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Eliminate "parallel degree" terminology.

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This terminology provoked widespread complaints.  So, instead, rename
the GUC max_parallel_degree to max_parallel_workers_per_gather
(leaving room for a possible future GUC max_parallel_workers that acts
as a system-wide limit), and rename the parallel_degree reloption to
parallel_workers.  Rename structure members to match.

These changes create a dump/restore hazard for users of PostgreSQL
9.6beta1 who have set the reloption (or applied the GUC using ALTER
USER or ALTER DATABASE).
This commit is contained in:
Robert Haas
2016-06-09 09:08:27 -04:00
parent 6581e930a8
commit c9ce4a1c61
19 changed files with 99 additions and 99 deletions
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6
src/include/utils/rel.h
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@@ -204,7 +204,7 @@ typedef struct StdRdOptions
AutoVacOpts autovacuum; /* autovacuum-related options */
bool user_catalog_table; /* use as an additional catalog
* relation */
int parallel_degree; /* max number of parallel workers */
int parallel_workers; /* max number of parallel workers */
} StdRdOptions;
#define HEAP_MIN_FILLFACTOR 10
@@ -243,11 +243,11 @@ typedef struct StdRdOptions
/*
* RelationGetParallelDegree
* Returns the relation's parallel_degree. Note multiple eval of argument!
* Returns the relation's parallel_workers. Note multiple eval of argument!
*/
#define RelationGetParallelDegree(relation, defaultpd) \
((relation)->rd_options ? \
((StdRdOptions *) (relation)->rd_options)->parallel_degree : (defaultpd))
((StdRdOptions *) (relation)->rd_options)->parallel_workers : (defaultpd))
/*