Antalya 26:6 Fix alter operations for iceberg

[subkanthi]

continuation of work from #1841

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

...

Documentation entry for user-facing changes

...

CI/CD Options

Exclude tests:

• Fast test
• Integration Tests
• Stateless tests
• Stateful tests
• Performance tests
• Aarch64 tests
• All with ASAN
• All with TSAN
• All with MSAN
• All with UBSAN
• All with Coverage
• All Regression
• Disable CI Cache

Regression jobs to run:

• Fast suites (mostly <1h)
• Aggregate Functions (2h)
• Alter (1.5h)
• Benchmark (30m)
• ClickHouse Keeper (1h)
• Iceberg (2h)
• LDAP (1h)
• OAuth (5m)
• Parquet (1.5h)
• RBAC (1.5h)
• SSL Server (1h)
• S3 (2h)
• S3 Export (2h)
• Swarms (30m)
• Tiered Storage (2h)

[github-actions]

Workflow [PR], commit [a4e6f39]

[subkanthi]

ADD COLUMN

Ubuntu-2404-noble-amd64-base :) ALTER table ice.`default.dest5` add column new_column Nullable(UInt64);

ALTER TABLE ice.`default.dest5`
    (ADD COLUMN `new_column` Nullable(UInt64))

Query id: 825e8155-ec00-45f0-a54e-63291f46ef10

Ok.

0 rows in set. Elapsed: 0.314 sec. 

Ubuntu-2404-noble-amd64-base :) show create table ice.`default.dest5`;

SHOW CREATE TABLE ice.`default.dest5`

Query id: 0c79176a-55dd-4aa4-a4c4-2125f5cde5fe

   ┌─statement────────────────────────────────────────────────┐
1. │ CREATE TABLE ice.`default.dest5`                        ↴│
   │↳(                                                       ↴│
   │↳    `event_month` Int32,                                ↴│
   │↳    `id` Int64,                                         ↴│
   │↳    `event_time` DateTime64(6),                         ↴│
   │↳    `user_id` Int32,                                    ↴│
   │↳    `category_name` String,                             ↴│
   │↳    `value` Float64,                                    ↴│
   │↳    `payload` String,                                   ↴│
   │↳    `col2` Nullable(Int64),                             ↴│
   │↳    `new_column` Nullable(Int64)                        ↴│
   │↳)                                                       ↴│
   │↳ENGINE = Iceberg('http://localhost:9000/bucket1/dest6/') │
   └──────────────────────────────────────────────────────────┘

DROP COLUMN

 alter table ice.`default.dest5` drop column col2;

ALTER TABLE ice.`default.dest5`
    (DROP COLUMN col2)

Query id: a7905249-670b-4ac2-a626-f95535c02730

Connecting to database ice at localhost:9007 as user default.
Connected to ClickHouse server version 26.6.2.

Ok.

0 rows in set. Elapsed: 0.122 sec. 

Ubuntu-2404-noble-amd64-base :) show create table ice.`default.dest5`;

SHOW CREATE TABLE ice.`default.dest5`

Query id: 9d3b156a-ca6d-4997-917a-8bf36d4d7058

   ┌─statement────────────────────────────────────────────────┐
1. │ CREATE TABLE ice.`default.dest5`                        ↴│
   │↳(                                                       ↴│
   │↳    `event_month` Int32,                                ↴│
   │↳    `id` Int64,                                         ↴│
   │↳    `event_time` DateTime64(6),                         ↴│
   │↳    `user_id` Int32,                                    ↴│
   │↳    `category_name` String,                             ↴│
   │↳    `value` Float64,                                    ↴│
   │↳    `payload` String,                                   ↴│
   │↳    `new_column` Nullable(Int64)                        ↴│
   │↳)                                                       ↴│
   │↳ENGINE = Iceberg('http://localhost:9000/bucket1/dest6/') │
   └──────────────────────────────────────────────────────────┘

1 row in set. Elapsed: 0.016 sec. 

RENAME COLUMN

 alter table ice.`default.dest5` rename column new_column to new_column_2;

ALTER TABLE ice.`default.dest5`
    (RENAME COLUMN new_column TO new_column_2)

Query id: e464f77e-0e3d-4ffc-883e-70db1260327f

Ok.

0 rows in set. Elapsed: 0.169 sec. 

Ubuntu-2404-noble-amd64-base :) show create table ice.`default.dest5`;

SHOW CREATE TABLE ice.`default.dest5`

Query id: 0b4b4e06-7d58-4583-821a-95e27f856ba9

   ┌─statement────────────────────────────────────────────────┐
1. │ CREATE TABLE ice.`default.dest5`                        ↴│
   │↳(                                                       ↴│
   │↳    `event_month` Int32,                                ↴│
   │↳    `id` Int64,                                         ↴│
   │↳    `event_time` DateTime64(6),                         ↴│
   │↳    `user_id` Int32,                                    ↴│
   │↳    `category_name` String,                             ↴│
   │↳    `value` Float64,                                    ↴│
   │↳    `payload` String,                                   ↴│
   │↳    `new_column_2` Nullable(Int64)                      ↴│
   │↳)                                                       ↴│
   │↳ENGINE = Iceberg('http://localhost:9000/bucket1/dest6/') │
   └──────────────────────────────────────────────────────────┘

1 row in set. Elapsed: 0.017 sec. 

[subkanthi]

Added support for bool

[subkanthi]

Added support for iceberg decimal types.