Plug some trivial memory leaks in pg_dump and pg_upgrade.

There's no point in trying to free every small allocation in these
programs that are used in a one-shot fashion, but these ones seems like
an improvement on readability grounds.

Michael Paquier, per Coverity report.

Author: hlinnaka

src/bin/pg_dump/pg_dump.c

@@ -10593,6 +10593,8 @@ dumpCast(Archive *fout, DumpOptions *dopt, CastInfo *cast)
 	PQExpBuffer delqry;
 	PQExpBuffer labelq;
 	FuncInfo   *funcInfo = NULL;
+	char	   *sourceType;
+	char	   *targetType;
 
 	/* Skip if not to be dumped */
 	if (!cast->dobj.dump || dopt->dataOnly)
@@ -10616,13 +10618,13 @@ dumpCast(Archive *fout, DumpOptions *dopt, CastInfo *cast)
 	delqry = createPQExpBuffer();
 	labelq = createPQExpBuffer();
 
+	sourceType = getFormattedTypeName(fout, cast->castsource, zeroAsNone);
+	targetType = getFormattedTypeName(fout, cast->casttarget, zeroAsNone);
 	appendPQExpBuffer(delqry, "DROP CAST (%s AS %s);\n",
-					getFormattedTypeName(fout, cast->castsource, zeroAsNone),
-				   getFormattedTypeName(fout, cast->casttarget, zeroAsNone));
+					  sourceType, targetType);
 
 	appendPQExpBuffer(defqry, "CREATE CAST (%s AS %s) ",
-					getFormattedTypeName(fout, cast->castsource, zeroAsNone),
-				   getFormattedTypeName(fout, cast->casttarget, zeroAsNone));
+					  sourceType, targetType);
 
 	switch (cast->castmethod)
 	{
@@ -10660,8 +10662,7 @@ dumpCast(Archive *fout, DumpOptions *dopt, CastInfo *cast)
 	appendPQExpBufferStr(defqry, ";\n");
 
 	appendPQExpBuffer(labelq, "CAST (%s AS %s)",
-					getFormattedTypeName(fout, cast->castsource, zeroAsNone),
-				   getFormattedTypeName(fout, cast->casttarget, zeroAsNone));
+					  sourceType, targetType);
 
 	if (dopt->binary_upgrade)
 		binary_upgrade_extension_member(defqry, &cast->dobj, labelq->data);
@@ -10679,6 +10680,9 @@ dumpCast(Archive *fout, DumpOptions *dopt, CastInfo *cast)
 				NULL, "",
 				cast->dobj.catId, 0, cast->dobj.dumpId);
 
+	free(sourceType);
+	free(targetType);
+
 	destroyPQExpBuffer(defqry);
 	destroyPQExpBuffer(delqry);
 	destroyPQExpBuffer(labelq);
@@ -10696,6 +10700,7 @@ dumpTransform(Archive *fout, DumpOptions *dopt, TransformInfo *transform)
 	FuncInfo   *fromsqlFuncInfo = NULL;
 	FuncInfo   *tosqlFuncInfo = NULL;
 	char	   *lanname;
+	char	   *transformType;
 
 	/* Skip if not to be dumped */
 	if (!transform->dobj.dump || dopt->dataOnly)
@@ -10723,14 +10728,13 @@ dumpTransform(Archive *fout, DumpOptions *dopt, TransformInfo *transform)
 	labelq = createPQExpBuffer();
 
 	lanname = get_language_name(fout, transform->trflang);
+	transformType = getFormattedTypeName(fout, transform->trftype, zeroAsNone);
 
 	appendPQExpBuffer(delqry, "DROP TRANSFORM FOR %s LANGUAGE %s;\n",
-				  getFormattedTypeName(fout, transform->trftype, zeroAsNone),
-					  lanname);
+					  transformType, lanname);
 
 	appendPQExpBuffer(defqry, "CREATE TRANSFORM FOR %s LANGUAGE %s (",
-				  getFormattedTypeName(fout, transform->trftype, zeroAsNone),
-					  lanname);
+					  transformType, lanname);
 
 	if (!transform->trffromsql && !transform->trftosql)
 		write_msg(NULL, "WARNING: bogus transform definition, at least one of trffromsql and trftosql should be nonzero\n");
@@ -10777,8 +10781,7 @@ dumpTransform(Archive *fout, DumpOptions *dopt, TransformInfo *transform)
 	appendPQExpBuffer(defqry, ");\n");
 
 	appendPQExpBuffer(labelq, "TRANSFORM FOR %s LANGUAGE %s",
-				  getFormattedTypeName(fout, transform->trftype, zeroAsNone),
-					  lanname);
+					  transformType, lanname);
 
 	if (dopt->binary_upgrade)
 		binary_upgrade_extension_member(defqry, &transform->dobj, labelq->data);
@@ -10797,6 +10800,7 @@ dumpTransform(Archive *fout, DumpOptions *dopt, TransformInfo *transform)
 				transform->dobj.catId, 0, transform->dobj.dumpId);
 
 	free(lanname);
+	free(transformType);
 	destroyPQExpBuffer(defqry);
 	destroyPQExpBuffer(delqry);
 	destroyPQExpBuffer(labelq);

src/bin/pg_dump/pg_dumpall.c

@@ -1442,6 +1442,13 @@ dumpCreateDB(PGconn *conn)
 		free(fdbname);
 	}
 
+	if (default_encoding)
+		free(default_encoding);
+	if (default_collate)
+		free(default_collate);
+	if (default_ctype)
+		free(default_ctype);
+
 	PQclear(res);
 	destroyPQExpBuffer(buf);
 

src/bin/pg_upgrade/check.c

@@ -337,8 +337,14 @@ equivalent_locale(int category, const char *loca, const char *locb)
 	lenb = charb ? (charb - canonb) : strlen(canonb);
 
 	if (lena == lenb && pg_strncasecmp(canona, canonb, lena) == 0)
+	{
+		pg_free(canona);
+		pg_free(canonb);
 		return true;
+	}
 
+	pg_free(canona);
+	pg_free(canonb);
 	return false;
 }