Using a dynamic table as a queue

To implement a queue using dynamic tables, use ordered dynamic tables. Such tables are a sequence of ordered rows, with no key columns.

CLI

Python

Create a table:

yt create table //path/to/table --attributes \
'{dynamic=%true;schema=[{name=first_name;type=string};{name=last_name;type=string}]}'

Mount a table:
```
yt mount-table //path/to/table
```

Write data:

echo '{first_name=Ivan;last_name=Ivanov}' | yt insert-rows //path/to/table --format yson

Read data:

yt select-rows '* from [//path/to/table]' --format json
{"first_name":"Ivan","last_name":"Ivanov"}

Create a table:

import yt.wrapper as yt

schema = [
    {
        'name': 'first_name',
        'type': 'string'
    },
    {
        'name': 'last_name',
        'type': 'string'
    }
]

 yt.create('table', '//path/to/table', attributes = {'dynamic': True, 'schema': schema})

Mount a table:
```
yt.mount_table('//path/to/table')
```

Write data:

data = [{
        'first_name': 'Ivan',
        'last_name': 'Ivanov'
}]

client.insert_rows('//path/to/table', data)

Read data:

for d in client.select_rows('* FROM [//path/to/table]'):
    print(d)
{'$tablet_index': 0L, 'first_name': 'Ivan', '$row_index': 0L, 'last_name': 'Ivanov'}

For more information about cleaning up and splitting ordered dynamic tables into tablets, see Ordered dynamic tables.