Clean up possibly-uninitialized-variable warnings reported by gcc 4.x.

17 files changed, 151 insertions, 110 deletions

diff --git a/src/backend/access/nbtree/nbtinsert.c b/src/backend/access/nbtree/nbtinsert.c
index 7f9a215b25..1f6b829c8b 100644
--- a/src/backend/access/nbtree/nbtinsert.c
+++ b/src/backend/access/nbtree/nbtinsert.c
@@ -49,8 +49,7 @@ static void _bt_insertonpg(Relation rel, Buffer buf,
 			   bool split_only_page);
 static Buffer _bt_split(Relation rel, Buffer buf, OffsetNumber firstright,
 		  OffsetNumber newitemoff, Size newitemsz,
-		  BTItem newitem, bool newitemonleft,
-		  OffsetNumber *itup_off, BlockNumber *itup_blkno);
+		  BTItem newitem, bool newitemonleft);
 static OffsetNumber _bt_findsplitloc(Relation rel, Page page,
 				 OffsetNumber newitemoff,
 				 Size newitemsz,
@@ -365,8 +364,6 @@ _bt_insertonpg(Relation rel,
 {
 	Page		page;
 	BTPageOpaque lpageop;
-	OffsetNumber itup_off;
-	BlockNumber itup_blkno;
 	OffsetNumber newitemoff;
 	OffsetNumber firstright = InvalidOffsetNumber;
 	Size		itemsz;
@@ -490,8 +487,7 @@ _bt_insertonpg(Relation rel,
 
 		/* split the buffer into left and right halves */
 		rbuf = _bt_split(rel, buf, firstright,
-						 newitemoff, itemsz, btitem, newitemonleft,
-						 &itup_off, &itup_blkno);
+						 newitemoff, itemsz, btitem, newitemonleft);
 
 		/*----------
 		 * By here,
@@ -516,6 +512,8 @@ _bt_insertonpg(Relation rel,
 		Buffer		metabuf = InvalidBuffer;
 		Page		metapg = NULL;
 		BTMetaPageData *metad = NULL;
+		OffsetNumber itup_off;
+		BlockNumber itup_blkno;
 
 		itup_off = newitemoff;
 		itup_blkno = BufferGetBlockNumber(buf);
@@ -640,14 +638,12 @@ _bt_insertonpg(Relation rel,
  *		must be inserted along with the data from the old page.
  *
  *		Returns the new right sibling of buf, pinned and write-locked.
- *		The pin and lock on buf are maintained.  *itup_off and *itup_blkno
- *		are set to the exact location where newitem was inserted.
+ *		The pin and lock on buf are maintained.
  */
 static Buffer
 _bt_split(Relation rel, Buffer buf, OffsetNumber firstright,
 		  OffsetNumber newitemoff, Size newitemsz, BTItem newitem,
-		  bool newitemonleft,
-		  OffsetNumber *itup_off, BlockNumber *itup_blkno)
+		  bool newitemonleft)
 {
 	Buffer		rbuf;
 	Page		origpage;
@@ -659,6 +655,8 @@ _bt_split(Relation rel, Buffer buf, OffsetNumber firstright,
 	Buffer		sbuf = InvalidBuffer;
 	Page		spage = NULL;
 	BTPageOpaque sopaque = NULL;
+	OffsetNumber itup_off = 0;
+	BlockNumber itup_blkno = 0;
 	Size		itemsz;
 	ItemId		itemid;
 	BTItem		item;
@@ -752,16 +750,16 @@ _bt_split(Relation rel, Buffer buf, OffsetNumber firstright,
 			{
 				_bt_pgaddtup(rel, leftpage, newitemsz, newitem, leftoff,
 							 "left sibling");
-				*itup_off = leftoff;
-				*itup_blkno = BufferGetBlockNumber(buf);
+				itup_off = leftoff;
+				itup_blkno = BufferGetBlockNumber(buf);
 				leftoff = OffsetNumberNext(leftoff);
 			}
 			else
 			{
 				_bt_pgaddtup(rel, rightpage, newitemsz, newitem, rightoff,
 							 "right sibling");
-				*itup_off = rightoff;
-				*itup_blkno = BufferGetBlockNumber(rbuf);
+				itup_off = rightoff;
+				itup_blkno = BufferGetBlockNumber(rbuf);
 				rightoff = OffsetNumberNext(rightoff);
 			}
 		}
@@ -788,16 +786,16 @@ _bt_split(Relation rel, Buffer buf, OffsetNumber firstright,
 		{
 			_bt_pgaddtup(rel, leftpage, newitemsz, newitem, leftoff,
 						 "left sibling");
-			*itup_off = leftoff;
-			*itup_blkno = BufferGetBlockNumber(buf);
+			itup_off = leftoff;
+			itup_blkno = BufferGetBlockNumber(buf);
 			leftoff = OffsetNumberNext(leftoff);
 		}
 		else
 		{
 			_bt_pgaddtup(rel, rightpage, newitemsz, newitem, rightoff,
 						 "right sibling");
-			*itup_off = rightoff;
-			*itup_blkno = BufferGetBlockNumber(rbuf);
+			itup_off = rightoff;
+			itup_blkno = BufferGetBlockNumber(rbuf);
 			rightoff = OffsetNumberNext(rightoff);
 		}
 	}
@@ -839,7 +837,7 @@ _bt_split(Relation rel, Buffer buf, OffsetNumber firstright,
 		XLogRecData rdata[4];
 
 		xlrec.target.node = rel->rd_node;
-		ItemPointerSet(&(xlrec.target.tid), *itup_blkno, *itup_off);
+		ItemPointerSet(&(xlrec.target.tid), itup_blkno, itup_off);
 		if (newitemonleft)
 			xlrec.otherblk = BufferGetBlockNumber(rbuf);
 		else
diff --git a/src/backend/catalog/pg_proc.c b/src/backend/catalog/pg_proc.c
index 0d815a311a..8d91a0fd12 100644
--- a/src/backend/catalog/pg_proc.c
+++ b/src/backend/catalog/pg_proc.c
@@ -789,21 +789,27 @@ match_prosrc_to_literal(const char *prosrc, const char *literal,
 		else if (*literal == '\'')
 		{
 			if (literal[1] != '\'')
-				return false;
+				goto fail;
 			literal++;
 			if (cursorpos > 0)
 				newcp++;
 		}
 		chlen = pg_mblen(prosrc);
 		if (strncmp(prosrc, literal, chlen) != 0)
-			return false;
+			goto fail;
 		prosrc += chlen;
 		literal += chlen;
 	}
 
-	*newcursorpos = newcp;
-
 	if (*literal == '\'' && literal[1] != '\'')
+	{
+		/* success */
+		*newcursorpos = newcp;
 		return true;
+	}
+
+fail:
+	/* Must set *newcursorpos to suppress compiler warning */
+	*newcursorpos = newcp;
 	return false;
 }
diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c
index 2b13464353..3ed2898e0f 100644
--- a/src/backend/commands/copy.c
+++ b/src/backend/commands/copy.c
@@ -542,7 +542,10 @@ CopyGetInt32(CopyState cstate, int32 *val)
 	uint32		buf;
 
 	if (CopyGetData(cstate, &buf, sizeof(buf), sizeof(buf)) != sizeof(buf))
+	{
+		*val = 0;				/* suppress compiler warning */
 		return false;
+	}
 	*val = (int32) ntohl(buf);
 	return true;
 }
@@ -568,7 +571,10 @@ CopyGetInt16(CopyState cstate, int16 *val)
 	uint16		buf;
 
 	if (CopyGetData(cstate, &buf, sizeof(buf), sizeof(buf)) != sizeof(buf))
+	{
+		*val = 0;				/* suppress compiler warning */
 		return false;
+	}
 	*val = (int16) ntohs(buf);
 	return true;
 }
diff --git a/src/backend/commands/functioncmds.c b/src/backend/commands/functioncmds.c
index 1cffc9a417..957faf9686 100644
--- a/src/backend/commands/functioncmds.c
+++ b/src/backend/commands/functioncmds.c
@@ -158,6 +158,8 @@ examine_parameter_list(List *parameters, Oid languageOid,
 	ListCell   *x;
 	int			i;
 
+	*requiredResultType = InvalidOid;		/* default result */
+
 	inTypes = (Oid *) palloc(parameterCount * sizeof(Oid));
 	allTypes = (Datum *) palloc(parameterCount * sizeof(Datum));
 	paramModes = (Datum *) palloc(parameterCount * sizeof(Datum));
@@ -243,7 +245,6 @@ examine_parameter_list(List *parameters, Oid languageOid,
 	{
 		*allParameterTypes = NULL;
 		*parameterModes = NULL;
-		*requiredResultType = InvalidOid;
 	}
 
 	if (have_names)
@@ -383,16 +384,22 @@ compute_attributes_sql_style(List *options,
 	if (as_item)
 		*as = (List *) as_item->arg;
 	else
+	{
 		ereport(ERROR,
 				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
 				 errmsg("no function body specified")));
+		*as = NIL;				/* keep compiler quiet */
+	}
 
 	if (language_item)
 		*language = strVal(language_item->arg);
 	else
+	{
 		ereport(ERROR,
 				(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
 				 errmsg("no language specified")));
+		*language = NULL;		/* keep compiler quiet */
+	}
 
 	/* process optional items */
 	if (volatility_item)
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 469240ad55..00f61d2976 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -4109,6 +4109,8 @@ transformFkeyGetPrimaryKey(Relation pkrel, Oid *indexOid,
 	 * look up each one in the pg_index syscache until we find one marked
 	 * primary key (hopefully there isn't more than one such).
 	 */
+	*indexOid = InvalidOid;
+
 	indexoidlist = RelationGetIndexList(pkrel);
 
 	foreach(indexoidscan, indexoidlist)
@@ -4127,7 +4129,6 @@ transformFkeyGetPrimaryKey(Relation pkrel, Oid *indexOid,
 			break;
 		}
 		ReleaseSysCache(indexTuple);
-		indexStruct = NULL;
 	}
 
 	list_free(indexoidlist);
@@ -4135,7 +4136,7 @@ transformFkeyGetPrimaryKey(Relation pkrel, Oid *indexOid,
 	/*
 	 * Check that we found it
 	 */
-	if (indexStruct == NULL)
+	if (!OidIsValid(*indexOid))
 		ereport(ERROR,
 				(errcode(ERRCODE_UNDEFINED_OBJECT),
 			errmsg("there is no primary key for referenced table \"%s\"",
diff --git a/src/backend/optimizer/path/indxpath.c b/src/backend/optimizer/path/indxpath.c
index 65eff98d0a..a7ba648bf2 100644
--- a/src/backend/optimizer/path/indxpath.c
+++ b/src/backend/optimizer/path/indxpath.c
@@ -65,10 +65,9 @@ static bool matches_any_index(RestrictInfo *rinfo, RelOptInfo *rel,
 							  Relids outer_relids);
 static List *find_clauses_for_join(PlannerInfo *root, RelOptInfo *rel,
 								   Relids outer_relids, bool isouterjoin);
-static bool match_variant_ordering(PlannerInfo *root,
-								   IndexOptInfo *index,
-								   List *restrictclauses,
-								   ScanDirection *indexscandir);
+static ScanDirection match_variant_ordering(PlannerInfo *root,
+											IndexOptInfo *index,
+											List *restrictclauses);
 static List *identify_ignorable_ordering_cols(PlannerInfo *root,
 											  IndexOptInfo *index,
 											  List *restrictclauses);
@@ -362,15 +361,15 @@ find_usable_indexes(PlannerInfo *root, RelOptInfo *rel,
 			root->query_pathkeys != NIL &&
 			pathkeys_useful_for_ordering(root, useful_pathkeys) == 0)
 		{
-			ScanDirection	indexscandir;
+			ScanDirection	scandir;
 
-			if (match_variant_ordering(root, index, restrictclauses,
-									   &indexscandir))
+			scandir = match_variant_ordering(root, index, restrictclauses);
+			if (!ScanDirectionIsNoMovement(scandir))
 			{
 				ipath = create_index_path(root, index,
 										  restrictclauses,
 										  root->query_pathkeys,
-										  indexscandir,
+										  scandir,
 										  false);
 				result = lappend(result, ipath);
 			}
@@ -1304,15 +1303,14 @@ find_clauses_for_join(PlannerInfo *root, RelOptInfo *rel,
  * 'restrictclauses' is the list of sublists of restriction clauses
  *		matching the columns of the index (NIL if none)
  *
- * Returns TRUE if able to match the requested query pathkeys, FALSE if not.
- * In the TRUE case, sets '*indexscandir' to either ForwardScanDirection or
- * BackwardScanDirection to indicate the proper scan direction.
+ * If able to match the requested query pathkeys, returns either
+ * ForwardScanDirection or BackwardScanDirection to indicate the proper index
+ * scan direction.  If no match, returns NoMovementScanDirection.
  */
-static bool
+static ScanDirection
 match_variant_ordering(PlannerInfo *root,
 					   IndexOptInfo *index,
-					   List *restrictclauses,
-					   ScanDirection *indexscandir)
+					   List *restrictclauses)
 {
 	List	   *ignorables;
 
@@ -1328,7 +1326,7 @@ match_variant_ordering(PlannerInfo *root,
 	 * won't cope.
 	 */
 	if (index->relam != BTREE_AM_OID)
-		return false;
+		return NoMovementScanDirection;
 	/*
 	 * Figure out which index columns can be optionally ignored because
 	 * they have an equality constraint.  This is the same set for either
@@ -1344,17 +1342,13 @@ match_variant_ordering(PlannerInfo *root,
 	if (ignorables &&
 		match_index_to_query_keys(root, index, ForwardScanDirection,
 								  ignorables))
-	{
-		*indexscandir = ForwardScanDirection;
-		return true;
-	}
+		return ForwardScanDirection;
+
 	if (match_index_to_query_keys(root, index, BackwardScanDirection,
 								  ignorables))
-	{
-		*indexscandir = BackwardScanDirection;
-		return true;
-	}
-	return false;
+		return BackwardScanDirection;
+
+	return NoMovementScanDirection;
 }
 
 /*
diff --git a/src/backend/optimizer/plan/createplan.c b/src/backend/optimizer/plan/createplan.c
index 5f3300b157..2ec87ec5e9 100644
--- a/src/backend/optimizer/plan/createplan.c
+++ b/src/backend/optimizer/plan/createplan.c
@@ -1634,7 +1634,8 @@ fix_indexqual_operand(Node *node, IndexOptInfo *index, Oid *opclass)
 
 	/* Ooops... */
 	elog(ERROR, "node is not an index attribute");
-	return NULL;				/* keep compiler quiet */
+	*opclass = InvalidOid;		/* keep compiler quiet */
+	return NULL;
 }
 
 /*
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c
index f9d7721ed9..ffb7658c23 100644
--- a/src/backend/optimizer/plan/planner.c
+++ b/src/backend/optimizer/plan/planner.c
@@ -649,8 +649,8 @@ grouping_planner(PlannerInfo *root, double tuple_fraction)
 {
 	Query	   *parse = root->parse;
 	List	   *tlist = parse->targetList;
-	int			offset_est;
-	int			count_est;
+	int			offset_est = 0;
+	int			count_est = 0;
 	Plan	   *result_plan;
 	List	   *current_pathkeys;
 	List	   *sort_pathkeys;
diff --git a/src/backend/regex/rege_dfa.c b/src/backend/regex/rege_dfa.c
index bfab113f27..281111c540 100644
--- a/src/backend/regex/rege_dfa.c
+++ b/src/backend/regex/rege_dfa.c
@@ -578,7 +578,6 @@ getvacant(struct vars * v,		/* used only for debug flags */
 	struct sset *ss;
 	struct sset *p;
 	struct arcp ap;
-	struct arcp lastap;
 	color		co;
 
 	ss = pickss(v, d, cp, start);
@@ -608,6 +607,8 @@ getvacant(struct vars * v,		/* used only for debug flags */
 			p->ins = ss->inchain[i];
 		else
 		{
+			struct arcp lastap = {NULL, 0};
+
 			assert(p->ins.ss != NULL);
 			for (ap = p->ins; ap.ss != NULL &&
 				 !(ap.ss == ss && ap.co == i);
diff --git a/src/backend/regex/regexec.c b/src/backend/regex/regexec.c
index eb5807545e..b76fde42e4 100644
--- a/src/backend/regex/regexec.c
+++ b/src/backend/regex/regexec.c
@@ -464,6 +464,7 @@ cfindloop(struct vars * v,
 				if (er != REG_NOMATCH)
 				{
 					ERR(er);
+					*coldp = cold;
 					return er;
 				}
 				if ((shorter) ? end == estop : end == begin)
diff --git a/src/backend/utils/adt/inet_net_ntop.c b/src/backend/utils/adt/inet_net_ntop.c
index 5fe0b24bcc..3d3c068865 100644
--- a/src/backend/utils/adt/inet_net_ntop.c
+++ b/src/backend/utils/adt/inet_net_ntop.c
@@ -443,6 +443,8 @@ inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
 		words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
 	best.base = -1;
 	cur.base = -1;
+	best.len = 0;
+	cur.len = 0;
 	for (i = 0; i < (NS_IN6ADDRSZ / NS_INT16SZ); i++)
 	{
 		if (words[i] == 0)
diff --git a/src/backend/utils/adt/nabstime.c b/src/backend/utils/adt/nabstime.c
index d50316e1db..7050083a52 100644
--- a/src/backend/utils/adt/nabstime.c
+++ b/src/backend/utils/adt/nabstime.c
@@ -79,9 +79,9 @@
 
 static AbsoluteTime tm2abstime(struct pg_tm *tm, int tz);
 static void reltime2tm(RelativeTime time, struct pg_tm *tm);
-static int istinterval(char *i_string,
-			AbsoluteTime *i_start,
-			AbsoluteTime *i_end);
+static void parsetinterval(char *i_string,
+						   AbsoluteTime *i_start,
+						   AbsoluteTime *i_end);
 
 
 /*
@@ -727,24 +727,19 @@ tintervalin(PG_FUNCTION_ARGS)
 				t1,
 				t2;
 
-	tinterval = (TimeInterval) palloc(sizeof(TimeIntervalData));
+	parsetinterval(tintervalstr, &t1, &t2);
 
-	if (istinterval(tintervalstr, &t1, &t2) == 0)
-		ereport(ERROR,
-				(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
-				 errmsg("invalid input syntax for type tinterval: \"%s\"",
-						tintervalstr)));
+	tinterval = (TimeInterval) palloc(sizeof(TimeIntervalData));
 
 	if (t1 == INVALID_ABSTIME || t2 == INVALID_ABSTIME)
-		tinterval  ->status = T_INTERVAL_INVAL;	/* undefined  */
-
+		tinterval->status = T_INTERVAL_INVAL;	/* undefined  */
 	else
-		tinterval  ->status = T_INTERVAL_VALID;
+		tinterval->status = T_INTERVAL_VALID;
 
 	i_start = ABSTIMEMIN(t1, t2);
 	i_end = ABSTIMEMAX(t1, t2);
-	tinterval  ->data[0] = i_start;
-	tinterval  ->data[1] = i_end;
+	tinterval->data[0] = i_start;
+	tinterval->data[1] = i_end;
 
 	PG_RETURN_TIMEINTERVAL(tinterval);
 }
@@ -1444,11 +1439,9 @@ tintervalend(PG_FUNCTION_ARGS)
  *****************************************************************************/
 
 /*
- *		istinterval		- returns 1, iff i_string is a valid tinterval descr.
- *								  0, iff i_string is NOT a valid tinterval desc.
- *								  2, iff any time is INVALID_ABSTIME
+ *		parsetinterval -- parse a tinterval string
  *
- *		output parameter:
+ *		output parameters:
  *				i_start, i_end: tinterval margins
  *
  *		Time interval:
@@ -1460,10 +1453,10 @@ tintervalend(PG_FUNCTION_ARGS)
  *
  *		e.g.  [  '  Jan 18 1902'   'Jan 1 00:00:00 1970']
  */
-static int
-istinterval(char *i_string,
-			AbsoluteTime *i_start,
-			AbsoluteTime *i_end)
+static void
+parsetinterval(char *i_string,
+			   AbsoluteTime *i_start,
+			   AbsoluteTime *i_end)
 {
 	char	   *p,
 			   *p1;
@@ -1476,10 +1469,12 @@ istinterval(char *i_string,
 		if (IsSpace(c))
 			p++;
 		else if (c != '[')
-			return 0;			/* syntax error */
+			goto bogus;			/* syntax error */
 		else
 			break;
 	}
+	if (c == '\0')
+		goto bogus;				/* syntax error */
 	p++;
 	/* skip leading blanks up to '"' */
 	while ((c = *p) != '\0')
@@ -1487,30 +1482,32 @@ istinterval(char *i_string,
 		if (IsSpace(c))
 			p++;
 		else if (c != '"')
-			return 0;			/* syntax error */
+			goto bogus;			/* syntax error */
 		else
 			break;
 	}
+	if (c == '\0')
+		goto bogus;				/* syntax error */
 	p++;
 	if (strncmp(INVALID_INTERVAL_STR, p, strlen(INVALID_INTERVAL_STR)) == 0)
-		return 0;				/* undefined range, handled like a syntax
+		goto bogus;				/* undefined range, handled like a syntax
 								 * err. */
-	/* search for the end of the first date and change it to a NULL */
+	/* search for the end of the first date and change it to a \0 */
 	p1 = p;
 	while ((c = *p1) != '\0')
 	{
 		if (c == '"')
-		{
-			*p1 = '\0';
 			break;
-		}
 		p1++;
 	}
+	if (c == '\0')
+		goto bogus;				/* syntax error */
+	*p1 = '\0';
 	/* get the first date */
 	*i_start = DatumGetAbsoluteTime(DirectFunctionCall1(abstimein,
 													CStringGetDatum(p)));
-	/* rechange NULL at the end of the first date to a '"' */
-	*p1 = '"';
+	/* undo change to \0 */
+	*p1 = c;
 	p = ++p1;
 	/* skip blanks up to '"', beginning of second date */
 	while ((c = *p) != '\0')
@@ -1518,27 +1515,29 @@ istinterval(char *i_string,
 		if (IsSpace(c))
 			p++;
 		else if (c != '"')
-			return 0;			/* syntax error */
+			goto bogus;			/* syntax error */
 		else
 			break;
 	}
+	if (c == '\0')
+		goto bogus;				/* syntax error */
 	p++;
-	/* search for the end of the second date and change it to a NULL */
+	/* search for the end of the second date and change it to a \0 */
 	p1 = p;
 	while ((c = *p1) != '\0')
 	{
 		if (c == '"')
-		{
-			*p1 = '\0';
 			break;
-		}
 		p1++;
 	}
+	if (c == '\0')
+		goto bogus;				/* syntax error */
+	*p1 = '\0';
 	/* get the second date */
 	*i_end = DatumGetAbsoluteTime(DirectFunctionCall1(abstimein,
 													CStringGetDatum(p)));
-	/* rechange NULL at the end of the first date to a '"' */
-	*p1 = '"';
+	/* undo change to \0 */
+	*p1 = c;
 	p = ++p1;
 	/* skip blanks up to ']' */
 	while ((c = *p) != '\0')
@@ -1546,16 +1545,26 @@ istinterval(char *i_string,
 		if (IsSpace(c))
 			p++;
 		else if (c != ']')
-			return 0;			/* syntax error */
+			goto bogus;			/* syntax error */
 		else
 			break;
 	}
+	if (c == '\0')
+		goto bogus;				/* syntax error */
 	p++;
 	c = *p;
 	if (c != '\0')
-		return 0;				/* syntax error */
+		goto bogus;				/* syntax error */
+
 	/* it seems to be a valid tinterval */
-	return 1;
+	return;
+
+bogus:
+	ereport(ERROR,
+			(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
+			 errmsg("invalid input syntax for type tinterval: \"%s\"",
+					i_string)));
+	*i_start = *i_end = INVALID_ABSTIME; /* keep compiler quiet */
 }
 
 
diff --git a/src/backend/utils/adt/selfuncs.c b/src/backend/utils/adt/selfuncs.c
index 40d7eb16bf..391f91d66c 100644
--- a/src/backend/utils/adt/selfuncs.c
+++ b/src/backend/utils/adt/selfuncs.c
@@ -2403,6 +2403,7 @@ convert_to_scalar(Datum value, Oid valuetypid, double *scaledvalue,
 			return true;
 	}
 	/* Don't know how to convert */
+	*scaledvalue = *scaledlobound = *scaledhibound = 0;
 	return false;
 }
 
diff --git a/src/backend/utils/cache/catcache.c b/src/backend/utils/cache/catcache.c
index 4339a44b16..6832a452d7 100644
--- a/src/backend/utils/cache/catcache.c
+++ b/src/backend/utils/cache/catcache.c
@@ -161,6 +161,8 @@ GetCCHashEqFuncs(Oid keytype, PGFunction *hashfunc, RegProcedure *eqfunc)
 			break;
 		default:
 			elog(FATAL, "type %u not supported as catcache key", keytype);
+			*hashfunc = NULL;	/* keep compiler quiet */
+			*eqfunc = InvalidOid;
 			break;
 	}
 }
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index ed1d17e5be..9d3d7a200c 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -3401,7 +3401,11 @@ parse_bool(const char *value, bool *result)
 	}
 
 	else
+	{
+		if (result)
+			*result = false;	/* suppress compiler warning */
 		return false;
+	}
 	return true;
 }
 
@@ -3427,7 +3431,11 @@ parse_int(const char *value, int *result)
 		|| val != (long) ((int32) val)
 #endif
 		)
+	{
+		if (result)
+			*result = 0;		/* suppress compiler warning */
 		return false;
+	}
 	if (result)
 		*result = (int) val;
 	return true;
@@ -3449,7 +3457,11 @@ parse_real(const char *value, double *result)
 	errno = 0;
 	val = strtod(value, &endptr);
 	if (endptr == value || *endptr != '\0' || errno == ERANGE)
+	{
+		if (result)
+			*result = 0;		/* suppress compiler warning */
 		return false;
+	}
 	if (result)
 		*result = val;
 	return true;
diff --git a/src/interfaces/ecpg/pgtypeslib/datetime.c b/src/interfaces/ecpg/pgtypeslib/datetime.c
index 0a480b658a..1d8a85d7a8 100644
--- a/src/interfaces/ecpg/pgtypeslib/datetime.c
+++ b/src/interfaces/ecpg/pgtypeslib/datetime.c
@@ -334,6 +334,8 @@ PGTYPESdate_defmt_asc(date *d, char *fmt, char *str)
 	char	   *str_copy;
 	struct tm	tm;
 
+	tm.tm_year = tm.tm_mon = tm.tm_mday = 0; /* keep compiler quiet */
+
 	if (!d || !str || !fmt)
 	{
 		errno = PGTYPES_DATE_ERR_EARGS;
diff --git a/src/pl/plpgsql/src/pl_comp.c b/src/pl/plpgsql/src/pl_comp.c
index 3a18b8da5d..ac9eeea525 100644
--- a/src/pl/plpgsql/src/pl_comp.c
+++ b/src/pl/plpgsql/src/pl_comp.c
@@ -1395,24 +1395,22 @@ plpgsql_parse_tripwordtype(char *word)
 	for (i = 0; i < qualified_att_len; i++)
 	{
 		if (word[i] == '.' && ++numdots == 2)
-		{
-			cp[0] = (char *) palloc((i + 1) * sizeof(char));
-			memset(cp[0], 0, (i + 1) * sizeof(char));
-			memcpy(cp[0], word, i * sizeof(char));
-
-			/*
-			 * qualified_att_len - one based position + 1 (null
-			 * terminator)
-			 */
-			cp[1] = (char *) palloc((qualified_att_len - i) * sizeof(char));
-			memset(cp[1], 0, (qualified_att_len - i) * sizeof(char));
-			memcpy(cp[1], &word[i + 1], (qualified_att_len - i - 1) * sizeof(char));
-
 			break;
-		}
 	}
 
-	relvar = makeRangeVarFromNameList(stringToQualifiedNameList(cp[0], "plpgsql_parse_tripwordtype"));
+	cp[0] = (char *) palloc((i + 1) * sizeof(char));
+	memcpy(cp[0], word, i * sizeof(char));
+	cp[0][i] = '\0';
+
+	/*
+	 * qualified_att_len - one based position + 1 (null terminator)
+	 */
+	cp[1] = (char *) palloc((qualified_att_len - i) * sizeof(char));
+	memcpy(cp[1], &word[i + 1], (qualified_att_len - i - 1) * sizeof(char));
+	cp[1][qualified_att_len - i - 1] = '\0';
+
+	relvar = makeRangeVarFromNameList(stringToQualifiedNameList(cp[0],
+												"plpgsql_parse_tripwordtype"));
 	classOid = RangeVarGetRelid(relvar, true);
 	if (!OidIsValid(classOid))
 		goto done;