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Assigned Teams:

Catalog and Routing
Sprint:
CAR Team 2023-12-11, CAR Team 2023-12-25, CAR Team 2024-01-08, CAR Team 2024-01-22, CAR Team 2024-02-05, CAR Team 2024-02-19

Explicit collection creation:

1. The router receives an explicit create request and contacts the primary shard
2. The shard creates the collection locally and returns the UUID of the created collection
3. The router adds the CSRS as a participant and creates the collection on the cluster catalog

Implicit creation case:

1. The shard throws a new "collection needs to be created" error to the router when detecting that a write is targeting a non-existing collection (flow detailed in ~~SERVER-80372~~)
2. The router catches such error and reacts by issuing an explicit collection creation request (following the path outlined just above for the explicit creation path)
3. The shard throws SSV
4. The router re-issues the write

depends on

SERVER-86254 Implicit creation due to retryable write or txn statement must follow new path

SERVER-78799 POC distributed transactions involving local and sharding catalogs

SERVER-80372 Make implicit collection creation call into `createCollection`

SERVER-81498 Internally allow creation of new collections inside prepared transactions

SERVER-83776 Pull out from create coordinator the code to commit new collections on the sharding catalog

SERVER-85913 Adapt DDL locks to support transactions

is depended on by

SERVER-83328 Increase thread count in sharded_transactional_collection_creation.js

is related to

SERVER-83875 Simplify flow for creating collection in a transaction on sharded clusters

(1 depends on, 1 is depended on by, 1 is related to)

Participants:: [DO NOT USE] Backlog - Catalog and Routing, Pierlauro Sciarelli