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Code Issues

Integrated the jumping information natively into the index bucket.

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WARNING: This is an ODS change, databases must be recreated.
This commit is contained in:
dimitr 2012-03-14 14:33:41 +00:00
parent 455c4c82d6
commit 05c27aa212
7 changed files with 170 additions and 260 deletions
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47
src/jrd/btn.cpp
View File

@ -300,30 +300,6 @@ USHORT IndexNode::getNodeSize(bool leafNode) const
}
UCHAR* IndexJumpInfo::readJumpInfo(UCHAR* pagePointer)
{
/**************************************
*
* r e a d J u m p I n f o
*
**************************************
*
* Functional description
* Read jump information from the page
* by the given pagePointer and the
* return the remaining position after
* the read.
*
**************************************/
firstNodeOffset = get_short(pagePointer);
pagePointer += sizeof(USHORT);
jumpAreaSize = get_short(pagePointer);
pagePointer += sizeof(USHORT);
jumpers = (USHORT)(*pagePointer++);
return pagePointer;
}
UCHAR* IndexJumpNode::readJumpNode(UCHAR* pagePointer)
{
/**************************************
@ -366,29 +342,6 @@ UCHAR* IndexJumpNode::readJumpNode(UCHAR* pagePointer)
}
UCHAR* IndexJumpInfo::writeJumpInfo(btree_page* page) const
{
/**************************************
*
* w r i t e J u m p I n f o
*
**************************************
*
* Functional description
* Write jump information to the page by the
* given pointer.
*
**************************************/
UCHAR* pointer = page->btr_nodes;
put_short(pointer, firstNodeOffset);
pointer += sizeof(USHORT);
put_short(pointer, jumpAreaSize);
pointer += sizeof(USHORT);
*pointer++ = (UCHAR) jumpers;
return pointer;
}
UCHAR* IndexJumpNode::writeJumpNode(UCHAR* pagePointer)
{
/**************************************

25
src/jrd/btn.h
View File

@ -276,31 +276,6 @@ struct IndexJumpNode
UCHAR* writeJumpNode(UCHAR* pagePointer);
};
struct IndexJumpInfo
{
USHORT firstNodeOffset; // offset to node in page
USHORT jumpAreaSize; // size area before a new jumpnode is made
UCHAR jumpers; // nr of jump-nodes in page, with a maximum of 255
static UCHAR* getPointerFirstNode(Ods::btree_page* page, IndexJumpInfo* jumpInfo = NULL)
{
if (jumpInfo)
{
UCHAR* pointer = page->btr_nodes;
return jumpInfo->readJumpInfo(pointer);
}
IndexJumpInfo jumpInformation;
UCHAR* pointer = page->btr_nodes;
jumpInformation.readJumpInfo(pointer);
return reinterpret_cast<UCHAR*>(page) + jumpInformation.firstNodeOffset;
}
UCHAR* readJumpInfo(UCHAR* pagePointer);
UCHAR* writeJumpInfo(Ods::btree_page* page) const;
};
struct dynKey
{
USHORT keyLength;

323
src/jrd/btr.cpp
View File

@ -678,7 +678,7 @@ void BTR_evaluate(thread_db* tdbb, const IndexRetrieval* retrieval, RecordBitmap
}
else
{
pointer = IndexJumpInfo::getPointerFirstNode(page);
pointer = page->btr_nodes + page->btr_jump_size;
prefix = 0;
skipLowerKey = false;
}
@ -690,7 +690,7 @@ void BTR_evaluate(thread_db* tdbb, const IndexRetrieval* retrieval, RecordBitmap
skipLowerKey, lower))
{
page = (btree_page*) CCH_HANDOFF(tdbb, &window, page->btr_sibling, LCK_read, pag_index);
pointer = IndexJumpInfo::getPointerFirstNode(page);
pointer = page->btr_nodes + page->btr_jump_size;
prefix = 0;
}
}
@ -743,8 +743,8 @@ void BTR_evaluate(thread_db* tdbb, const IndexRetrieval* retrieval, RecordBitmap
}
page = (btree_page*) CCH_HANDOFF(tdbb, &window, page->btr_sibling, LCK_read, pag_index);
endPointer = (UCHAR*)page + page->btr_length;
pointer = IndexJumpInfo::getPointerFirstNode(page);
endPointer = (UCHAR*) page + page->btr_length;
pointer = page->btr_nodes + page->btr_jump_size;
pointer = node.readNode(pointer, true);
// Check if pointer is still valid
if (pointer > endPointer) {
@ -889,7 +889,7 @@ btree_page* BTR_find_page(thread_db* tdbb,
{
UCHAR* pointer;
const UCHAR* const endPointer = (UCHAR*) page + page->btr_length;
pointer = IndexJumpInfo::getPointerFirstNode(page);
pointer = page->btr_nodes + page->btr_jump_size;
pointer = node.readNode(pointer, false);
// Check if pointer is still valid
if (pointer > endPointer) {
@ -1000,12 +1000,7 @@ void BTR_insert(thread_db* tdbb, WIN* root_window, index_insertion* insertion)
const USHORT btr_relation = bucket->btr_relation;
const UCHAR btr_level = bucket->btr_level + 1;
const UCHAR btr_id = bucket->btr_id;
IndexJumpInfo jumpInfo;
// First get jumpinfo from the level deeper, because we need
// to know jumpAreaSize and keyLength.
IndexJumpInfo::getPointerFirstNode(bucket, &jumpInfo);
jumpInfo.jumpers = 0;
const USHORT btr_jump_interval = bucket->btr_jump_interval;
// hvlad: don't even try to use page buffer after page was released
bucket = NULL;
@ -1029,12 +1024,12 @@ void BTR_insert(thread_db* tdbb, WIN* root_window, index_insertion* insertion)
new_bucket->btr_level = btr_level;
new_bucket->btr_id = btr_id;
// Write uncomplete jumpinfo, so we can set the firstNodeOffset
// to the correct position.
UCHAR* pointer = jumpInfo.writeJumpInfo(new_bucket);
// Finally write correct jumpinfo.
jumpInfo.firstNodeOffset = (pointer - (UCHAR*)new_bucket);
pointer = jumpInfo.writeJumpInfo(new_bucket);
// Write jumpinfo
new_bucket->btr_jump_interval = btr_jump_interval;
new_bucket->btr_jump_size = 0;
new_bucket->btr_jump_count = 0;
UCHAR* pointer = new_bucket->btr_nodes;
// Set up first node as degenerate, but pointing to first bucket on
// next level.
@ -1750,7 +1745,7 @@ void BTR_remove(thread_db* tdbb, WIN* root_window, index_insertion* insertion)
// get the page number of the child, and check to make sure
// the page still has only one node on it
UCHAR* pointer = IndexJumpInfo::getPointerFirstNode(page);
UCHAR* pointer = page->btr_nodes + page->btr_jump_size;
IndexNode pageNode;
pointer = pageNode.readNode(pointer, false);
@ -1950,13 +1945,13 @@ void BTR_selectivity(thread_db* tdbb, jrd_rel* relation, USHORT id, SelectivityL
btree_page* bucket = (btree_page*) CCH_HANDOFF(tdbb, &window, page, LCK_read, pag_index);
// go down the left side of the index to leaf level
UCHAR* pointer = IndexJumpInfo::getPointerFirstNode(bucket);
UCHAR* pointer = bucket->btr_nodes + bucket->btr_jump_size;
while (bucket->btr_level)
{
IndexNode pageNode;
pageNode.readNode(pointer, false);
bucket = (btree_page*) CCH_HANDOFF(tdbb, &window, pageNode.pageNumber, LCK_read, pag_index);
pointer = IndexJumpInfo::getPointerFirstNode(bucket);
pointer = bucket->btr_nodes + bucket->btr_jump_size;
page = pageNode.pageNumber;
}
@ -2070,7 +2065,7 @@ void BTR_selectivity(thread_db* tdbb, jrd_rel* relation, USHORT id, SelectivityL
// figure out if this is a duplicate
bool dup;
if (node.nodePointer == IndexJumpInfo::getPointerFirstNode(bucket)) {
if (node.nodePointer == bucket->btr_nodes + bucket->btr_jump_size) {
dup = node.keyEqual(key.key_length, key.key_data);
}
else {
@ -2094,7 +2089,7 @@ void BTR_selectivity(thread_db* tdbb, jrd_rel* relation, USHORT id, SelectivityL
break;
}
bucket = (btree_page*) CCH_HANDOFF_TAIL(tdbb, &window, page, LCK_read, pag_index);
pointer = IndexJumpInfo::getPointerFirstNode(bucket);
pointer = bucket->btr_nodes + bucket->btr_jump_size;
}
CCH_RELEASE_TAIL(tdbb, &window);
@ -2854,22 +2849,21 @@ static contents delete_node(thread_db* tdbb, WIN* window, UCHAR* pointer)
jumpNodeList tmpJumpNodes;
jumpNodeList* jumpNodes = &tmpJumpNodes;
IndexJumpInfo jumpInfo;
pointer = IndexJumpInfo::getPointerFirstNode(page, &jumpInfo);
pointer = page->btr_nodes;
// We are going to rebuild jump nodes. In the end of this process we will either have
// the same jump nodes as before or one jump node less. jumpInfo.firstNodeOffset
// the same jump nodes as before or one jump node less. The jump table size
// by its definition is a good upper estimate for summary size of all existing
// jump nodes data length's.
// After rebuild jump node next after removed one may have new length longer than
// before rebuild but no longer than length of removed node. All other nodes didn't
// change its lengths. Therefore jumpInfo.firstNodeOffset is valid upper estimate
// change its lengths. Therefore the jump table size is valid upper estimate
// for summary size of all new jump nodes data length's too.
tempData = tempBuf.getBuffer(jumpInfo.firstNodeOffset);
UCHAR* const tempEnd = tempData + jumpInfo.firstNodeOffset;
tempData = tempBuf.getBuffer(page->btr_jump_size);
UCHAR* const tempEnd = tempBuf.end();
bool rebuild = false;
USHORT n = jumpInfo.jumpers;
UCHAR n = page->btr_jump_count;
IndexJumpNode jumpNode, delJumpNode;
while (n)
{
@ -2919,11 +2913,11 @@ static contents delete_node(thread_db* tdbb, WIN* window, UCHAR* pointer)
n--;
}
// Update jump information.
jumpInfo.jumpers = jumpNodes->getCount();
pointer = jumpInfo.writeJumpInfo(page);
// Update jump information
page->btr_jump_count = (UCHAR) jumpNodes->getCount();
// Write jump nodes.
// Write jump nodes
pointer = page->btr_nodes;
IndexJumpNode* walkJumpNode = jumpNodes->begin();
for (size_t i = 0; i < jumpNodes->getCount(); i++) {
pointer = walkJumpNode[i].writeJumpNode(pointer);
@ -2931,7 +2925,7 @@ static contents delete_node(thread_db* tdbb, WIN* window, UCHAR* pointer)
jumpNodes->clear();
// check to see if the page is now empty
pointer = IndexJumpInfo::getPointerFirstNode(page);
pointer = page->btr_nodes + page->btr_jump_size;
IndexNode node;
pointer = node.readNode(pointer, leafPage);
if (node.isEndBucket || node.isEndLevel) {
@ -2999,7 +2993,7 @@ static void delete_tree(thread_db* tdbb,
{
if (page->btr_level)
{
UCHAR* pointer = IndexJumpInfo::getPointerFirstNode(page);
UCHAR* pointer = page->btr_nodes + page->btr_jump_size;
IndexNode pageNode;
pageNode.readNode(pointer, false);
down = pageNode.pageNumber;
@ -3124,10 +3118,6 @@ static ULONG fast_load(thread_db* tdbb,
jumpKeys.push(FB_NEW(*tdbb->getDefaultPool()) dynKey);
jumpKeys[0]->keyData = FB_NEW(*tdbb->getDefaultPool()) UCHAR[key_length];
IndexJumpInfo jumpInfo;
jumpInfo.jumpAreaSize = 0;
jumpInfo.jumpers = 0;
// AB: Let's try to determine to size between the jumps to speed up
// index search. Of course the size depends on the key_length. The
// bigger the key, the less jumps we can make. (Although we must
@ -3138,7 +3128,7 @@ static ULONG fast_load(thread_db* tdbb,
// Remember, the lower the value how more jumpkeys are generated and
// how faster jumpkeys are recalculated on insert.
jumpInfo.jumpAreaSize = 512 + ((int)sqrt((float)key_length) * 16);
const USHORT jumpAreaSize = 512 + ((int)sqrt((float)key_length) * 16);
// key_size | jumpAreaSize
// ----------+-----------------
@ -3174,17 +3164,16 @@ static ULONG fast_load(thread_db* tdbb,
bucket->btr_id = (UCHAR)(idx->idx_id % 256);
bucket->btr_level = 0;
bucket->btr_length = BTR_SIZE;
bucket->btr_jump_interval = jumpAreaSize;
bucket->btr_jump_size = 0;
bucket->btr_jump_count = 0;
#ifdef DEBUG_BTR_PAGES
sprintf(debugtext, "\t new page (%d)", windows[0].win_page);
gds__log(debugtext);
#endif
UCHAR* pointer = jumpInfo.writeJumpInfo(bucket);
jumpInfo.firstNodeOffset = (USHORT)(pointer - (UCHAR*)bucket);
jumpInfo.jumpers = 0;
pointer = jumpInfo.writeJumpInfo(bucket);
bucket->btr_length = jumpInfo.firstNodeOffset;
newAreaPointers[0] = pointer + jumpInfo.firstNodeOffset;
UCHAR* pointer = bucket->btr_nodes;
newAreaPointers[0] = pointer + jumpAreaSize;
tdbb->tdbb_flags |= TDBB_no_cache_unwind;
@ -3214,7 +3203,6 @@ static ULONG fast_load(thread_db* tdbb,
jumpNodeList* leafJumpNodes = jumpNodes[0];
bool duplicate = false;
totalJumpSize[0] = 0;
const USHORT headerSize = (pointer - (UCHAR*)bucket);
IndexNode tempNode;
jumpKey->keyLength = 0;
@ -3257,7 +3245,7 @@ static ULONG fast_load(thread_db* tdbb,
previousNode.readNode(previousNode.nodePointer, true);
previousNode.setEndBucket();
pointer = previousNode.writeNode(previousNode.nodePointer, true, false);
bucket->btr_length = pointer - (UCHAR*)bucket;
bucket->btr_length = pointer - (UCHAR*) bucket;
if (totalJumpSize[0])
{
@ -3265,20 +3253,19 @@ static ULONG fast_load(thread_db* tdbb,
// CVC: Warning, this may overlap. It seems better to use
// memmove or to ensure manually that totalJumpSize[0] > l
// Also, "sliding down" here is moving contents higher in memory.
const USHORT l = bucket->btr_length - headerSize;
UCHAR* p = (UCHAR*)bucket + headerSize;
memmove(p + totalJumpSize[0], p, l);
const USHORT l = bucket->btr_length - BTR_SIZE;
memmove(bucket->btr_nodes + totalJumpSize[0], bucket->btr_nodes, l);
// Update JumpInfo
jumpInfo.firstNodeOffset = headerSize + totalJumpSize[0];
if (leafJumpNodes->getCount() > 255) {
BUGCHECK(205); // msg 205 index bucket overfilled
}
jumpInfo.jumpers = (UCHAR)leafJumpNodes->getCount();
pointer = jumpInfo.writeJumpInfo(bucket);
bucket->btr_jump_interval = jumpAreaSize;
bucket->btr_jump_size = totalJumpSize[0];
bucket->btr_jump_count = (UCHAR) leafJumpNodes->getCount();
// Write jumpnodes on page.
pointer = (UCHAR*)bucket + headerSize;
pointer = bucket->btr_nodes;
IndexJumpNode* walkJumpNode = leafJumpNodes->begin();
for (size_t i = 0; i < leafJumpNodes->getCount(); i++)
{
@ -3301,18 +3288,18 @@ static ULONG fast_load(thread_db* tdbb,
split->btr_relation = bucket->btr_relation;
split->btr_level = bucket->btr_level;
split->btr_id = bucket->btr_id;
split->btr_jump_interval = bucket->btr_jump_interval;
split->btr_jump_size = 0;
split->btr_jump_count = 0;
#ifdef DEBUG_BTR_PAGES
sprintf(debugtext, "\t new page (%d), left page (%d)",
split_window.win_page, split->btr_left_sibling);
gds__log(debugtext);
#endif
pointer = jumpInfo.writeJumpInfo(split);
jumpInfo.firstNodeOffset = (USHORT)(pointer - (UCHAR*)split);
jumpInfo.jumpers = 0;
pointer = jumpInfo.writeJumpInfo(split);
// Reset position and size for generating jumpnode
newAreaPointers[0] = pointer + jumpInfo.jumpAreaSize;
pointer = split->btr_nodes;
newAreaPointers[0] = pointer + jumpAreaSize;
totalJumpSize[0] = 0;
jumpKey->keyLength = 0;
@ -3470,7 +3457,7 @@ static ULONG fast_load(thread_db* tdbb,
memcpy(jumpKey->keyData + jumpNode.prefix, jumpNode.data, jumpNode.length);
jumpKey->keyLength = jumpNode.length + jumpNode.prefix;
// Set new position for generating jumpnode
newAreaPointers[0] += jumpInfo.jumpAreaSize;
newAreaPointers[0] += jumpAreaSize;
totalJumpSize[0] += jumpNodeSize;
}
}
@ -3496,6 +3483,9 @@ static ULONG fast_load(thread_db* tdbb,
bucket->btr_id = (UCHAR)(idx->idx_id % 256);
fb_assert(level <= MAX_UCHAR);
bucket->btr_level = (UCHAR) level;
bucket->btr_jump_interval = jumpAreaSize;
bucket->btr_jump_size = 0;
bucket->btr_jump_count = 0;
#ifdef DEBUG_BTR_PAGES
sprintf(debugtext, "\t new page (%d)", window->win_page);
gds__log(debugtext);
@ -3505,10 +3495,7 @@ static ULONG fast_load(thread_db* tdbb,
// page with a "degenerate" zero-length node indicating that this page holds
// any key value less than the next node
levelPointer = jumpInfo.writeJumpInfo(bucket);
jumpInfo.firstNodeOffset = (USHORT)(levelPointer - (UCHAR*)bucket);
jumpInfo.jumpers = 0;
levelPointer = jumpInfo.writeJumpInfo(bucket);
levelPointer = bucket->btr_nodes;
// First record-number of level must be zero
levelNode[level].setNode(0, 0, RecordNumber(0), split_pages[level - 1]);
@ -3522,7 +3509,7 @@ static ULONG fast_load(thread_db* tdbb,
jumpKeys[level]->keyLength = 0;
jumpKeys[level]->keyData = FB_NEW(*tdbb->getDefaultPool()) UCHAR[key_length];
totalJumpSize[level] = 0;
newAreaPointers[level] = levelPointer + jumpInfo.jumpAreaSize;
newAreaPointers[level] = levelPointer + jumpAreaSize;
}
dynKey* pageJumpKey = jumpKeys[level];
@ -3561,20 +3548,19 @@ static ULONG fast_load(thread_db* tdbb,
// CVC: Warning, this may overlap. It seems better to use
// memmove or to ensure manually that totalJumpSize[0] > l
// Also, "sliding down" here is moving contents higher in memory.
const USHORT l = bucket->btr_length - headerSize;
UCHAR* p = (UCHAR*)bucket + headerSize;
memmove(p + totalJumpSize[level], p, l);
const USHORT l = bucket->btr_length - BTR_SIZE;
memmove(bucket->btr_nodes + totalJumpSize[level], bucket->btr_nodes, l);
// Update JumpInfo
jumpInfo.firstNodeOffset = headerSize + totalJumpSize[level];
if (pageJumpNodes->getCount() > 255) {
BUGCHECK(205); // msg 205 index bucket overfilled
}
jumpInfo.jumpers = (UCHAR)pageJumpNodes->getCount();
levelPointer = jumpInfo.writeJumpInfo(bucket);
bucket->btr_jump_interval = jumpAreaSize;
bucket->btr_jump_size = totalJumpSize[level];
bucket->btr_jump_count = (UCHAR) pageJumpNodes->getCount();
// Write jumpnodes on page.
levelPointer = (UCHAR*)bucket + headerSize;
levelPointer = bucket->btr_nodes;
IndexJumpNode* walkJumpNode = pageJumpNodes->begin();
for (size_t i = 0; i < pageJumpNodes->getCount(); i++)
{
@ -3596,18 +3582,18 @@ static ULONG fast_load(thread_db* tdbb,
split->btr_relation = bucket->btr_relation;
split->btr_level = bucket->btr_level;
split->btr_id = bucket->btr_id;
split->btr_jump_interval = bucket->btr_jump_interval;
split->btr_jump_size = 0;
split->btr_jump_count = 0;
#ifdef DEBUG_BTR_PAGES
sprintf(debugtext, "\t new page (%d), left page (%d)",
split_window.win_page, split->btr_left_sibling);
gds__log(debugtext);
#endif
levelPointer = jumpInfo.writeJumpInfo(split);
jumpInfo.firstNodeOffset = (USHORT)(levelPointer - (UCHAR*)split);
jumpInfo.jumpers = 0;
levelPointer = jumpInfo.writeJumpInfo(split);
levelPointer = split->btr_nodes;
// Reset position and size for generating jumpnode
newAreaPointers[level] = levelPointer + jumpInfo.jumpAreaSize;
newAreaPointers[level] = levelPointer + jumpAreaSize;
totalJumpSize[level] = 0;
pageJumpKey->keyLength = 0;
@ -3677,7 +3663,7 @@ static ULONG fast_load(thread_db* tdbb,
memcpy(pageJumpKey->keyData + jumpNode.prefix, jumpNode.data, jumpNode.length);
pageJumpKey->keyLength = jumpNode.length + jumpNode.prefix;
// Set new position for generating jumpnode
newAreaPointers[level] += jumpInfo.jumpAreaSize;
newAreaPointers[level] += jumpAreaSize;
totalJumpSize[level] += jumpNodeSize;
}
}
@ -3719,19 +3705,19 @@ static ULONG fast_load(thread_db* tdbb,
// CVC: Warning, this may overlap. It seems better to use
// memmove or to ensure manually that totalJumpSize[0] > l
// Also, "sliding down" here is moving contents higher in memory.
const USHORT l = bucket->btr_length - headerSize;
UCHAR* p = (UCHAR*)bucket + headerSize;
memmove(p + totalJumpSize[level], p, l);
const USHORT l = bucket->btr_length - BTR_SIZE;
memmove(bucket->btr_nodes + totalJumpSize[level], bucket->btr_nodes, l);
// Update JumpInfo
jumpInfo.firstNodeOffset = headerSize + totalJumpSize[level];
if (pageJumpNodes->getCount() > 255) {
BUGCHECK(205); // msg 205 index bucket overfilled
}
jumpInfo.jumpers = (UCHAR)pageJumpNodes->getCount();
pointer = jumpInfo.writeJumpInfo(bucket);
bucket->btr_jump_interval = jumpAreaSize;
bucket->btr_jump_size = totalJumpSize[level];
bucket->btr_jump_count = (UCHAR) pageJumpNodes->getCount();
// Write jumpnodes on page.
pointer = bucket->btr_nodes;
IndexJumpNode* walkJumpNode = pageJumpNodes->begin();
for (size_t i = 0; i < pageJumpNodes->getCount(); i++)
{
@ -3911,7 +3897,7 @@ static UCHAR* find_node_start_point(btree_page* bucket, temporary_key* key,
// Because it's length and prefix is 0 a descending index would see it
// always as the first matching node.
if (!leafPage && descending &&
(node.nodePointer == IndexJumpInfo::getPointerFirstNode(bucket)) && (node.length == 0))
(node.nodePointer == bucket->btr_nodes + bucket->btr_jump_size) && (node.length == 0))
{
pointer = node.readNode(pointer, leafPage);
// Check if pointer is still valid
@ -4032,13 +4018,12 @@ static UCHAR* find_area_start_point(btree_page* bucket, const temporary_key* key
const UCHAR* const keyEnd = keyPointer + key->key_length;
// Retrieve jump information.
IndexJumpInfo jumpInfo;
UCHAR* pointer = IndexJumpInfo::getPointerFirstNode(bucket, &jumpInfo);
USHORT n = jumpInfo.jumpers;
UCHAR* pointer = bucket->btr_nodes;
UCHAR n = bucket->btr_jump_count;
// Set begin of page as default.
IndexJumpNode prevJumpNode;
prevJumpNode.offset = jumpInfo.firstNodeOffset;
prevJumpNode.offset = BTR_SIZE + bucket->btr_jump_size;
prevJumpNode.prefix = 0;
prevJumpNode.length = 0;
@ -4260,7 +4245,7 @@ static ULONG find_page(btree_page* bucket, const temporary_key* key,
if (node.isEndBucket || node.isEndLevel)
{
pointer = IndexJumpInfo::getPointerFirstNode(bucket);
pointer = bucket->btr_nodes + bucket->btr_jump_size;
pointer = node.readNode(pointer, leafPage);
// Check if pointer is still valid
if (pointer > endPointer) {
@ -4273,7 +4258,7 @@ static ULONG find_page(btree_page* bucket, const temporary_key* key,
}
ULONG previousNumber = node.pageNumber;
if (node.nodePointer == IndexJumpInfo::getPointerFirstNode(bucket))
if (node.nodePointer == bucket->btr_nodes + bucket->btr_jump_size)
{
prefix = 0;
// Handle degenerating node, always generated at first
@ -4477,7 +4462,7 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
// Find the node on the parent's level--the parent page could
// have split while we didn't have it locked
UCHAR* parentPointer = IndexJumpInfo::getPointerFirstNode(parent_page);
UCHAR* parentPointer = parent_page->btr_nodes + parent_page->btr_jump_size;
IndexNode parentNode;
while (true)
{
@ -4486,7 +4471,7 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
{
parent_page = (btree_page*) CCH_HANDOFF(tdbb, &parent_window,
parent_page->btr_sibling, LCK_write, pag_index);
parentPointer = IndexJumpInfo::getPointerFirstNode(parent_page);
parentPointer = parent_page->btr_nodes + parent_page->btr_jump_size;
continue;
}
@ -4519,7 +4504,7 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
// no more keys on this page, it will not be garbage-collected itself. When the page
// to the right falls below the threshold for garbage collection, it will be merged with
// this page.
if (parentNode.nodePointer == IndexJumpInfo::getPointerFirstNode(parent_page))
if (parentNode.nodePointer == parent_page->btr_nodes + parent_page->btr_jump_size)
{
CCH_RELEASE(tdbb, &parent_window);
return contents_above_threshold;
@ -4621,17 +4606,16 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
const bool leafPage = (gc_page->btr_level == 0);
UCHAR* leftPointer = IndexJumpInfo::getPointerFirstNode(left_page);
UCHAR* leftPointer = left_page->btr_nodes + left_page->btr_jump_size;
temporary_key lastKey;
lastKey.key_flags = 0;
lastKey.key_length = 0;
IndexNode leftNode;
IndexJumpInfo leftJumpInfo;
UCHAR* pointer = IndexJumpInfo::getPointerFirstNode(left_page, &leftJumpInfo);
UCHAR* pointer = left_page->btr_nodes;
// Walk trough node jumpers.
USHORT n = leftJumpInfo.jumpers;
UCHAR n = left_page->btr_jump_count;
IndexJumpNode jumpNode;
while (n)
{
@ -4668,15 +4652,14 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
// see if there's enough space on the left page to move all the nodes to it
// and leave some extra space for expansion (at least one key length)
UCHAR* gcPointer = IndexJumpInfo::getPointerFirstNode(gc_page);
UCHAR* gcPointer = gc_page->btr_nodes + gc_page->btr_jump_size;
IndexNode gcNode;
gcNode.readNode(gcPointer, leafPage);
const USHORT prefix = IndexNode::computePrefix(lastKey.key_data, lastKey.key_length,
gcNode.data, gcNode.length);
// Get pointer for calculating gcSize (including jump nodes).
IndexJumpInfo gcJumpInfo;
gcPointer = IndexJumpInfo::getPointerFirstNode(gc_page, &gcJumpInfo);
gcPointer = gc_page->btr_nodes;
const USHORT gcSize = gc_page->btr_length - (gcPointer - (UCHAR*)(gc_page));
const USHORT leftAssumedSize = left_page->btr_length + gcSize - prefix;
@ -4700,19 +4683,18 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
SLONG scratchPage[OVERSIZE];
btree_page* const newBucket = (btree_page*) scratchPage;
IndexJumpInfo jumpInfo;
pointer = IndexJumpInfo::getPointerFirstNode(left_page, &jumpInfo);
const USHORT headerSize = (pointer - (UCHAR*) left_page);
const USHORT jumpersOriginalSize = jumpInfo.firstNodeOffset - headerSize;
pointer = left_page->btr_nodes;
const USHORT jumpersOriginalSize = left_page->btr_jump_size;
const USHORT jumpAreaSize = left_page->btr_jump_interval;
// Copy header and data
memcpy(newBucket, left_page, headerSize);
memcpy((UCHAR*) newBucket + headerSize, (UCHAR*) left_page + jumpInfo.firstNodeOffset,
left_page->btr_length - jumpInfo.firstNodeOffset);
memcpy(newBucket, left_page, BTR_SIZE);
memcpy(newBucket->btr_nodes, left_page->btr_nodes + left_page->btr_jump_size,
left_page->btr_length - left_page->btr_jump_size - BTR_SIZE);
// Update leftPointer to scratch page.
leftPointer = (UCHAR*) newBucket + (leftPointer - (UCHAR*) left_page) - jumpersOriginalSize;
gcPointer = IndexJumpInfo::getPointerFirstNode(gc_page);
gcPointer = gc_page->btr_nodes + gc_page->btr_jump_size;
//
leftNode.readNode(leftPointer, leafPage);
// Calculate the total amount of compression on page as the combined
@ -4731,7 +4713,7 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
leftPointer = leftNode.writeNode(leftPointer, leafPage);
// Update page-size.
newBucket->btr_length = (leftPointer - (UCHAR*)newBucket);
newBucket->btr_length = leftPointer - (UCHAR*) newBucket;
// copy over the remainder of the page to be garbage-collected.
const USHORT l = gc_page->btr_length - (gcPointer - (UCHAR*)(gc_page));
memcpy(leftPointer, gcPointer, l);
@ -4743,9 +4725,9 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
USHORT jumpersNewSize = 0;
// Update jump information on scratch page, so generate_jump_nodes
// can deal with it.
jumpInfo.firstNodeOffset = headerSize;
jumpInfo.jumpers = 0;
jumpInfo.writeJumpInfo(newBucket);
newBucket->btr_jump_interval = jumpAreaSize;
newBucket->btr_jump_size = 0;
newBucket->btr_jump_count = 0;
generate_jump_nodes(tdbb, newBucket, &jumpNodes, 0, &jumpersNewSize, NULL, NULL);
// Now we know exact how big our updated left page is, so check size
@ -4813,10 +4795,12 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
}
// Finally write all data to left page.
jumpInfo.firstNodeOffset = headerSize + jumpersNewSize;
jumpInfo.jumpers = jumpNodes.getCount();
pointer = jumpInfo.writeJumpInfo(left_page);
left_page->btr_jump_interval = jumpAreaSize;
left_page->btr_jump_size = jumpersNewSize;
left_page->btr_jump_count = (UCHAR) jumpNodes.getCount();
// Write jump nodes.
pointer = left_page->btr_nodes;
IndexJumpNode* walkJumpNode = jumpNodes.begin();
for (size_t i = 0; i < jumpNodes.getCount(); i++)
{
@ -4826,7 +4810,7 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
delete[] walkJumpNode[i].data;
}
// Copy data.
memcpy(pointer, (UCHAR*) newBucket + headerSize, newBucket->btr_length - headerSize);
memcpy(pointer, newBucket->btr_nodes, newBucket->btr_length - BTR_SIZE);
// Update page header information.
left_page->btr_prefix_total = newBucket->btr_prefix_total;
left_page->btr_length = newBucket->btr_length + jumpersNewSize;
@ -4881,7 +4865,7 @@ static contents garbage_collect(thread_db* tdbb, WIN* window, ULONG parent_numbe
}
// check whether it is empty
parentPointer = IndexJumpInfo::getPointerFirstNode(parent_page);
parentPointer = parent_page->btr_nodes + parent_page->btr_jump_size;
IndexNode parentNode2;
parentPointer = parentNode2.readNode(parentPointer, false);
if (parentNode2.isEndBucket || parentNode2.isEndLevel) {
@ -4930,12 +4914,11 @@ static void generate_jump_nodes(thread_db* tdbb, btree_page* page,
fb_assert(jumpNodes);
fb_assert(jumpersSize);
IndexJumpInfo jumpInfo;
IndexJumpInfo::getPointerFirstNode(page, &jumpInfo);
const bool leafPage = (page->btr_level == 0);
const USHORT jumpAreaSize = page->btr_jump_interval;
*jumpersSize = 0;
UCHAR* pointer = (UCHAR*)page + jumpInfo.firstNodeOffset;
UCHAR* pointer = page->btr_nodes + page->btr_jump_size;
temporary_key jumpKey, currentKey;
jumpKey.key_flags = 0;
@ -4953,7 +4936,7 @@ static void generate_jump_nodes(thread_db* tdbb, btree_page* page,
*splitPrefix = 0;
}
const UCHAR* newAreaPosition = pointer + jumpInfo.jumpAreaSize;
const UCHAR* newAreaPosition = pointer + jumpAreaSize;
const UCHAR* const endpoint = ((UCHAR*)page + page->btr_length);
const UCHAR* const halfpoint = ((UCHAR*)page + (dbb->dbb_page_size / 2));
const UCHAR* const excludePointer = ((UCHAR*)page + excludeOffset);
@ -5006,7 +4989,7 @@ static void generate_jump_nodes(thread_db* tdbb, btree_page* page,
*splitIndex = jumpNodes->getCount();
}
// Set new position for generating jumpnode
newAreaPosition += jumpInfo.jumpAreaSize;
newAreaPosition += jumpAreaSize;
*jumpersSize += jumpNode.getJumpNodeSize();
}
}
@ -5217,12 +5200,8 @@ static ULONG insert_node(thread_db* tdbb,
// Initialize variables needed for generating jump information
bool fragmentedOffset = false;
USHORT jumpersOriginalSize = 0;
USHORT jumpersNewSize = 0;
USHORT headerSize = 0;
USHORT newPrefixTotalBySplit = 0;
USHORT splitJumpNodeIndex = 0;
IndexJumpInfo jumpInfo;
jumpNodeList tmpJumpNodes;
jumpNodeList* jumpNodes = &tmpJumpNodes;
@ -5236,15 +5215,16 @@ static ULONG insert_node(thread_db* tdbb,
}
// Get the total size of the jump nodes currently in use.
pointer = IndexJumpInfo::getPointerFirstNode(newBucket, &jumpInfo);
headerSize = (pointer - (UCHAR*)newBucket);
jumpersOriginalSize = jumpInfo.firstNodeOffset - headerSize;
pointer = newBucket->btr_nodes;
const USHORT jumpAreaSize = newBucket->btr_jump_interval;
const USHORT jumpersOriginalSize = newBucket->btr_jump_size;
const UCHAR jumpersOriginalCount = newBucket->btr_jump_count;
// Allow some fragmentation, 10% below or above actual point.
jumpersNewSize = jumpersOriginalSize;
USHORT n = jumpInfo.jumpers;
USHORT jumpersNewSize = jumpersOriginalSize;
UCHAR n = jumpersOriginalCount;
USHORT index = 1;
const USHORT fragmentedThreshold = (jumpInfo.jumpAreaSize / 5);
const USHORT fragmentedThreshold = jumpAreaSize / 5;
IndexJumpNode jumpNode;
while (n)
{
@ -5257,15 +5237,15 @@ static ULONG insert_node(thread_db* tdbb,
if (jumpNode.offset > nodeOffset) {
jumpNode.offset += delta;
}
const USHORT minOffset = headerSize + jumpersOriginalSize +
(index * jumpInfo.jumpAreaSize) - fragmentedThreshold;
const USHORT minOffset = BTR_SIZE + jumpersOriginalSize +
(index * jumpAreaSize) - fragmentedThreshold;
if (jumpNode.offset < minOffset)
{
fragmentedOffset = true;
break;
}
const USHORT maxOffset = headerSize + jumpersOriginalSize +
(index * jumpInfo.jumpAreaSize) + fragmentedThreshold;
const USHORT maxOffset = BTR_SIZE + jumpersOriginalSize +
(index * jumpAreaSize) + fragmentedThreshold;
if (jumpNode.offset > maxOffset)
{
fragmentedOffset = true;
@ -5277,8 +5257,8 @@ static ULONG insert_node(thread_db* tdbb,
}
// Rebuild jump nodes if new node is inserted after last
// jump node offset + jumpAreaSize.
if (nodeOffset >= (headerSize + jumpersOriginalSize +
((jumpInfo.jumpers + 1) * jumpInfo.jumpAreaSize)))
if (nodeOffset >= (BTR_SIZE + jumpersOriginalSize +
((jumpersOriginalCount + 1) * jumpAreaSize)))
{
fragmentedOffset = true;
}
@ -5312,11 +5292,12 @@ static ULONG insert_node(thread_db* tdbb,
// Put all data back into bucket (= window->win_buffer).
// Write jump information header.
jumpInfo.firstNodeOffset = headerSize + jumpersNewSize;
jumpInfo.jumpers = jumpNodes->getCount();
pointer = jumpInfo.writeJumpInfo(bucket);
bucket->btr_jump_interval = jumpAreaSize;
bucket->btr_jump_size = jumpersNewSize;
bucket->btr_jump_count = (UCHAR) jumpNodes->getCount();
// Write jump nodes.
pointer = bucket->btr_nodes;
IndexJumpNode* walkJumpNode = jumpNodes->begin();
for (size_t i = 0; i < jumpNodes->getCount(); i++)
{
@ -5327,10 +5308,10 @@ static ULONG insert_node(thread_db* tdbb,
delete[] walkJumpNode[i].data;
}
}
pointer = (UCHAR*)bucket + jumpInfo.firstNodeOffset;
pointer = bucket->btr_nodes + bucket->btr_jump_size;
// Copy data block.
memcpy(pointer, (UCHAR*)newBucket + headerSize + jumpersOriginalSize,
newBucket->btr_length - (headerSize + jumpersOriginalSize));
memcpy(pointer, newBucket->btr_nodes + jumpersOriginalSize,
newBucket->btr_length - BTR_SIZE - jumpersOriginalSize);
// Update header information.
bucket->btr_prefix_total = newBucket->btr_prefix_total;
@ -5445,16 +5426,16 @@ static ULONG insert_node(thread_db* tdbb,
IndexNode dummyNode = newNode;
dummyNode.setEndBucket();
const USHORT deltaSize = dummyNode.getNodeSize(leafPage) - newNode.getNodeSize(leafPage);
if (endOfPage && ((UCHAR*)splitpoint <= (UCHAR*)newBucket + dbb->dbb_page_size - deltaSize))
if (endOfPage && ((UCHAR*) splitpoint <= (UCHAR*) newBucket + dbb->dbb_page_size - deltaSize))
{
midpoint = splitpoint;
}
else {
midpoint = (UCHAR*)newBucket + ((dbb->dbb_page_size -
(IndexJumpInfo::getPointerFirstNode(newBucket) - (UCHAR*)newBucket)) / 2);
midpoint = (UCHAR*) newBucket +
(dbb->dbb_page_size - BTR_SIZE - newBucket->btr_jump_size) / 2;
}
// Start from the begin of the nodes
splitpoint = IndexJumpInfo::getPointerFirstNode(newBucket);
splitpoint = newBucket->btr_nodes + newBucket->btr_jump_size;
// Copy the bucket up to the midpoint, restructing the full midpoint key
while (splitpoint < midpoint)
{
@ -5497,23 +5478,23 @@ static ULONG insert_node(thread_db* tdbb,
const USHORT firstSplitNodeSize = newNode.getNodeSize(leafPage);
// Format the first node on the overflow page
IndexJumpInfo splitJumpInfo;
splitJumpInfo.firstNodeOffset = headerSize + jumpersSplitSize;
splitJumpInfo.jumpAreaSize = jumpInfo.jumpAreaSize;
split->btr_jump_interval = jumpAreaSize;
split->btr_jump_size = jumpersSplitSize;
if (splitJumpNodeIndex > 0) {
splitJumpInfo.jumpers = jumpNodes->getCount() - splitJumpNodeIndex;
split->btr_jump_count = (UCHAR) (jumpNodes->getCount() - splitJumpNodeIndex);
}
else {
splitJumpInfo.jumpers = 0;
split->btr_jump_count = 0;
}
pointer = splitJumpInfo.writeJumpInfo(split);
pointer = split->btr_nodes;
if (splitJumpNodeIndex > 0)
{
// Write jump nodes to split page.
USHORT index = 1;
// Calculate size that's between header and splitpoint.
const USHORT splitOffset = (splitpoint - (UCHAR*)newBucket);
const USHORT splitOffset = splitpoint - (UCHAR*) newBucket;
IndexJumpNode* walkJumpNode = jumpNodes->begin();
for (size_t i = 0; i < jumpNodes->getCount(); i++, index++)
{
@ -5521,13 +5502,12 @@ static ULONG insert_node(thread_db* tdbb,
{
// Update offset to correct position.
walkJumpNode[i].offset = walkJumpNode[i].offset - splitOffset +
splitJumpInfo.firstNodeOffset + firstSplitNodeSize;
BTR_SIZE + split->btr_jump_size + firstSplitNodeSize;
pointer = walkJumpNode[i].writeJumpNode(pointer);
}
}
}
pointer = (UCHAR*) split + splitJumpInfo.firstNodeOffset;
pointer = split->btr_nodes + split->btr_jump_size;
pointer = newNode.writeNode(pointer, leafPage);
// Copy down the remaining data from scratch page.
@ -5554,34 +5534,37 @@ static ULONG insert_node(thread_db* tdbb,
// overwrite the existing data.
node.setEndBucket();
pointer = node.writeNode(node.nodePointer, leafPage, false);
newBucket->btr_length = pointer - (UCHAR*)newBucket;
newBucket->btr_length = pointer - (UCHAR*) newBucket;
// Write jump information.
jumpInfo.firstNodeOffset = headerSize + jumpersNewSize;
bucket->btr_jump_interval = jumpAreaSize;
bucket->btr_jump_size = jumpersNewSize;
if (splitJumpNodeIndex > 0) {
jumpInfo.jumpers = splitJumpNodeIndex - 1;
bucket->btr_jump_count = (UCHAR) (splitJumpNodeIndex - 1);
}
else {
jumpInfo.jumpers = jumpNodes->getCount();
bucket->btr_jump_count = (UCHAR) jumpNodes->getCount();
}
pointer = jumpInfo.writeJumpInfo(bucket);
pointer = bucket->btr_nodes;
// Write jump nodes.
index = 1;
IndexJumpNode* walkJumpNode = jumpNodes->begin();
for (size_t i = 0; i < jumpNodes->getCount(); i++, index++)
{
if (index <= jumpInfo.jumpers)
if (index <= bucket->btr_jump_count)
{
// Update offset to correct position.
walkJumpNode[i].offset = walkJumpNode[i].offset + jumpersNewSize - jumpersOriginalSize;
pointer = walkJumpNode[i].writeJumpNode(pointer);
}
}
pointer = (UCHAR*)bucket + jumpInfo.firstNodeOffset;
memcpy(pointer, (UCHAR*)newBucket + headerSize + jumpersOriginalSize,
newBucket->btr_length - (headerSize + jumpersOriginalSize));
pointer = bucket->btr_nodes + bucket->btr_jump_size;
memcpy(pointer, newBucket->btr_nodes + jumpersOriginalSize,
newBucket->btr_length - BTR_SIZE - jumpersOriginalSize);
bucket->btr_length = newBucket->btr_length + jumpersNewSize - jumpersOriginalSize;
if (fragmentedOffset)
@ -5893,7 +5876,7 @@ static contents remove_leaf_node(thread_db* tdbb, index_insertion* insertion, WI
++pages;
page = (btree_page*) CCH_HANDOFF(tdbb, window, page->btr_sibling, LCK_write, pag_index);
pointer = IndexJumpInfo::getPointerFirstNode(page);
pointer = page->btr_nodes + page->btr_jump_size;
pointer = node.readNode(pointer, true);
const USHORT len = node.length;
if (len != key->key_length)

3
src/jrd/btr.h
View File

@ -213,9 +213,6 @@ const int irb_descending = 16; // Base index uses descending order
const int irb_exclude_lower = 32; // exclude lower bound keys while scanning index
const int irb_exclude_upper = 64; // exclude upper bound keys while scanning index
// macros used to manipulate btree nodes
#define BTR_SIZE OFFSETA(Ods::btree_page*, btr_nodes)
typedef Firebird::HalfStaticArray<float, 4> SelectivityList;
class BtrPageGCLock : public Lock

5
src/jrd/ods.h
View File

@ -245,9 +245,14 @@ struct btree_page
USHORT btr_length; // length of data in bucket
UCHAR btr_id; // index id for consistency
UCHAR btr_level; // index level (0 = leaf)
USHORT btr_jump_interval; // interval between jump nodes
USHORT btr_jump_size; // size of the jump table
UCHAR btr_jump_count; // number of jump nodes
UCHAR btr_nodes[1];
};
#define BTR_SIZE OFFSETA(Ods::btree_page*, btr_nodes)
// pag_flags
//const UCHAR btr_dont_gc = 1; // Don't garbage-collect this page
//const UCHAR btr_descending = 2; // Page/bucket is part of a descending index

8
src/jrd/recsrc/IndexTableScan.cpp
View File

@ -167,7 +167,7 @@ bool IndexTableScan::getRecord(thread_db* tdbb) const
if (node.isEndBucket)
{
page = (Ods::btree_page*) CCH_HANDOFF(tdbb, &window, page->btr_sibling, LCK_read, pag_index);
nextPointer = IndexJumpInfo::getPointerFirstNode(page);
nextPointer = page->btr_nodes + page->btr_jump_size;
continue;
}
@ -399,7 +399,7 @@ bool IndexTableScan::findSavedNode(thread_db* tdbb, Impure* impure, win* window,
IndexNode node;
while (true)
{
UCHAR* pointer = IndexJumpInfo::getPointerFirstNode(page);
UCHAR* pointer = page->btr_nodes + page->btr_jump_size;
const UCHAR* const endPointer = ((UCHAR*) page + page->btr_length);
while (pointer < endPointer)
{
@ -489,7 +489,7 @@ UCHAR* IndexTableScan::getPosition(thread_db* tdbb, Impure* impure, win* window)
return found ? node.readNode(pointer, true) : pointer;
}
return IndexJumpInfo::getPointerFirstNode(page);
return page->btr_nodes + page->btr_jump_size;
}
UCHAR* IndexTableScan::openStream(thread_db* tdbb, Impure* impure, win* window) const
@ -545,7 +545,7 @@ UCHAR* IndexTableScan::openStream(thread_db* tdbb, Impure* impure, win* window)
return pointer;
}
return IndexJumpInfo::getPointerFirstNode(page);
return page->btr_nodes + page->btr_jump_size;
}
void IndexTableScan::setPage(thread_db* tdbb, Impure* impure, win* window) const

19
src/jrd/validation.cpp
View File

@ -1489,7 +1489,6 @@ RTN Vdr::walk_index(thread_db* tdbb, bool validate, jrd_rel* relation,
bool nullKeyNode = false; // current node is a null key of unique index
bool nullKeyHandled = !(unique && null_key); // null key of unique index was handled
UCHAR* pointer;
IndexNode node, lastNode;
PageBitmap visited_pages; // used to check circular page references, Diane Downie 2007-02-09
@ -1512,18 +1511,15 @@ RTN Vdr::walk_index(thread_db* tdbb, bool validate, jrd_rel* relation,
return rtn_corrupt;
}
IndexJumpInfo jumpInfo;
pointer = IndexJumpInfo::getPointerFirstNode(page, &jumpInfo);
const USHORT headerSize = (pointer - (UCHAR*)page);
UCHAR* pointer = page->btr_nodes;
// Check if firstNodeOffset is not out of page area.
if ((jumpInfo.firstNodeOffset < headerSize) ||
(jumpInfo.firstNodeOffset > page->btr_length))
if (BTR_SIZE + page->btr_jump_size > page->btr_length)
{
corrupt(tdbb, validate, VAL_INDEX_PAGE_CORRUPT, relation,
id + 1, next, page->btr_level, pointer - (UCHAR*) page, __FILE__, __LINE__);
}
USHORT n = jumpInfo.jumpers;
UCHAR n = page->btr_jump_count;
USHORT jumpersSize = 0;
IndexNode checknode;
IndexJumpNode jumpNode;
@ -1532,7 +1528,7 @@ RTN Vdr::walk_index(thread_db* tdbb, bool validate, jrd_rel* relation,
pointer = jumpNode.readJumpNode(pointer);
jumpersSize += jumpNode.getJumpNodeSize();
// Check if jump node offset is inside page.
if ((jumpNode.offset < jumpInfo.firstNodeOffset) ||
if ((jumpNode.offset < BTR_SIZE + page->btr_jump_size) ||
(jumpNode.offset > page->btr_length))
{
corrupt(tdbb, validate, VAL_INDEX_PAGE_CORRUPT, relation,
@ -1552,7 +1548,7 @@ RTN Vdr::walk_index(thread_db* tdbb, bool validate, jrd_rel* relation,
}
// go through all the nodes on the page and check for validity
pointer = IndexJumpInfo::getPointerFirstNode(page);
pointer = page->btr_nodes + page->btr_jump_size;
if (firstNode)
lastNode.readNode(pointer, leafPage);
@ -1650,7 +1646,7 @@ RTN Vdr::walk_index(thread_db* tdbb, bool validate, jrd_rel* relation,
const bool downLeafPage = (down_page->btr_level == 0);
// make sure the initial key is greater than the pointer key
UCHAR* downPointer = IndexJumpInfo::getPointerFirstNode(down_page);
UCHAR* downPointer = down_page->btr_nodes + down_page->btr_jump_size;
IndexNode downNode;
downPointer = downNode.readNode(downPointer, downLeafPage);
@ -1728,7 +1724,8 @@ RTN Vdr::walk_index(thread_db* tdbb, bool validate, jrd_rel* relation,
if (page->btr_level)
{
IndexNode newPageNode;
newPageNode.readNode(IndexJumpInfo::getPointerFirstNode(page), false);
pointer = page->btr_nodes + page->btr_jump_size;
newPageNode.readNode(pointer, false);
down = newPageNode.pageNumber;
}
else