Re: Altering multiple column types

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(at)gmail(dot)com> wrote:

> On Fri, Aug 2, 2019 at 9:39 AM Bharanee Rathna <deepfryed(at)gmail(dot)com>
> 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
>