Horton

Re: Make COPY format extendable: Extract COPY TO format implementations

Michael Paquier <michael@paquier.xyz>

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From: Michael Paquier <michael@paquier.xyz>
To: Andres Freund <andres@anarazel.de>
Cc: Sutou Kouhei <kou@clear-code.com>, sawada.mshk@gmail.com, zhjwpku@gmail.com, andrew@dunslane.net, nathandbossart@gmail.com, pgsql-hackers@postgresql.org
Date: 2024-02-06T06:11:05Z
Lists: pgsql-hackers 
On Mon, Feb 05, 2024 at 09:46:42PM -0800, Andres Freund wrote:
> No - what I mean is that it doesn't make sense to have copy_attribute_out(),
> as e.g. CopyToTextOneRow() already knows that it's dealing with text, so it
> can directly call the right function. That does require splitting a bit more
> between csv and text output, but I think that can be done without much
> duplication.

I am not sure to understand here.  In what is that different from
reverting 2889fd23be56 then mark CopyAttributeOutCSV and
CopyAttributeOutText as static inline?  Or you mean to merge
CopyAttributeOutText and CopyAttributeOutCSV together into a single
inlined function, reducing a bit code readability?  Both routines have
their own roadmap for encoding_embeds_ascii with quoting and escaping,
so keeping them separated looks kinda cleaner here.
--
Michael

Commits

  1. Refactor Copy{From|To}GetRoutine() to use pass-by-reference argument.

  2. Refactor COPY FROM to use format callback functions.

  3. Refactor COPY TO to use format callback functions.

  4. Another try to fix BF failure introduced in commit ddd5f4f54a.

  5. Revert "Refactor CopyReadAttributes{CSV,Text}() to use a callback in COPY FROM"

  6. Improve COPY TO performance when server and client encodings match

  7. Simplify signature of CopyAttributeOutCSV() in copyto.c

  8. Revert "Refactor CopyAttributeOut{CSV,Text}() to use a callback in COPY TO"

  9. Refactor CopyAttributeOut{CSV,Text}() to use a callback in COPY TO

  10. Refactor CopyReadAttributes{CSV,Text}() to use a callback in COPY FROM

  11. Add progress reporting of skipped tuples during COPY FROM.

  12. pgbench: Add \syncpipeline

  13. meson: Make gzip and tar optional

  14. Export the external file reader used in COPY FROM as APIs.