2 files changed, 25 insertions, 2 deletions
diff --git a/src/include/access/gist_private.h b/src/include/access/gist_private.h
index 36ed7244ba0..a73716d6eaa 100644
--- a/src/include/access/gist_private.h
+++ b/src/include/access/gist_private.h
@@ -240,6 +240,7 @@ typedef struct GistSplitVector
 typedef struct
 {
 	Relation	r;
+	Relation	heapRel;
 	Size		freespace;		/* free space to be left */
 
 	GISTInsertStack *stack;
@@ -389,7 +390,8 @@ extern void freeGISTstate(GISTSTATE *giststate);
 extern void gistdoinsert(Relation r,
 			 IndexTuple itup,
 			 Size freespace,
-			 GISTSTATE *GISTstate);
+			 GISTSTATE *GISTstate,
+			 Relation heapRel);
 
 /* A List of these is returned from gistplacetopage() in *splitinfo */
 typedef struct
@@ -404,7 +406,8 @@ extern bool gistplacetopage(Relation rel, Size freespace, GISTSTATE *giststate,
 				OffsetNumber oldoffnum, BlockNumber *newblkno,
 				Buffer leftchildbuf,
 				List **splitinfo,
-				bool markleftchild);
+				bool markleftchild,
+				Relation heapRel);
 
 extern SplitedPageLayout *gistSplit(Relation r, Page page, IndexTuple *itup,
 		  int len, GISTSTATE *giststate);
@@ -414,6 +417,9 @@ extern XLogRecPtr gistXLogUpdate(Buffer buffer,
 			   IndexTuple *itup, int ntup,
 			   Buffer leftchild);
 
+XLogRecPtr gistXLogDelete(Buffer buffer, OffsetNumber *todelete,
+			   int ntodelete, RelFileNode hnode);
+
 extern XLogRecPtr gistXLogSplit(bool page_is_leaf,
 			  SplitedPageLayout *dist,
 			  BlockNumber origrlink, GistNSN oldnsn,
diff --git a/src/include/access/gistxlog.h b/src/include/access/gistxlog.h
index 1a2b9496d0d..b67c7100500 100644
--- a/src/include/access/gistxlog.h
+++ b/src/include/access/gistxlog.h
@@ -18,6 +18,7 @@
 #include "lib/stringinfo.h"
 
 #define XLOG_GIST_PAGE_UPDATE		0x00
+#define XLOG_GIST_DELETE			0x10 /* delete leaf index tuples for a page */
  /* #define XLOG_GIST_NEW_ROOT			 0x20 */	/* not used anymore */
 #define XLOG_GIST_PAGE_SPLIT		0x30
  /* #define XLOG_GIST_INSERT_COMPLETE	 0x40 */	/* not used anymore */
@@ -41,6 +42,22 @@ typedef struct gistxlogPageUpdate
 } gistxlogPageUpdate;
 
 /*
+ * Backup Blk 0: Leaf page, whose index tuples are deleted.
+ */
+typedef struct gistxlogDelete
+{
+	RelFileNode hnode;			/* RelFileNode of the heap the index currently
+								 * points at */
+	uint16		ntodelete;		/* number of deleted offsets */
+
+	/*
+	 * In payload of blk 0 : todelete OffsetNumbers
+	 */
+} gistxlogDelete;
+
+#define SizeOfGistxlogDelete	(offsetof(gistxlogDelete, ntodelete) + sizeof(uint16))
+
+/*
  * Backup Blk 0: If this operation completes a page split, by inserting a
  *				 downlink for the split page, the left half of the split
  * Backup Blk 1 - npage: split pages (1 is the original page)