Thread: Altering Column Date Types
Hi, I can't find anything in the docs about this. I want to alter a column in a table, which is currently an INTEGER, in order that it be FLOAT. family=# \d debtors Table "debtors" Column | Type | Modifiers -------------+---------------+----------- first_name | character(15) | second_name | character(15) | how_much | integer | city | character(10) | country | character(2) | Is this possible ? All that I can see, are changing column names, changing their defaults (if any), but not to change the data type. Thanks. D. -- Desmond Coughlan |'Io non mori, e non rimasi vivo' desmond@zeouane.org http://www.zeouane.org
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Hi Desmond ! I use 'pg_dump -c my_db > my_db_dump' and then edit the dump file's CREATE TABLE statements to change column data-tytes. When done, read or re-create the db back in with 'cat my_db_dump | psql my_db' Just make sure your data fits into the new data-type. BR, Aarni
> I use 'pg_dump -c my_db > my_db_dump' and then edit the dump file's CREATE > TABLE statements to change column data-tytes. When done, read or re-create > the db back in with 'cat my_db_dump | psql my_db' > Just make sure your data fits into the new data-type. The only thing that may be problematic with this method is if the table being dumped has some foreign key constraints on it from other tables. So to add on to the above steps, before you dump (or some time before you recreate the table), drop the other constraints, do the above then recreate the other constraints. Pain in the butt, yes, but unless you do this you won't be able to drop the table in the first place. Chris