statement in this case since
latter will close all tables and thus will ruin execution of statement
calling/invoking this function/trigger.
*/
class sp_instr_set_user_var : public sp_instr
{
sp_instr_set_user_var(const sp_instr_set_user_var &);
void operator=(sp_instr_set_user_var &);
public:
sp_instr_set_user_var(uint ip, LEX_STRING var, Item *val)
: sp_instr(ip), m_set_var_item(var, val)
{}
virtual ~sp_instr_set_user_var()
{}
virtual int execute(THD *thd, uint *nextp);
virtual void print(String *str);
private:
Item_func_set_user_var m_set_var_item;
}; // class sp_instr_set_user_var : public sp_instr
/*
Set NEW/OLD row field value instruction. Used in triggers.
*/
class sp_instr_set_trigger_field : public sp_instr
{
sp_instr_set_trigger_field(const sp_instr_set_trigger_field &);
void operator=(sp_instr_set_trigger_field &);
public:
sp_instr_set_trigger_field(uint ip, LEX_STRING field_name, Item *val)
: sp_instr(ip),
trigger_field(Item_trigger_field::NEW_ROW, field_name.str),
value(val)
{}
virtual ~sp_instr_set_trigger_field()
{}
virtual int execute(THD *thd, uint *nextp);
virtual void print(String *str);
bool setup_field(THD *thd, TABLE *table, enum trg_event_type event)
{
return trigger_field.setup_field(thd, table, event);
}
private:
Item_trigger_field trigger_field;
Item *value;
}; // class sp_instr_trigger_field : public sp_instr
class sp_instr_jump : public sp_instr
{
sp_instr_jump(const sp_instr_jump &); /* Prevent use of these */
......
sql/sql_base.cc
View file @ 9ed038dd
......@@ -20,6 +20,8 @@
#include "mysql_priv.h"
#include "sql_acl.h"
#include "sql_select.h"
#include "sp_head.h"
#include "sql_trigger.h"
#include <m_ctype.h>
#include <my_dir.h>
#include <hash.h>
......@@ -41,10 +43,6 @@ static my_bool open_new_frm(const char *path, const char *alias,
uint db_stat, uint prgflag,
uint ha_open_flags, TABLE *outparam,
TABLE_LIST *table_desc, MEM_ROOT *mem_root);
static Field *find_field_in_real_table(THD *thd, TABLE *table,
const char *name, uint length,
bool check_grants, bool allow_rowid,
uint *cached_field_index_ptr);
extern "C" byte *table_cache_key(const byte *record,uint *length,
my_bool not_used __attribute__((unused)))
......@@ -209,6 +207,7 @@ OPEN_TABLE_LIST *list_open_tables(THD *thd, const char *wild)
void intern_close_table(TABLE *table)
{ // Free all structures
free_io_cache(table);
delete table->triggers;
if (table->file)
VOID(closefrm(table)); // close file
}
......@@ -790,6 +789,7 @@ TABLE *reopen_name_locked_table(THD* thd, TABLE_LIST* table_list)
!(table->table_cache_key =memdup_root(&table->mem_root,(char*) key,
key_length)))
{
delete table->triggers;
closefrm(table);
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(0);
......@@ -1053,6 +1053,7 @@ bool reopen_table(TABLE *table,bool locked)
if (!(tmp.table_cache_key= memdup_root(&tmp.mem_root,db,
table->key_length)))
{
delete tmp.triggers;
closefrm(&tmp); // End of memory
goto end;
}
......@@ -1081,6 +1082,7 @@ bool reopen_table(TABLE *table,bool locked)
tmp.next= table->next;
tmp.prev= table->prev;
delete table->triggers;
if (table->file)
VOID(closefrm(table)); // close file, free everything
......@@ -1469,6 +1471,9 @@ static int open_unireg_entry(THD *thd, TABLE *entry, const char *db,
if (error == 5)
DBUG_RETURN(0); // we have just opened VIEW
if (Table_triggers_list::check_n_load(thd, db, name, entry))
goto err;
/*
If we are here, there was no fatal error (but error may be still
unitialized).
......@@ -1497,6 +1502,7 @@ static int open_unireg_entry(THD *thd, TABLE *entry, const char *db,
*/
sql_print_error("Error: when opening HEAP table, could not allocate \
memory to write 'DELETE FROM `%s`.`%s`' to the binary log",db,name);
delete entry->triggers;
if (entry->file)
closefrm(entry);
goto err;
......@@ -1998,10 +2004,10 @@ Field *find_field_in_table(THD *thd, TABLE_LIST *table_list,
# pointer to field
*/
static Field *find_field_in_real_table(THD *thd, TABLE *table,
const char *name, uint length,
bool check_grants, bool allow_rowid,
uint *cached_field_index_ptr)
Field *find_field_in_real_table(THD *thd, TABLE *table,
const char *name, uint length,
bool check_grants, bool allow_rowid,
uint *cached_field_index_ptr)
{
Field **field_ptr, *field;
uint cached_field_index= *cached_field_index_ptr;
......
sql/sql_delete.cc
View file @ 9ed038dd
......@@ -26,6 +26,8 @@
#include "mysql_priv.h"
#include "ha_innodb.h"
#include "sql_select.h"
#include "sp_head.h"
#include "sql_trigger.h"
int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, SQL_LIST *order,
ha_rows limit, ulong options)
......@@ -160,6 +162,11 @@ int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, SQL_LIST *order,
// thd->net.report_error is tested to disallow delete row on error
if (!(select && select->skip_record())&& !thd->net.report_error )
{
if (table->triggers)
table->triggers->process_triggers(thd, TRG_EVENT_DELETE,
TRG_ACTION_BEFORE);
if (!(error=table->file->delete_row(table->record[0])))
{
deleted++;
......@@ -183,6 +190,10 @@ int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, SQL_LIST *order,
error= 1;
break;
}
if (table->triggers)
table->triggers->process_triggers(thd, TRG_EVENT_DELETE,
TRG_ACTION_AFTER);
}
else
table->file->unlock_row(); // Row failed selection, release lock on it
......
sql/sql_insert.cc
View file @ 9ed038dd
......@@ -19,6 +19,8 @@
#include "mysql_priv.h"
#include "sql_acl.h"
#include "sp_head.h"
#include "sql_trigger.h"
static int check_null_fields(THD *thd,TABLE *entry);
#ifndef EMBEDDED_LIBRARY
......@@ -299,6 +301,12 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list,
break;
}
}
// FIXME: Actually we should do this before check_null_fields.
// Or even go into write_record ?
if (table->triggers)
table->triggers->process_triggers(thd, TRG_EVENT_INSERT, TRG_ACTION_BEFORE);
#ifndef EMBEDDED_LIBRARY
if (lock_type == TL_WRITE_DELAYED)
{
......@@ -321,6 +329,9 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list,
id= thd->last_insert_id;
}
thd->row_count++;
if (table->triggers)
table->triggers->process_triggers(thd, TRG_EVENT_INSERT, TRG_ACTION_AFTER);
}
/*
......
sql/sql_lex.cc
View file @ 9ed038dd
......@@ -24,6 +24,12 @@
#include "sp.h"
#include "sp_head.h"
/*
We are using pointer to this variable for distinguishing between assignment
to NEW row field (when parsing trigger definition) and structured variable.
*/
sys_var_long_ptr trg_new_row_fake_var(0, 0);
/* Macros to look like lex */
#define yyGet() *(lex->ptr++)
......@@ -130,6 +136,7 @@ LEX *lex_start(THD *thd, uchar *buf,uint length)
lex->duplicates= DUP_ERROR;
lex->sphead= NULL;
lex->spcont= NULL;
lex->trg_table= NULL;
extern byte *sp_lex_spfuns_key(const byte *ptr, uint *plen, my_bool first);
hash_free(&lex->spfuns);
......
sql/sql_lex.h
View file @ 9ed038dd
......@@ -85,6 +85,7 @@ enum enum_sql_command {
SQLCOM_SHOW_STATUS_PROC, SQLCOM_SHOW_STATUS_FUNC,
SQLCOM_PREPARE, SQLCOM_EXECUTE, SQLCOM_DEALLOCATE_PREPARE,
SQLCOM_CREATE_VIEW, SQLCOM_DROP_VIEW,
SQLCOM_CREATE_TRIGGER, SQLCOM_DROP_TRIGGER,
/* This should be the last !!! */
SQLCOM_END
};
......@@ -606,6 +607,15 @@ struct st_sp_chistics
bool detistic;
};
struct st_trg_chistics
{
enum trg_action_time_type action_time;
enum trg_event_type event;
};
extern sys_var_long_ptr trg_new_row_fake_var;
/* The state of the lex parsing. This is saved in the THD struct */
typedef struct st_lex
......@@ -710,6 +720,14 @@ typedef struct st_lex
rexecuton
*/
bool empty_field_list_on_rset;
/* Characterstics of trigger being created */
st_trg_chistics trg_chistics;
/*
Points to table being opened when we are parsing trigger definition
while opening table. 0 if we are parsing user provided CREATE TRIGGER
or any other statement. Used for NEW/OLD row field lookup in trigger.
*/
TABLE *trg_table;
st_lex()
{
......
sql/sql_parse.cc
View file @ 9ed038dd
......@@ -3828,6 +3828,20 @@ purposes internal to the MySQL server", MYF(0));
res= mysql_drop_view(thd, first_table, thd->lex->drop_mode);
break;
}
case SQLCOM_CREATE_TRIGGER:
{
/* We don't care much about trigger body at that point */
delete lex->sphead;
lex->sphead= 0;
res= mysql_create_or_drop_trigger(thd, all_tables, 1);
break;
}
case SQLCOM_DROP_TRIGGER:
{
res= mysql_create_or_drop_trigger(thd, all_tables, 0);
break;
}
default: /* Impossible */
send_ok(thd);
break;
......
sql/sql_table.cc
View file @ 9ed038dd
......@@ -1509,7 +1509,7 @@ static void wait_while_table_is_used(THD *thd,TABLE *table,
Win32 clients must also have a WRITE LOCK on the table !
*/
static bool close_cached_table(THD *thd, TABLE *table)
void close_cached_table(THD *thd, TABLE *table)
{
DBUG_ENTER("close_cached_table");
......@@ -1525,7 +1525,6 @@ static bool close_cached_table(THD *thd, TABLE *table)
/* When lock on LOCK_open is freed other threads can continue */
pthread_cond_broadcast(&COND_refresh);
DBUG_RETURN(0);
}
static int send_check_errmsg(THD *thd, TABLE_LIST* table,
......@@ -3130,12 +3129,7 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
close the original table at before doing the rename
*/
table_name=thd->strdup(table_name); // must be saved
if (close_cached_table(thd, table))
{ // Aborted
VOID(quick_rm_table(new_db_type,new_db,tmp_name));
VOID(pthread_mutex_unlock(&LOCK_open));
goto err;
}
close_cached_table(thd, table);
table=0; // Marker that table is closed
}
#if (!defined( __WIN__) && !defined( __EMX__) && !defined( OS2))
......
sql/sql_trigger.cc 0 → 100644
View file @ 9ed038dd
#include "mysql_priv.h"
#include "sp_head.h"
#include "sql_trigger.h"
#include "parse_file.h"
static const LEX_STRING triggers_file_type= {(char *)"TRIGGERS", 8};
static const char * const triggers_file_ext= ".TRG";
/*
Table of .TRG file field descriptors.
We have here only one field now because in nearest future .TRG
files will be merged into .FRM files (so we don't need something
like md5 or created fields).
*/
static File_option triggers_file_parameters[]=
{
{{(char*)"triggers", 8}, offsetof(Table_triggers_list, definitions_list),
FILE_OPTIONS_STRLIST},
{{NULL, 0}, 0, FILE_OPTIONS_STRING}
};
/*
Create or drop trigger for table.
SYNOPSIS
mysql_create_or_drop_trigger()
thd - current thread context (including trigger definition in LEX)
tables - table list containing one table for which trigger is created.
create - whenever we create (true) or drop (false) trigger
NOTE
This function is mainly responsible for opening and locking of table and
invalidation of all its instances in table cache after trigger creation.
Real work on trigger creation/dropping is done inside Table_triggers_list
methods.
RETURN VALUE
0 - Success, non-0 in case of error.
*/
int mysql_create_or_drop_trigger(THD *thd, TABLE_LIST *tables, bool create)
{
TABLE *table;
int result= 0;
DBUG_ENTER("mysql_create_or_drop_trigger");
/*
QQ: This function could be merged in mysql_alter_table() function
But do we want this ?
*/
if (open_and_lock_tables(thd, tables))
DBUG_RETURN(-1);
// TODO: We should check if user has TRIGGER privilege for table here.
table= tables->table;
/*
We do not allow creation of triggers on views or temporary tables.
We have to do this check here and not in
Table_triggers_list::create_trigger() because we want to avoid messing
with table cash for views and temporary tables.
*/
if (tables->view || table->tmp_table != NO_TMP_TABLE)
{
my_error(ER_TRG_ON_VIEW_OR_TEMP_TABLE, MYF(0), tables->alias);
DBUG_RETURN(-1);
}
if (!table->triggers)
{
if (!create)
{
my_error(ER_TRG_DOES_NOT_EXIST, MYF(0));
DBUG_RETURN(-1);
}
if (!(table->triggers= new (&table->mem_root) Table_triggers_list()))
DBUG_RETURN(-1);
}
/*
We don't want perform our operations while global read lock is held
so we have to wait until its end and then prevent it from occuring
again until we are done. (Acquiring LOCK_open is not enough because
global read lock is held without helding LOCK_open).
*/
if (wait_if_global_read_lock(thd, 0))
DBUG_RETURN(-1);
VOID(pthread_mutex_lock(&LOCK_open));
if ((create ? table->triggers->create_trigger(thd, tables):
table->triggers->drop_trigger(thd, tables)))
result= -1;
/* It is sensible to invalidate table in any case */
close_cached_table(thd, table);
VOID(pthread_mutex_unlock(&LOCK_open));
start_waiting_global_read_lock(thd);
if (!result)
send_ok(thd);
DBUG_RETURN(result);
}
/*
Create trigger for table.
SYNOPSIS
create_trigger()
thd - current thread context (including trigger definition in LEX)
tables - table list containing one open table for which trigger is
created.
RETURN VALUE
False - success
True - error
*/
bool Table_triggers_list::create_trigger(THD *thd, TABLE_LIST *tables)
{
LEX *lex= thd->lex;
TABLE *table= tables->table;
char dir_buff[FN_REFLEN], file_buff[FN_REFLEN];
LEX_STRING dir, file;
MEM_ROOT *old_global_root;
LEX_STRING *trg_def, *name;
List_iterator_fast<LEX_STRING> it(names_list);
/* We don't allow creation of several triggers of the same type yet */
if (bodies[lex->trg_chistics.event][lex->trg_chistics.action_time])
{
my_error(ER_TRG_ALREADY_EXISTS, MYF(0));
return 1;
}
/* Let us check if trigger with the same name exists */
while ((name= it++))
{
if (my_strcasecmp(system_charset_info, lex->name_and_length.str,
name->str) == 0)
{
my_error(ER_TRG_ALREADY_EXISTS, MYF(0));
return 1;
}
}
/*
Here we are creating file with triggers and save all triggers in it.
sql_create_definition_file() files handles renaming and backup of older
versions
*/
strxnmov(dir_buff, FN_REFLEN, mysql_data_home, "/", tables->db, "/", NullS);
dir.length= unpack_filename(dir_buff, dir_buff);
dir.str= dir_buff;
file.length= strxnmov(file_buff, FN_REFLEN, tables->real_name,
triggers_file_ext, NullS) - file_buff;
file.str= file_buff;
old_global_root= my_pthread_getspecific_ptr(MEM_ROOT*, THR_MALLOC);
my_pthread_setspecific_ptr(THR_MALLOC, &table->mem_root);
/*
Soon we will invalidate table object and thus Table_triggers_list object
so don't care about place to which trg_def->ptr points and other
invariants (e.g. we don't bother to update names_list)
QQ: Hmm... probably we should not care about setting up active thread
mem_root too.
*/
if (!(trg_def= (LEX_STRING *)alloc_root(&table->mem_root,
sizeof(LEX_STRING))) ||
definitions_list.push_back(trg_def))
{
my_pthread_setspecific_ptr(THR_MALLOC, old_global_root);
return 1;
}
trg_def->str= thd->query;
trg_def->length= thd->query_length;
my_pthread_setspecific_ptr(THR_MALLOC, old_global_root);
return sql_create_definition_file(&dir, &file, &triggers_file_type,
(gptr)this, triggers_file_parameters, 3);
}
/*
Drop trigger for table.
SYNOPSIS
drop_trigger()
thd - current thread context (including trigger definition in LEX)
tables - table list containing one open table for which trigger is
dropped.
RETURN VALUE
False - success
True - error
*/
bool Table_triggers_list::drop_trigger(THD *thd, TABLE_LIST *tables)
{
LEX *lex= thd->lex;
LEX_STRING *name;
List_iterator_fast<LEX_STRING> it_name(names_list);
List_iterator<LEX_STRING> it_def(definitions_list);
while ((name= it_name++))
{
it_def++;
if (my_strcasecmp(system_charset_info, lex->name_and_length.str,
name->str) == 0)
{
/*
Again we don't care much about other things required for
clean trigger removing since table will be reopened anyway.
*/
it_def.remove();
if (definitions_list.is_empty())
{
char path[FN_REFLEN];
/*
TODO: Probably instead of removing .TRG file we should move
to archive directory but this should be done as part of
parse_file.cc functionality (because we will need it
elsewhere).
*/
strxnmov(path, FN_REFLEN, mysql_data_home, "/", tables->db, "/",
tables->real_name, triggers_file_ext, NullS);
unpack_filename(path, path);
return my_delete(path, MYF(MY_WME));
}
else
{
char dir_buff[FN_REFLEN], file_buff[FN_REFLEN];
LEX_STRING dir, file;
strxnmov(dir_buff, FN_REFLEN, mysql_data_home, "/", tables->db,
"/", NullS);
dir.length= unpack_filename(dir_buff, dir_buff);
dir.str= dir_buff;
file.length= strxnmov(file_buff, FN_REFLEN, tables->real_name,
triggers_file_ext, NullS) - file_buff;
file.str= file_buff;
return sql_create_definition_file(&dir, &file, &triggers_file_type,
(gptr)this,
triggers_file_parameters, 3);
}
}
}
my_error(ER_TRG_DOES_NOT_EXIST, MYF(0));
return 1;
}
Table_triggers_list::~Table_triggers_list()
{
for (int i= 0; i < 3; i++)
for (int j= 0; j < 2; j++)
delete bodies[i][j];
if (old_field)
for (Field **fld_ptr= old_field; *fld_ptr; fld_ptr++)
delete *fld_ptr;
}
/*
Check whenever .TRG file for table exist and load all triggers it contains.
SYNOPSIS
check_n_load()
thd - current thread context
db - table's database name
table_name - table's name
table - pointer to table object
RETURN VALUE
False - success
True - error
*/
bool Table_triggers_list::check_n_load(THD *thd, const char *db,
const char *table_name, TABLE *table)
{
char path_buff[FN_REFLEN];
LEX_STRING path;
File_parser *parser;
MEM_ROOT *old_global_mem_root;
DBUG_ENTER("Table_triggers_list::check_n_load");
strxnmov(path_buff, FN_REFLEN, mysql_data_home, "/", db, "/", table_name,
triggers_file_ext, NullS);
path.length= unpack_filename(path_buff, path_buff);
path.str= path_buff;
// QQ: should we analyze errno somehow ?
if (access(path_buff, F_OK))
DBUG_RETURN(0);
/*
File exists so we got to load triggers
FIXME: A lot of things to do here e.g. how about other funcs and being
more paranoical ?
*/
if ((parser= sql_parse_prepare(&path, &table->mem_root, 1)))
{
if (!strncmp(triggers_file_type.str, parser->type()->str,
parser->type()->length))
{
int i;
Table_triggers_list *triggers_info=
new (&table->mem_root) Table_triggers_list();
if (!triggers_info)
DBUG_RETURN(1);
if (parser->parse((gptr)triggers_info, &table->mem_root,
triggers_file_parameters, 1))
DBUG_RETURN(1);
table->triggers= triggers_info;
/*
We have to prepare array of Field objects which will represent OLD.*
row values by referencing to record[1] instead of record[0]
TODO: This could be avoided if there is no ON UPDATE trigger.
*/
if (!(triggers_info->old_field=
(Field **)alloc_root(&table->mem_root, (table->fields + 1) *
sizeof(Field*))))
DBUG_RETURN(1);
for (i= 0; i < table->fields; i++)
{
/*
QQ: it is supposed that it is ok to use this function for field
cloning...
*/
if (!(triggers_info->old_field[i]=
table->field[i]->new_field(&table->mem_root, table)))
DBUG_RETURN(1);
triggers_info->old_field[i]->move_field((my_ptrdiff_t)
(table->record[1] -
table->record[0]));
}
triggers_info->old_field[i]= 0;
List_iterator_fast<LEX_STRING> it(triggers_info->definitions_list);
LEX_STRING *trg_create_str, *trg_name_str;
char *trg_name_buff;
LEX *old_lex= thd->lex, lex;
thd->lex= &lex;
while ((trg_create_str= it++))
{
lex_start(thd, (uchar*)trg_create_str->str, trg_create_str->length);
mysql_init_query(thd, true);
lex.trg_table= table;
if (yyparse((void *)thd) || thd->is_fatal_error)
{
/*
Free lex associated resources
QQ: Do we really need all this stuff here ?
*/
if (lex.sphead)
{
if (&lex != thd->lex)
thd->lex->sphead->restore_lex(thd);
delete lex.sphead;
}
goto err_with_lex_cleanup;
}
triggers_info->bodies[lex.trg_chistics.event]
[lex.trg_chistics.action_time]= lex.sphead;
lex.sphead= 0;
if (!(trg_name_buff= alloc_root(&table->mem_root,
sizeof(LEX_STRING) +
lex.name_and_length.length + 1)))
goto err_with_lex_cleanup;
trg_name_str= (LEX_STRING *)trg_name_buff;
trg_name_buff+= sizeof(LEX_STRING);
memcpy(trg_name_buff, lex.name_and_length.str,
lex.name_and_length.length + 1);
trg_name_str->str= trg_name_buff;
trg_name_str->length= lex.name_and_length.length;
old_global_mem_root= my_pthread_getspecific_ptr(MEM_ROOT*, THR_MALLOC);
my_pthread_setspecific_ptr(THR_MALLOC, &table->mem_root);
if (triggers_info->names_list.push_back(trg_name_str))
goto err_with_lex_cleanup;
my_pthread_setspecific_ptr(THR_MALLOC, old_global_mem_root);
lex_end(&lex);
}
thd->lex= old_lex;
DBUG_RETURN(0);
err_with_lex_cleanup:
// QQ: anything else ?
lex_end(&lex);
thd->lex= old_lex;
DBUG_RETURN(1);
}
/*
We don't care about this error message much because .TRG files will
be merged into .FRM anyway.
*/
my_error(ER_WRONG_OBJECT, MYF(0), table_name, triggers_file_ext, "TRIGGER");
DBUG_RETURN(1);
}
DBUG_RETURN(1);
}
sql/sql_trigger.h 0 → 100644
View file @ 9ed038dd
/*
This class holds all information about triggers of table.
QQ: Will it be merged into TABLE in future ?
*/
class Table_triggers_list: public Sql_alloc
{
/* Triggers as SPs grouped by event, action_time */
sp_head *bodies[3][2];
/*
Copy of TABLE::Field array with field pointers set to old version
of record, used for OLD values in trigger on UPDATE.
*/
Field **old_field;
/*
Names of triggers.
Should correspond to order of triggers on definitions_list,
used in CREATE/DROP TRIGGER for looking up trigger by name.
*/
List<LEX_STRING> names_list;
public:
/*
Field responsible for storing triggers definitions in file.
It have to be public because we are using it directly from parser.
*/
List<LEX_STRING> definitions_list;
Table_triggers_list():
old_field(0)
{
bzero((char *)bodies, sizeof(bodies));
}
~Table_triggers_list();
bool create_trigger(THD *thd, TABLE_LIST *table);
bool drop_trigger(THD *thd, TABLE_LIST *table);
bool process_triggers(THD *thd, trg_event_type event,
trg_action_time_type time_type)
{
int res= 0;
if (bodies[event][time_type])
{
/*
Similar to function invocation we don't need to surpress sending of
ok packets here because don't allow execute statements from trigger.
FIXME: We should juggle with security context here (because trigger
should be invoked with creator rights).
*/
res= bodies[event][time_type]->execute_function(thd, 0, 0, 0);
}
return res;
}
static bool check_n_load(THD *thd, const char *db, const char *table_name,
TABLE *table);
friend class Item_trigger_field;
};
sql/sql_update.cc
View file @ 9ed038dd
......@@ -23,6 +23,8 @@
#include "mysql_priv.h"
#include "sql_acl.h"
#include "sql_select.h"
#include "sp_head.h"
#include "sql_trigger.h"
static bool safe_update_on_fly(JOIN_TAB *join_tab, List<Item> *fields);
......@@ -341,6 +343,10 @@ int mysql_update(THD *thd,
if (fill_record(fields,values, 0) || thd->net.report_error)
break; /* purecov: inspected */
found++;
if (table->triggers)
table->triggers->process_triggers(thd, TRG_EVENT_UPDATE, TRG_ACTION_BEFORE);
if (compare_record(table, query_id))
{
if (!(error=table->file->update_row((byte*) table->record[1],
......@@ -356,6 +362,10 @@ int mysql_update(THD *thd,
break;
}
}
if (table->triggers)
table->triggers->process_triggers(thd, TRG_EVENT_UPDATE, TRG_ACTION_AFTER);
if (!--limit && using_limit)
{
error= -1; // Simulate end of file
......
sql/sql_yacc.yy
View file @ 9ed038dd
......@@ -242,6 +242,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
%token DISTINCT
%token DUPLICATE_SYM
%token DYNAMIC_SYM
%token EACH_SYM
%token ENABLE_SYM
%token ENCLOSED
%token ESCAPED
......@@ -411,6 +412,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
%token TO_SYM
%token TRAILING
%token TRANSACTION_SYM
%token TRIGGER_SYM
%token TRUE_SYM
%token TYPE_SYM
%token TYPES_SYM
......@@ -1200,6 +1202,57 @@ create:
}
opt_view_list AS select_init check_option
{}
| CREATE TRIGGER_SYM ident trg_action_time trg_event
ON table_ident FOR_SYM EACH_SYM ROW_SYM
{
LEX *lex= Lex;
sp_head *sp;
lex->name_and_length= $3;
/* QQ: Could we loosen lock type in certain cases ? */
if (!lex->select_lex.add_table_to_list(YYTHD, $7,
(LEX_STRING*) 0,
TL_OPTION_UPDATING,
TL_WRITE))
YYABORT;
if (lex->sphead)
{
net_printf(YYTHD, ER_SP_NO_RECURSIVE_CREATE, "TRIGGER");
YYABORT;
}
sp= new sp_head();
sp->reset_thd_mem_root(YYTHD);
sp->init(lex);
sp->m_type= TYPE_ENUM_TRIGGER;
lex->sphead= sp;
/*
We have to turn of CLIENT_MULTI_QUERIES while parsing a
stored procedure, otherwise yylex will chop it into pieces
at each ';'.
*/
sp->m_old_cmq= YYTHD->client_capabilities & CLIENT_MULTI_QUERIES;
YYTHD->client_capabilities &= ~CLIENT_MULTI_QUERIES;
bzero((char *)&lex->sp_chistics, sizeof(st_sp_chistics));
lex->sphead->m_chistics= &lex->sp_chistics;
lex->sphead->m_body_begin= lex->tok_start;
}
sp_proc_stmt
{
LEX *lex= Lex;
sp_head *sp= lex->sphead;
lex->sql_command= SQLCOM_CREATE_TRIGGER;
sp->init_strings(YYTHD, lex, NULL);
/* Restore flag if it was cleared above */
if (sp->m_old_cmq)
YYTHD->client_capabilities |= CLIENT_MULTI_QUERIES;
sp->restore_thd_mem_root(YYTHD);
}
;
sp_name:
......@@ -1730,14 +1783,14 @@ sp_proc_stmt:
if (lex->sql_command != SQLCOM_SET_OPTION ||
! lex->var_list.is_empty())
{
/* Currently we can't handle queries inside a FUNCTION,
** because of the way table locking works.
** This is unfortunate, and limits the usefulness of functions
** a great deal, but it's nothing we can do about this at the
** moment.
*/
if (lex->sphead->m_type == TYPE_ENUM_FUNCTION &&
lex->sql_command != SQLCOM_SET_OPTION)
/*
Currently we can't handle queries inside a FUNCTION or
TRIGGER, because of the way table locking works. This is
unfortunate, and limits the usefulness of functions and
especially triggers a tremendously, but it's nothing we
can do about this at the moment.
*/
if (lex->sphead->m_type != TYPE_ENUM_PROCEDURE)
{
send_error(YYTHD, ER_SP_BADSTATEMENT);
YYABORT;
......@@ -2155,6 +2208,22 @@ sp_unlabeled_control:
}
;
trg_action_time:
BEFORE_SYM
{ Lex->trg_chistics.action_time= TRG_ACTION_BEFORE; }
| AFTER_SYM
{ Lex->trg_chistics.action_time= TRG_ACTION_AFTER; }
;
trg_event:
INSERT
{ Lex->trg_chistics.event= TRG_EVENT_INSERT; }
| UPDATE_SYM
{ Lex->trg_chistics.event= TRG_EVENT_UPDATE; }
| DELETE_SYM
{ Lex->trg_chistics.event= TRG_EVENT_DELETE; }
;
create2:
'(' create2a {}
| opt_create_table_options create3 {}
......@@ -5210,7 +5279,21 @@ drop:
lex->sql_command= SQLCOM_DROP_VIEW;
lex->drop_if_exists= $3;
}
;
| DROP TRIGGER_SYM ident '.' ident
{
LEX *lex= Lex;
lex->sql_command= SQLCOM_DROP_TRIGGER;
/* QQ: Could we loosen lock type in certain cases ? */
if (!lex->select_lex.add_table_to_list(YYTHD,
new Table_ident($3),
(LEX_STRING*) 0,
TL_OPTION_UPDATING,
TL_WRITE))
YYABORT;
lex->name_and_length= $5;
}
;
table_list:
table_name
......@@ -6200,18 +6283,70 @@ simple_ident_q:
{
THD *thd= YYTHD;
LEX *lex= thd->lex;
SELECT_LEX *sel= lex->current_select;
if (sel->no_table_names_allowed)
{
my_printf_error(ER_TABLENAME_NOT_ALLOWED_HERE,
ER(ER_TABLENAME_NOT_ALLOWED_HERE),
MYF(0), $1.str, thd->where);
}
$$= (sel->parsing_place != SELECT_LEX_NODE::IN_HAVING ||
sel->get_in_sum_expr() > 0) ?
(Item*) new Item_field(NullS,$1.str,$3.str) :
(Item*) new Item_ref(0,0,NullS,$1.str,$3.str);
}
/*
FIXME This will work ok in simple_ident_nospvar case because
we can't meet simple_ident_nospvar in trigger now. But it
should be changed in future.
*/
if (lex->sphead && lex->sphead->m_type == TYPE_ENUM_TRIGGER &&
(!my_strcasecmp(system_charset_info, $1.str, "NEW") ||
!my_strcasecmp(system_charset_info, $1.str, "OLD")))
{
bool new_row= ($1.str[0]=='N' || $1.str[0]=='n');
if (lex->trg_chistics.event == TRG_EVENT_INSERT &&
!new_row)
{
net_printf(YYTHD, ER_TRG_NO_SUCH_ROW_IN_TRG, "OLD",
"on INSERT");
YYABORT;
}
if (lex->trg_chistics.event == TRG_EVENT_DELETE &&
new_row)
{
net_printf(YYTHD, ER_TRG_NO_SUCH_ROW_IN_TRG, "NEW",
"on DELETE");
YYABORT;
}
Item_trigger_field *trg_fld=
new Item_trigger_field(new_row ? Item_trigger_field::NEW_ROW :
Item_trigger_field::OLD_ROW,
$3.str);
if (lex->trg_table &&
trg_fld->setup_field(thd, lex->trg_table,
lex->trg_chistics.event))
{
/*
FIXME. Far from perfect solution. See comment for
"SET NEW.field_name:=..." for more info.
*/
net_printf(YYTHD, ER_BAD_FIELD_ERROR, $3.str,
new_row ? "NEW": "OLD");
YYABORT;
}
$$= (Item *)trg_fld;
}
else
{
SELECT_LEX *sel= lex->current_select;
if (sel->no_table_names_allowed)
{
my_printf_error(ER_TABLENAME_NOT_ALLOWED_HERE,
ER(ER_TABLENAME_NOT_ALLOWED_HERE),
MYF(0), $1.str, thd->where);
}
$$= (sel->parsing_place != SELECT_LEX_NODE::IN_HAVING ||
sel->get_in_sum_expr() > 0) ?
(Item*) new Item_field(NullS,$1.str,$3.str) :
(Item*) new Item_ref(0,0,NullS,$1.str,$3.str);
}
}
| '.' ident '.' ident
{
THD *thd= YYTHD;
......@@ -6640,13 +6775,74 @@ opt_var_ident_type:
option_value:
'@' ident_or_text equal expr
{
Lex->var_list.push_back(new set_var_user(new Item_func_set_user_var($2,$4)));
LEX *lex= Lex;
if (lex->sphead && lex->sphead->m_type != TYPE_ENUM_PROCEDURE)
{
/*
We have to use special instruction in functions and triggers
because sp_instr_stmt will close all tables and thus ruin
execution of statement invoking function or trigger.
*/
sp_instr_set_user_var *i=
new sp_instr_set_user_var(lex->sphead->instructions(),
$2, $4);
lex->sphead->add_instr(i);
}
else
lex->var_list.push_back(new set_var_user(new Item_func_set_user_var($2,$4)));
}
| internal_variable_name equal set_expr_or_default
{
LEX *lex=Lex;
if ($1.var)
if ($1.var == &trg_new_row_fake_var)
{
/* We are in trigger and assigning value to field of new row */
Item *it;
sp_instr_set_trigger_field *i;
if ($3 && $3->type() == Item::SUBSELECT_ITEM)
{ /*
QQ For now, just disallow subselects as values
Unfortunately this doesn't helps in case when we have
subselect deeper in expression.
*/
send_error(YYTHD, ER_SP_SUBSELECT_NYI);
YYABORT;
}
if ($3)
it= $3;
else
{
/* QQ: Shouldn't this be field's default value ? */
it= new Item_null();
}
i= new sp_instr_set_trigger_field(lex->sphead->instructions(),
$1.base_name, it);
if (lex->trg_table && i->setup_field(YYTHD, lex->trg_table,
lex->trg_chistics.event))
{
/*
FIXME. Now we are catching this kind of errors only
during opening tables. But this doesn't save us from most
common user error - misspelling field name, because we
will bark too late in this case... Moreover it is easy to
make table unusable with such kind of error...
So in future we either have to parse trigger definition
second time during create trigger or gather all trigger
fields in one list and perform setup_field() for them as
separate stage.
Error message also should be improved.
*/
net_printf(YYTHD, ER_BAD_FIELD_ERROR, $1.base_name, "NEW");
YYABORT;
}
lex->sphead->add_instr(i);
}
else if ($1.var)
{ /* System variable */
lex->var_list.push_back(new set_var(lex->option_type, $1.var,
&$1.base_name, $3));
......@@ -6754,18 +6950,46 @@ internal_variable_name:
}
| ident '.' ident
{
LEX *lex= Lex;
if (check_reserved_words(&$1))
{
yyerror(ER(ER_SYNTAX_ERROR));
YYABORT;
}
sys_var *tmp=find_sys_var($3.str, $3.length);
if (!tmp)
YYABORT;
if (!tmp->is_struct())
net_printf(YYTHD, ER_VARIABLE_IS_NOT_STRUCT, $3.str);
$$.var= tmp;
$$.base_name= $1;
if (lex->sphead && lex->sphead->m_type == TYPE_ENUM_TRIGGER &&
(!my_strcasecmp(system_charset_info, $1.str, "NEW") ||
!my_strcasecmp(system_charset_info, $1.str, "OLD")))
{
if ($1.str[0]=='O' || $1.str[0]=='o')
{
net_printf(YYTHD, ER_TRG_CANT_CHANGE_ROW, "OLD", "");
YYABORT;
}
if (lex->trg_chistics.event == TRG_EVENT_DELETE)
{
net_printf(YYTHD, ER_TRG_NO_SUCH_ROW_IN_TRG, "NEW",
"on DELETE");
YYABORT;
}
if (lex->trg_chistics.action_time == TRG_ACTION_AFTER)
{
net_printf(YYTHD, ER_TRG_CANT_CHANGE_ROW, "NEW", "after ");
YYABORT;
}
/* This special combination will denote field of NEW row */
$$.var= &trg_new_row_fake_var;
$$.base_name= $3;
}
else
{
sys_var *tmp=find_sys_var($3.str, $3.length);
if (!tmp)
YYABORT;
if (!tmp->is_struct())
net_printf(YYTHD, ER_VARIABLE_IS_NOT_STRUCT, $3.str);
$$.var= tmp;
$$.base_name= $1;
}
}
| DEFAULT '.' ident
{
......
sql/table.h
View file @ 9ed038dd
......@@ -63,6 +63,7 @@ typedef struct st_filesort_info
class Field_timestamp;
class Field_blob;
class Table_triggers_list;
struct st_table {
handler *file;
......@@ -144,6 +145,8 @@ struct st_table {
REGINFO reginfo; /* field connections */
MEM_ROOT mem_root;
GRANT_INFO grant;
/* Table's triggers, 0 if there are no of them */
Table_triggers_list *triggers;
char *table_cache_key;
char *table_name,*real_name,*path;
......
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