In builds without --enable-cassert (I guess not many developers use
those a lot), there are quite a few unused variable warnings. These
usually hold some intermediate result that the assert checks later. I
see that in some places our code already uses #ifdef
USE_ASSERT_CHECKING, presumably to hide similar issues. But in most
cases using this would significantly butcher the code. I found that
adding __attribute__((unused)) is cleaner. Attached is a patch that
cleans up all the warnings I encountered.
diff --git i/src/backend/access/hash/hashovfl.c w/src/backend/access/hash/hashovfl.c
index 130c296..d4329fb 100644
--- i/src/backend/access/hash/hashovfl.c
+++ w/src/backend/access/hash/hashovfl.c
@@ -391,7 +391,9 @@ _hash_freeovflpage(Relation rel, Buffer ovflbuf,
uint32 ovflbitno;
int32 bitmappage,
bitmapbit;
+#ifdef USE_ASSERT_CHECKING
Bucket bucket;
+#endif
/* Get information from the doomed page */
_hash_checkpage(rel, ovflbuf, LH_OVERFLOW_PAGE);
@@ -400,7 +402,9 @@ _hash_freeovflpage(Relation rel, Buffer ovflbuf,
ovflopaque = (HashPageOpaque) PageGetSpecialPointer(ovflpage);
nextblkno = ovflopaque->hasho_nextblkno;
prevblkno = ovflopaque->hasho_prevblkno;
+#ifdef USE_ASSERT_CHECKING
bucket = ovflopaque->hasho_bucket;
+#endif
/*
* Zero the page for debugging's sake; then write and release it. (Note:
diff --git i/src/backend/executor/execCurrent.c w/src/backend/executor/execCurrent.c
index b07161f..2a59fc6 100644
--- i/src/backend/executor/execCurrent.c
+++ w/src/backend/executor/execCurrent.c
@@ -151,7 +151,7 @@ execCurrentOf(CurrentOfExpr *cexpr,
{
ScanState *scanstate;
bool lisnull;
- Oid tuple_tableoid;
+ Oid tuple_tableoid __attribute__((unused));
ItemPointer tuple_tid;
/*
diff --git i/src/backend/executor/nodeMaterial.c w/src/backend/executor/nodeMaterial.c
index b320b54..4ab660e 100644
--- i/src/backend/executor/nodeMaterial.c
+++ w/src/backend/executor/nodeMaterial.c
@@ -66,7 +66,7 @@ ExecMaterial(MaterialState *node)
* Allocate a second read pointer to serve as the mark. We know it
* must have index 1, so needn't store that.
*/
- int ptrno;
+ int ptrno __attribute__((unused));
ptrno = tuplestore_alloc_read_pointer(tuplestorestate,
node->eflags);
diff --git i/src/backend/executor/nodeSetOp.c w/src/backend/executor/nodeSetOp.c
index 7fa5730..c6a88a8 100644
--- i/src/backend/executor/nodeSetOp.c
+++ w/src/backend/executor/nodeSetOp.c
@@ -344,7 +344,7 @@ setop_fill_hash_table(SetOpState *setopstate)
SetOp *node = (SetOp *) setopstate->ps.plan;
PlanState *outerPlan;
int firstFlag;
- bool in_first_rel;
+ bool in_first_rel __attribute__((unused));
/*
* get state info from node
diff --git i/src/backend/executor/nodeWorktablescan.c w/src/backend/executor/nodeWorktablescan.c
index e2f3dd4..e72d1cb 100644
--- i/src/backend/executor/nodeWorktablescan.c
+++ w/src/backend/executor/nodeWorktablescan.c
@@ -30,7 +30,7 @@ static TupleTableSlot *
WorkTableScanNext(WorkTableScanState *node)
{
TupleTableSlot *slot;
- EState *estate;
+ EState *estate __attribute__((unused));
Tuplestorestate *tuplestorestate;
/*
diff --git i/src/backend/libpq/be-fsstubs.c w/src/backend/libpq/be-fsstubs.c
index b864c86..1bf765c 100644
--- i/src/backend/libpq/be-fsstubs.c
+++ w/src/backend/libpq/be-fsstubs.c
@@ -378,7 +378,7 @@ lo_import_internal(text *filename, Oid lobjOid)
{
File fd;
int nbytes,
- tmp;
+ tmp __attribute__((unused));
char buf[BUFSIZE];
char fnamebuf[MAXPGPATH];
LargeObjectDesc *lobj;
diff --git i/src/backend/libpq/pqcomm.c w/src/backend/libpq/pqcomm.c
index 35812f4..df41d60 100644
--- i/src/backend/libpq/pqcomm.c
+++ w/src/backend/libpq/pqcomm.c
@@ -1373,7 +1373,7 @@ fail:
void
pq_putmessage_noblock(char msgtype, const char *s, size_t len)
{
- int res;
+ int res __attribute__((unused));
int required;
/*
diff --git i/src/backend/optimizer/path/costsize.c w/src/backend/optimizer/path/costsize.c
index e1c070e..fd16cb1 100644
--- i/src/backend/optimizer/path/costsize.c
+++ w/src/backend/optimizer/path/costsize.c
@@ -3245,7 +3245,7 @@ void
set_subquery_size_estimates(PlannerInfo *root, RelOptInfo *rel)
{
PlannerInfo *subroot = rel->subroot;
- RangeTblEntry *rte;
+ RangeTblEntry *rte __attribute__((unused));
ListCell *lc;
/* Should only be applied to base relations that are subqueries */
diff --git i/src/backend/optimizer/plan/createplan.c w/src/backend/optimizer/plan/createplan.c
index e41d2a6..7dccf7d 100644
--- i/src/backend/optimizer/plan/createplan.c
+++ w/src/backend/optimizer/plan/createplan.c
@@ -1820,7 +1820,7 @@ create_foreignscan_plan(PlannerInfo *root, ForeignPath *best_path,
ForeignScan *scan_plan;
RelOptInfo *rel = best_path->path.parent;
Index scan_relid = rel->relid;
- RangeTblEntry *rte;
+ RangeTblEntry *rte __attribute__((unused));
bool fsSystemCol;
int i;
diff --git i/src/backend/parser/analyze.c w/src/backend/parser/analyze.c
index be6e93e..d1b9d4e 100644
--- i/src/backend/parser/analyze.c
+++ w/src/backend/parser/analyze.c
@@ -1530,7 +1530,7 @@ transformSetOperationTree(ParseState *pstate, SelectStmt *stmt,
/* Process leaf SELECT */
Query *selectQuery;
char selectName[32];
- RangeTblEntry *rte;
+ RangeTblEntry *rte __attribute__((unused));
RangeTblRef *rtr;
ListCell *tl;
diff --git i/src/backend/storage/file/fd.c w/src/backend/storage/file/fd.c
index 43bc43a..5021cdc 100644
--- i/src/backend/storage/file/fd.c
+++ w/src/backend/storage/file/fd.c
@@ -684,7 +684,7 @@ LruInsert(File file)
/* seek to the right position */
if (vfdP->seekPos != (off_t) 0)
{
- off_t returnValue;
+ off_t returnValue __attribute__((unused));
returnValue = lseek(vfdP->fd, vfdP->seekPos, SEEK_SET);
Assert(returnValue != (off_t) -1);
diff --git i/src/backend/storage/lmgr/predicate.c w/src/backend/storage/lmgr/predicate.c
index 821328b..839ed9b 100644
--- i/src/backend/storage/lmgr/predicate.c
+++ w/src/backend/storage/lmgr/predicate.c
@@ -2013,7 +2013,7 @@ RestoreScratchTarget(bool lockheld)
static void
RemoveTargetIfNoLongerUsed(PREDICATELOCKTARGET *target, uint32 targettaghash)
{
- PREDICATELOCKTARGET *rmtarget;
+ PREDICATELOCKTARGET *rmtarget __attribute__((unused));
Assert(LWLockHeldByMe(SerializablePredicateLockListLock));
@@ -2074,7 +2074,7 @@ DeleteChildTargetLocks(const PREDICATELOCKTARGETTAG *newtargettag)
{
uint32 oldtargettaghash;
LWLockId partitionLock;
- PREDICATELOCK *rmpredlock;
+ PREDICATELOCK *rmpredlock __attribute__((unused));
oldtargettaghash = PredicateLockTargetTagHashCode(&oldtargettag);
partitionLock = PredicateLockHashPartitionLock(oldtargettaghash);
@@ -2227,7 +2227,7 @@ DecrementParentLocks(const PREDICATELOCKTARGETTAG *targettag)
{
uint32 targettaghash;
LOCALPREDICATELOCK *parentlock,
- *rmlock;
+ *rmlock __attribute__((unused));
parenttag = nexttag;
targettaghash = PredicateLockTargetTagHashCode(&parenttag);
diff --git i/src/backend/storage/lmgr/proc.c w/src/backend/storage/lmgr/proc.c
index dcf1928..6927fe6 100644
--- i/src/backend/storage/lmgr/proc.c
+++ w/src/backend/storage/lmgr/proc.c
@@ -807,7 +807,7 @@ static void
AuxiliaryProcKill(int code, Datum arg)
{
int proctype = DatumGetInt32(arg);
- PGPROC *auxproc;
+ PGPROC *auxproc __attribute__((unused));
Assert(proctype >= 0 && proctype < NUM_AUXILIARY_PROCS);
diff --git i/src/backend/utils/adt/selfuncs.c w/src/backend/utils/adt/selfuncs.c
index da638f8..cc11363 100644
--- i/src/backend/utils/adt/selfuncs.c
+++ w/src/backend/utils/adt/selfuncs.c
@@ -3771,7 +3771,7 @@ convert_string_datum(Datum value, Oid typid)
{
char *xfrmstr;
size_t xfrmlen;
- size_t xfrmlen2;
+ size_t xfrmlen2 __attribute__((unused));
/*
* Note: originally we guessed at a suitable output buffer size, and
@@ -6281,7 +6281,7 @@ btcostestimate(PG_FUNCTION_ARGS)
RestrictInfo *rinfo = (RestrictInfo *) lfirst(lcc);
Expr *clause;
Node *leftop,
- *rightop;
+ *rightop __attribute__((unused));
Oid clause_op;
int op_strategy;
bool is_null_op = false;
diff --git i/src/bin/psql/psqlscan.l w/src/bin/psql/psqlscan.l
index a27bcd1..0f69f54 100644
--- i/src/bin/psql/psqlscan.l
+++ w/src/bin/psql/psqlscan.l
@@ -1474,7 +1474,7 @@ psql_scan_slash_option(PsqlScanState state,
bool semicolon)
{
PQExpBufferData mybuf;
- int lexresult;
+ int lexresult __attribute__((unused));
char local_quote;
/* Must be scanning already */
--
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