Remove dead checks for invalid left page in ginDeletePage.

In some places, the function assumes the left page is valid, and in others,
it checks if it is valid. Remove all the checks.

diff --git a/src/backend/access/gin/ginvacuum.c b/src/backend/access/gin/ginvacuum.c
index 115f2abc9e42dc811dcbe632ccf883217c91f18b..7dcc5cae4761350bc93255bc5ad3692c28a5c51d 100644 (file)
--- a/src/backend/access/gin/ginvacuum.c
+++ b/src/backend/access/gin/ginvacuum.c
@@ -285,8 +285,7 @@ ginDeletePage(GinVacuumState *gvs, BlockNumber deleteBlkno, BlockNumber leftBlkn
    GinPageGetOpaque(page)->flags = GIN_DELETED;
 
    MarkBufferDirty(pBuffer);
-   if (leftBlkno != InvalidBlockNumber)
-       MarkBufferDirty(lBuffer);
+   MarkBufferDirty(lBuffer);
    MarkBufferDirty(dBuffer);
 
    if (RelationNeedsWAL(gvs->index))
@@ -294,7 +293,6 @@ ginDeletePage(GinVacuumState *gvs, BlockNumber deleteBlkno, BlockNumber leftBlkn
        XLogRecPtr  recptr;
        XLogRecData rdata[4];
        ginxlogDeletePage data;
-       int         n;
 
        data.node = gvs->index->rd_node;
        data.blkno = deleteBlkno;
@@ -315,32 +313,22 @@ ginDeletePage(GinVacuumState *gvs, BlockNumber deleteBlkno, BlockNumber leftBlkn
        rdata[1].len = 0;
        rdata[1].next = rdata + 2;
 
-       if (leftBlkno != InvalidBlockNumber)
-       {
-           rdata[2].buffer = lBuffer;
-           rdata[2].buffer_std = FALSE;
-           rdata[2].data = NULL;
-           rdata[2].len = 0;
-           rdata[2].next = rdata + 3;
-           n = 3;
-       }
-       else
-           n = 2;
+       rdata[2].buffer = lBuffer;
+       rdata[2].buffer_std = FALSE;
+       rdata[2].data = NULL;
+       rdata[2].len = 0;
+       rdata[2].next = rdata + 3;
 
-       rdata[n].buffer = InvalidBuffer;
-       rdata[n].buffer_std = FALSE;
-       rdata[n].len = sizeof(ginxlogDeletePage);
-       rdata[n].data = (char *) &data;
-       rdata[n].next = NULL;
+       rdata[3].buffer = InvalidBuffer;
+       rdata[3].buffer_std = FALSE;
+       rdata[3].len = sizeof(ginxlogDeletePage);
+       rdata[3].data = (char *) &data;
+       rdata[3].next = NULL;
 
        recptr = XLogInsert(RM_GIN_ID, XLOG_GIN_DELETE_PAGE, rdata);
        PageSetLSN(page, recptr);
        PageSetLSN(parentPage, recptr);
-       if (leftBlkno != InvalidBlockNumber)
-       {
-           page = BufferGetPage(lBuffer);
-           PageSetLSN(page, recptr);
-       }
+       PageSetLSN(BufferGetPage(lBuffer), recptr);
    }
 
    if (!isParentRoot)