Application using JVM with IE embedded within it using its own JVM

I am developing on an application that uses JVM to
run. Within this application an IE browser is being
called. Subsequently IE browser is trying to run an
applet which is trying to open another jvm.
It appears the version of Java I am using does not
allow this. I believe this is fixed in a later
release of java but don't know which one.
I must have tried about 5 or 6 different versions of
java and each time either getting an ASDAS error or a
registry HKEY_LOCAL_MACHINE error.
Huh?
How exactly are you embedding IE into your app?
Normally IE is a seperate process and in that case nothing that your original JVM is doing will have any impact on that.
Of course the environment space that the spawned IE is being run with could very well impact it.
Of course if you are actually embedding it in your app versus spinning up another process then that would not apply. But off hand I can't ever recall seeing an article that suggested IE could be embedded in another application.
And what do you mean the applet is trying to run a jvm?
An applet runs in a JVM. The only way an applet (or just a java app) can run a jvm is by using Runtime.exec() or via JNI. Is that what you are doing?

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Hello
It sounds to me like this has something to do with bind variable peeking which was introduced in 9i. If the predicate is
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This can cause there to be a difference between the execution plan seen when issuing EXPLAIN PLAN FOR, and the actual exectuion plan used when the query is run.
Have a look at the following example:
tylerd@DEV2> CREATE TABLE dt_test_bvpeek(id number, col1 number)
2 /
Table created.
Elapsed: 00:00:00.14
tylerd@DEV2> INSERT
2 INTO
3      dt_test_bvpeek
4 SELECT
5      rownum,
6      CASE
7          WHEN MOD(rownum, 5) IN (0,1,2,3) THEN
8              1
9          ELSE
10              MOD(rownum, 5)
11          END
12      END
13 FROM
14      dual
15 CONNECT BY
16      LEVEL <= 100000
17 /
100000 rows created.
Elapsed: 00:00:00.81
tylerd@DEV2> select count(*), col1 from dt_test_bvpeek group by col1
2 /
COUNT(*)       COL1
     80000          1
     20000          4
2 rows selected.
Elapsed: 00:00:00.09
tylerd@DEV2> CREATE INDEX dt_test_bvpeek_i1 ON dt_test_bvpeek(col1)
2 /
Index created.
Elapsed: 00:00:00.40
tylerd@DEV2> EXEC dbms_stats.gather_table_stats( ownname=>USER,-
tabname=>'DT_TEST_BVPEEK',-
method_opt=>'FOR ALL INDEXED COLUMNS SIZE 254',-
cascade=>TRUE -
);PL/SQL procedure successfully completed.
Elapsed: 00:00:00.73
tylerd@DEV2> EXPLAIN PLAN FOR
2 SELECT
3      *
4 FROM
5      dt_test_bvpeek
6 WHERE
7      col1 = 1
8 /
Explained.
Elapsed: 00:00:00.01
tylerd@DEV2> SELECT * FROM TABLE(DBMS_XPLAN.display)
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 2611346395
| Id | Operation         | Name           | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT |                | 78728 |   538K|    82 (52)| 00:00:01 |
|* 1 | TABLE ACCESS FULL| DT_TEST_BVPEEK | 78728 |   538K|    82 (52)| 00:00:01 |
Predicate Information (identified by operation id):
   1 - filter("COL1"=1)
13 rows selected.
Elapsed: 00:00:00.06The execution plan for col1=1 was chosen because oracle was able to see that based on the statistics, col1=1 would result in most of the rows from the table being returned.
tylerd@DEV2> EXPLAIN PLAN FOR
2 SELECT
3      *
4 FROM
5      dt_test_bvpeek
6 WHERE
7      col1 = 4
8 /
Explained.
Elapsed: 00:00:00.00
tylerd@DEV2> SELECT * FROM TABLE(DBMS_XPLAN.display)
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 3223879139
| Id | Operation                   | Name              | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT            |                   | 21027 |   143K|    74 (21)| 00:00:01 |
|   1 | TABLE ACCESS BY INDEX ROWID| DT_TEST_BVPEEK    | 21027 |   143K|    74 (21)| 00:00:01 |
|* 2 |   INDEX RANGE SCAN          | DT_TEST_BVPEEK_I1 | 21077 |       |    29 (28)| 00:00:01 |
Predicate Information (identified by operation id):
   2 - access("COL1"=4)
14 rows selected.
Elapsed: 00:00:00.04This time, the optimiser was able to see that col1=4 would result in far fewer rows so it chose to use an index. Look what happens however when we use a bind variable with EXPLAIN PLAN FOR - especially the number of rows the optimiser estimates to be returned from the table
tylerd@DEV2> var an_col1 NUMBER
tylerd@DEV2> exec :an_col1:=1;
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.00
tylerd@DEV2>
tylerd@DEV2> EXPLAIN PLAN FOR
2 SELECT
3      *
4 FROM
5      dt_test_bvpeek
6 WHERE
7      col1 = :an_col1
8 /
Explained.
Elapsed: 00:00:00.01
tylerd@DEV2> SELECT * FROM TABLE(DBMS_XPLAN.display)
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 2611346395
| Id | Operation         | Name           | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT |                | 49882 |   340K|   100 (60)| 00:00:01 |
|* 1 | TABLE ACCESS FULL| DT_TEST_BVPEEK | 49882 |   340K|   100 (60)| 00:00:01 |
Predicate Information (identified by operation id):
   1 - filter("COL1"=TO_NUMBER(:AN_COL1))
13 rows selected.
Elapsed: 00:00:00.04
tylerd@DEV2>
tylerd@DEV2> exec :an_col1:=4;
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.01
tylerd@DEV2>
tylerd@DEV2> EXPLAIN PLAN FOR
2 SELECT
3      *
4 FROM
5      dt_test_bvpeek
6 WHERE
7      col1 = :an_col1
8 /
Explained.
Elapsed: 00:00:00.01
tylerd@DEV2> SELECT * FROM TABLE(DBMS_XPLAN.display)
2 /
PLAN_TABLE_OUTPUT
Plan hash value: 2611346395
| Id | Operation         | Name           | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT |                | 49882 |   340K|   100 (60)| 00:00:01 |
|* 1 | TABLE ACCESS FULL| DT_TEST_BVPEEK | 49882 |   340K|   100 (60)| 00:00:01 |
Predicate Information (identified by operation id):
   1 - filter("COL1"=TO_NUMBER(:AN_COL1))
13 rows selected.
Elapsed: 00:00:00.07For both values of the bind variable, the optimiser has no idea what the value will be so it has to make a calculation based on a formula which results in it estimating that the query will return roughly half of the rows in the table, and so it chooses a full scan.
Now when we actually run the query, the optimiser can take advantage of bind variable peeking and have a look at the value the first time round and base the execution plan on that:
tylerd@DEV2> exec :an_col1:=1;
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.00
tylerd@DEV2> SELECT
2      *
3 FROM
4      dt_test_bvpeek
5 WHERE
6      col1 = :an_col1
7 /
80000 rows selected.
Elapsed: 00:00:10.98
tylerd@DEV2> SELECT prev_sql_id FROM v$session WHERE audsid=SYS_CONTEXT('USERENV','SESSIONID')
2 /
PREV_SQL_ID
9t52uyyq67211
1 row selected.
Elapsed: 00:00:00.00
tylerd@DEV2> SELECT
2      operation,
3      options,
4      object_name
5 FROM
6      v$sql_plan
7 WHERE
8      sql_id = '9t52uyyq67211'
9 /
OPERATION                      OPTIONS                        OBJECT_NAME
SELECT STATEMENT
TABLE ACCESS                   FULL                           DT_TEST_BVPEEK
2 rows selected.
Elapsed: 00:00:00.03It saw that the bind variable value was 1 and that this would return most of the rows in the table so it chose a full scan.
tylerd@DEV2> exec :an_col1:=4
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.00
tylerd@DEV2> SELECT
2      *
3 FROM
4      dt_test_bvpeek
5 WHERE
6      col1 = :an_col1
7 /
20000 rows selected.
Elapsed: 00:00:03.50
tylerd@DEV2> SELECT prev_sql_id FROM v$session WHERE audsid=SYS_CONTEXT('USERENV','SESSIONID')
2 /
PREV_SQL_ID
9t52uyyq67211
1 row selected.
Elapsed: 00:00:00.00
tylerd@DEV2> SELECT
2      operation,
3      options,
4      object_name
5 FROM
6      v$sql_plan
7 WHERE
8      sql_id = '9t52uyyq67211'
9 /
OPERATION                      OPTIONS                        OBJECT_NAME
SELECT STATEMENT
TABLE ACCESS                   FULL                           DT_TEST_BVPEEK
2 rows selected.
Elapsed: 00:00:00.01Even though the value of the bind variable changed, the optimiser saw that it already had a cached version of the sql statement along with an execution plan, so it used that rather than regenerating the plan. We can check the reverse of this by causing the statement to be invalidated and re-parsed - there's lots of ways, but I'm just going to rename the table:
Elapsed: 00:00:00.03
tylerd@DEV2> alter table dt_test_bvpeek rename to dt_test_bvpeek1
2 /
Table altered.
Elapsed: 00:00:00.01
tylerd@DEV2>
20000 rows selected.
Elapsed: 00:00:04.81
tylerd@DEV2> SELECT prev_sql_id FROM v$session WHERE audsid=SYS_CONTEXT('USERENV','SESSIONID')
2 /
PREV_SQL_ID
6ztnn4fyt6y5h
1 row selected.
Elapsed: 00:00:00.00
tylerd@DEV2> SELECT
2      operation,
3      options,
4      object_name
5 FROM
6      v$sql_plan
7 WHERE
8      sql_id = '6ztnn4fyt6y5h'
9 /
OPERATION                      OPTIONS                        OBJECT_NAME
SELECT STATEMENT
TABLE ACCESS                   BY INDEX ROWID                 DT_TEST_BVPEEK1
INDEX                          RANGE SCAN                     DT_TEST_BVPEEK_I1
3 rows selected.
80000 rows selected.
Elapsed: 00:00:10.61
tylerd@DEV2> SELECT prev_sql_id FROM v$session WHERE audsid=SYS_CONTEXT('USERENV','SESSIONID')
2 /
PREV_SQL_ID
6ztnn4fyt6y5h
1 row selected.
Elapsed: 00:00:00.01
tylerd@DEV2> SELECT
2      operation,
3      options,
4      object_name
5 FROM
6      v$sql_plan
7 WHERE
8      sql_id = '6ztnn4fyt6y5h'
9 /
OPERATION                      OPTIONS                        OBJECT_NAME
SELECT STATEMENT
TABLE ACCESS                   BY INDEX ROWID                 DT_TEST_BVPEEK1
INDEX                          RANGE SCAN                     DT_TEST_BVPEEK_I1
3 rows selected.This time round, the optimiser peeked at the bind variable the first time the statement was exectued and found it to be 4, so it based the execution plan on that and chose an index range scan. When the statement was executed again, it used the plan it had already executed.
HTH
David

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