Re: Altering multiple column types

[Bharanee Rathna <deepfryed@xxxxxxxxx>]

Hi Luca,

testing this using docker images. I can replicate it with 10.9-alpine

bash-5.0# psql -h127.0.0.1 -Upostgres test
psql (10.9)
Type "help" for help.

test=# \d users
                                    Table "public.users"
 Column |          Type          | Collation | Nullable |              Default              
--------+------------------------+-----------+----------+-----------------------------------
 id     | integer                |           | not null | nextval('users_id_seq'::regclass)
 name   | character varying(255) |           |          |
 age    | integer                |           |          |
 email  | character varying(255) |           |          |
Indexes:
    "users_pkey" PRIMARY KEY, btree (id)
    "users_email_idx" btree (email)
    "users_name_idx" btree (name)

test=# alter table users alter column name type text, alter column email type text;
ERROR:  relation "users_name_idx" already exists

test=# select version();
                                        version                                        
---------------------------------------------------------------------------------------
 PostgreSQL 10.9 on x86_64-pc-linux-musl, compiled by gcc (Alpine 8.3.0) 8.3.0, 64-bit
(1 row)

and 11.4

psql (11.4)
Type "help" for help.

test=# \d users
                                    Table "public.users"
 Column |          Type          | Collation | Nullable |              Default              
--------+------------------------+-----------+----------+-----------------------------------
 id     | integer                |           | not null | nextval('users_id_seq'::regclass)
 name   | character varying(255) |           |          |
 age    | integer                |           |          |
 email  | character varying(255) |           |          |
Indexes:
    "users_pkey" PRIMARY KEY, btree (id)
    "users_email_idx" btree (email)
    "users_name_idx" btree (name)

test=# alter table users alter column name type text, alter column email type text;
ERROR:  relation "users_name_idx" already exists

test=# select version();
                                        version                                        
---------------------------------------------------------------------------------------
 PostgreSQL 11.4 on x86_64-pc-linux-musl, compiled by gcc (Alpine 8.3.0) 8.3.0, 64-bit
(1 row)

Not sure what's going on at my end ...

On Fri, 2 Aug 2019 at 17:44, Luca Ferrari <fluca1978@xxxxxxxxx> wrote:

On Fri, Aug 2, 2019 at 9:39 AM Bharanee Rathna <deepfryed@xxxxxxxxx> wrote:
>
> Hi Luca,
>
> I've tried it with a different client and Postgres 10.9, no luck
>
> psql (10.3, server 10.9)

I've fired up a 12beta2 and it works, either with psql 12 or psql 11.4 on linux.
What if you run the statements within another client (pgadmin, a java
client or something else)?

% psql -U postgres testdb
psql (12beta2)
Type "help" for help.

testdb=# create table users(id serial primary key, name varchar(255),
age int, email varchar(255));
CREATE TABLE
testdb=# create index users_email_idx on users(email);
CREATE INDEX
testdb=# alter table users alter column name type text, alter column
email type text;
ALTER TABLE
testdb=# SELECT version();
                                                 version
----------------------------------------------------------------------------------------------------------
 PostgreSQL 12beta2 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu
8.3.0-6ubuntu1~18.10.1) 8.3.0, 64-bit
(1 row)




% ~/git/misc/PostgreSQL/pgenv/pgsql-11.4/bin/psql -U postgres testdb

psql (11.4, server 12beta2)
WARNING: psql major version 11, server major version 12.
         Some psql features might not work.
Type "help" for help.

testdb=# drop table users;
DROP TABLE
testdb=# create table users(id serial primary key, name varchar(255),
age int, email varchar(255));
CREATE TABLE
testdb=# create index users_email_idx on users(email);
CREATE INDEX
testdb=# alter table users alter column name type text, alter column
email type text;
ALTER TABLE