Explain Plan in pl/sql

Question

Dear All.
DBMS_XPLAN.DISPLAY_CURSOR(
   sql_id        IN  VARCHAR2  DEFAULT  NULL,
   child_number  IN  NUMBER    DEFAULT  NULL,
   format        IN  VARCHAR2  DEFAULT  'TYPICAL');
SQL> SELECT * FROM table (
  2     DBMS_XPLAN.DISPLAY_CURSOR('b7jn4mf49n569'));
PLAN_TABLE_OUTPUT
SQL_ID  b7jn4mf49n569, child number 0
select o.name, u.name from obj$ o, type$ t, user$ u  where o.oid$ = t.tvoid and
u.user#=o.owner# and  bitand(t.properties,8388608) = 8388608 and
(sysdate-o.ctime) > 0.0007
Plan hash value: 4266358741
| Id  | Operation                     | Name    | Rows  | Bytes | Cost (%CPU)| T
|   0 | SELECT STATEMENT              |         |       |       |    94 (100)|
|   1 |  NESTED LOOPS                 |         |     1 |    72 |    94   (2)| 0
|   2 |   NESTED LOOPS                |         |     1 |    56 |    93   (2)| 0
|*  3 |    TABLE ACCESS FULL          | OBJ$    |    71 |  2414 |    37   (3)| 0
|*  4 |    TABLE ACCESS BY INDEX ROWID| TYPE$   |     1 |    22 |     1   (0)| 0
|*  5 |     INDEX UNIQUE SCAN         | I_TYPE2 |     1 |       |     0   (0)|
|   6 |   TABLE ACCESS CLUSTER        | USER$   |     1 |    16 |     1   (0)| 0
|*  7 |    INDEX UNIQUE SCAN          | I_USER# |     1 |       |     0   (0)|
PLAN_TABLE_OUTPUT
Predicate Information (identified by operation id):
   3 - filter(("O"."OID$" IS NOT NULL AND SYSDATE@!-"O"."CTIME">.0007))
   4 - filter(BITAND("T"."PROPERTIES",8388608)=8388608)
   5 - access("O"."OID$"="T"."TVOID")
   7 - access("U"."USER#"="O"."OWNER#")
29 rows selected
SQL> As you can see using DBMS_XPLAN.DISPLAY_CURSOR. I can display the explain plan of any query IN SQL*PLUS.
But I want to write a PL/SQL function that generating an explain plan for any query and displaying the explain plan in a htlm page
how can i do same thing in pl/sql? I need yours advice.
Thanks in advance!

Answer 1

Generate the plan like so:
begin
execute immediate 'explain plan for select * from dual';
end;Then you can put the dbms_xplan.display bit into a ref cursor and pass that across to the front end.
Eg:
SQL> variable rc refcursor
SQL> begin
  2  execute immediate 'explain plan for select * from dual';
  3  open :rc for select * from table(dbms_xplan.display);
  4* end;
SQL> /
PL/SQL procedure successfully completed.
SQL> print rc;
PLAN_TABLE_OUTPUT
Plan hash value: 3543395131
| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT  |      |     1 |     2 |     5   (0)| 00:00:01 |
|   1 |  TABLE ACCESS FULL| DUAL |     1 |     2 |     5   (0)| 00:00:01 |
8 rows selected.