HDBC
Haskell Database Connectivity (by hdbc)
pool-conduit
Persistence interface for Haskell allowing multiple storage methods. (by yesodweb)
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| HDBC | pool-conduit | |
|---|---|---|
| 0 | 8 | |
| 116 | 426 | |
| 1.7% | 0.5% | |
| 4.9 | 8.4 | |
| 3 months ago | 16 days ago | |
| Haskell | Haskell | |
| BSD 3-clause "New" or "Revised" License | MIT License |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
HDBC
Posts with mentions or reviews of HDBC.
We have used some of these posts to build our list of alternatives
and similar projects.
We haven't tracked posts mentioning HDBC yet.
Tracking mentions began in Dec 2020.
pool-conduit
Posts with mentions or reviews of pool-conduit.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2022-05-06.
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Was simplified subsumption worth it for industry Haskell programmers?
I don't think there's any malicious intent. It seems pretty clear that the motivation here is to simplify the type checker considerably, which is a really good reason to do something. Heck, I've got an open issue for deleting a feature in persistent which (according to the lack of comments on the issue) only ever used by persistent's own test suite.
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[ANNOUNCE] GHC 9.2.2 is now available!
PR submitted: https://github.com/yesodweb/persistent/pull/1366 :)
- Simple Servant + Persistent + Katip template for starting a new project
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Async Control Flow
Ha, I spotted a possible resource leak here. If stmtFinalize fail, then the connection won't be closed.
Hmm, you are right, the bracket I pointed to is unrelated. I guess the fix is in catchAny, which doesn't catch ThreadKilled. So not it's not rolling the transaction back in case of asynchronous exceptions. My point is that it probably should not rollback even on synchronous exception. BTW the issue is well know, see for example here
https://github.com/yesodweb/persistent/blob/f69716dcfeca01896ec42dec874393fbe60d3939/persistent/Database/Persist/Sql/Run.hs#L212
I don't think connection is returned to the pool here. The thread is interrupted when query is sent to server, but before the results are consumed. At that point cleanup action catches `ThreadKilled` exceptions and issues `ROLLBACK`, which fails with `libpg` exception because the previous operations was not completed. And now cleanup action rethrows the `libpg` exception instead of the `ThreadKilled` one - that's the behavior of `bracket` from `base`. [The fix](https://github.com/yesodweb/persistent/pull/1207/files#diff-f9d7f232cd00cb88188b7fcc68110e3f4cb378fcad9df652360de44d13cd86e3R199) was to use `bracket` from `unliftio`, which [rethrows the correct exception](https://hackage.haskell.org/package/unliftio-0.2.14/docs/src/UnliftIO.Exception.html#bracket).
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Using a different version of a package than what exists in resolver.
text Cloning b1e32adfe1da49cd9df997a13bd0c5b391486f5c from https://github.com/yesodweb/persistent.git No cabal file found for Repo from https://github.com/yesodweb/persistent.git, commit b1e32adfe1da49cd9df997a13bd0c5b391486f5c
What are some alternatives?
When comparing HDBC and pool-conduit you can also consider the following projects:
opaleye
HongoDB - A Simple Key Value Store
lmdb - Lightning MDB bindings for Haskell
bloodhound - Haskell Elasticsearch client and query DSL
hocilib - A lightweight Haskell binding to the OCILIB C API
erd - Translates a plain text description of a relational database schema to a graphical entity-relationship diagram.
mongoDB - MongoDB driver for Haskell
persistent-relational-record - Persistent adapter for Haskell Relational Record
persistent-database-url
persistent-protobuf - a Template-Haskell routine to ease integration between Persistent and protobufs
persistent-template-classy - Generate classy lens field accessors for persistent models
persistent-generic - Generic facilities for working with Persistent classes