Hi Zack,
Phoenix doesn't support an ALTER TABLE statement that allows this, but you
can modify the SYSTEM.CATALOG directly with an UPSERT VALUES call if you're
careful. Make sure to:
- Create a snapshot of the SYSTEM.CATALOG just in case something goes wrong
- Ensure that other modifications aren't occurring to the SYSTEM.CATALOG
table at the same time.
- Bounce your cluster afterwards as Phoenix caches metadata on the region
server hosting the SYSTEM.CATALOG table.
- Restart your client as Phoenix caches metadata on the client as well.
The statement you'd want to run would be something like this (followed by a
commit):
UPSERT INTO SYSTEM.CATALOG (
TENANT_ID,
TABLE_SCHEM,
TABLE_NAME,
COLUMN_NAME,
COLUMN_FAMILY,
COLUMN_SIZE
VALUES (
null,
"YOUR_SCHEMA_NAME",
"YOUR_TABLE_NAME",
"YOUR_COLUMN_NAME",
"YOUR_COLUMN_FAMILY_NAME", // or "0" if you didn't specify one
200); // Or whatever you want to increase the max size to be
Thanks,
James
On Thu, Oct 6, 2016 at 8:14 AM, Riesland, Zack <zack.riesl...@sensus.com>
wrote:
> I have a column on a table that is set to varchar(40).
>
>
>
> I need to increase that 40, but I don’t want to lose any of the data in
> the table.
>
>
>
> The only suggestions I’ve seen online involve dropping the column and
> re-creating it, or creating a new table. But I would like to preserve the
> name of this table.
>
>
>
> If I make a copy table, can I rename it after I drop the original?
>
>
>
> What is the best way to accomplish this?
>
>
>
> Thanks!
>
>
>
> *Zack Riesland | Data Analytics*
>
> 639 Davis Drive | Morrisville, NC 27560 USA
>
> *zack.riesl...@sensus.com <zack.riesl...@sensus.com> | **www.sensus.com
> <http://www.sensus.com/>*
>
> Skype: zack_riesland
>
>
> [image: Sensus] <http://www.sensus.com/>
>
>
>
