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Generalize the indexCellCompare() so that works on any index page, not just

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the current page that a cursor is pointing to.

FossilOrigin-Name: b305a7f5db183d8e0e5d62ca3c9c6260ad94bb954f7342bd3caabcd8308a21f5
This commit is contained in:
drh
2025-06-19 19:33:06 +00:00
parent 92d1bec584
commit 397b82cf0f
3 changed files with 14 additions and 14 deletions
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11
src/btree.c
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@@ -5882,8 +5882,8 @@ moveto_table_finish:
}
/*
** Compare the "idx"-th cell on the page the cursor pCur is currently
** pointing to to pIdxKey using xRecordCompare. Return negative or
** Compare the "idx"-th cell on the page pPage against the key
** pointing to by pIdxKey using xRecordCompare. Return negative or
** zero if the cell is less than or equal pIdxKey. Return positive
** if unknown.
**
@@ -5898,12 +5898,11 @@ moveto_table_finish:
** a positive value as that will cause the optimization to be skipped.
*/
static int indexCellCompare(
BtCursor *pCur,
MemPage *pPage,
int idx,
UnpackedRecord *pIdxKey,
RecordCompare xRecordCompare
){
MemPage *pPage = pCur->pPage;
int c;
int nCell; /* Size of the pCell cell in bytes */
u8 *pCell = findCellPastPtr(pPage, idx);
@@ -6012,14 +6011,14 @@ int sqlite3BtreeIndexMoveto(
){
int c;
if( pCur->ix==pCur->pPage->nCell-1
&& (c = indexCellCompare(pCur, pCur->ix, pIdxKey, xRecordCompare))<=0
&& (c = indexCellCompare(pCur->pPage,pCur->ix,pIdxKey,xRecordCompare))<=0
&& pIdxKey->errCode==SQLITE_OK
){
*pRes = c;
return SQLITE_OK; /* Cursor already pointing at the correct spot */
}
if( pCur->iPage>0
&& indexCellCompare(pCur, 0, pIdxKey, xRecordCompare)<=0
&& indexCellCompare(pCur->pPage, 0, pIdxKey, xRecordCompare)<=0
&& pIdxKey->errCode==SQLITE_OK
){
pCur->curFlags &= ~(BTCF_ValidOvfl|BTCF_AtLast);