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Overview
| Comment: | Prevent the WhereLoop.rSetup cost estimate from going negative on complex queries. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
f81050859170c8708a1b296da8dd3ef0 |
| User & Date: | drh 2016-06-26 04:06:28 |
Context
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2016-07-01
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| 20:12 | Fix the transitive constraint logic error that can result in a null pointer dereference. Fix for ticket [e8d439c77685eca6]. (check-in: 228a7879 user: drh tags: trunk) | |
| 12:39 | Add the sqlite3rbu_state() API. Used to determine the current state (creating OAL, ready to move OAL, incremental-checkpoint, finished or error) of an RBU operation. (Closed-Leaf check-in: 92e7df0f user: dan tags: rbu-state-api) | |
|
2016-06-29
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| 05:00 | Add a prototype intarray($PTR,$N) table valued function. (check-in: 233b3338 user: drh tags: prototype-int-array) | |
|
2016-06-28
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| 22:27 | Proposed fix for a problem in the query planner. (check-in: a33d2356 user: drh tags: planner-fix) | |
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2016-06-26
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| 04:06 | Prevent the WhereLoop.rSetup cost estimate from going negative on complex queries. (check-in: f8105085 user: drh tags: trunk) | |
|
2016-06-25
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| 11:43 | Fix the handling of OP_Eq opcodes that compare a register against itself and that require an affinity change. (check-in: 507014e4 user: drh tags: trunk) | |
Changes
Changes to src/where.c.
| ︙ | ︙ | |||
2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 |
** those objects, since there is no opportunity to add schema
** indexes on subqueries and views. */
pNew->rSetup = rLogSize + rSize + 4;
if( pTab->pSelect==0 && (pTab->tabFlags & TF_Ephemeral)==0 ){
pNew->rSetup += 24;
}
ApplyCostMultiplier(pNew->rSetup, pTab->costMult);
/* TUNING: Each index lookup yields 20 rows in the table. This
** is more than the usual guess of 10 rows, since we have no way
** of knowing how selective the index will ultimately be. It would
** not be unreasonable to make this value much larger. */
pNew->nOut = 43; assert( 43==sqlite3LogEst(20) );
pNew->rRun = sqlite3LogEstAdd(rLogSize,pNew->nOut);
pNew->wsFlags = WHERE_AUTO_INDEX;
| > | 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 |
** those objects, since there is no opportunity to add schema
** indexes on subqueries and views. */
pNew->rSetup = rLogSize + rSize + 4;
if( pTab->pSelect==0 && (pTab->tabFlags & TF_Ephemeral)==0 ){
pNew->rSetup += 24;
}
ApplyCostMultiplier(pNew->rSetup, pTab->costMult);
if( pNew->rSetup<0 ) pNew->rSetup = 0;
/* TUNING: Each index lookup yields 20 rows in the table. This
** is more than the usual guess of 10 rows, since we have no way
** of knowing how selective the index will ultimately be. It would
** not be unreasonable to make this value much larger. */
pNew->nOut = 43; assert( 43==sqlite3LogEst(20) );
pNew->rRun = sqlite3LogEstAdd(rLogSize,pNew->nOut);
pNew->wsFlags = WHERE_AUTO_INDEX;
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| ︙ | ︙ |