Postgresql change column type from int to UUID

Question

I\'d like to change the column type from an int to a uuid. I am using the following statement

ALTER TABLE tableA ALTER COLUMN colA          


        

Answer 1

In PostgreSQL 9.3 you can do this:

ALTER TABLE "tableA" ALTER COLUMN "ColA" SET DATA TYPE UUID USING "ColA"::UUID;

And cast the type of data to UUID and this will avoid the error message.