Add const to values and nulls arguments

This excludes any changes that would change the external AM APIs.

Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>
Discussion: https://www.postgresql.org/message-id/flat/14c31f4a-0347-0805-dce8-93a9072c05a5%40eisentraut.org

src/backend/access/brin/brin.c

@@ -80,7 +80,7 @@ static void union_tuples(BrinDesc *bdesc, BrinMemTuple *a,
 						 BrinTuple *b);
 static void brin_vacuum_scan(Relation idxrel, BufferAccessStrategy strategy);
 static bool add_values_to_range(Relation idxRel, BrinDesc *bdesc,
-								BrinMemTuple *dtup, Datum *values, bool *nulls);
+								BrinMemTuple *dtup, const Datum *values, const bool *nulls);
 static bool check_null_keys(BrinValues *bval, ScanKey *nullkeys, int nnullkeys);
 
 /*
@@ -1774,7 +1774,7 @@ brin_vacuum_scan(Relation idxrel, BufferAccessStrategy strategy)
 
 static bool
 add_values_to_range(Relation idxRel, BrinDesc *bdesc, BrinMemTuple *dtup,
-					Datum *values, bool *nulls)
+					const Datum *values, const bool *nulls)
 {
 	int			keyno;
 

src/backend/access/common/heaptuple.c

@@ -205,8 +205,8 @@ getmissingattr(TupleDesc tupleDesc,
  */
 Size
 heap_compute_data_size(TupleDesc tupleDesc,
-					   Datum *values,
-					   bool *isnull)
+					   const Datum *values,
+					   const bool *isnull)
 {
 	Size		data_length = 0;
 	int			i;
@@ -390,7 +390,7 @@ fill_val(Form_pg_attribute att,
  */
 void
 heap_fill_tuple(TupleDesc tupleDesc,
-				Datum *values, bool *isnull,
+				const Datum *values, const bool *isnull,
 				char *data, Size data_size,
 				uint16 *infomask, bits8 *bit)
 {
@@ -1106,8 +1106,8 @@ heap_copy_tuple_as_datum(HeapTuple tuple, TupleDesc tupleDesc)
  */
 HeapTuple
 heap_form_tuple(TupleDesc tupleDescriptor,
-				Datum *values,
-				bool *isnull)
+				const Datum *values,
+				const bool *isnull)
 {
 	HeapTuple	tuple;			/* return tuple */
 	HeapTupleHeader td;			/* tuple data */
@@ -1200,9 +1200,9 @@ heap_form_tuple(TupleDesc tupleDescriptor,
 HeapTuple
 heap_modify_tuple(HeapTuple tuple,
 				  TupleDesc tupleDesc,
-				  Datum *replValues,
-				  bool *replIsnull,
-				  bool *doReplace)
+				  const Datum *replValues,
+				  const bool *replIsnull,
+				  const bool *doReplace)
 {
 	int			numberOfAttributes = tupleDesc->natts;
 	int			attoff;
@@ -1269,9 +1269,9 @@ HeapTuple
 heap_modify_tuple_by_cols(HeapTuple tuple,
 						  TupleDesc tupleDesc,
 						  int nCols,
-						  int *replCols,
-						  Datum *replValues,
-						  bool *replIsnull)
+						  const int *replCols,
+						  const Datum *replValues,
+						  const bool *replIsnull)
 {
 	int			numberOfAttributes = tupleDesc->natts;
 	Datum	   *values;
@@ -1442,8 +1442,8 @@ heap_freetuple(HeapTuple htup)
  */
 MinimalTuple
 heap_form_minimal_tuple(TupleDesc tupleDescriptor,
-						Datum *values,
-						bool *isnull)
+						const Datum *values,
+						const bool *isnull)
 {
 	MinimalTuple tuple;			/* return tuple */
 	Size		len,

src/backend/access/common/indextuple.c

@@ -42,8 +42,8 @@
   */
 IndexTuple
 index_form_tuple(TupleDesc tupleDescriptor,
-				 Datum *values,
-				 bool *isnull)
+				 const Datum *values,
+				 const bool *isnull)
 {
 	return index_form_tuple_context(tupleDescriptor, values, isnull,
 									CurrentMemoryContext);
@@ -63,8 +63,8 @@ index_form_tuple(TupleDesc tupleDescriptor,
  */
 IndexTuple
 index_form_tuple_context(TupleDesc tupleDescriptor,
-						 Datum *values,
-						 bool *isnull,
+						 const Datum *values,
+						 const bool *isnull,
 						 MemoryContext context)
 {
 	char	   *tp;				/* tuple pointer */
@@ -79,8 +79,8 @@ index_form_tuple_context(TupleDesc tupleDescriptor,
 	int			numberOfAttributes = tupleDescriptor->natts;
 
 #ifdef TOAST_INDEX_HACK
-	Datum		untoasted_values[INDEX_MAX_KEYS];
-	bool		untoasted_free[INDEX_MAX_KEYS];
+	Datum		untoasted_values[INDEX_MAX_KEYS] = {0};
+	bool		untoasted_free[INDEX_MAX_KEYS] = {0};
 #endif
 
 	if (numberOfAttributes > INDEX_MAX_KEYS)

src/backend/access/gist/gistutil.c

@@ -573,7 +573,7 @@ gistdentryinit(GISTSTATE *giststate, int nkey, GISTENTRY *e,
 
 IndexTuple
 gistFormTuple(GISTSTATE *giststate, Relation r,
-			  Datum *attdata, bool *isnull, bool isleaf)
+			  const Datum *attdata, const bool *isnull, bool isleaf)
 {
 	Datum		compatt[INDEX_MAX_KEYS];
 	IndexTuple	res;
@@ -594,7 +594,7 @@ gistFormTuple(GISTSTATE *giststate, Relation r,
 
 void
 gistCompressValues(GISTSTATE *giststate, Relation r,
-				   Datum *attdata, bool *isnull, bool isleaf, Datum *compatt)
+				   const Datum *attdata, const bool *isnull, bool isleaf, Datum *compatt)
 {
 	int			i;
 

src/backend/access/hash/hashsort.c

@@ -106,7 +106,7 @@ _h_spooldestroy(HSpool *hspool)
  * spool an index entry into the sort file.
  */
 void
-_h_spool(HSpool *hspool, ItemPointer self, Datum *values, bool *isnull)
+_h_spool(HSpool *hspool, ItemPointer self, const Datum *values, const bool *isnull)
 {
 	tuplesort_putindextuplevalues(hspool->sortstate, hspool->index,
 								  self, values, isnull);

src/backend/access/index/genam.c

@@ -175,7 +175,7 @@ IndexScanEnd(IndexScanDesc scan)
  */
 char *
 BuildIndexValueDescription(Relation indexRelation,
-						   Datum *values, bool *isnull)
+						   const Datum *values, const bool *isnull)
 {
 	StringInfoData buf;
 	Form_pg_index idxrec;

src/backend/access/spgist/spgutils.c

@@ -788,7 +788,7 @@ memcpyInnerDatum(void *target, SpGistTypeDesc *att, Datum datum)
  */
 Size
 SpGistGetLeafTupleSize(TupleDesc tupleDescriptor,
-					   Datum *datums, bool *isnulls)
+					   const Datum *datums, const bool *isnulls)
 {
 	Size		size;
 	Size		data_size;
@@ -841,7 +841,7 @@ SpGistGetLeafTupleSize(TupleDesc tupleDescriptor,
  */
 SpGistLeafTuple
 spgFormLeafTuple(SpGistState *state, ItemPointer heapPtr,
-				 Datum *datums, bool *isnulls)
+				 const Datum *datums, const bool *isnulls)
 {
 	SpGistLeafTuple tup;
 	TupleDesc	tupleDescriptor = state->leafTupDesc;

src/backend/access/table/toast_helper.c

@@ -316,7 +316,7 @@ toast_tuple_cleanup(ToastTupleContext *ttc)
  * relation.
  */
 void
-toast_delete_external(Relation rel, Datum *values, bool *isnull,
+toast_delete_external(Relation rel, const Datum *values, const bool *isnull,
 					  bool is_speculative)
 {
 	TupleDesc	tupleDesc = rel->rd_att;