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Experimental changes to fts4 to try to selectively avoid loading very large doclists.

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FossilOrigin-Name: 5ae0ba447a561e3b6637b52f9b83a9fc683d2572
This commit is contained in:
dan
2010-10-19 14:07:59 +00:00
parent 075ed30a9f
commit 4f7c5e684a
13 changed files with 1571 additions and 337 deletions
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6
ext/fts3/fts3_expr.c
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@ -223,7 +223,7 @@ static int getNextString(
rc = pModule->xNext(pCursor, &zToken, &nToken, &iBegin, &iEnd, &iPos);
if( rc==SQLITE_OK ){
int nByte = sizeof(Fts3Expr) + sizeof(Fts3Phrase);
p = fts3ReallocOrFree(p, nByte+ii*sizeof(struct PhraseToken));
p = fts3ReallocOrFree(p, nByte+ii*sizeof(Fts3PhraseToken));
zTemp = fts3ReallocOrFree(zTemp, nTemp + nToken);
if( !p || !zTemp ){
goto no_mem;
@ -235,6 +235,8 @@ static int getNextString(
p->pPhrase = (Fts3Phrase *)&p[1];
p->pPhrase->nToken = ii+1;
p->pPhrase->aToken[ii].n = nToken;
p->pPhrase->aToken[ii].pDeferred = 0;
p->pPhrase->aToken[ii].pArray = 0;
memcpy(&zTemp[nTemp], zToken, nToken);
nTemp += nToken;
if( iEnd<nInput && zInput[iEnd]=='*' ){
@ -254,7 +256,7 @@ static int getNextString(
char *zNew = NULL;
int nNew = 0;
int nByte = sizeof(Fts3Expr) + sizeof(Fts3Phrase);
nByte += (p?(p->pPhrase->nToken-1):0) * sizeof(struct PhraseToken);
nByte += (p?(p->pPhrase->nToken-1):0) * sizeof(Fts3PhraseToken);
p = fts3ReallocOrFree(p, nByte + nTemp);
if( !p ){
goto no_mem;