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Create an API for inserting and deleting rows in TOAST tables.

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This moves much of the non-heap-specific logic from toast_delete and
toast_insert_or_update into a helper functions accessible via a new
header, toast_helper.h.  Using the functions in this module, a table
AM can implement creation and deletion of TOAST table rows with
much less code duplication than was possible heretofore.  Some
table AMs won't want to use the TOAST logic at all, but for those
that do this will make that easier.

Patch by me, reviewed and tested by Prabhat Sabu, Thomas Munro,
Andres Freund, and Álvaro Herrera.

Discussion: http://postgr.es/m/CA+TgmoZv-=2iWM4jcw5ZhJeL18HF96+W1yJeYrnGMYdkFFnEpQ@mail.gmail.com
This commit is contained in:
Robert Haas
2019-09-06 10:38:51 -04:00
parent 286af0ce12
commit bd124996ef
5 changed files with 493 additions and 357 deletions
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src/tools/pgindent/typedefs.list
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@@ -2349,6 +2349,8 @@ TBlockState
TIDBitmap
TM_FailureData
TM_Result
ToastAttrInfo
ToastTupleContext
TOKEN_DEFAULT_DACL
TOKEN_INFORMATION_CLASS
TOKEN_PRIVILEGES