Comments on: Change the size of a column and then reorganize the rows in SQL tables

By: hispi

hispi — Mon, 02 Aug 2010 09:39:46 +0000

Finally, i could not make work this. I had to do it throught csharp inside of my application.

Thank you anyway.

By: hispi

hispi — Thu, 29 Jul 2010 07:38:01 +0000

Its Oracle 11g but we also work with sqlserver, but If you can help me with the Oracle one I may can fix the sqlserver.

I have googled for ALLOCATE(),this is what,from my eyes, would fix what I need but I havent find usefull information. My sqldeveloper regonize that instruction but I dont know how use it. If you could teach me plz.

Thanks for answering

By: rickmartinez

rickmartinez — Wed, 28 Jul 2010 20:26:46 +0000

is this sql server?

By: tomliotta

tomliotta — Wed, 28 Jul 2010 01:26:00 +0000

What database (DBMS) are you using?

For the actual change, I might run something like:

ALTER TABLE PHOTO_DETAIL ALTER COLUMN PHOTO_LINE
   SET DATA TYPE VARCHAR ( 1024 BYTE)

Depending on the number of rows, I might add an ALLOCATE() clause that fits the distribution of data.

I might also run:

UPDATE PHOTO_DETAIL SET PHOTO_LINE = trim(PHOTO_LINE)

…just to get variable length values into all existing rows.

For your INSERT, it’s unclear whether DE.NUM_LINEA is CHAR or VARCHAR or what its values might look like. I thought maybe you could do TRIM(DE.NUM_LINEA) rather than the direct value, but it could depend on the data.

Tom