Ability to insert duplicate keys in unique index #9965
Description
If not using the most efficient representation we can insert duplicate keys in unique index:
Tarantool 2.11.2-0-g1bac2d2
tarantool> s = box.schema.space.create('test')
---
...
tarantool> s:create_index('pk')
---
- unique: true
parts:
- type: unsigned
is_nullable: false
fieldno: 1
hint: true
id: 0
type: TREE
space_id: 512
name: pk
...
tarantool> msgpack = require('msgpack')
---
...
tarantool> s:insert{1}
---
- [1]
...
tarantool> o = msgpack.object_from_raw('\x91\xcf\x00\x00\x00\x00\x00\x00\x00\x01')
---
...
tarantool> o:decode()
---
- [1]
...
tarantool> s:insert(o)
---
- [1]
...
tarantool> s:select()
---
- - [1]
- [1]
...