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Remove unneeded argument from _bt_getstackbuf().
_bt_getstackbuf() is called at exactly two points following commit
efada2b8e9
(one call site is concerned with page splits, while the
other is concerned with page deletion). The parent buffer returned by
_bt_getstackbuf() is write-locked in both cases. Remove the 'access'
argument and make _bt_getstackbuf() assume that callers require a
write-lock.
This commit is contained in:
parent
067786cea0
commit
2ab23445bc
@ -1886,7 +1886,7 @@ _bt_insert_parent(Relation rel,
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* 05/27/97
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*/
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stack->bts_btentry = bknum;
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pbuf = _bt_getstackbuf(rel, stack, BT_WRITE);
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pbuf = _bt_getstackbuf(rel, stack);
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/*
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* Now we can unlock the right child. The left child will be unlocked
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@ -1976,10 +1976,11 @@ _bt_finish_split(Relation rel, Buffer lbuf, BTStack stack)
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*
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* Adjusts bts_blkno & bts_offset if changed.
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*
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* Returns InvalidBuffer if item not found (should not happen).
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* Returns write-locked buffer, or InvalidBuffer if item not found
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* (should not happen).
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*/
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Buffer
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_bt_getstackbuf(Relation rel, BTStack stack, int access)
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_bt_getstackbuf(Relation rel, BTStack stack)
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{
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BlockNumber blkno;
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OffsetNumber start;
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@ -1993,11 +1994,11 @@ _bt_getstackbuf(Relation rel, BTStack stack, int access)
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Page page;
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BTPageOpaque opaque;
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buf = _bt_getbuf(rel, blkno, access);
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buf = _bt_getbuf(rel, blkno, BT_WRITE);
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page = BufferGetPage(buf);
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opaque = (BTPageOpaque) PageGetSpecialPointer(page);
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if (access == BT_WRITE && P_INCOMPLETE_SPLIT(opaque))
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if (P_INCOMPLETE_SPLIT(opaque))
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{
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_bt_finish_split(rel, buf, stack->bts_parent);
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continue;
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@ -1153,7 +1153,7 @@ _bt_lock_branch_parent(Relation rel, BlockNumber child, BTStack stack,
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* if needed)
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*/
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stack->bts_btentry = child;
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pbuf = _bt_getstackbuf(rel, stack, BT_WRITE);
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pbuf = _bt_getstackbuf(rel, stack);
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if (pbuf == InvalidBuffer)
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elog(ERROR, "failed to re-find parent key in index \"%s\" for deletion target page %u",
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RelationGetRelationName(rel), child);
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@ -528,7 +528,7 @@ extern void _bt_parallel_advance_array_keys(IndexScanDesc scan);
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*/
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extern bool _bt_doinsert(Relation rel, IndexTuple itup,
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IndexUniqueCheck checkUnique, Relation heapRel);
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extern Buffer _bt_getstackbuf(Relation rel, BTStack stack, int access);
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extern Buffer _bt_getstackbuf(Relation rel, BTStack stack);
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extern void _bt_finish_split(Relation rel, Buffer bbuf, BTStack stack);
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/*
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