RE: DBA_TAB_PARTITIONS

               Thanks! I will look into these.

Liz

Elizabeth Reen
CPB Database Group Manager
718.248.9930 (Office)
Service Now Group: CPB-ORACLE-DB-SUPPORT

From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Norman Dunbar Sent: Tuesday, January 16, 2018 3:32 PM To: Reen, Elizabeth ; oracle-l_at_freelists.org Subject: Re: DBA_TAB_PARTITIONS

Evening Elizabeth,

Toad etc don't need to convert as they are selecting the LONG data in it's entirety. Similar to how they can show a NUMBER without converting using TO_CHAR() - these utilities fetch the data into local variables in whatever language they are written in - C, Delphi etc - so an Oracle LOND (or VARCHAR2 etc) will be converted into a C char[] or similar 'on the fly'.

LONGs are a monumental PITB when you want to do anything with them.

This blog post might help show you how to convert to a CLOB, which you can then use DBMS_LOB.SUBSTR etc to slice up. https://ellebaek.wordpress.com/2010/12/06/converting-a-long-column-to-a-clob-on-the-fly/<https://urldefense.proofpoint.com/v2/url?u=https-3A__ellebaek.wordpress.com_2010_12_06_converting-2Da-2Dlong-2Dcolumn-2Dto-2Da-2Dclob-2Don-2Dthe-2Dfly_&d=DwMFaQ&c=j-EkbjBYwkAB4f8ZbVn1Fw&r=yWMFosURAngbt8VLeJtKLVJGefQxustAZ9UxecV7xpc&m=8V99--zv5ic024WB8vHBXoDgoQej3MoQ7OAnVjYN7lk&s=eIqJ4GbOk7Zlr_bEExyUnTRnmnRlGJQMUWLRVhnV7KI&e=>

There are some less frantic solutions in PL/SQL at https://www.toadworld.com/platforms/oracle/b/weblog/archive/2014/05/20/long-to-clob-conversion-constraint-conditions-and-database-d-i-y<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.toadworld.com_platforms_oracle_b_weblog_archive_2014_05_20_long-2Dto-2Dclob-2Dconversion-2Dconstraint-2Dconditions-2Dand-2Ddatabase-2Dd-2Di-2Dy&d=DwMFaQ&c=j-EkbjBYwkAB4f8ZbVn1Fw&r=yWMFosURAngbt8VLeJtKLVJGefQxustAZ9UxecV7xpc&m=8V99--zv5ic024WB8vHBXoDgoQej3MoQ7OAnVjYN7lk&s=4T1qU1zZ8DdnFjNeRSuEI0Rgp63GtadU3BntKiBAXrA&e=> - near the end - it looks like PL/SQL does implicit conversions. Test and see how you get on.

Finally, I had a similar problem myself looking for broken check constraints which suffered from a similar LONG problem. As the amount of data was small, I created a temporary table as described at http://qdosmsq.dunbar-it.co.uk/blog/2016/08/dropping-temporary-tables-with-bonus-broken-check-constraints/<https://urldefense.proofpoint.com/v2/url?u=http-3A__qdosmsq.dunbar-2Dit.co.uk_blog_2016_08_dropping-2Dtemporary-2Dtables-2Dwith-2Dbonus-2Dbroken-2Dcheck-2Dconstraints_&d=DwMFaQ&c=j-EkbjBYwkAB4f8ZbVn1Fw&r=yWMFosURAngbt8VLeJtKLVJGefQxustAZ9UxecV7xpc&m=8V99--zv5ic024WB8vHBXoDgoQej3MoQ7OAnVjYN7lk&s=jpKnrnXEPbe2c9pDNqlR8Wyaxfngh5N2-jN9jJl_N_w&e=>

HTH Cheers,
Norm.
On 16 January 2018 19:46:07 GMT+00:00, "Reen, Elizabeth " <dmarc-noreply_at_freelists.org<mailto:dmarc-noreply_at_freelists.org>> wrote:

               We are trying to create a sql which will create a script of partitions to compress which are older than a certain date. That information is kept in High_value. When displayed high_value looks like this

TO_DATE(' 2017-01-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN')                So the first thing we did was to query where high_value like ‘TO_DATE%’. We got an invalid character error. Long story short, we discovered that high_value’s data type is long. There must be a way to translate this into text. SQLplus, Sqldeveloper, and TOAD all do that. The question is how do they do it? Does anyone know how it is done?

Thanks,

Liz

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http://www.freelists.org/webpage/oracle-l Received on Tue Jan 16 2018 - 22:49:32 CET