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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_snippet.c
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@ -24,7 +24,7 @@
*/
typedef struct LoadDoclistCtx LoadDoclistCtx;
struct LoadDoclistCtx {
Fts3Table *pTab; /* FTS3 Table */
Fts3Cursor *pCsr; /* FTS3 Cursor */
int nPhrase; /* Number of phrases seen so far */
int nToken; /* Number of tokens seen so far */
};
@ -218,7 +218,7 @@ static int fts3ExprLoadDoclistsCb1(Fts3Expr *pExpr, int iPhrase, void *ctx){
p->nToken += pExpr->pPhrase->nToken;
if( pExpr->isLoaded==0 ){
rc = sqlite3Fts3ExprLoadDoclist(p->pTab, pExpr);
rc = sqlite3Fts3ExprLoadDoclist(p->pCsr, pExpr);
pExpr->isLoaded = 1;
if( rc==SQLITE_OK ){
rc = fts3ExprNearTrim(pExpr);
@ -261,7 +261,7 @@ static int fts3ExprLoadDoclists(
){
int rc; /* Return Code */
LoadDoclistCtx sCtx = {0,0,0}; /* Context for fts3ExprIterate() */
sCtx.pTab = (Fts3Table *)pCsr->base.pVtab;
sCtx.pCsr = pCsr;
rc = fts3ExprIterate(pCsr->pExpr, fts3ExprLoadDoclistsCb1, (void *)&sCtx);
if( rc==SQLITE_OK ){
(void)fts3ExprIterate(pCsr->pExpr, fts3ExprLoadDoclistsCb2, 0);