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https://issues.apache.org/jira/browse/OAK-2252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14291845#comment-14291845
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Julian Reschke commented on OAK-2252:
-------------------------------------
Discussed with [~mreutegg]:
- make _deletedOnce an indexed property in RDBDocumentStore
- modify VersionGCSupport to attempt to fetch only documents where the flag is
set (requires some hackery because the type of _deletedOnce is boolean, not
integer
- test this
If this works, consider to change the type to integer if there's a good
migration story for MongoDB persistences
> VersionGCSupport for RDB persistence
> ------------------------------------
>
> Key: OAK-2252
> URL: https://issues.apache.org/jira/browse/OAK-2252
> Project: Jackrabbit Oak
> Issue Type: Sub-task
> Components: rdbmk
> Affects Versions: 1.1.1
> Reporter: Julian Reschke
> Priority: Minor
> Fix For: 1.2
>
>
> The DocumentMK's VersionGCSupport code currently special-cases the Mongo
> persistence.
> Needed are two optimized queries:
> 1) deletedOnce = true AND modifiedInSecs < lastModified
> 2) sdType in (....) AND sdMaxRevTimeInSecs < oldestRevTimeStamp
> (where in the case of 2) the matching documents can be removed right away)
> TODO:
> a) find out which of these system properties ought to be indexed properties
> b) decide on whether we can implement this as generic interface extension of
> DocumentStore, or whether we add custom code for the RDBDocumentStore
> similary to what Mongo does
> on b): I think we should aim for *removing* persistence-specific code from
> the kernel, so we probably should add extension interfaces for these.
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