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Overview
| Comment: | Minor enhancements to the auxiliary information added to EXPLAIN output with SQLITE_EXPLAIN_ENABLE_COMMENTS. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
0d1328e33ca761eddcf8a50e8e83c997 |
| User & Date: | drh 2013-11-12 20:18:14 |
Context
|
2013-11-12
| ||
| 21:10 | Fix harmless compiler warning. check-in: ddacd101 user: mistachkin tags: trunk | |
| 20:18 | Minor enhancements to the auxiliary information added to EXPLAIN output with SQLITE_EXPLAIN_ENABLE_COMMENTS. check-in: 0d1328e3 user: drh tags: trunk | |
| 18:37 | Break out the structure and macro definitions of where.c into a separate header file whereInt.h for easier editing and debugging. check-in: c4446712 user: drh tags: trunk | |
Changes
Changes to src/vdbeaux.c.
978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 |
zTemp[i++] = ')';
zTemp[i] = 0;
assert( i<nTemp );
break;
}
case P4_COLLSEQ: {
CollSeq *pColl = pOp->p4.pColl;
sqlite3_snprintf(nTemp, zTemp, "collseq(%.20s)", pColl->zName);
break;
}
case P4_FUNCDEF: {
FuncDef *pDef = pOp->p4.pFunc;
sqlite3_snprintf(nTemp, zTemp, "%s(%d)", pDef->zName, pDef->nArg);
break;
}
|
| |
978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 |
zTemp[i++] = ')';
zTemp[i] = 0;
assert( i<nTemp );
break;
}
case P4_COLLSEQ: {
CollSeq *pColl = pOp->p4.pColl;
sqlite3_snprintf(nTemp, zTemp, "(%.20s)", pColl->zName);
break;
}
case P4_FUNCDEF: {
FuncDef *pDef = pOp->p4.pFunc;
sqlite3_snprintf(nTemp, zTemp, "%s(%d)", pDef->zName, pDef->nArg);
break;
}
|
Changes to src/where.c.
2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 .... 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 .... 5701 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713 5714 .... 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 |
pLoop = pLevel->pWLoop;
pTabItem = &pWInfo->pTabList->a[pLevel->iFrom];
iCur = pTabItem->iCursor;
pLevel->notReady = notReady & ~getMask(&pWInfo->sMaskSet, iCur);
bRev = (pWInfo->revMask>>iLevel)&1;
omitTable = (pLoop->wsFlags & WHERE_IDX_ONLY)!=0
&& (pWInfo->wctrlFlags & WHERE_FORCE_TABLE)==0;
VdbeNoopComment((v, "Begin WHERE-Loop %d: %s", iLevel,pTabItem->pTab->zName));
/* Create labels for the "break" and "continue" instructions
** for the current loop. Jump to addrBrk to break out of a loop.
** Jump to cont to go immediately to the next iteration of the
** loop.
**
** When there is an IN operator, we also have a "addrNxt" label that
................................................................................
explainOneScan(pParse, pTabList, pLevel, ii, pLevel->iFrom, wctrlFlags);
pLevel->addrBody = sqlite3VdbeCurrentAddr(v);
notReady = codeOneLoopStart(pWInfo, ii, notReady);
pWInfo->iContinue = pLevel->addrCont;
}
/* Done. */
return pWInfo;
/* Jump here if malloc fails */
whereBeginError:
if( pWInfo ){
pParse->nQueryLoop = pWInfo->savedNQueryLoop;
whereInfoFree(db, pWInfo);
................................................................................
WhereLevel *pLevel;
WhereLoop *pLoop;
SrcList *pTabList = pWInfo->pTabList;
sqlite3 *db = pParse->db;
/* Generate loop termination code.
*/
sqlite3ExprCacheClear(pParse);
for(i=pWInfo->nLevel-1; i>=0; i--){
pLevel = &pWInfo->a[i];
pLoop = pLevel->pWLoop;
sqlite3VdbeResolveLabel(v, pLevel->addrCont);
if( pLevel->op!=OP_Noop ){
sqlite3VdbeAddOp2(v, pLevel->op, pLevel->p1, pLevel->p2);
................................................................................
if( pLevel->op==OP_Return ){
sqlite3VdbeAddOp2(v, OP_Gosub, pLevel->p1, pLevel->addrFirst);
}else{
sqlite3VdbeAddOp2(v, OP_Goto, 0, pLevel->addrFirst);
}
sqlite3VdbeJumpHere(v, addr);
}
VdbeNoopComment((v, "End WHERE-Loop %d: %s", i,
pWInfo->pTabList->a[pLevel->iFrom].pTab->zName));
}
/* The "break" point is here, just past the end of the outer loop.
** Set it.
*/
sqlite3VdbeResolveLabel(v, pWInfo->iBreak);
|
| > > | |
2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 .... 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 5689 .... 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713 5714 5715 5716 .... 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 |
pLoop = pLevel->pWLoop;
pTabItem = &pWInfo->pTabList->a[pLevel->iFrom];
iCur = pTabItem->iCursor;
pLevel->notReady = notReady & ~getMask(&pWInfo->sMaskSet, iCur);
bRev = (pWInfo->revMask>>iLevel)&1;
omitTable = (pLoop->wsFlags & WHERE_IDX_ONLY)!=0
&& (pWInfo->wctrlFlags & WHERE_FORCE_TABLE)==0;
VdbeNoopComment((v, "Begin WHERE-loop%d: %s",iLevel,pTabItem->pTab->zName));
/* Create labels for the "break" and "continue" instructions
** for the current loop. Jump to addrBrk to break out of a loop.
** Jump to cont to go immediately to the next iteration of the
** loop.
**
** When there is an IN operator, we also have a "addrNxt" label that
................................................................................
explainOneScan(pParse, pTabList, pLevel, ii, pLevel->iFrom, wctrlFlags);
pLevel->addrBody = sqlite3VdbeCurrentAddr(v);
notReady = codeOneLoopStart(pWInfo, ii, notReady);
pWInfo->iContinue = pLevel->addrCont;
}
/* Done. */
VdbeNoopComment((v, "Begin WHERE-core"));
return pWInfo;
/* Jump here if malloc fails */
whereBeginError:
if( pWInfo ){
pParse->nQueryLoop = pWInfo->savedNQueryLoop;
whereInfoFree(db, pWInfo);
................................................................................
WhereLevel *pLevel;
WhereLoop *pLoop;
SrcList *pTabList = pWInfo->pTabList;
sqlite3 *db = pParse->db;
/* Generate loop termination code.
*/
VdbeNoopComment((v, "End WHERE-core"));
sqlite3ExprCacheClear(pParse);
for(i=pWInfo->nLevel-1; i>=0; i--){
pLevel = &pWInfo->a[i];
pLoop = pLevel->pWLoop;
sqlite3VdbeResolveLabel(v, pLevel->addrCont);
if( pLevel->op!=OP_Noop ){
sqlite3VdbeAddOp2(v, pLevel->op, pLevel->p1, pLevel->p2);
................................................................................
if( pLevel->op==OP_Return ){
sqlite3VdbeAddOp2(v, OP_Gosub, pLevel->p1, pLevel->addrFirst);
}else{
sqlite3VdbeAddOp2(v, OP_Goto, 0, pLevel->addrFirst);
}
sqlite3VdbeJumpHere(v, addr);
}
VdbeNoopComment((v, "End WHERE-loop%d: %s", i,
pWInfo->pTabList->a[pLevel->iFrom].pTab->zName));
}
/* The "break" point is here, just past the end of the outer loop.
** Set it.
*/
sqlite3VdbeResolveLabel(v, pWInfo->iBreak);
|
Changes to src/whereInt.h.
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 |
u8 iTab; /* Position in FROM clause of table for this loop */
u8 iSortIdx; /* Sorting index number. 0==None */
LogEst rSetup; /* One-time setup cost (ex: create transient index) */
LogEst rRun; /* Cost of running each loop */
LogEst nOut; /* Estimated number of output rows */
union {
struct { /* Information for internal btree tables */
int nEq; /* Number of equality constraints */
Index *pIndex; /* Index used, or NULL */
} btree;
struct { /* Information for virtual tables */
int idxNum; /* Index number */
u8 needFree; /* True if sqlite3_free(idxStr) is needed */
u8 isOrdered; /* True if satisfies ORDER BY */
u16 omitMask; /* Terms that may be omitted */
|
| > |
109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 |
u8 iTab; /* Position in FROM clause of table for this loop */
u8 iSortIdx; /* Sorting index number. 0==None */
LogEst rSetup; /* One-time setup cost (ex: create transient index) */
LogEst rRun; /* Cost of running each loop */
LogEst nOut; /* Estimated number of output rows */
union {
struct { /* Information for internal btree tables */
u16 nEq; /* Number of equality constraints */
u16 nSkip; /* Number of initial index columns to skip */
Index *pIndex; /* Index used, or NULL */
} btree;
struct { /* Information for virtual tables */
int idxNum; /* Index number */
u8 needFree; /* True if sqlite3_free(idxStr) is needed */
u8 isOrdered; /* True if satisfies ORDER BY */
u16 omitMask; /* Terms that may be omitted */
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