Horton

Re: Pluggable Storage - Andres's take

Dmitry Dolgov <9erthalion6@gmail.com>

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From: Dmitry Dolgov <9erthalion6@gmail.com>
To: Andres Freund <andres@anarazel.de>
Cc: Haribabu Kommi <kommi.haribabu@gmail.com>, apraveen@pivotal.io, PostgreSQL-development <pgsql-hackers@postgresql.org>, aagrawal@pivotal.io, Alvaro Herrera <alvherre@2ndquadrant.com>, Alexander Korotkov <a.korotkov@postgrespro.ru>
Date: 2018-12-11T09:37:28Z
Lists: pgsql-hackers 
> On Tue, Dec 11, 2018 at 3:13 AM Andres Freund <andres@anarazel.de> wrote:
>
> Hi,
>
> On 2018-11-26 17:55:57 -0800, Andres Freund wrote:
> > FWIW, now that oids are removed, and the tuple table slot abstraction
> > got in, I'm working on rebasing the pluggable storage patchset ontop of
> > that.
>
> I've pushed a version to that to the git tree, including a rebased
> version of zheap:
> https://github.com/anarazel/postgres-pluggable-storage
> https://github.com/anarazel/postgres-pluggable-zheap

Great, thanks!

As a side note, I assume the last reference should be this, right?

https://github.com/anarazel/postgres-pluggable-storage/tree/pluggable-zheap

> Further tasks I'm not yet planning to tackle, that I'd welcome help on:
> - pg_dump support
> - pg_upgrade testing
> - I think we should consider removing HeapTuple->t_tableOid, it should
>   imo live entirely in the slot

I would love to try help with pg_dump support.

Commits

  1. Add default_table_access_method to postgresql.conf.sample.

  2. tableam: Avoid relying on relation size to determine validity of tids.

  3. tableam: Don't assume that every AM uses md.c style storage.

  4. Allow pg_class xid & multixid horizons to not be set.

  5. Fix slot type issue for fuzzy distance index scan over out-of-core table AM.

  6. tableam: comment and formatting fixes.

  7. table: docs: fix typos and grammar.

  8. tableam: basic documentation.

  9. Only allow heap in a number of contrib modules.

  10. tableam: Add table_finish_bulk_insert().

  11. tableam: sample scan.

  12. tableam: bitmap table scan.

  13. tableam: Move heap specific logic from estimate_rel_size below tableam.

  14. tableam: VACUUM and ANALYZE support.

  15. tableam: relation creation, VACUUM FULL/CLUSTER, SET TABLESPACE.

  16. tableam: Support for an index build's initial table scan(s).

  17. tableam: Add table_get_latest_tid, to wrap heap_get_latest_tid.

  18. tableam: Add helper for indexes to check if a corresponding table tuples exist.

  19. tableam: Add and use table_fetch_row_version().

  20. tableam: Use in CREATE TABLE AS and CREATE MATERIALIZED VIEW.

  21. Ensure sufficient alignment for ParallelTableScanDescData in BTShared.

  22. Don't reuse slots between root and partition in ON CONFLICT ... UPDATE.

  23. Use a virtual rather than a heap slot in two places where that suffices.

  24. Store tuples for EvalPlanQual in slots, rather than as HeapTuples.

  25. Use slots in trigger infrastructure, except for the actual invocation.

  26. Store table oid and tuple's tid in tuple slots directly.

  27. Allow to use HeapTupleData embedded in [Buffer]HeapTupleTableSlot.

  28. Add ExecStorePinnedBufferHeapTuple.

  29. Add ArchiveOpts to pass options to ArchiveEntry

  30. Rename RelationData.rd_amroutine to rd_indam.

  31. Rephrase references to "time qualification".

  32. Move remaining code from tqual.[ch] to heapam.h / heapam_visibility.c.

  33. Move generic snapshot related code from tqual.h to snapmgr.h.

  34. Remove superfluous tqual.h includes.

  35. Don't duplicate parallel seqscan shmem sizing logic in nbtree.

  36. Move vacuumlazy.c into access/heap.

  37. Support parallel bitmap heap scans.