hasura/graphql-engine
1
0
Fork 0
mirror of https://github.com/hasura/graphql-engine.git synced 2024-12-14 17:02:49 +03:00
Code Issues Projects Releases Wiki Activity

server: document the remote joins architecture

Browse Source 
GitOrigin-RevId: f142908fa3dd3b0cb8887521c639be4a017e606a
This commit is contained in:
Karthikeyan Chinnakonda 2021-03-03 17:16:08 +05:30 committed by hasura-bot
parent 42f5d66015
commit 15ed0cf536
1 changed files with 27 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
server/src-lib/Hasura/GraphQL/Execute/RemoteJoin.hs
View File

@ -24,6 +24,33 @@ import Hasura.RQL.IR.Returning
import Hasura.RQL.IR.Select
import Hasura.RQL.Types
{- Note: [Remote Joins Architecture]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Unparsed Incoming GraphQL +------------------------------+
--------------------------> | Parsing of the GraphQL query |-----+
+------------------------------+ |
| DB Query and remote joins (if any)
|
V
+----------------------------------+ SQL query response +----------------------------+
| Traverse the DB response to | <------------------- | Execution of the DB query |
| get the values of the arguments | +----------------------------+
| of the remote field |
+----------------------------------+
|
| Remote field arguments
V
+--------------------------+ Remote schema response +----------------------------------------+
| Query the remote schema | ------------------------> | Replace the remote join fields in |
| with the remote field | | the SQL query response (JSON) with |
| arguments to the remote | | the response obtained from the remote |
| field configured in the | | schema at appropriate places. |
| remote join. | +----------------------------------------+
+--------------------------+
-}
-- remote joins info