.NET/ASP.NET/C#/VB.NET PDF Document SDK

6 from ( 7 select dbms_rowidrowid_block_number(deptrowid) dept_blk, 8 dbms_rowidrowid_block_number(emprowid) emp_blk, 9 deptdeptno 10 from emp, dept 11 where empdeptno = deptdeptno 12 ) 13 ) 14 where flag = '*' 15 order by deptno 16 / no rows selected That was exactly our goal to get every row in the EMP table stored on the same block as the corresponding DEPT row But what would have happened if we estimated incorrectly, what if 1024 was insufficient What if some of our departments were close to 1024 and others exceeded that value Then, obviously, the data could not fit on the same block and we d have to place some of the EMP records on a block separate from the DEPT record.

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To better understand how COM components can be accessed from your F# programs, and vice versa, consider two examples: in the first one, you will wrap the widely used Flash Player into a form interactively, and in the second one, you will see how an F# object type can be consumed as if it were a COM component The Flash Player that you are accustomed to using in your everyday browsing is an ActiveX control that is loaded by Internet Explorer using an OBJECT element in the HTML page (it is also a plug-in for other browsers, but here we are interested in the COM component) By using a search engine, you can easily find that an HTML element similar to the following is used to embed the player in Internet Explorer: <OBJECT classid ="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://downloadmacromediacom/pub/shockwave/cabs/flash/swflashcab" width ="640" height="480" title ="My movie"> <param name="movie" value="MyMovie.

We can see this easily by resetting our example above (I m starting with the tables as they were before the load above, right after creating them) When I load this time, we ll load every EMP record eight times, to multiply the number of employee records per each department: ops$tkyte%ORA11GR2> insert into dept 2 ( deptno, dname, loc ) 3 select deptno+r, dname, loc 4 from scottdept, 5 (select level r from dual connect by level < 10); 36 rows created ops$tkyte%ORA11GR2> insert into emp 2 (empno, ename, job, mgr, hiredate, sal, comm, deptno) 3 select rownum, ename, job, mgr, hiredate, sal, comm, deptno+r 4 from scottemp, 5 (select level r from dual connect by level < 10), 6 (select level r2 from dual connect by level < 8); 882 rows created ops$tkyte%ORA11GR2> ops$tkyte%ORA11GR2> select min(count(*)), max(count(*)), avg(count(*)) 2 from dept 3 group by dbms_rowid.

rowid_block_number(rowid) 4 / MIN(COUNT(*)) MAX(COUNT(*)) AVG(COUNT(*)) ------------- ------------- ------------1 7 6 So far, it looks just like the prior example, but when we compare the blocks the EMP records are on to the blocks the DEPT records are on.

swf" /> <param name="quality" value="high" /> </OBJECT> From this tag, you know that the CLSID of the Flash Player ActiveX component is the one specified with the classid parameter of the OBJECT element You can now look in the Windows registry under HKEY_CLASSES_ROOT\CLSID for the subkey corresponding to the CLSID of the Flash ActiveX control If you look at the subkeys, you notice that the ProgID of the component is ShockwaveFlashShockwaveFlash, and InprocServer32 indicates that its location is C:\Windows\ system32\Macromed\Flash\Flash9bocx You can also find the GUID relative to the component type library that, when investigated, shows that the type library is contained in the same OCX file Since Flash Player is an ActiveX control with a GUI, you can rely on aximpexe rather than just tlbimpexe to generate the RCW for the COM component:.

ops$tkyte%ORA11GR2> select * 2 from ( 3 select dept_blk, emp_blk, 4 case when dept_blk <> emp_blk then '*' end flag, 5 deptno 6 from ( 7 select dbms_rowid.rowid_block_number(dept.rowid) dept_blk, 8 dbms_rowid.rowid_block_number(emp.rowid) emp_blk, 9 dept.deptno 10 from emp, dept 11 where emp.deptno = dept.deptno 12 ) 13 ) 14 where flag = '*' 15 order by deptno 16 / DEPT_BLK EMP_BLK F DEPTNO ---------- ---------- - ---------523 554 * 12 523 554 * 12 526 554 * 39 526 554 * 39 45 rows selected. we can see there are 45 out of 882 EMP rows on a block separate and distinct from the block their corresponding DEPTNO is on in the DEPT table. Given that we undersized the cluster (the SIZE parameter was too small given our real life data), we could recreate it with a cluster SIZE of 1200 and then we would discover ops$tkyte%ORA11GR2> select min(count(*)), max(count(*)), avg(count(*)) 2 from dept 3 group by dbms_rowid.rowid_block_number(rowid) 4 / MIN(COUNT(*)) MAX(COUNT(*)) AVG(COUNT(*)) ------------- ------------- ------------6 6 6 ops$tkyte%ORA11GR2> ops$tkyte%ORA11GR2> select * 2 from ( 3 select dept_blk, emp_blk, 4 case when dept_blk <> emp_blk then '*' end flag, 5 deptno 6 from ( 7 select dbms_rowid.rowid_block_number(dept.rowid) dept_blk, 8 dbms_rowid.rowid_block_number(emp.rowid) emp_blk, 9 dept.deptno 10 from emp, dept 11 where emp.deptno = dept.deptno 12 )

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2. ActiveX components are COM components implementing a well-defined set of interfaces, and they have a graphical interface. Internet Explorer is well known for loading these components, but ActiveX can be loaded by any application using the COM infrastructure.

) where flag = '*' order by deptno /