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Experimental attempt to make better use of covering indexes within OR queries.

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FossilOrigin-Name: a323ac3a9d42bd5cb38d724c7e1180584b91054c
This commit is contained in:
dan
2016-01-29 19:29:45 +00:00
parent 65875f37bc
commit de892d9660
7 changed files with 121 additions and 22 deletions
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8
src/vdbeaux.c
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@@ -3008,9 +3008,15 @@ int sqlite3VdbeCursorRestore(VdbeCursor *p){
** If the cursor is already pointing to the correct row and that row has
** not been deleted out from under the cursor, then this routine is a no-op.
*/
int sqlite3VdbeCursorMoveto(VdbeCursor *p){
int sqlite3VdbeCursorMoveto(VdbeCursor **pp, int *piCol){
VdbeCursor *p = *pp;
if( p->eCurType==CURTYPE_BTREE ){
if( p->deferredMoveto ){
if( p->aAltMap && p->aAltMap[*piCol] ){
*pp = p->pAltCursor;
*piCol = p->aAltMap[*piCol] - 1;
return SQLITE_OK;
}
return handleDeferredMoveto(p);
}
if( sqlite3BtreeCursorHasMoved(p->uc.pCursor) ){