Contrib.social

Add a KeyValueStore\IterableKeysInterface (allowing to retrieve keys with a given prefix)

Open on Drupal.org →
Created on 23 December 2013, over 11 years ago
Updated 31 March 2025, 6 days ago

Raised in #2161591-2: Change default active config from file storage to DB storage → we could add these. I have researched many structured document stores and as far as I can see either natively (Sphinx, Sphinx RT, Couchbase) or some simple trickery (for Redis see this and ) or by iterating the namespace -- I doubt there will be more than a couple thousand config objects (examples are dba with dba_nextkey or LevelDB iterators). Most people will use SQL, MongoDB or perhaps Redis for K-V so why not. Alternatively we can create an KeyValueWithPrefixSearchInterface if we are really afraid.

Going over the list provided by https://github.com/minad/moneta

  • All the DBM descendants are covered by dba_nextkey
  • Cassandra likely can't but it can use the Redis trie idea. Also you can retrieve all keys in a column family by get_range_slices with a start_key of empty string, and no end_key.
  • Daybreak seems to be a Ruby only embedded DB.
  • GDBM is dba covered http://www.php.net/manual/en/dba.installation.php
  • HBase
  • LevelDB has iterators to go over every key. Also, my understanding is it can be ordered and there's a range query.
  • LMDB keys are iterable -- even better, they are ordered and you can set a range.
  • Redis: the author suggests building a trie, there's an optimization. All this has an implementation
  • Riak is built on top of LevelDB, see more in this post about how simple it is to list keys.
  • SDBM is DBM (I verified in the Ruby docs that the keyspace is enumerable)
  • Kyoto/TokyoCabinet is covered by dba in PHP 5.4.0 (lucky we go 5.4, eh?) but also I think it's QDBM compatible.
  • TDB is dba covered.

In short: all K-V stores at least support iterating all keys, most have better ways.

📌 Task
Status

Postponed: needs info

Version

11.0 🔥

Component

base system

Created by

🇨🇦Canada chx

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  • Comment 6 days ago →
    🇺🇸United States smustgrave

    Thank you for creating this issue to improve Drupal.

    We are working to decide if this task is still relevant to a currently supported version of Drupal. There hasn't been any discussion here for over 8 years which suggests that this has either been implemented or is no longer relevant. Your thoughts on this will allow a decision to be made.

    Since we need more information to move forward with this issue, the status is now Postponed (maintainer needs more info). If we don't receive additional information to help with the issue, it may be closed after three months.

    Thanks!

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