Silence compiler warnings from some older compilers.

Since a117cebd6, some older gcc versions issue "variable may be used
uninitialized in this function" complaints for brin_summarize_range.
Silence that using the same coding pattern as in bt_index_check_internal;
arguably, a117cebd6 had too narrow a view of which compilers might give
trouble.

Nathan Bossart and Tom Lane.  Back-patch as the previous commit was.

Discussion: https://postgr.es/m/20220601163537.GA2331988@nathanxps13

diff --git a/contrib/amcheck/verify_nbtree.c b/contrib/amcheck/verify_nbtree.c
index a8791000f871ef35f72b2546960dc611771fe4ca..2beeebb1635313794c8726519f796d2dc3bc79b2 100644 (file)
--- a/contrib/amcheck/verify_nbtree.c
+++ b/contrib/amcheck/verify_nbtree.c
@@ -284,7 +284,7 @@ bt_index_check_internal(Oid indrelid, bool parentcheck, bool heapallindexed,
        else
        {
                heaprel = NULL;
-               /* for "gcc -Og" https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78394 */
+               /* Set these just to suppress "uninitialized variable" warnings */
                save_userid = InvalidOid;
                save_sec_context = -1;
                save_nestlevel = -1;

diff --git a/src/backend/access/brin/brin.c b/src/backend/access/brin/brin.c
index 52f171772dc6d6f9d082df54243f764eacc6a18e..0de1441dc6d8dcaab984bdbe49796eb9bba15734 100644 (file)
--- a/src/backend/access/brin/brin.c
+++ b/src/backend/access/brin/brin.c
@@ -1051,7 +1051,13 @@ brin_summarize_range(PG_FUNCTION_ARGS)
                save_nestlevel = NewGUCNestLevel();
        }
        else
+       {
                heapRel = NULL;
+               /* Set these just to suppress "uninitialized variable" warnings */
+               save_userid = InvalidOid;
+               save_sec_context = -1;
+               save_nestlevel = -1;
+       }
 
        indexRel = index_open(indexoid, ShareUpdateExclusiveLock);