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New enhancements to .wheretrace. The 0x20000 flag shows the WHERE clause

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before and after coding each loop.  The 0x800 flag shows status at the start
and at the end of each loop.  An extra "C" tag is shown on coded terms.

FossilOrigin-Name: 59cc46e5a6d8dbb030f27716ad5446ecccf81cf0cfff95338b9133777f2059e7
This commit is contained in:
drh
2019-12-28 14:07:22 +00:00
parent cacdf20771
commit 118efd1626
4 changed files with 48 additions and 15 deletions
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31
src/wherecode.c
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@@ -1284,6 +1284,17 @@ Bitmask sqlite3WhereCodeOneLoopStart(
pLevel->notReady = notReady & ~sqlite3WhereGetMask(&pWInfo->sMaskSet, iCur);
bRev = (pWInfo->revMask>>iLevel)&1;
VdbeModuleComment((v, "Begin WHERE-loop%d: %s",iLevel,pTabItem->pTab->zName));
#if WHERETRACE_ENABLED /* 0x20800 */
if( sqlite3WhereTrace & 0x800 ){
sqlite3DebugPrintf("Coding level %d: notReady=%llx\n",
iLevel, (u64)notReady);
sqlite3WhereLoopPrint(pLoop, pWC);
}
if( sqlite3WhereTrace & 0x20000 ){
sqlite3DebugPrintf("Complete WHERE clause before coding:\n");
sqlite3WhereClausePrint(pWC);
}
#endif
/* Create labels for the "break" and "continue" instructions
** for the current loop. Jump to addrBrk to break out of a loop.
@@ -2339,6 +2350,10 @@ Bitmask sqlite3WhereCodeOneLoopStart(
VdbeNoopComment((v, "WhereTerm[%d] (%p) priority=%d",
pWC->nTerm-j, pTerm, iLoop));
}
if( sqlite3WhereTrace & 0x800 ){
sqlite3DebugPrintf("Coding auxiliary constraint:\n");
sqlite3WhereTermPrint(pTerm, pWC->nTerm-j);
}
#endif
sqlite3ExprIfFalse(pParse, pE, addrCont, SQLITE_JUMPIFNULL);
if( skipLikeAddr ) sqlite3VdbeJumpHere(v, skipLikeAddr);
@@ -2365,6 +2380,12 @@ Bitmask sqlite3WhereCodeOneLoopStart(
if( pLevel->iLeftJoin ) continue;
pE = pTerm->pExpr;
assert( !ExprHasProperty(pE, EP_FromJoin) );
#ifdef WHERETRACE_ENABLED /* 0x800 */
if( sqlite3WhereTrace & 0x800 ){
sqlite3DebugPrintf("Coding transitive constraint:\n");
sqlite3WhereTermPrint(pTerm, pWC->nTerm-j);
}
#endif
assert( (pTerm->prereqRight & pLevel->notReady)!=0 );
pAlt = sqlite3WhereFindTerm(pWC, iCur, pTerm->u.leftColumn, notReady,
WO_EQ|WO_IN|WO_IS, 0);
@@ -2406,5 +2427,15 @@ Bitmask sqlite3WhereCodeOneLoopStart(
}
}
#if WHERETRACE_ENABLED /* 0x20800 */
if( sqlite3WhereTrace & 0x20000 ){
sqlite3DebugPrintf("Complete WHERE clause after coding level %d:\n",iLevel);
sqlite3WhereClausePrint(pWC);
}
if( sqlite3WhereTrace & 0x800 ){
sqlite3DebugPrintf("End Coding level %d: notReady=%llx\n",
iLevel, (u64)pLevel->notReady);
}
#endif
return pLevel->notReady;
}