vacuumlazy.c: Tweak local variable name.

Make a local variable name consistent with the name from its WAL record.

Extracted from a larger patch to deal with issues with how vacuumlazy.c
sets pages all-frozen.

Author: Peter Geoghegan <pg@bowt.ie>
Discussion: https://postgr.es/m/CAH2-WznuNGSzF8v6OsgjaC5aYsb3cZ6HW6MLm30X0d65cmSH6A@mail.gmail.com

diff --git a/src/backend/access/heap/vacuumlazy.c b/src/backend/access/heap/vacuumlazy.c
index a42e881da34c6374ee953eb3b01671febc6edfd4..731e77676c0cdafcc2307de2b6f6e61a7c36327e 100644 (file)
--- a/src/backend/access/heap/vacuumlazy.c
+++ b/src/backend/access/heap/vacuumlazy.c
@@ -2478,7 +2478,7 @@ lazy_vacuum_heap_page(LVRelState *vacrel, BlockNumber blkno, Buffer buffer,
        VacDeadItems *dead_items = vacrel->dead_items;
        Page            page = BufferGetPage(buffer);
        OffsetNumber unused[MaxHeapTuplesPerPage];
-       int                     uncnt = 0;
+       int                     nunused = 0;
        TransactionId visibility_cutoff_xid;
        bool            all_frozen;
        LVSavedErrInfo saved_err_info;
@@ -2508,10 +2508,10 @@ lazy_vacuum_heap_page(LVRelState *vacrel, BlockNumber blkno, Buffer buffer,
 
                Assert(ItemIdIsDead(itemid) && !ItemIdHasStorage(itemid));
                ItemIdSetUnused(itemid);
-               unused[uncnt++] = toff;
+               unused[nunused++] = toff;
        }
 
-       Assert(uncnt > 0);
+       Assert(nunused > 0);
 
        /* Attempt to truncate line pointer array now */
        PageTruncateLinePointerArray(page);
@@ -2527,13 +2527,13 @@ lazy_vacuum_heap_page(LVRelState *vacrel, BlockNumber blkno, Buffer buffer,
                xl_heap_vacuum xlrec;
                XLogRecPtr      recptr;
 
-               xlrec.nunused = uncnt;
+               xlrec.nunused = nunused;
 
                XLogBeginInsert();
                XLogRegisterData((char *) &xlrec, SizeOfHeapVacuum);
 
                XLogRegisterBuffer(0, buffer, REGBUF_STANDARD);
-               XLogRegisterBufData(0, (char *) unused, uncnt * sizeof(OffsetNumber));
+               XLogRegisterBufData(0, (char *) unused, nunused * sizeof(OffsetNumber));
 
                recptr = XLogInsert(RM_HEAP2_ID, XLOG_HEAP2_VACUUM);