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altering the datatype of a column.

P: n/a
Dear my friends...

I want to change the datatype of a completed table
(has had already content).
But I don't know how.
Here is my try:
"
kv=# alter table customer alter column address set
type char(150);
ERROR: syntax error at or near "type" at character 47
kv=# alter table customer alter column address set
datatype char(150);
ERROR: syntax error at or near "datatype" at
character 47
kv=#
"

Please tell me how.

If I alter the datatype of the field, am I going to
loose the data inside the column?

Thank you very much in advance.


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Nov 23 '05 #1
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P: n/a
On Wed, 2004-08-04 at 18:47, Prabu Subroto wrote:
Dear my friends...

I want to change the datatype of a completed table
(has had already content).
But I don't know how. .... Please tell me how.


It is not possible in 7.4

Create a new column of the correct type; update the table to set the new
column to have the data from the old one; delete the old column; rename
the new one.

--
Oliver Elphick ol**@lfix.co.uk
Isle of Wight http://www.lfix.co.uk/oliver
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knowing that tribulation worketh patience; And
patience, experience; and experience, hope."
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Nov 23 '05 #2

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