Fill CommonRdOptions with default values in extract_autovac_opts()

Reported-by: Thomas Munro
Reported-by: Pavel Borisov
Discussion: https://postgr.es/m/CA%2BhUKGLZzLR50RBvuqOO3MZ%3DF54ETz-rTp1PDX9uDGP_GqyYqA%40mail.gmail.com

src/backend/access/common/reloptions.c

@@ -2056,6 +2056,34 @@ view_reloptions(Datum reloptions, bool validate)
 									  tab, lengthof(tab));
 }
 
+/*
+ * Fill CommonRdOptions with the default values.
+ */
+void
+fill_default_common_reloptions(CommonRdOptions *common)
+{
+	common->autovacuum.enabled = true;
+	common->autovacuum.vacuum_threshold = -1;
+	common->autovacuum.vacuum_ins_threshold = -2;
+	common->autovacuum.analyze_threshold = -1;
+	common->autovacuum.vacuum_cost_limit = -1;
+	common->autovacuum.freeze_min_age = -1;
+	common->autovacuum.freeze_max_age = -1;
+	common->autovacuum.freeze_table_age = -1;
+	common->autovacuum.multixact_freeze_min_age = -1;
+	common->autovacuum.multixact_freeze_max_age = -1;
+	common->autovacuum.multixact_freeze_table_age = -1;
+	common->autovacuum.log_min_duration = -1;
+	common->autovacuum.vacuum_cost_delay = -1;
+	common->autovacuum.vacuum_scale_factor = -1;
+	common->autovacuum.vacuum_ins_scale_factor = -1;
+	common->autovacuum.analyze_scale_factor = -1;
+	common->parallel_workers = -1;
+	common->user_catalog_table = false;
+	common->vacuum_index_cleanup = STDRD_OPTION_VACUUM_INDEX_CLEANUP_AUTO;
+	common->vacuum_truncate = true;
+}
+
 /*
  * Parse options for heaps, views and toast tables.
  */

src/backend/postmaster/autovacuum.c

@@ -2681,6 +2681,7 @@ extract_autovac_opts(HeapTuple tup, TupleDesc pg_class_desc)
 		   ((Form_pg_class) GETSTRUCT(tup))->relkind == RELKIND_MATVIEW ||
 		   ((Form_pg_class) GETSTRUCT(tup))->relkind == RELKIND_TOASTVALUE);
 
+	fill_default_common_reloptions(&common);
 	relopts = extractRelOptions(tup, pg_class_desc,
 								GetTableAmRoutineByAmOid(((Form_pg_class) GETSTRUCT(tup))->relam),
 								NULL, &common);

src/backend/utils/cache/relcache.c

@@ -480,26 +480,7 @@ RelationParseRelOptions(Relation relation, HeapTuple tuple)
 	{
 		common = MemoryContextAlloc(CacheMemoryContext,
 									sizeof(CommonRdOptions));
-		common->autovacuum.enabled = true;
-		common->autovacuum.vacuum_threshold = -1;
-		common->autovacuum.vacuum_ins_threshold = -2;
-		common->autovacuum.analyze_threshold = -1;
-		common->autovacuum.vacuum_cost_limit = -1;
-		common->autovacuum.freeze_min_age = -1;
-		common->autovacuum.freeze_max_age = -1;
-		common->autovacuum.freeze_table_age = -1;
-		common->autovacuum.multixact_freeze_min_age = -1;
-		common->autovacuum.multixact_freeze_max_age = -1;
-		common->autovacuum.multixact_freeze_table_age = -1;
-		common->autovacuum.log_min_duration = -1;
-		common->autovacuum.vacuum_cost_delay = -1;
-		common->autovacuum.vacuum_scale_factor = -1;
-		common->autovacuum.vacuum_ins_scale_factor = -1;
-		common->autovacuum.analyze_scale_factor = -1;
-		common->parallel_workers = -1;
-		common->user_catalog_table = false;
-		common->vacuum_index_cleanup = STDRD_OPTION_VACUUM_INDEX_CLEANUP_AUTO;
-		common->vacuum_truncate = true;
+		fill_default_common_reloptions(common);
 		relation->rd_common_options = common;
 	}
 	else

src/include/access/reloptions.h

@@ -236,6 +236,7 @@ extern void *build_reloptions(Datum reloptions, bool validate,
 extern void *build_local_reloptions(local_relopts *relopts, Datum options,
 									bool validate);
 
+extern void fill_default_common_reloptions(CommonRdOptions *common);
 extern bytea *heap_reloptions(char relkind, Datum reloptions,
 							  CommonRdOptions *common, bool validate);
 extern bytea *view_reloptions(Datum reloptions, bool validate);