database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2026-01-29 12:02:15 +03:00
Code Activity

Allow table AM to store complex data structures in rd_amcache

Browse Source 
The new table AM method free_rd_amcache is responsible for freeing all the
memory related to rd_amcache and setting free_rd_amcache to NULL.  If the new
method is not specified, we still assume rd_amcache to be a single chunk of
memory, which could be just pfree'd.

Discussion: https://postgr.es/m/CAPpHfdurb9ycV8udYqM%3Do0sPS66PJ4RCBM1g-bBpvzUfogY0EA%40mail.gmail.com
Reviewed-by: Matthias van de Meent, Mark Dilger, Pavel Borisov
Reviewed-by: Nikita Malakhov, Japin Li
This commit is contained in:
Alexander Korotkov
2024-03-21 23:00:34 +02:00
parent 57184c3b5d
commit 02eb07ea89
4 changed files with 44 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/include/utils/rel.h
View File

@@ -221,10 +221,12 @@ typedef struct RelationData
* rd_amcache is available for index and table AMs to cache private data
* about the relation. This must be just a cache since it may get reset
* at any time (in particular, it will get reset by a relcache inval
* message for the relation). If used, it must point to a single memory
* chunk palloc'd in CacheMemoryContext, or in rd_indexcxt for an index
* relation. A relcache reset will include freeing that chunk and setting
* rd_amcache = NULL.
* message for the relation). If used for table AM it must point to a
* single memory chunk palloc'd in CacheMemoryContext, or more complex
* data structure in that memory context to be freed by free_rd_amcache
* method. If used for index AM it must point to a single memory chunk
* palloc'd in rd_indexcxt memory context. A relcache reset will include
* freeing that chunk and setting rd_amcache = NULL.
*/
void *rd_amcache; /* available for use by index/table AM */