Comments on: predefined collections http://laurentschneider.com/wordpress/2007/12/predefined-collections.html Oracle Certified Master Sun, 07 Sep 2008 13:41:46 +0000 http://wordpress.org/?v=2.0.5 by: Gazete http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-7993 Fri, 18 Jul 2008 18:03:34 +0000 http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-7993 Nice trick , thanks... Nice trick , thanks…

]]> by: Laurent Schneider http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5567 Fri, 07 Dec 2007 16:36:52 +0000 http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5567 Some ODCI varrays existed in 9i, like ODCINUMBERLIST. However, I found them documented only in 10gR2 Some ODCI varrays existed in 9i, like ODCINUMBERLIST. However, I found them documented only in 10gR2

]]> by: Chris http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5565 Fri, 07 Dec 2007 09:09:44 +0000 http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5565 What imho really sucks is that oracle is not capable of producing a set of reusable components for pl/sql development. E.g., there should be a goddamn standard table of varchar2(4000) that everybody uses! Well, they'd better get a better name ;-) What imho really sucks is that oracle is not capable of producing a set of reusable components for pl/sql development. E.g., there should be a goddamn standard table of varchar2(4000) that everybody uses! Well, they’d better get a better name ;-)

]]> by: Laurent Schneider http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5558 Thu, 06 Dec 2007 10:55:29 +0000 http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5558 I made a test Garry and it seems you are right about memory usage. <code> select * from table(sys.ODCIVarchar2List('AAA','BBB','CCC')) COLUMN_VALUE ------------ AAA BBB CCC select * from table(sys.dbms_debug_vc2coll('AAA','BBB','CCC')) COLUMN_VALUE ------------ AAA BBB CCC select sql_text,sharable_mem,persistent_mem,runtime_mem from v$sqlarea where sql_text like '%AAA%' and sql_text not like '%sharable%' SQL_TEXT -------- SHARABLE_MEM PERSISTENT_MEM RUNTIME_MEM ------------ -------------- ----------- select * from table(sys.ODCIVarchar2List('AAA','BBB','CCC')) 13582 13752 12864 select * from table(sys.dbms_debug_vc2coll('AAA','BBB','CCC')) 13584 4752 3864 </code> I made a test Garry and it seems you are right about memory usage. 


select * from table(sys.ODCIVarchar2List('AAA','BBB','CCC'))

COLUMN_VALUE                                                                    
------------
AAA                                                                             
BBB                                                                             
CCC                                                                             

select * from table(sys.dbms_debug_vc2coll('AAA','BBB','CCC'))

COLUMN_VALUE                                                                    
------------
AAA                                                                             
BBB                                                                             
CCC                                                                             

select sql_text,sharable_mem,persistent_mem,runtime_mem 
from v$sqlarea 
where sql_text like '%AAA%' 
and sql_text not like '%sharable%'

SQL_TEXT                                                                        
--------
SHARABLE_MEM PERSISTENT_MEM RUNTIME_MEM
------------ -------------- -----------
select * from table(sys.ODCIVarchar2List('AAA','BBB','CCC'))                    
       13582          13752       12864
                                                                                
select * from table(sys.dbms_debug_vc2coll('AAA','BBB','CCC'))                  
       13584           4752        3864
                                                                                

]]> by: Laurent Schneider http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5557 Thu, 06 Dec 2007 09:03:41 +0000 http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5557 DJ, Why should a SQL statement depend on a type, when there is a documented datatype which is not supposed to change in next release (because it is documented). Oracle cannot remove features in a next release without notice. I would say it is OK to rely on them because *they are documented* Those extensibility types also exist for date, numbers and raw. Gary, How could you say my one use more space? 32767 is a limit. Also varchar2(1000) is a meaningless constraint on varchar2, 4000 is the maximum. Could you show the difference in memory usage? But true, those extensibility types are documented only in 10gR2 and 11gR1. So in 9iR2, dbms_debug_vc2coll sounds possible DJ,
Why should a SQL statement depend on a type, when there is a documented datatype which is not supposed to change in next release (because it is documented). Oracle cannot remove features in a next release without notice. I would say it is OK to rely on them because *they are documented*

Those extensibility types also exist for date, numbers and raw.

Gary,
How could you say my one use more space? 32767 is a limit. Also varchar2(1000) is a meaningless constraint on varchar2, 4000 is the maximum. Could you show the difference in memory usage?

But true, those extensibility types are documented only in 10gR2 and 11gR1. So in 9iR2, dbms_debug_vc2coll sounds possible

]]> by: DJ http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5551 Wed, 05 Dec 2007 23:41:51 +0000 http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5551 Come on, it takes a single SQL to create your own defined types. Why rely on system types that may change in the next release? One less thing to check for upgrade. Come on, it takes a single SQL to create your own defined types. Why rely on system types that may change in the next release? One less thing to check for upgrade.

]]> by: Gary http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5549 Wed, 05 Dec 2007 22:25:43 +0000 http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5549 I've used the following, which is also available in 9iR2: select * from table(sys.dbms_debug_vc2coll('A','B','C')); This one is a TABLE OF VARCHAR2(1000), where ODCIVarchar2List is a VARRAY(32767) OF VARCHAR2(4000), so yours does give more space. I’ve used the following, which is also available in 9iR2:
select * from table(sys.dbms_debug_vc2coll(’A',’B',’C'));
This one is a TABLE OF VARCHAR2(1000), where ODCIVarchar2List is a VARRAY(32767) OF VARCHAR2(4000), so yours does give more space.

]]> by: Paweł Barut http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5547 Wed, 05 Dec 2007 17:06:06 +0000 http://laurentschneider.com/wordpress/2007/12/predefined-collections.html#comment-5547 Nice trick. Nice trick.

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