On 07/13/2012 11:33 AM, Markus Wanner wrote:
> As another minor improvement, it doesn't seem necessary to repeatedly
> set the rootBlkno.
Sorry, my mail program delivered an older version of the patch, which
didn't reflect that change. Here's what I intended to send.
Regards
Markus Wanner
#
# Minor cleanup of ginInsertValue with additional asserts and
# a tighter loop for finding the root in the GinBtreeStack.
#
============================================================
*** src/backend/access/gin/ginbtree.c 2d3e63387737b4034fc25ca3cb128d9ac57f4f01
--- src/backend/access/gin/ginbtree.c f6dc88ae5716275e62a6f6715aa7204abd430089
*************** ginInsertValue(GinBtree btree, GinBtreeS
*** 276,294 ****
ginInsertValue(GinBtree btree, GinBtreeStack *stack, GinStatsData *buildStats)
{
GinBtreeStack *parent = stack;
! BlockNumber rootBlkno = InvalidBuffer;
Page page,
rpage,
lpage;
! /* remember root BlockNumber */
! while (parent)
! {
! rootBlkno = parent->blkno;
parent = parent->parent;
- }
! while (stack)
{
XLogRecData *rdata;
BlockNumber savedRightLink;
--- 276,296 ----
ginInsertValue(GinBtree btree, GinBtreeStack *stack, GinStatsData *buildStats)
{
GinBtreeStack *parent = stack;
! BlockNumber rootBlkno;
Page page,
rpage,
lpage;
! /* extract root BlockNumber from stack */
! Assert(stack != NULL);
! parent = stack;
! while (parent->parent)
parent = parent->parent;
! rootBlkno = parent->blkno;
! Assert(BlockNumberIsValid(rootBlkno));
!
! for (;;)
{
XLogRecData *rdata;
BlockNumber savedRightLink;
*************** ginInsertValue(GinBtree btree, GinBtreeS
*** 469,474 ****
--- 471,477 ----
UnlockReleaseBuffer(stack->buffer);
pfree(stack);
+ Assert(parent != NULL); /* parent == NULL case is handled above */
stack = parent;
}
}
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