Revise GUC names quoting in messages again

After further review, we want to move in the direction of always
quoting GUC names in error messages, rather than the previous (PG16)
wildly mixed practice or the intermittent (mid-PG17) idea of doing
this depending on how possibly confusing the GUC name is.

This commit applies appropriate quotes to (almost?) all mentions of
GUC names in error messages.  It partially supersedes a243569 and
8d9978a, which had moved things a bit in the opposite direction
but which then were abandoned in a partial state.

Author: Peter Smith <smithpb2250@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAHut%2BPv-kSN8SkxSdoHano_wPubqcg5789ejhCDZAcLFceBR-w%40mail.gmail.com

Author: petere

contrib/pg_prewarm/autoprewarm.c

@@ -831,7 +831,7 @@ apw_start_leader_worker(void)
 		ereport(ERROR,
 				(errcode(ERRCODE_INSUFFICIENT_RESOURCES),
 				 errmsg("could not register background process"),
-				 errhint("You may need to increase max_worker_processes.")));
+				 errhint("You may need to increase \"max_worker_processes\".")));
 
 	status = WaitForBackgroundWorkerStartup(handle, &pid);
 	if (status != BGWH_STARTED)
@@ -867,7 +867,7 @@ apw_start_database_worker(void)
 		ereport(ERROR,
 				(errcode(ERRCODE_INSUFFICIENT_RESOURCES),
 				 errmsg("registering dynamic bgworker autoprewarm failed"),
-				 errhint("Consider increasing configuration parameter max_worker_processes.")));
+				 errhint("Consider increasing configuration parameter \"max_worker_processes\".")));
 
 	/*
 	 * Ignore return value; if it fails, postmaster has died, but we have

contrib/pg_stat_statements/pg_stat_statements.c

@@ -1660,7 +1660,7 @@ pg_stat_statements_internal(FunctionCallInfo fcinfo,
 	if (!pgss || !pgss_hash)
 		ereport(ERROR,
 				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
-				 errmsg("pg_stat_statements must be loaded via shared_preload_libraries")));
+				 errmsg("pg_stat_statements must be loaded via \"shared_preload_libraries\"")));
 
 	InitMaterializedSRF(fcinfo, 0);
 
@@ -1989,7 +1989,7 @@ pg_stat_statements_info(PG_FUNCTION_ARGS)
 	if (!pgss || !pgss_hash)
 		ereport(ERROR,
 				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
-				 errmsg("pg_stat_statements must be loaded via shared_preload_libraries")));
+				 errmsg("pg_stat_statements must be loaded via \"shared_preload_libraries\"")));
 
 	/* Build a tuple descriptor for our result type */
 	if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
@@ -2671,7 +2671,7 @@ entry_reset(Oid userid, Oid dbid, uint64 queryid, bool minmax_only)
 	if (!pgss || !pgss_hash)
 		ereport(ERROR,
 				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
-				 errmsg("pg_stat_statements must be loaded via shared_preload_libraries")));
+				 errmsg("pg_stat_statements must be loaded via \"shared_preload_libraries\"")));
 
 	LWLockAcquire(pgss->lock, LW_EXCLUSIVE);
 	num_entries = hash_get_num_entries(pgss_hash);

contrib/sepgsql/hooks.c

@@ -406,7 +406,7 @@ _PG_init(void)
 	if (IsUnderPostmaster)
 		ereport(ERROR,
 				(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
-				 errmsg("sepgsql must be loaded via shared_preload_libraries")));
+				 errmsg("sepgsql must be loaded via \"shared_preload_libraries\"")));
 
 	/*
 	 * Check availability of SELinux on the platform. If disabled, we cannot

contrib/test_decoding/expected/slot.out

@@ -220,7 +220,7 @@ ORDER BY o.slot_name, c.slot_name;
 -- released even when raise error during creating the target slot.
 SELECT 'copy' FROM pg_copy_logical_replication_slot('orig_slot1', 'failed'); -- error
 ERROR:  all replication slots are in use
-HINT:  Free one or increase max_replication_slots.
+HINT:  Free one or increase "max_replication_slots".
 -- temporary slots were dropped automatically
 SELECT pg_drop_replication_slot('orig_slot1');
  pg_drop_replication_slot 

doc/src/sgml/sources.sgml

@@ -533,17 +533,10 @@ Hint:       The addendum, written as a complete sentence.
    <title>Use of Quotes</title>
 
    <para>
-    Always use quotes to delimit file names, user-supplied identifiers, and
-    other variables that might contain words.  Do not use them to mark up
-    variables that will not contain words (for example, operator names).
-   </para>
-
-   <para>
-    In messages containing configuration variable names, do not include quotes
-    when the names are visibly not natural English words, such as when they
-    have underscores, are all-uppercase or have mixed case. Otherwise, quotes
-    must be added. Do include quotes in a message where an arbitrary variable
-    name is to be expanded.
+    Always use quotes to delimit file names, user-supplied identifiers,
+    configuration variable names, and other variables that might contain
+    words.  Do not use them to mark up variables that will not contain words
+    (for example, operator names).
    </para>
 
    <para>

src/backend/access/gin/ginbulk.c

@@ -42,7 +42,7 @@ ginCombineData(RBTNode *existing, const RBTNode *newdata, void *arg)
 			ereport(ERROR,
 					(errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
 					 errmsg("posting list is too long"),
-					 errhint("Reduce maintenance_work_mem.")));
+					 errhint("Reduce \"maintenance_work_mem\".")));
 
 		accum->allocatedMemory -= GetMemoryChunkSpace(eo->list);
 		eo->maxcount *= 2;

src/backend/access/heap/vacuumlazy.c

@@ -2327,7 +2327,7 @@ lazy_check_wraparound_failsafe(LVRelState *vacrel)
 						vacrel->dbname, vacrel->relnamespace, vacrel->relname,
 						vacrel->num_index_scans),
 				 errdetail("The table's relfrozenxid or relminmxid is too far in the past."),
-				 errhint("Consider increasing configuration parameter maintenance_work_mem or autovacuum_work_mem.\n"
+				 errhint("Consider increasing configuration parameter \"maintenance_work_mem\" or \"autovacuum_work_mem\".\n"
 						 "You might also need to consider other ways for VACUUM to keep up with the allocation of transaction IDs.")));
 
 		/* Stop applying cost limits from this point on */

src/backend/access/table/tableamapi.c

@@ -106,14 +106,14 @@ check_default_table_access_method(char **newval, void **extra, GucSource source)
 {
 	if (**newval == '\0')
 	{
-		GUC_check_errdetail("%s cannot be empty.",
+		GUC_check_errdetail("\"%s\" cannot be empty.",
 							"default_table_access_method");
 		return false;
 	}
 
 	if (strlen(*newval) >= NAMEDATALEN)
 	{
-		GUC_check_errdetail("%s is too long (maximum %d characters).",
+		GUC_check_errdetail("\"%s\" is too long (maximum %d characters).",
 							"default_table_access_method", NAMEDATALEN - 1);
 		return false;
 	}

src/backend/access/transam/commit_ts.c

@@ -384,9 +384,9 @@ error_commit_ts_disabled(void)
 			(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
 			 errmsg("could not get commit timestamp data"),
 			 RecoveryInProgress() ?
-			 errhint("Make sure the configuration parameter %s is set on the primary server.",
+			 errhint("Make sure the configuration parameter \"%s\" is set on the primary server.",
 					 "track_commit_timestamp") :
-			 errhint("Make sure the configuration parameter %s is set.",
+			 errhint("Make sure the configuration parameter \"%s\" is set.",
 					 "track_commit_timestamp")));
 }
 

src/backend/access/transam/multixact.c

@@ -1151,7 +1151,7 @@ GetNewMultiXactId(int nmembers, MultiXactOffset *offset)
 								  MultiXactState->offsetStopLimit - nextOffset - 1,
 								  nmembers,
 								  MultiXactState->offsetStopLimit - nextOffset - 1),
-				 errhint("Execute a database-wide VACUUM in database with OID %u with reduced vacuum_multixact_freeze_min_age and vacuum_multixact_freeze_table_age settings.",
+				 errhint("Execute a database-wide VACUUM in database with OID %u with reduced \"vacuum_multixact_freeze_min_age\" and \"vacuum_multixact_freeze_table_age\" settings.",
 						 MultiXactState->oldestMultiXactDB)));
 	}
 
@@ -1187,7 +1187,7 @@ GetNewMultiXactId(int nmembers, MultiXactOffset *offset)
 							   MultiXactState->offsetStopLimit - nextOffset + nmembers,
 							   MultiXactState->oldestMultiXactDB,
 							   MultiXactState->offsetStopLimit - nextOffset + nmembers),
-				 errhint("Execute a database-wide VACUUM in that database with reduced vacuum_multixact_freeze_min_age and vacuum_multixact_freeze_table_age settings.")));
+				 errhint("Execute a database-wide VACUUM in that database with reduced \"vacuum_multixact_freeze_min_age\" and \"vacuum_multixact_freeze_table_age\" settings.")));
 
 	ExtendMultiXactMember(nextOffset, nmembers);