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Commite27f4ee

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Change fastgetattr and heap_getattr to inline functions
They were macros previously, but recent callsite additions made Coveritycomplain about one of the assertions being always true. This changecould have been made a long time ago, but the Coverity complain brokethe inertia.Reviewed-by: Michael Paquier <michael@paquier.xyz>Reviewed-by: Japin Li <japinli@hotmail.com>Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>Discussion:https://postgr.es/m/202203241021.uts52sczx3al@alvherre.pgsql
1 parent0bd7af0 commite27f4ee

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2 files changed

+69
-128
lines changed

2 files changed

+69
-128
lines changed

‎src/backend/access/heap/heapam.c‎

Lines changed: 0 additions & 46 deletions
Original file line numberDiff line numberDiff line change
@@ -1131,52 +1131,6 @@ heapgettup_pagemode(HeapScanDesc scan,
11311131
}
11321132

11331133

1134-
#if defined(DISABLE_COMPLEX_MACRO)
1135-
/*
1136-
* This is formatted so oddly so that the correspondence to the macro
1137-
* definition in access/htup_details.h is maintained.
1138-
*/
1139-
Datum
1140-
fastgetattr(HeapTupletup,intattnum,TupleDesctupleDesc,
1141-
bool*isnull)
1142-
{
1143-
return (
1144-
(attnum)>0 ?
1145-
(
1146-
(*(isnull)= false),
1147-
HeapTupleNoNulls(tup) ?
1148-
(
1149-
TupleDescAttr((tupleDesc), (attnum)-1)->attcacheoff >=0 ?
1150-
(
1151-
fetchatt(TupleDescAttr((tupleDesc), (attnum)-1),
1152-
(char*) (tup)->t_data+ (tup)->t_data->t_hoff+
1153-
TupleDescAttr((tupleDesc), (attnum)-1)->attcacheoff)
1154-
)
1155-
:
1156-
nocachegetattr((tup), (attnum), (tupleDesc))
1157-
)
1158-
:
1159-
(
1160-
att_isnull((attnum)-1, (tup)->t_data->t_bits) ?
1161-
(
1162-
(*(isnull)= true),
1163-
(Datum)NULL
1164-
)
1165-
:
1166-
(
1167-
nocachegetattr((tup), (attnum), (tupleDesc))
1168-
)
1169-
)
1170-
)
1171-
:
1172-
(
1173-
(Datum)NULL
1174-
)
1175-
);
1176-
}
1177-
#endif/* defined(DISABLE_COMPLEX_MACRO) */
1178-
1179-
11801134
/* ----------------------------------------------------------------
11811135
* heap access method interface
11821136
* ----------------------------------------------------------------

‎src/include/access/htup_details.h‎

Lines changed: 69 additions & 82 deletions
Original file line numberDiff line numberDiff line change
@@ -690,88 +690,6 @@ struct MinimalTupleData
690690
#defineHeapTupleClearHeapOnly(tuple) \
691691
HeapTupleHeaderClearHeapOnly((tuple)->t_data)
692692

693-
694-
/* ----------------
695-
*fastgetattr
696-
*
697-
*Fetch a user attribute's value as a Datum (might be either a
698-
*value, or a pointer into the data area of the tuple).
699-
*
700-
*This must not be used when a system attribute might be requested.
701-
*Furthermore, the passed attnum MUST be valid. Use heap_getattr()
702-
*instead, if in doubt.
703-
*
704-
*This gets called many times, so we macro the cacheable and NULL
705-
*lookups, and call nocachegetattr() for the rest.
706-
* ----------------
707-
*/
708-
709-
#if !defined(DISABLE_COMPLEX_MACRO)
710-
711-
#definefastgetattr(tup,attnum,tupleDesc,isnull)\
712-
(\
713-
AssertMacro((attnum) > 0),\
714-
(*(isnull) = false),\
715-
HeapTupleNoNulls(tup) ?\
716-
(\
717-
TupleDescAttr((tupleDesc), (attnum)-1)->attcacheoff >= 0 ?\
718-
(\
719-
fetchatt(TupleDescAttr((tupleDesc), (attnum)-1),\
720-
(char *) (tup)->t_data + (tup)->t_data->t_hoff +\
721-
TupleDescAttr((tupleDesc), (attnum)-1)->attcacheoff)\
722-
)\
723-
:\
724-
nocachegetattr((tup), (attnum), (tupleDesc))\
725-
)\
726-
:\
727-
(\
728-
att_isnull((attnum)-1, (tup)->t_data->t_bits) ?\
729-
(\
730-
(*(isnull) = true),\
731-
(Datum)NULL\
732-
)\
733-
:\
734-
(\
735-
nocachegetattr((tup), (attnum), (tupleDesc))\
736-
)\
737-
)\
738-
)
739-
#else/* defined(DISABLE_COMPLEX_MACRO) */
740-
741-
externDatumfastgetattr(HeapTupletup,intattnum,TupleDesctupleDesc,
742-
bool*isnull);
743-
#endif/* defined(DISABLE_COMPLEX_MACRO) */
744-
745-
746-
/* ----------------
747-
*heap_getattr
748-
*
749-
*Extract an attribute of a heap tuple and return it as a Datum.
750-
*This works for either system or user attributes. The given attnum
751-
*is properly range-checked.
752-
*
753-
*If the field in question has a NULL value, we return a zero Datum
754-
*and set *isnull == true. Otherwise, we set *isnull == false.
755-
*
756-
*<tup> is the pointer to the heap tuple. <attnum> is the attribute
757-
*number of the column (field) caller wants. <tupleDesc> is a
758-
*pointer to the structure describing the row and all its fields.
759-
* ----------------
760-
*/
761-
#defineheap_getattr(tup,attnum,tupleDesc,isnull) \
762-
( \
763-
((attnum) > 0) ? \
764-
( \
765-
((attnum) > (int) HeapTupleHeaderGetNatts((tup)->t_data)) ? \
766-
getmissingattr((tupleDesc), (attnum), (isnull)) \
767-
: \
768-
fastgetattr((tup), (attnum), (tupleDesc), (isnull)) \
769-
) \
770-
: \
771-
heap_getsysattr((tup), (attnum), (tupleDesc), (isnull)) \
772-
)
773-
774-
775693
/* prototypes for functions in common/heaptuple.c */
776694
externSizeheap_compute_data_size(TupleDesctupleDesc,
777695
Datum*values,bool*isnull);
@@ -815,4 +733,73 @@ extern size_t varsize_any(void *p);
815733
externHeapTupleheap_expand_tuple(HeapTuplesourceTuple,TupleDesctupleDesc);
816734
externMinimalTupleminimal_expand_tuple(HeapTuplesourceTuple,TupleDesctupleDesc);
817735

736+
/*
737+
*fastgetattr
738+
*Fetch a user attribute's value as a Datum (might be either a
739+
*value, or a pointer into the data area of the tuple).
740+
*
741+
*This must not be used when a system attribute might be requested.
742+
*Furthermore, the passed attnum MUST be valid. Use heap_getattr()
743+
*instead, if in doubt.
744+
*
745+
*This gets called many times, so we macro the cacheable and NULL
746+
*lookups, and call nocachegetattr() for the rest.
747+
*/
748+
staticinlineDatum
749+
fastgetattr(HeapTupletup,intattnum,TupleDesctupleDesc,bool*isnull)
750+
{
751+
AssertMacro(attnum>0);
752+
753+
*isnull= false;
754+
if (HeapTupleNoNulls(tup))
755+
{
756+
Form_pg_attributeatt;
757+
758+
att=TupleDescAttr(tupleDesc,attnum-1);
759+
if (att->attcacheoff >=0)
760+
returnfetchatt(att, (char*)tup->t_data+tup->t_data->t_hoff+
761+
att->attcacheoff);
762+
else
763+
returnnocachegetattr(tup,attnum,tupleDesc);
764+
}
765+
else
766+
{
767+
if (att_isnull(attnum-1,tup->t_data->t_bits))
768+
{
769+
*isnull= true;
770+
return (Datum)NULL;
771+
}
772+
else
773+
returnnocachegetattr(tup,attnum,tupleDesc);
774+
}
775+
}
776+
777+
/*
778+
*heap_getattr
779+
*Extract an attribute of a heap tuple and return it as a Datum.
780+
*This works for either system or user attributes. The given attnum
781+
*is properly range-checked.
782+
*
783+
*If the field in question has a NULL value, we return a zero Datum
784+
*and set *isnull == true. Otherwise, we set *isnull == false.
785+
*
786+
*<tup> is the pointer to the heap tuple. <attnum> is the attribute
787+
*number of the column (field) caller wants. <tupleDesc> is a
788+
*pointer to the structure describing the row and all its fields.
789+
*
790+
*/
791+
staticinlineDatum
792+
heap_getattr(HeapTupletup,intattnum,TupleDesctupleDesc,bool*isnull)
793+
{
794+
if (attnum>0)
795+
{
796+
if (attnum> (int)HeapTupleHeaderGetNatts(tup->t_data))
797+
returngetmissingattr(tupleDesc,attnum,isnull);
798+
else
799+
returnfastgetattr(tup,attnum,tupleDesc,isnull);
800+
}
801+
else
802+
returnheap_getsysattr(tup,attnum,tupleDesc,isnull);
803+
}
804+
818805
#endif/* HTUP_DETAILS_H */

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