From 32b561d88e7480cd0ab9f79443fbacd4f31dc53c Mon Sep 17 00:00:00 2001
From: Michael Paquier <michael@paquier.xyz>
Date: Wed, 25 Jun 2025 10:22:08 +0900
Subject: [PATCH v5] Refactor handling of VacuumParams

This adds a couple of const markers, while removing pointer uses of
VacuumParams to force the following policy among all the VACUUM-related
calls: do not touch the values given by the caller.

This patch is for HEAD.

Author: Michael P.
---
 src/include/access/heapam.h          |   4 +-
 src/include/access/tableam.h         |   6 +-
 src/include/commands/vacuum.h        |   6 +-
 src/backend/access/heap/vacuumlazy.c |  44 +++++-----
 src/backend/commands/analyze.c       |  26 +++---
 src/backend/commands/cluster.c       |   2 +-
 src/backend/commands/vacuum.c        | 118 ++++++++++++---------------
 src/backend/postmaster/autovacuum.c  |   2 +-
 8 files changed, 98 insertions(+), 110 deletions(-)

diff --git a/src/include/access/heapam.h b/src/include/access/heapam.h
index 3a9424c19c9a..a2bd5a897f87 100644
--- a/src/include/access/heapam.h
+++ b/src/include/access/heapam.h
@@ -21,6 +21,7 @@
 #include "access/skey.h"
 #include "access/table.h"		/* for backward compatibility */
 #include "access/tableam.h"
+#include "commands/vacuum.h"
 #include "nodes/lockoptions.h"
 #include "nodes/primnodes.h"
 #include "storage/bufpage.h"
@@ -396,9 +397,8 @@ extern void log_heap_prune_and_freeze(Relation relation, Buffer buffer,
 									  OffsetNumber *unused, int nunused);
 
 /* in heap/vacuumlazy.c */
-struct VacuumParams;
 extern void heap_vacuum_rel(Relation rel,
-							struct VacuumParams *params, BufferAccessStrategy bstrategy);
+							const VacuumParams params, BufferAccessStrategy bstrategy);
 
 /* in heap/heapam_visibility.c */
 extern bool HeapTupleSatisfiesVisibility(HeapTuple htup, Snapshot snapshot,
diff --git a/src/include/access/tableam.h b/src/include/access/tableam.h
index 8713e12cbfb9..1c9e802a6b12 100644
--- a/src/include/access/tableam.h
+++ b/src/include/access/tableam.h
@@ -20,6 +20,7 @@
 #include "access/relscan.h"
 #include "access/sdir.h"
 #include "access/xact.h"
+#include "commands/vacuum.h"
 #include "executor/tuptable.h"
 #include "storage/read_stream.h"
 #include "utils/rel.h"
@@ -36,7 +37,6 @@ extern PGDLLIMPORT bool synchronize_seqscans;
 struct BulkInsertStateData;
 struct IndexInfo;
 struct SampleScanState;
-struct VacuumParams;
 struct ValidateIndexState;
 
 /*
@@ -645,7 +645,7 @@ typedef struct TableAmRoutine
 	 * integrate with autovacuum's scheduling.
 	 */
 	void		(*relation_vacuum) (Relation rel,
-									struct VacuumParams *params,
+									const VacuumParams params,
 									BufferAccessStrategy bstrategy);
 
 	/*
@@ -1664,7 +1664,7 @@ table_relation_copy_for_cluster(Relation OldTable, Relation NewTable,
  * routine, even if (for ANALYZE) it is part of the same VACUUM command.
  */
 static inline void
-table_relation_vacuum(Relation rel, struct VacuumParams *params,
+table_relation_vacuum(Relation rel, const VacuumParams params,
 					  BufferAccessStrategy bstrategy)
 {
 	rel->rd_tableam->relation_vacuum(rel, params, bstrategy);
diff --git a/src/include/commands/vacuum.h b/src/include/commands/vacuum.h
index bc37a80dc74f..14eeccbd7185 100644
--- a/src/include/commands/vacuum.h
+++ b/src/include/commands/vacuum.h
@@ -336,7 +336,7 @@ extern PGDLLIMPORT int64 parallel_vacuum_worker_delay_ns;
 
 /* in commands/vacuum.c */
 extern void ExecVacuum(ParseState *pstate, VacuumStmt *vacstmt, bool isTopLevel);
-extern void vacuum(List *relations, VacuumParams *params,
+extern void vacuum(List *relations, const VacuumParams params,
 				   BufferAccessStrategy bstrategy, MemoryContext vac_context,
 				   bool isTopLevel);
 extern void vac_open_indexes(Relation relation, LOCKMODE lockmode,
@@ -357,7 +357,7 @@ extern void vac_update_relstats(Relation relation,
 								bool *frozenxid_updated,
 								bool *minmulti_updated,
 								bool in_outer_xact);
-extern bool vacuum_get_cutoffs(Relation rel, const VacuumParams *params,
+extern bool vacuum_get_cutoffs(Relation rel, const VacuumParams params,
 							   struct VacuumCutoffs *cutoffs);
 extern bool vacuum_xid_failsafe_check(const struct VacuumCutoffs *cutoffs);
 extern void vac_update_datfrozenxid(void);
@@ -398,7 +398,7 @@ extern void parallel_vacuum_main(dsm_segment *seg, shm_toc *toc);
 
 /* in commands/analyze.c */
 extern void analyze_rel(Oid relid, RangeVar *relation,
-						VacuumParams *params, List *va_cols, bool in_outer_xact,
+						const VacuumParams params, List *va_cols, bool in_outer_xact,
 						BufferAccessStrategy bstrategy);
 extern bool std_typanalyze(VacAttrStats *stats);
 
diff --git a/src/backend/access/heap/vacuumlazy.c b/src/backend/access/heap/vacuumlazy.c
index 09416450af96..56d456736da0 100644
--- a/src/backend/access/heap/vacuumlazy.c
+++ b/src/backend/access/heap/vacuumlazy.c
@@ -423,7 +423,7 @@ typedef struct LVSavedErrInfo
 /* non-export function prototypes */
 static void lazy_scan_heap(LVRelState *vacrel);
 static void heap_vacuum_eager_scan_setup(LVRelState *vacrel,
-										 VacuumParams *params);
+										 const VacuumParams params);
 static BlockNumber heap_vac_scan_next_block(ReadStream *stream,
 											void *callback_private_data,
 											void *per_buffer_data);
@@ -485,7 +485,7 @@ static void restore_vacuum_error_info(LVRelState *vacrel,
  * vacuum options or for relfrozenxid/relminmxid advancement.
  */
 static void
-heap_vacuum_eager_scan_setup(LVRelState *vacrel, VacuumParams *params)
+heap_vacuum_eager_scan_setup(LVRelState *vacrel, const VacuumParams params)
 {
 	uint32		randseed;
 	BlockNumber allvisible;
@@ -504,7 +504,7 @@ heap_vacuum_eager_scan_setup(LVRelState *vacrel, VacuumParams *params)
 	vacrel->eager_scan_remaining_successes = 0;
 
 	/* If eager scanning is explicitly disabled, just return. */
-	if (params->max_eager_freeze_failure_rate == 0)
+	if (params.max_eager_freeze_failure_rate == 0)
 		return;
 
 	/*
@@ -581,11 +581,11 @@ heap_vacuum_eager_scan_setup(LVRelState *vacrel, VacuumParams *params)
 
 	vacrel->next_eager_scan_region_start = randseed % EAGER_SCAN_REGION_SIZE;
 
-	Assert(params->max_eager_freeze_failure_rate > 0 &&
-		   params->max_eager_freeze_failure_rate <= 1);
+	Assert(params.max_eager_freeze_failure_rate > 0 &&
+		   params.max_eager_freeze_failure_rate <= 1);
 
 	vacrel->eager_scan_max_fails_per_region =
-		params->max_eager_freeze_failure_rate *
+		params.max_eager_freeze_failure_rate *
 		EAGER_SCAN_REGION_SIZE;
 
 	/*
@@ -612,7 +612,7 @@ heap_vacuum_eager_scan_setup(LVRelState *vacrel, VacuumParams *params)
  *		and locked the relation.
  */
 void
-heap_vacuum_rel(Relation rel, VacuumParams *params,
+heap_vacuum_rel(Relation rel, const VacuumParams params,
 				BufferAccessStrategy bstrategy)
 {
 	LVRelState *vacrel;
@@ -634,9 +634,9 @@ heap_vacuum_rel(Relation rel, VacuumParams *params,
 	ErrorContextCallback errcallback;
 	char	  **indnames = NULL;
 
-	verbose = (params->options & VACOPT_VERBOSE) != 0;
+	verbose = (params.options & VACOPT_VERBOSE) != 0;
 	instrument = (verbose || (AmAutoVacuumWorkerProcess() &&
-							  params->log_min_duration >= 0));
+							  params.log_min_duration >= 0));
 	if (instrument)
 	{
 		pg_rusage_init(&ru0);
@@ -699,9 +699,9 @@ heap_vacuum_rel(Relation rel, VacuumParams *params,
 	 * The truncate param allows user to avoid attempting relation truncation,
 	 * though it can't force truncation to happen.
 	 */
-	Assert(params->index_cleanup != VACOPTVALUE_UNSPECIFIED);
-	Assert(params->truncate != VACOPTVALUE_UNSPECIFIED &&
-		   params->truncate != VACOPTVALUE_AUTO);
+	Assert(params.index_cleanup != VACOPTVALUE_UNSPECIFIED);
+	Assert(params.truncate != VACOPTVALUE_UNSPECIFIED &&
+		   params.truncate != VACOPTVALUE_AUTO);
 
 	/*
 	 * While VacuumFailSafeActive is reset to false before calling this, we
@@ -711,14 +711,14 @@ heap_vacuum_rel(Relation rel, VacuumParams *params,
 	vacrel->consider_bypass_optimization = true;
 	vacrel->do_index_vacuuming = true;
 	vacrel->do_index_cleanup = true;
-	vacrel->do_rel_truncate = (params->truncate != VACOPTVALUE_DISABLED);
-	if (params->index_cleanup == VACOPTVALUE_DISABLED)
+	vacrel->do_rel_truncate = (params.truncate != VACOPTVALUE_DISABLED);
+	if (params.index_cleanup == VACOPTVALUE_DISABLED)
 	{
 		/* Force disable index vacuuming up-front */
 		vacrel->do_index_vacuuming = false;
 		vacrel->do_index_cleanup = false;
 	}
-	else if (params->index_cleanup == VACOPTVALUE_ENABLED)
+	else if (params.index_cleanup == VACOPTVALUE_ENABLED)
 	{
 		/* Force index vacuuming.  Note that failsafe can still bypass. */
 		vacrel->consider_bypass_optimization = false;
@@ -726,7 +726,7 @@ heap_vacuum_rel(Relation rel, VacuumParams *params,
 	else
 	{
 		/* Default/auto, make all decisions dynamically */
-		Assert(params->index_cleanup == VACOPTVALUE_AUTO);
+		Assert(params.index_cleanup == VACOPTVALUE_AUTO);
 	}
 
 	/* Initialize page counters explicitly (be tidy) */
@@ -789,7 +789,7 @@ heap_vacuum_rel(Relation rel, VacuumParams *params,
 	 */
 	vacrel->skippedallvis = false;
 	skipwithvm = true;
-	if (params->options & VACOPT_DISABLE_PAGE_SKIPPING)
+	if (params.options & VACOPT_DISABLE_PAGE_SKIPPING)
 	{
 		/*
 		 * Force aggressive mode, and disable skipping blocks using the
@@ -830,7 +830,7 @@ heap_vacuum_rel(Relation rel, VacuumParams *params,
 	 * is already dangerously old.)
 	 */
 	lazy_check_wraparound_failsafe(vacrel);
-	dead_items_alloc(vacrel, params->nworkers);
+	dead_items_alloc(vacrel, params.nworkers);
 
 	/*
 	 * Call lazy_scan_heap to perform all required heap pruning, index
@@ -947,9 +947,9 @@ heap_vacuum_rel(Relation rel, VacuumParams *params,
 	{
 		TimestampTz endtime = GetCurrentTimestamp();
 
-		if (verbose || params->log_min_duration == 0 ||
+		if (verbose || params.log_min_duration == 0 ||
 			TimestampDifferenceExceeds(starttime, endtime,
-									   params->log_min_duration))
+									   params.log_min_duration))
 		{
 			long		secs_dur;
 			int			usecs_dur;
@@ -984,10 +984,10 @@ heap_vacuum_rel(Relation rel, VacuumParams *params,
 				 * Aggressiveness already reported earlier, in dedicated
 				 * VACUUM VERBOSE ereport
 				 */
-				Assert(!params->is_wraparound);
+				Assert(!params.is_wraparound);
 				msgfmt = _("finished vacuuming \"%s.%s.%s\": index scans: %d\n");
 			}
-			else if (params->is_wraparound)
+			else if (params.is_wraparound)
 			{
 				/*
 				 * While it's possible for a VACUUM to be both is_wraparound
diff --git a/src/backend/commands/analyze.c b/src/backend/commands/analyze.c
index 4fffb76e5573..7111d5d5334f 100644
--- a/src/backend/commands/analyze.c
+++ b/src/backend/commands/analyze.c
@@ -76,7 +76,7 @@ static BufferAccessStrategy vac_strategy;
 
 
 static void do_analyze_rel(Relation onerel,
-						   VacuumParams *params, List *va_cols,
+						   const VacuumParams params, List *va_cols,
 						   AcquireSampleRowsFunc acquirefunc, BlockNumber relpages,
 						   bool inh, bool in_outer_xact, int elevel);
 static void compute_index_stats(Relation onerel, double totalrows,
@@ -107,7 +107,7 @@ static Datum ind_fetch_func(VacAttrStatsP stats, int rownum, bool *isNull);
  */
 void
 analyze_rel(Oid relid, RangeVar *relation,
-			VacuumParams *params, List *va_cols, bool in_outer_xact,
+			const VacuumParams params, List *va_cols, bool in_outer_xact,
 			BufferAccessStrategy bstrategy)
 {
 	Relation	onerel;
@@ -116,7 +116,7 @@ analyze_rel(Oid relid, RangeVar *relation,
 	BlockNumber relpages = 0;
 
 	/* Select logging level */
-	if (params->options & VACOPT_VERBOSE)
+	if (params.options & VACOPT_VERBOSE)
 		elevel = INFO;
 	else
 		elevel = DEBUG2;
@@ -138,8 +138,8 @@ analyze_rel(Oid relid, RangeVar *relation,
 	 *
 	 * Make sure to generate only logs for ANALYZE in this case.
 	 */
-	onerel = vacuum_open_relation(relid, relation, params->options & ~(VACOPT_VACUUM),
-								  params->log_min_duration >= 0,
+	onerel = vacuum_open_relation(relid, relation, params.options & ~(VACOPT_VACUUM),
+								  params.log_min_duration >= 0,
 								  ShareUpdateExclusiveLock);
 
 	/* leave if relation could not be opened or locked */
@@ -155,7 +155,7 @@ analyze_rel(Oid relid, RangeVar *relation,
 	 */
 	if (!vacuum_is_permitted_for_relation(RelationGetRelid(onerel),
 										  onerel->rd_rel,
-										  params->options & ~VACOPT_VACUUM))
+										  params.options & ~VACOPT_VACUUM))
 	{
 		relation_close(onerel, ShareUpdateExclusiveLock);
 		return;
@@ -227,7 +227,7 @@ analyze_rel(Oid relid, RangeVar *relation,
 	else
 	{
 		/* No need for a WARNING if we already complained during VACUUM */
-		if (!(params->options & VACOPT_VACUUM))
+		if (!(params.options & VACOPT_VACUUM))
 			ereport(WARNING,
 					(errmsg("skipping \"%s\" --- cannot analyze non-tables or special system tables",
 							RelationGetRelationName(onerel))));
@@ -275,7 +275,7 @@ analyze_rel(Oid relid, RangeVar *relation,
  * appropriate acquirefunc for each child table.
  */
 static void
-do_analyze_rel(Relation onerel, VacuumParams *params,
+do_analyze_rel(Relation onerel, const VacuumParams params,
 			   List *va_cols, AcquireSampleRowsFunc acquirefunc,
 			   BlockNumber relpages, bool inh, bool in_outer_xact,
 			   int elevel)
@@ -309,9 +309,9 @@ do_analyze_rel(Relation onerel, VacuumParams *params,
 	PgStat_Counter startreadtime = 0;
 	PgStat_Counter startwritetime = 0;
 
-	verbose = (params->options & VACOPT_VERBOSE) != 0;
+	verbose = (params.options & VACOPT_VERBOSE) != 0;
 	instrument = (verbose || (AmAutoVacuumWorkerProcess() &&
-							  params->log_min_duration >= 0));
+							  params.log_min_duration >= 0));
 	if (inh)
 		ereport(elevel,
 				(errmsg("analyzing \"%s.%s\" inheritance tree",
@@ -706,7 +706,7 @@ do_analyze_rel(Relation onerel, VacuumParams *params,
 	 * amvacuumcleanup() when called in ANALYZE-only mode.  The only exception
 	 * among core index AMs is GIN/ginvacuumcleanup().
 	 */
-	if (!(params->options & VACOPT_VACUUM))
+	if (!(params.options & VACOPT_VACUUM))
 	{
 		for (ind = 0; ind < nindexes; ind++)
 		{
@@ -736,9 +736,9 @@ do_analyze_rel(Relation onerel, VacuumParams *params,
 	{
 		TimestampTz endtime = GetCurrentTimestamp();
 
-		if (verbose || params->log_min_duration == 0 ||
+		if (verbose || params.log_min_duration == 0 ||
 			TimestampDifferenceExceeds(starttime, endtime,
-									   params->log_min_duration))
+									   params.log_min_duration))
 		{
 			long		delay_in_ms;
 			WalUsage	walusage;
diff --git a/src/backend/commands/cluster.c b/src/backend/commands/cluster.c
index 54a08e4102e1..b55221d44cd0 100644
--- a/src/backend/commands/cluster.c
+++ b/src/backend/commands/cluster.c
@@ -917,7 +917,7 @@ copy_table_data(Relation NewHeap, Relation OldHeap, Relation OldIndex, bool verb
 	 * not to be aggressive about this.
 	 */
 	memset(&params, 0, sizeof(VacuumParams));
-	vacuum_get_cutoffs(OldHeap, &params, &cutoffs);
+	vacuum_get_cutoffs(OldHeap, params, &cutoffs);
 
 	/*
 	 * FreezeXid will become the table's new relfrozenxid, and that mustn't go
diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c
index 02993d320daf..733ef40ae7c5 100644
--- a/src/backend/commands/vacuum.c
+++ b/src/backend/commands/vacuum.c
@@ -124,7 +124,7 @@ static void vac_truncate_clog(TransactionId frozenXID,
 							  MultiXactId minMulti,
 							  TransactionId lastSaneFrozenXid,
 							  MultiXactId lastSaneMinMulti);
-static bool vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
+static bool vacuum_rel(Oid relid, RangeVar *relation, VacuumParams params,
 					   BufferAccessStrategy bstrategy);
 static double compute_parallel_delay(void);
 static VacOptValue get_vacoptval_from_boolean(DefElem *def);
@@ -465,7 +465,7 @@ ExecVacuum(ParseState *pstate, VacuumStmt *vacstmt, bool isTopLevel)
 	}
 
 	/* Now go through the common routine */
-	vacuum(vacstmt->rels, &params, bstrategy, vac_context, isTopLevel);
+	vacuum(vacstmt->rels, params, bstrategy, vac_context, isTopLevel);
 
 	/* Finally, clean up the vacuum memory context */
 	MemoryContextDelete(vac_context);
@@ -494,7 +494,7 @@ ExecVacuum(ParseState *pstate, VacuumStmt *vacstmt, bool isTopLevel)
  * memory context that will not disappear at transaction commit.
  */
 void
-vacuum(List *relations, VacuumParams *params, BufferAccessStrategy bstrategy,
+vacuum(List *relations, const VacuumParams params, BufferAccessStrategy bstrategy,
 	   MemoryContext vac_context, bool isTopLevel)
 {
 	static bool in_vacuum = false;
@@ -503,9 +503,7 @@ vacuum(List *relations, VacuumParams *params, BufferAccessStrategy bstrategy,
 	volatile bool in_outer_xact,
 				use_own_xacts;
 
-	Assert(params != NULL);
-
-	stmttype = (params->options & VACOPT_VACUUM) ? "VACUUM" : "ANALYZE";
+	stmttype = (params.options & VACOPT_VACUUM) ? "VACUUM" : "ANALYZE";
 
 	/*
 	 * We cannot run VACUUM inside a user transaction block; if we were inside
@@ -515,7 +513,7 @@ vacuum(List *relations, VacuumParams *params, BufferAccessStrategy bstrategy,
 	 *
 	 * ANALYZE (without VACUUM) can run either way.
 	 */
-	if (params->options & VACOPT_VACUUM)
+	if (params.options & VACOPT_VACUUM)
 	{
 		PreventInTransactionBlock(isTopLevel, stmttype);
 		in_outer_xact = false;
@@ -538,7 +536,7 @@ vacuum(List *relations, VacuumParams *params, BufferAccessStrategy bstrategy,
 	 * Build list of relation(s) to process, putting any new data in
 	 * vac_context for safekeeping.
 	 */
-	if (params->options & VACOPT_ONLY_DATABASE_STATS)
+	if (params.options & VACOPT_ONLY_DATABASE_STATS)
 	{
 		/* We don't process any tables in this case */
 		Assert(relations == NIL);
@@ -554,7 +552,7 @@ vacuum(List *relations, VacuumParams *params, BufferAccessStrategy bstrategy,
 			List	   *sublist;
 			MemoryContext old_context;
 
-			sublist = expand_vacuum_rel(vrel, vac_context, params->options);
+			sublist = expand_vacuum_rel(vrel, vac_context, params.options);
 			old_context = MemoryContextSwitchTo(vac_context);
 			newrels = list_concat(newrels, sublist);
 			MemoryContextSwitchTo(old_context);
@@ -562,7 +560,7 @@ vacuum(List *relations, VacuumParams *params, BufferAccessStrategy bstrategy,
 		relations = newrels;
 	}
 	else
-		relations = get_all_vacuum_rels(vac_context, params->options);
+		relations = get_all_vacuum_rels(vac_context, params.options);
 
 	/*
 	 * Decide whether we need to start/commit our own transactions.
@@ -578,11 +576,11 @@ vacuum(List *relations, VacuumParams *params, BufferAccessStrategy bstrategy,
 	 * transaction block, and also in an autovacuum worker, use own
 	 * transactions so we can release locks sooner.
 	 */
-	if (params->options & VACOPT_VACUUM)
+	if (params.options & VACOPT_VACUUM)
 		use_own_xacts = true;
 	else
 	{
-		Assert(params->options & VACOPT_ANALYZE);
+		Assert(params.options & VACOPT_ANALYZE);
 		if (AmAutoVacuumWorkerProcess())
 			use_own_xacts = true;
 		else if (in_outer_xact)
@@ -633,21 +631,13 @@ vacuum(List *relations, VacuumParams *params, BufferAccessStrategy bstrategy,
 		{
 			VacuumRelation *vrel = lfirst_node(VacuumRelation, cur);
 
-			if (params->options & VACOPT_VACUUM)
+			if (params.options & VACOPT_VACUUM)
 			{
-				VacuumParams params_copy;
-
-				/*
-				 * vacuum_rel() scribbles on the parameters, so give it a copy
-				 * to avoid affecting other relations.
-				 */
-				memcpy(&params_copy, params, sizeof(VacuumParams));
-
-				if (!vacuum_rel(vrel->oid, vrel->relation, &params_copy, bstrategy))
+				if (!vacuum_rel(vrel->oid, vrel->relation, params, bstrategy))
 					continue;
 			}
 
-			if (params->options & VACOPT_ANALYZE)
+			if (params.options & VACOPT_ANALYZE)
 			{
 				/*
 				 * If using separate xacts, start one for analyze. Otherwise,
@@ -711,8 +701,8 @@ vacuum(List *relations, VacuumParams *params, BufferAccessStrategy bstrategy,
 		StartTransactionCommand();
 	}
 
-	if ((params->options & VACOPT_VACUUM) &&
-		!(params->options & VACOPT_SKIP_DATABASE_STATS))
+	if ((params.options & VACOPT_VACUUM) &&
+		!(params.options & VACOPT_SKIP_DATABASE_STATS))
 	{
 		/*
 		 * Update pg_database.datfrozenxid, and truncate pg_xact if possible.
@@ -1110,7 +1100,7 @@ get_all_vacuum_rels(MemoryContext vac_context, int options)
  * minimum).
  */
 bool
-vacuum_get_cutoffs(Relation rel, const VacuumParams *params,
+vacuum_get_cutoffs(Relation rel, const VacuumParams params,
 				   struct VacuumCutoffs *cutoffs)
 {
 	int			freeze_min_age,
@@ -1126,10 +1116,10 @@ vacuum_get_cutoffs(Relation rel, const VacuumParams *params,
 				aggressiveMXIDCutoff;
 
 	/* Use mutable copies of freeze age parameters */
-	freeze_min_age = params->freeze_min_age;
-	multixact_freeze_min_age = params->multixact_freeze_min_age;
-	freeze_table_age = params->freeze_table_age;
-	multixact_freeze_table_age = params->multixact_freeze_table_age;
+	freeze_min_age = params.freeze_min_age;
+	multixact_freeze_min_age = params.multixact_freeze_min_age;
+	freeze_table_age = params.freeze_table_age;
+	multixact_freeze_table_age = params.multixact_freeze_table_age;
 
 	/* Set pg_class fields in cutoffs */
 	cutoffs->relfrozenxid = rel->rd_rel->relfrozenxid;
@@ -2006,7 +1996,7 @@ vac_truncate_clog(TransactionId frozenXID,
  *		At entry and exit, we are not inside a transaction.
  */
 static bool
-vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
+vacuum_rel(Oid relid, RangeVar *relation, VacuumParams params,
 		   BufferAccessStrategy bstrategy)
 {
 	LOCKMODE	lmode;
@@ -2019,18 +2009,16 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 	int			save_nestlevel;
 	VacuumParams toast_vacuum_params;
 
-	Assert(params != NULL);
-
 	/*
 	 * This function scribbles on the parameters, so make a copy early to
 	 * avoid affecting the TOAST table (if we do end up recursing to it).
 	 */
-	memcpy(&toast_vacuum_params, params, sizeof(VacuumParams));
+	memcpy(&toast_vacuum_params, &params, sizeof(VacuumParams));
 
 	/* Begin a transaction for vacuuming this relation */
 	StartTransactionCommand();
 
-	if (!(params->options & VACOPT_FULL))
+	if (!(params.options & VACOPT_FULL))
 	{
 		/*
 		 * In lazy vacuum, we can set the PROC_IN_VACUUM flag, which lets
@@ -2056,7 +2044,7 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 		 */
 		LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE);
 		MyProc->statusFlags |= PROC_IN_VACUUM;
-		if (params->is_wraparound)
+		if (params.is_wraparound)
 			MyProc->statusFlags |= PROC_VACUUM_FOR_WRAPAROUND;
 		ProcGlobal->statusFlags[MyProc->pgxactoff] = MyProc->statusFlags;
 		LWLockRelease(ProcArrayLock);
@@ -2080,12 +2068,12 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 	 * vacuum, but just ShareUpdateExclusiveLock for concurrent vacuum. Either
 	 * way, we can be sure that no other backend is vacuuming the same table.
 	 */
-	lmode = (params->options & VACOPT_FULL) ?
+	lmode = (params.options & VACOPT_FULL) ?
 		AccessExclusiveLock : ShareUpdateExclusiveLock;
 
 	/* open the relation and get the appropriate lock on it */
-	rel = vacuum_open_relation(relid, relation, params->options,
-							   params->log_min_duration >= 0, lmode);
+	rel = vacuum_open_relation(relid, relation, params.options,
+							   params.log_min_duration >= 0, lmode);
 
 	/* leave if relation could not be opened or locked */
 	if (!rel)
@@ -2100,8 +2088,8 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 	 * This is only safe to do because we hold a session lock on the main
 	 * relation that prevents concurrent deletion.
 	 */
-	if (OidIsValid(params->toast_parent))
-		priv_relid = params->toast_parent;
+	if (OidIsValid(params.toast_parent))
+		priv_relid = params.toast_parent;
 	else
 		priv_relid = RelationGetRelid(rel);
 
@@ -2114,7 +2102,7 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 	 */
 	if (!vacuum_is_permitted_for_relation(priv_relid,
 										  rel->rd_rel,
-										  params->options & ~VACOPT_ANALYZE))
+										  params.options & ~VACOPT_ANALYZE))
 	{
 		relation_close(rel, lmode);
 		PopActiveSnapshot();
@@ -2185,7 +2173,7 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 	 * Set index_cleanup option based on index_cleanup reloption if it wasn't
 	 * specified in VACUUM command, or when running in an autovacuum worker
 	 */
-	if (params->index_cleanup == VACOPTVALUE_UNSPECIFIED)
+	if (params.index_cleanup == VACOPTVALUE_UNSPECIFIED)
 	{
 		StdRdOptIndexCleanup vacuum_index_cleanup;
 
@@ -2196,23 +2184,23 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 				((StdRdOptions *) rel->rd_options)->vacuum_index_cleanup;
 
 		if (vacuum_index_cleanup == STDRD_OPTION_VACUUM_INDEX_CLEANUP_AUTO)
-			params->index_cleanup = VACOPTVALUE_AUTO;
+			params.index_cleanup = VACOPTVALUE_AUTO;
 		else if (vacuum_index_cleanup == STDRD_OPTION_VACUUM_INDEX_CLEANUP_ON)
-			params->index_cleanup = VACOPTVALUE_ENABLED;
+			params.index_cleanup = VACOPTVALUE_ENABLED;
 		else
 		{
 			Assert(vacuum_index_cleanup ==
 				   STDRD_OPTION_VACUUM_INDEX_CLEANUP_OFF);
-			params->index_cleanup = VACOPTVALUE_DISABLED;
+			params.index_cleanup = VACOPTVALUE_DISABLED;
 		}
 	}
 
 #ifdef USE_INJECTION_POINTS
-	if (params->index_cleanup == VACOPTVALUE_AUTO)
+	if (params.index_cleanup == VACOPTVALUE_AUTO)
 		INJECTION_POINT("vacuum-index-cleanup-auto", NULL);
-	else if (params->index_cleanup == VACOPTVALUE_DISABLED)
+	else if (params.index_cleanup == VACOPTVALUE_DISABLED)
 		INJECTION_POINT("vacuum-index-cleanup-disabled", NULL);
-	else if (params->index_cleanup == VACOPTVALUE_ENABLED)
+	else if (params.index_cleanup == VACOPTVALUE_ENABLED)
 		INJECTION_POINT("vacuum-index-cleanup-enabled", NULL);
 #endif
 
@@ -2222,36 +2210,36 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 	 */
 	if (rel->rd_options != NULL &&
 		((StdRdOptions *) rel->rd_options)->vacuum_max_eager_freeze_failure_rate >= 0)
-		params->max_eager_freeze_failure_rate =
+		params.max_eager_freeze_failure_rate =
 			((StdRdOptions *) rel->rd_options)->vacuum_max_eager_freeze_failure_rate;
 
 	/*
 	 * Set truncate option based on truncate reloption or GUC if it wasn't
 	 * specified in VACUUM command, or when running in an autovacuum worker
 	 */
-	if (params->truncate == VACOPTVALUE_UNSPECIFIED)
+	if (params.truncate == VACOPTVALUE_UNSPECIFIED)
 	{
 		StdRdOptions *opts = (StdRdOptions *) rel->rd_options;
 
 		if (opts && opts->vacuum_truncate_set)
 		{
 			if (opts->vacuum_truncate)
-				params->truncate = VACOPTVALUE_ENABLED;
+				params.truncate = VACOPTVALUE_ENABLED;
 			else
-				params->truncate = VACOPTVALUE_DISABLED;
+				params.truncate = VACOPTVALUE_DISABLED;
 		}
 		else if (vacuum_truncate)
-			params->truncate = VACOPTVALUE_ENABLED;
+			params.truncate = VACOPTVALUE_ENABLED;
 		else
-			params->truncate = VACOPTVALUE_DISABLED;
+			params.truncate = VACOPTVALUE_DISABLED;
 	}
 
 #ifdef USE_INJECTION_POINTS
-	if (params->truncate == VACOPTVALUE_AUTO)
+	if (params.truncate == VACOPTVALUE_AUTO)
 		INJECTION_POINT("vacuum-truncate-auto", NULL);
-	else if (params->truncate == VACOPTVALUE_DISABLED)
+	else if (params.truncate == VACOPTVALUE_DISABLED)
 		INJECTION_POINT("vacuum-truncate-disabled", NULL);
-	else if (params->truncate == VACOPTVALUE_ENABLED)
+	else if (params.truncate == VACOPTVALUE_ENABLED)
 		INJECTION_POINT("vacuum-truncate-enabled", NULL);
 #endif
 
@@ -2261,9 +2249,9 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 	 * automatically rebuilt by cluster_rel so we shouldn't recurse to it,
 	 * unless PROCESS_MAIN is disabled.
 	 */
-	if ((params->options & VACOPT_PROCESS_TOAST) != 0 &&
-		((params->options & VACOPT_FULL) == 0 ||
-		 (params->options & VACOPT_PROCESS_MAIN) == 0))
+	if ((params.options & VACOPT_PROCESS_TOAST) != 0 &&
+		((params.options & VACOPT_FULL) == 0 ||
+		 (params.options & VACOPT_PROCESS_MAIN) == 0))
 		toast_relid = rel->rd_rel->reltoastrelid;
 	else
 		toast_relid = InvalidOid;
@@ -2286,16 +2274,16 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 	 * table is required (e.g., PROCESS_TOAST is set), we force PROCESS_MAIN
 	 * to be set when we recurse to the TOAST table.
 	 */
-	if (params->options & VACOPT_PROCESS_MAIN)
+	if (params.options & VACOPT_PROCESS_MAIN)
 	{
 		/*
 		 * Do the actual work --- either FULL or "lazy" vacuum
 		 */
-		if (params->options & VACOPT_FULL)
+		if (params.options & VACOPT_FULL)
 		{
 			ClusterParams cluster_params = {0};
 
-			if ((params->options & VACOPT_VERBOSE) != 0)
+			if ((params.options & VACOPT_VERBOSE) != 0)
 				cluster_params.options |= CLUOPT_VERBOSE;
 
 			/* VACUUM FULL is now a variant of CLUSTER; see cluster.c */
@@ -2342,7 +2330,7 @@ vacuum_rel(Oid relid, RangeVar *relation, VacuumParams *params,
 		toast_vacuum_params.options |= VACOPT_PROCESS_MAIN;
 		toast_vacuum_params.toast_parent = relid;
 
-		vacuum_rel(toast_relid, NULL, &toast_vacuum_params, bstrategy);
+		vacuum_rel(toast_relid, NULL, toast_vacuum_params, bstrategy);
 	}
 
 	/*
diff --git a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
index 451fb90a610a..9474095f271a 100644
--- a/src/backend/postmaster/autovacuum.c
+++ b/src/backend/postmaster/autovacuum.c
@@ -3190,7 +3190,7 @@ autovacuum_do_vac_analyze(autovac_table *tab, BufferAccessStrategy bstrategy)
 	rel_list = list_make1(rel);
 	MemoryContextSwitchTo(old_context);
 
-	vacuum(rel_list, &tab->at_params, bstrategy, vac_context, true);
+	vacuum(rel_list, tab->at_params, bstrategy, vac_context, true);
 
 	MemoryContextDelete(vac_context);
 }
-- 
2.50.0

