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Rewrite comments in replication slot advance implementation

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The code added by 9c7d06d606 was a bit obscure; clarify that by
rewriting the comments.  Lack of clarity has already caused bugs, so
it's a worthy goal.

Co-authored-by: Arseny Sher <a.sher@postgrespro.ru>
Co-authored-by: Michaël Paquier <michael@paquier.xyz>
Co-authored-by: Álvaro Herrera <alvherre@alvh.no-ip.org>
Reviewed-by: Petr Jelínek <petr.jelinek@2ndquadrant.com>
Discussion: https://postgr.es/m/87y3fgoyrn.fsf@ars-thinkpad
This commit is contained in:
Alvaro Herrera
2018-07-19 14:15:44 -04:00
parent 309765fa1e
commit 1573995f55
2 changed files with 50 additions and 27 deletions
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5
src/backend/replication/logical/logical.c
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@@ -338,7 +338,10 @@ CreateInitDecodingContext(char *plugin,
* that, see below).
*
* output_plugin_options
* contains options passed to the output plugin.
* options passed to the output plugin.
*
* fast_forward
* bypass the generation of logical changes.
*
* read_page, prepare_write, do_write, update_progress
* callbacks that have to be filled to perform the use-case dependent,