Horton

Re: Pluggable Storage - Andres's take

Haribabu Kommi <kommi.haribabu@gmail.com>

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From: Haribabu Kommi <kommi.haribabu@gmail.com>
To: Andres Freund <andres@anarazel.de>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>, Alexander Korotkov <a.korotkov@postgrespro.ru>, Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2018-07-24T13:31:51Z
Lists: pgsql-hackers

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On Tue, Jul 17, 2018 at 11:01 PM Haribabu Kommi <kommi.haribabu@gmail.com>
wrote:

>
> On Mon, Jul 16, 2018 at 11:35 PM Andres Freund <andres@anarazel.de> wrote:
>
>> On 2018-07-04 20:11:21 +1000, Haribabu Kommi wrote:
>> > On Tue, Jul 3, 2018 at 5:06 PM Andres Freund <andres@anarazel.de>
>> wrote:
>> >
>>
> > - bitmap index scans probably need a new tableam.h callback, abstracting
>> > >   bitgetpage()
>> > >
>> >
>> > OK.
>>
>> Any chance you could try to tackle this?  I'm going to be mostly out
>> this week, so we'd probably not run across each others feet...
>>
>
> OK, I will take care of the above point.
>

I added new API in the tableam.h to get all the page visible tuples to
abstract the bitgetpage() function.

>>- Merge tableam.h and tableamapi.h and make most tableam.c functions
>> small inline functions. Having one-line tableam.c wrappers makes this
>> more expensive than necessary. We'll have a big enough trouble not
>> regressing performancewise.

I merged tableam.h and tableamapi.h into tableam.h and changed all the
functions as inline. This change may have added some additional headers,
will check them if I can remove their need.

Attached are the updated patches on top your github tree.

Currently I am working on the following.
- I observed that there is a crash when running isolation tests.
- COPY's multi_insert path should probably deal with a bunch of slots,
  rather than forming HeapTuples

Regards,
Haribabu Kommi
Fujitsu Australia

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.