(). 3 .
MySQL
Highload++, 26 2010 , [email protected]
: http://forge.mysql.com/tools/tool.php?id=263
( forge.mysql.com, Newest code examples , ).
0 1 2 3 4 5 Dynamic SQL6 SQL/PSM8 9
SQL/PSM
1991 . (Melton, Bauer, Eisenberg)
Ada
ANSI/ISO 1996 .
IBM DB2 MySQL. Microsoft , Oracle, PostgreSQL .
Ada
procedure Demo is type SMALLINT is range 0..256; Idx : SMALLINT;
Cnt : SMALLINT:= 10;begin-- Idx := 1;named: loop -- Put_Line("In
the loop"); Idx := Idx + 1; if Idx = Cnt then Idx := -Idx; end if;
if Idx + Cnt = 0 then exit named; end if; end loop named;exception
when Constraint_Error => Put_Line("Error");end;
SQL/PSM vs. Ada
SQL/PSM
create procedure Demo()begin declare Idx SMALLINT UNSIGNED;
declare Cnt SMALLINT UNSIGNED default 10; declare exit handler for
sqlstate "22003" select "Error";-- set Idx = 1;named: loop --
select "In the loop" as ""; set Idx = Idx + 1; if Idx = Cnt then
set Idx = -Idx; end if; if Idx + Cnt = 0 then leave named; end if;
end loop;end|
Ada
procedure Demo is type SMALLINT is range 0..256; Idx : SMALLINT;
Cnt : SMALLINT:= 10;begin-- Idx := 1;named: loop -- Put_Line("In
the loop"); Idx := Idx + 1; if Idx = Cnt then Idx := -Idx; end if;
if Idx + Cnt = 0 then exit named; end if; end loop named;exception
when Constraint_Error => Put_Line("Error");end;
Oracle PL/SQL vs. Ada
Oracle PL/SQL
create procedure Demois Idx POSITIVE; Cnt POSITIVE default
10;begin-- Idx := 1;
loop -- dbms_output.put_line("In the loop"); Idx := Idx + 1; if
Idx = Cnt then set Idx := -Idx; end if; if Idx + Cnt = 0 then exit
named; end if; end loop; exception when VALUE_ERROR then
dbms_output.put_line("Error");end;
SQL/PSM
, SQL
c
c
4 : PROCEDURE, FUNCTION, TRIGGER, EVENT
SQL/PSM (1)
sp_sql::= create | drop | call | alter *create::= CREATE
[DEFINER= user] PROCEDURE name([param_desc[,...]]) [characteristic
...] sp_bodydrop::= DROP PROCEDURE namecall::= CALL name
([parameter[,...]])* CALL name , , [] ,...
SQL/PSM: (2)
create::= CREATE [DEFINER= user] PROCEDURE
name([param_desc[,...]]) [characteristic ...] sp_bodyparam_desc::=
[ IN | OUT | INOUT ] name typesp_body::= sp_stmt sp_stmt::=
simple_sql | if | case | loop | while | repeat | return | leave |
open | fetch | close | [label:] BEGIN [sp_decl;[...]]
[sp_stmt;[...]] ENDsimple_sql::= SELECT | INSERT | SET | CALL |
...
SQL/PSM (3):
sf_sql::= create | drop | altercreate::= CREATE [DEFINER= user]
FUNCTION name([func_param_desc[,...]]) RETURNS type CALL p_proc()
-> INSERT
SQL/PSM:
SQL/PSM: (2)
sp_decl::= ... DECLARE name CONDITION FOR cond_desc |DECLARE
{CONTINUE|EXIT} HANDLER FOR hand_desc sp_stmthandler_desc::= NOT
FOUND | SQLWARNING | SQLEXCEPTION | errcode | SQLSTATE [VALUE]
"sqlstate"
CONTINUE HANDLER IGNORE
REPLACE INSERT ON DUPLICATE KEY UPDATE
SQL/PSM:
INVOKER/DEFINER
SQL
statement-based SQL/PSM
SQL/PSM: (characteristic)
characteristic::= [NOT*] DETERMINISTIC | {CONTAINS|NO SQL} SQL |
{MODIFIES|READS} SQL DATA | SQL SECURITY {DEFINER|INVOKER}
* NOT
Dynamic SQL
SQL PS: PREPARE name FROM "sql";EXECUTE name USING
@uservar[,...];DEALLOCATE PREPARE name;
, uservars -
credentials
SQL/PSM:
Unrolling :mysql> call load_daily_log(curdate());mysql>
show binlog events;
DO(f1())
black box
5.1: mixed mode
5.0:
--log-bin-trust-function-creators
SQL/PSM (3):
trg_sql::= create | dropcreate::= CREATE [DEFINER= user] TRIGGER
name {BEFORE|AFTER} {INSERT|UPDATE|DELETE} FOR EACH ROW
sp_bodydrop::= DROP TRIGGER [IF EXISTS] name
SQL/PSM (3):
ev_sql::= create | drop | altercreate::= CREATE [DEFINER= user]
EVENT name ON SCHEDULE schedule DO sp_bodydrop::= DROP EVENT
nameschedule::= AT timespec | EVERY interval [STARTS timespec]
[ENDS timespec]
: LOCK TABLES
:transactional control (Implicit and Explicit)
SELECT/SHOW
FLUSH statements
no cascading modifications on the same resource
RFE
SQL (CHECK TABLE!)
LIMIT ( 5.5)
FOR
Dynamic SQL
Dynamic SQL
...
SQL/PSM
1)
Pac-man
SQL/PSM
2)
SQL/PSM
3)
SQL/PSM
4) UPDATE
!
[email protected]
Guy Harrison MySQL Stored procedures - , MySQL -
http://oreilly.com/catalog/mysqlspp
MySQL Stored Procedures FAQ -
http://dev.mysql.com/doc/refman/5.5/en/faqs-stored-procs.htm
- -
http://www.brainbell.com/tutorials/MySQL/Using_Stored_Procedures.htm
Giuseppe Maxia - http://www.nongnu.org/mysql-sr-lib/
MySQL.com: -
http://forums.mysql.com/read.php?98,222900,222900#msg-222900
MySQL INFORMATION_SCHEMA --
http://www.xcdsql.org/MySQL/information_schema/5.1/MySQL_5_1_INFORMATION_SCHEMA.html
MySQL SQL/PSM: http://www.mydebugger.com
http://www.devart.com/dbforge/mysql/studio/code-debugger.html
(1)
Guy Harrison MySQL Stored procedures - , MySQL -
http://oreilly.com/catalog/mysqlspp
(2)
Giuseppe Maxia - http://www.nongnu.org/mysql-sr-lib/
(3)
MySQL INFORMATION_SCHEMA --
http://www.xcdsql.org/MySQL/information_schema/5.1/MySQL_5_1_INFORMATION_SCHEMA.html
(4)
MySQL SQL/PSM: http://www.mydebugger.com
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