fix for 9.4 (not tested yet)

diff --git a/gevel.c b/gevel.c
index fe2f896..7858080 100644 (file)
--- a/gevel.c
+++ b/gevel.c
@@ -2,6 +2,9 @@
 
 #include "access/genam.h"
 #include "access/gin.h"
+#if PG_VERSION_NUM >= 90400
+#include "utils/snapmgr.h"
+#endif
 #if PG_VERSION_NUM >= 90100
 #include "access/gin_private.h"
 #endif
@@ -691,25 +694,43 @@ processTuple( FuncCallContext  *funcctx,  GinStatState *st, IndexTuple itup ) {
                
        if ( GinIsPostingTree(itup) ) {
                BlockNumber     rootblkno = GinGetPostingTree(itup);
+#if PG_VERSION_NUM >= 90400
+               GinBtreeData    btree, *gdi = &btree;
+               GinBtreeStack   *stack;
+#else
                GinPostingTreeScan *gdi;
                Buffer          entrybuffer;              
+#endif
                Page        page;
+               uint32          predictNumber;
 
                LockBuffer(st->buffer, GIN_UNLOCK);
-#if PG_VERSION_NUM >= 90100
+#if PG_VERSION_NUM >= 90400
+               ginPrepareDataScan(gdi, st->index, rootblkno);
+               stack = ginScanBeginPostingTree(gdi, st->index, rootblkno);
+               page = BufferGetPage(stack->buffer);
+               predictNumber = stack->predictNumber;
+#elif PG_VERSION_NUM >= 90100
                gdi = ginPrepareScanPostingTree(st->index, rootblkno, TRUE);
                entrybuffer = ginScanBeginPostingTree(gdi);
+               page = BufferGetPage(entrybuffer);
+               predictNumber = gdi->stack->predictNumber;
 #else
                gdi = prepareScanPostingTree(st->index, rootblkno, TRUE);
                entrybuffer = scanBeginPostingTree(gdi);
+               page = BufferGetPage(entrybuffer);
+               predictNumber = gdi->stack->predictNumber;
 #endif
 
-               page = BufferGetPage(entrybuffer);
-               st->dvalues[1] = Int32GetDatum( gdi->stack->predictNumber * GinPageGetOpaque(page)->maxoff );
+               st->dvalues[1] = Int32GetDatum( predictNumber * GinPageGetOpaque(page)->maxoff );
 
+#if PG_VERSION_NUM < 90400
                LockBuffer(entrybuffer, GIN_UNLOCK);
                freeGinBtreeStack(gdi->stack);
                pfree(gdi);
+#else
+               freeGinBtreeStack(stack);
+#endif
        } else {
                st->dvalues[1] = Int32GetDatum( GinGetNPosting(itup) );
                LockBuffer(st->buffer, GIN_UNLOCK);
@@ -808,7 +829,11 @@ gin_count_estimate(PG_FUNCTION_ARGS) {
        fmgr_info( F_TS_MATCH_VQ , &key.sk_func );
 
 #if PG_VERSION_NUM >= 90100
+#if PG_VERSION_NUM >= 90400
+       scan = index_beginscan_bitmap(index, GetTransactionSnapshot(), 1);
+#else
        scan = index_beginscan_bitmap(index, SnapshotNow, 1);
+#endif
        index_rescan(scan, &key, 1, NULL, 0);
 
        count = index_getbitmap(scan, bitmap);