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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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2
src/include/optimizer/cost.h
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@@ -54,7 +54,7 @@ extern PGDLLIMPORT double parallel_tuple_cost;
extern PGDLLIMPORT double parallel_setup_cost;
extern PGDLLIMPORT int effective_cache_size;
extern Cost disable_cost;
extern int max_parallel_degree;
extern int max_parallel_workers_per_gather;
extern bool enable_seqscan;
extern bool enable_indexscan;
extern bool enable_indexonlyscan;

4
src/include/optimizer/pathnode.h
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@@ -34,7 +34,7 @@ extern bool add_partial_path_precheck(RelOptInfo *parent_rel,
Cost total_cost, List *pathkeys);
extern Path *create_seqscan_path(PlannerInfo *root, RelOptInfo *rel,
Relids required_outer, int parallel_degree);
Relids required_outer, int parallel_workers);
extern Path *create_samplescan_path(PlannerInfo *root, RelOptInfo *rel,
Relids required_outer);
extern IndexPath *create_index_path(PlannerInfo *root,
@@ -62,7 +62,7 @@ extern BitmapOrPath *create_bitmap_or_path(PlannerInfo *root,
extern TidPath *create_tidscan_path(PlannerInfo *root, RelOptInfo *rel,
List *tidquals, Relids required_outer);
extern AppendPath *create_append_path(RelOptInfo *rel, List *subpaths,
Relids required_outer, int parallel_degree);
Relids required_outer, int parallel_workers);
extern MergeAppendPath *create_merge_append_path(PlannerInfo *root,
RelOptInfo *rel,
List *subpaths,