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Overview
| Comment: | Change fts5 expression processing to avoid linear scans of long doclists caused by phrases that match specific columns only. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | fts5 |
| Files: | files | file ages | folders |
| SHA1: |
ec69e09a55b4daf1c40aeaaf9ee95091 |
| User & Date: | dan 2015-06-01 09:15:20 |
References
|
2015-06-02
| ||
| 17:57 | Reimplement [ec69e09a] so that each call to the xNext() method does not involve two iterations of the match expression tree (only one). (check-in: 80fe305b user: dan tags: fts5) | |
Context
|
2015-06-01
| ||
| 19:17 | Improve performance of the fts5 AND operator. (check-in: b43e9a5b user: dan tags: fts5) | |
| 09:15 | Change fts5 expression processing to avoid linear scans of long doclists caused by phrases that match specific columns only. (check-in: ec69e09a user: dan tags: fts5) | |
|
2015-05-30
| ||
| 11:49 | Remove the "#include sqlite3Int.h" from fts5Int.h. (check-in: e008c3c8 user: dan tags: fts5) | |
Changes
Changes to ext/fts5/fts5_expr.c.
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** EOF.
*/
static int fts5ExprNearNextRowidMatch(
Fts5Expr *pExpr, /* Expression pPhrase belongs to */
Fts5ExprNode *pNode
){
Fts5ExprNearset *pNear = pNode->pNear;
int rc = SQLITE_OK;
int i, j; /* Phrase and token index, respectively */
i64 iLast; /* Lastest rowid any iterator points to */
int bMatch; /* True if all terms are at the same rowid */
/* Initialize iLast, the "lastest" rowid any iterator points to. If the
** iterator skips through rowids in the default ascending order, this means
** the maximum rowid. Or, if the iterator is "ORDER BY rowid DESC", then it
** means the minimum rowid. */
iLast = sqlite3Fts5IterRowid(pNear->apPhrase[0]->aTerm[0].pIter);
do {
bMatch = 1;
for(i=0; i<pNear->nPhrase; i++){
Fts5ExprPhrase *pPhrase = pNear->apPhrase[i];
for(j=0; j<pPhrase->nTerm; j++){
Fts5IndexIter *pIter = pPhrase->aTerm[j].pIter;
i64 iRowid = sqlite3Fts5IterRowid(pIter);
................................................................................
if( iRowid!=iLast ) bMatch = 0;
if( fts5ExprAdvanceto(pIter, pExpr->bDesc, &iLast, &rc, &pNode->bEof) ){
return rc;
}
}
}
}while( bMatch==0 );
pNode->iRowid = iLast;
return rc;
}
/*
** IN/OUT parameter (*pa) points to a position list n bytes in size. If
................................................................................
if( nSub ){
fts5BufferAppendBlob(&rc, pBuf, nSub, pSub);
}
}
return rc;
}
/*
** Argument pNode points to a NEAR node. All individual term iterators
** point to valid entries (not EOF).
*
** This function tests if the term iterators currently all point to the
** same rowid, and if so, if the row matches the phrase and NEAR constraints.
................................................................................
** otherwise. It is not considered an error code if an iterator reaches
** EOF.
*/
static int fts5ExprNearNextMatch(
Fts5Expr *pExpr, /* Expression that pNear is a part of */
Fts5ExprNode *pNode /* The "NEAR" node (FTS5_STRING) */
){
Fts5ExprNearset *pNear = pNode->pNear;
int rc = SQLITE_OK;
while( 1 ){
if( pNear->nPhrase==1 && pNear->apPhrase[0]->nTerm==1 ){
/* If this "NEAR" object is actually a single phrase that consists
** of a single term only, then grab pointers into the poslist
** managed by the fts5_index.c iterator object. This is much faster
** than synthesizing a new poslist the way we have to for more
** complicated phrase or NEAR expressions. */
Fts5ExprPhrase *pPhrase = pNear->apPhrase[0];
Fts5IndexIter *pIter = pPhrase->aTerm[0].pIter;
Fts5ExprColset *pColset = pNear->pColset;
const u8 *pPos;
int nPos;
rc = sqlite3Fts5IterPoslist(pIter, &pPos, &nPos, &pNode->iRowid);
/* If the term may match any column, then this must be a match.
** Return immediately in this case. Otherwise, try to find the
** part of the poslist that corresponds to the required column.
** If it can be found, return. If it cannot, the next iteration
** of the loop will test the next rowid in the database for this
** term. */
if( pColset==0 ){
assert( pPhrase->poslist.nSpace==0 );
pPhrase->poslist.p = (u8*)pPos;
pPhrase->poslist.n = nPos;
}else if( pColset->nCol==1 ){
assert( pPhrase->poslist.nSpace==0 );
pPhrase->poslist.n = fts5ExprExtractCol(&pPos, nPos, pColset->aiCol[0]);
pPhrase->poslist.p = (u8*)pPos;
}else if( rc==SQLITE_OK ){
rc = fts5ExprExtractColset(pColset, pPos, nPos, &pPhrase->poslist);
}
if( pPhrase->poslist.n ) return rc;
}else{
int i;
/* Advance the iterators until they all point to the same rowid */
rc = fts5ExprNearNextRowidMatch(pExpr, pNode);
if( rc!=SQLITE_OK || pNode->bEof ) break;
/* Check that each phrase in the nearset matches the current row.
** Populate the pPhrase->poslist buffers at the same time. If any
** phrase is not a match, break out of the loop early. */
for(i=0; rc==SQLITE_OK && i<pNear->nPhrase; i++){
Fts5ExprPhrase *pPhrase = pNear->apPhrase[i];
if( pPhrase->nTerm>1 || pNear->pColset ){
int bMatch = 0;
rc = fts5ExprPhraseIsMatch(pExpr, pNear->pColset, pPhrase, &bMatch);
if( bMatch==0 ) break;
}else{
rc = sqlite3Fts5IterPoslistBuffer(
pPhrase->aTerm[0].pIter, &pPhrase->poslist
);
}
}
if( i==pNear->nPhrase ){
if( i==1 ) break;
if( fts5ExprNearIsMatch(&rc, pNear) ) break;
}
}
/* If control flows to here, then the current rowid is not a match.
** Advance all term iterators in all phrases to the next rowid. */
if( rc==SQLITE_OK ){
rc = fts5ExprNearAdvanceFirst(pExpr, pNode, 0, 0);
}
if( pNode->bEof || rc!=SQLITE_OK ) break;
................................................................................
switch( pNode->eType ){
case FTS5_STRING: {
rc = fts5ExprNearAdvanceFirst(pExpr, pNode, bFromValid, iFrom);
break;
};
case FTS5_AND: {
rc = fts5ExprNodeNext(pExpr, pNode->pLeft, bFromValid, iFrom);
if( rc==SQLITE_OK ){
/* todo: update (iFrom/bFromValid) here */
rc = fts5ExprNodeNext(pExpr, pNode->pRight, bFromValid, iFrom);
}
break;
}
case FTS5_OR: {
Fts5ExprNode *p1 = pNode->pLeft;
Fts5ExprNode *p2 = pNode->pRight;
................................................................................
|| rc!=SQLITE_OK /* a */
|| pNode->bEof /* b */
|| pNode->iRowid==iFrom || pExpr->bDesc==(pNode->iRowid<iFrom) /* c */
);
return rc;
}
static void fts5ExprSetEof(Fts5ExprNode *pNode){
if( pNode ){
pNode->bEof = 1;
fts5ExprSetEof(pNode->pLeft);
fts5ExprSetEof(pNode->pRight);
}
................................................................................
Fts5ExprNode *pNode /* Expression node to test */
){
int rc = SQLITE_OK;
if( pNode->bEof==0 ){
switch( pNode->eType ){
case FTS5_STRING: {
rc = fts5ExprNearNextMatch(pExpr, pNode);
break;
}
case FTS5_AND: {
Fts5ExprNode *p1 = pNode->pLeft;
Fts5ExprNode *p2 = pNode->pRight;
................................................................................
while( rc==SQLITE_OK && p1->bEof==0 ){
int cmp = fts5NodeCompare(pExpr, p1, p2);
if( cmp>0 ){
rc = fts5ExprNodeNext(pExpr, p2, 1, p1->iRowid);
cmp = fts5NodeCompare(pExpr, p1, p2);
}
assert( rc!=SQLITE_OK || cmp<=0 );
if( rc || cmp<0 ) break;
rc = fts5ExprNodeNext(pExpr, p1, 0, 0);
}
pNode->bEof = p1->bEof;
pNode->iRowid = p1->iRowid;
break;
}
}
................................................................................
if( pNode->eType==FTS5_STRING ){
/* Initialize all term iterators in the NEAR object. */
rc = fts5ExprNearInitAll(pExpr, pNode);
/* Attempt to advance to the first match */
if( rc==SQLITE_OK && pNode->bEof==0 ){
rc = fts5ExprNearNextMatch(pExpr, pNode);
}
}else{
rc = fts5ExprNodeFirst(pExpr, pNode->pLeft);
if( rc==SQLITE_OK ){
rc = fts5ExprNodeFirst(pExpr, pNode->pRight);
}
................................................................................
rc = fts5ExprNodeNextMatch(pExpr, pNode);
}
}
return rc;
}
/*
** Begin iterating through the set of documents in index pIdx matched by
** the MATCH expression passed as the first argument. If the "bDesc" parameter
** is passed a non-zero value, iteration is in descending rowid order. Or,
** if it is zero, in ascending order.
**
** Return SQLITE_OK if successful, or an SQLite error code otherwise. It
** is not considered an error if the query does not match any documents.
*/
int sqlite3Fts5ExprFirst(Fts5Expr *p, Fts5Index *pIdx, int bDesc){
int rc = SQLITE_OK;
if( p->pRoot ){
p->pIndex = pIdx;
p->bDesc = bDesc;
rc = fts5ExprNodeFirst(p, p->pRoot);
}
return rc;
}
/*
** Move to the next document
**
** Return SQLITE_OK if successful, or an SQLite error code otherwise. It
** is not considered an error if the query does not match any documents.
*/
int sqlite3Fts5ExprNext(Fts5Expr *p){
int rc;
rc = fts5ExprNodeNext(p, p->pRoot, 0, 0);
return rc;
}
int sqlite3Fts5ExprEof(Fts5Expr *p){
return (p->pRoot==0 || p->pRoot->bEof);
}
|
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** EOF.
*/
static int fts5ExprNearNextRowidMatch(
Fts5Expr *pExpr, /* Expression pPhrase belongs to */
Fts5ExprNode *pNode
){
Fts5ExprNearset *pNear = pNode->pNear;
i64 iLast; /* Lastest rowid any iterator points to */
int rc = SQLITE_OK;
/* Initialize iLast, the "lastest" rowid any iterator points to. If the
** iterator skips through rowids in the default ascending order, this means
** the maximum rowid. Or, if the iterator is "ORDER BY rowid DESC", then it
** means the minimum rowid. */
iLast = sqlite3Fts5IterRowid(pNear->apPhrase[0]->aTerm[0].pIter);
if( pNear->nPhrase>1 || pNear->apPhrase[0]->nTerm>1 ){
int i, j; /* Phrase and token index, respectively */
int bMatch; /* True if all terms are at the same rowid */
do {
bMatch = 1;
for(i=0; i<pNear->nPhrase; i++){
Fts5ExprPhrase *pPhrase = pNear->apPhrase[i];
for(j=0; j<pPhrase->nTerm; j++){
Fts5IndexIter *pIter = pPhrase->aTerm[j].pIter;
i64 iRowid = sqlite3Fts5IterRowid(pIter);
................................................................................
if( iRowid!=iLast ) bMatch = 0;
if( fts5ExprAdvanceto(pIter, pExpr->bDesc, &iLast,&rc,&pNode->bEof) ){
return rc;
}
}
}
}while( bMatch==0 );
}
pNode->iRowid = iLast;
return rc;
}
/*
** IN/OUT parameter (*pa) points to a position list n bytes in size. If
................................................................................
if( nSub ){
fts5BufferAppendBlob(&rc, pBuf, nSub, pSub);
}
}
return rc;
}
static int fts5ExprNearTest(
int *pRc,
Fts5Expr *pExpr, /* Expression that pNear is a part of */
Fts5ExprNode *pNode /* The "NEAR" node (FTS5_STRING) */
){
Fts5ExprNearset *pNear = pNode->pNear;
int rc = *pRc;
if( pNear->nPhrase==1 && pNear->apPhrase[0]->nTerm==1 ){
/* If this "NEAR" object is actually a single phrase that consists
** of a single term only, then grab pointers into the poslist
** managed by the fts5_index.c iterator object. This is much faster
** than synthesizing a new poslist the way we have to for more
** complicated phrase or NEAR expressions. */
Fts5ExprPhrase *pPhrase = pNear->apPhrase[0];
Fts5IndexIter *pIter = pPhrase->aTerm[0].pIter;
Fts5ExprColset *pColset = pNear->pColset;
const u8 *pPos;
int nPos;
if( rc!=SQLITE_OK ) return 0;
rc = sqlite3Fts5IterPoslist(pIter, &pPos, &nPos, &pNode->iRowid);
/* If the term may match any column, then this must be a match.
** Return immediately in this case. Otherwise, try to find the
** part of the poslist that corresponds to the required column.
** If it can be found, return. If it cannot, the next iteration
** of the loop will test the next rowid in the database for this
** term. */
if( pColset==0 ){
assert( pPhrase->poslist.nSpace==0 );
pPhrase->poslist.p = (u8*)pPos;
pPhrase->poslist.n = nPos;
}else if( pColset->nCol==1 ){
assert( pPhrase->poslist.nSpace==0 );
pPhrase->poslist.n = fts5ExprExtractCol(&pPos, nPos, pColset->aiCol[0]);
pPhrase->poslist.p = (u8*)pPos;
}else if( rc==SQLITE_OK ){
rc = fts5ExprExtractColset(pColset, pPos, nPos, &pPhrase->poslist);
}
*pRc = rc;
return (pPhrase->poslist.n>0);
}else{
int i;
/* Check that each phrase in the nearset matches the current row.
** Populate the pPhrase->poslist buffers at the same time. If any
** phrase is not a match, break out of the loop early. */
for(i=0; rc==SQLITE_OK && i<pNear->nPhrase; i++){
Fts5ExprPhrase *pPhrase = pNear->apPhrase[i];
if( pPhrase->nTerm>1 || pNear->pColset ){
int bMatch = 0;
rc = fts5ExprPhraseIsMatch(pExpr, pNear->pColset, pPhrase, &bMatch);
if( bMatch==0 ) break;
}else{
rc = sqlite3Fts5IterPoslistBuffer(
pPhrase->aTerm[0].pIter, &pPhrase->poslist
);
}
}
*pRc = rc;
if( i==pNear->nPhrase && (i==1 || fts5ExprNearIsMatch(pRc, pNear)) ){
return 1;
}
}
return 0;
}
/*
** Argument pNode points to a NEAR node. All individual term iterators
** point to valid entries (not EOF).
*
** This function tests if the term iterators currently all point to the
** same rowid, and if so, if the row matches the phrase and NEAR constraints.
................................................................................
** otherwise. It is not considered an error code if an iterator reaches
** EOF.
*/
static int fts5ExprNearNextMatch(
Fts5Expr *pExpr, /* Expression that pNear is a part of */
Fts5ExprNode *pNode /* The "NEAR" node (FTS5_STRING) */
){
int rc = SQLITE_OK;
assert( pNode->pNear );
while( 1 ){
/* Advance the iterators until they all point to the same rowid */
rc = fts5ExprNearNextRowidMatch(pExpr, pNode);
if( rc!=SQLITE_OK || pNode->bEof ) break;
if( fts5ExprNearTest(&rc, pExpr, pNode) ) break;
/* If control flows to here, then the current rowid is not a match.
** Advance all term iterators in all phrases to the next rowid. */
if( rc==SQLITE_OK ){
rc = fts5ExprNearAdvanceFirst(pExpr, pNode, 0, 0);
}
if( pNode->bEof || rc!=SQLITE_OK ) break;
................................................................................
switch( pNode->eType ){
case FTS5_STRING: {
rc = fts5ExprNearAdvanceFirst(pExpr, pNode, bFromValid, iFrom);
break;
};
case FTS5_AND: {
Fts5ExprNode *pLeft = pNode->pLeft;
rc = fts5ExprNodeNext(pExpr, pLeft, bFromValid, iFrom);
if( rc==SQLITE_OK && pLeft->bEof==0 ){
assert( !bFromValid || fts5RowidCmp(pExpr, pLeft->iRowid, iFrom)>=0 );
rc = fts5ExprNodeNext(pExpr, pNode->pRight, 1, pLeft->iRowid);
}
break;
}
case FTS5_OR: {
Fts5ExprNode *p1 = pNode->pLeft;
Fts5ExprNode *p2 = pNode->pRight;
................................................................................
|| rc!=SQLITE_OK /* a */
|| pNode->bEof /* b */
|| pNode->iRowid==iFrom || pExpr->bDesc==(pNode->iRowid<iFrom) /* c */
);
return rc;
}
static void fts5ExprNodeZeroPoslist(Fts5ExprNode *pNode){
if( pNode->eType==FTS5_STRING ){
Fts5ExprNearset *pNear = pNode->pNear;
int i;
for(i=0; i<pNear->nPhrase; i++){
Fts5ExprPhrase *pPhrase = pNear->apPhrase[i];
pPhrase->poslist.n = 0;
}
}else{
fts5ExprNodeZeroPoslist(pNode->pLeft);
fts5ExprNodeZeroPoslist(pNode->pRight);
}
}
static int fts5ExprNodeTest(
int *pRc,
Fts5Expr *pExpr,
i64 iRowid,
Fts5ExprNode *pNode
){
int bRes = 0;
if( pNode->bEof || pNode->iRowid!=iRowid ){
bRes = 0;
}else {
switch( pNode->eType ){
case FTS5_STRING:
bRes = fts5ExprNearTest(pRc, pExpr, pNode);
if( *pRc ) bRes = 0;
break;
case FTS5_AND: {
int bRes1 = fts5ExprNodeTest(pRc, pExpr, iRowid, pNode->pLeft);
int bRes2 = fts5ExprNodeTest(pRc, pExpr, iRowid, pNode->pRight);
assert( (bRes1==0 || bRes1==1) && (bRes2==0 || bRes2==1) );
bRes = (bRes1 && bRes2);
if( bRes1!=bRes2 ){
fts5ExprNodeZeroPoslist(bRes1 ? pNode->pLeft : pNode->pRight);
}
break;
}
case FTS5_OR: {
int bRes1 = fts5ExprNodeTest(pRc, pExpr, iRowid, pNode->pLeft);
int bRes2 = fts5ExprNodeTest(pRc, pExpr, iRowid, pNode->pRight);
bRes = (bRes1 || bRes2);
break;
}
default:
assert( pNode->eType==FTS5_NOT );
bRes = fts5ExprNodeTest(pRc, pExpr, iRowid, pNode->pLeft);
break;
}
}
return bRes;
}
static void fts5ExprSetEof(Fts5ExprNode *pNode){
if( pNode ){
pNode->bEof = 1;
fts5ExprSetEof(pNode->pLeft);
fts5ExprSetEof(pNode->pRight);
}
................................................................................
Fts5ExprNode *pNode /* Expression node to test */
){
int rc = SQLITE_OK;
if( pNode->bEof==0 ){
switch( pNode->eType ){
case FTS5_STRING: {
#if 0
rc = fts5ExprNearNextMatch(pExpr, pNode);
#endif
rc = fts5ExprNearNextRowidMatch(pExpr, pNode);
break;
}
case FTS5_AND: {
Fts5ExprNode *p1 = pNode->pLeft;
Fts5ExprNode *p2 = pNode->pRight;
................................................................................
while( rc==SQLITE_OK && p1->bEof==0 ){
int cmp = fts5NodeCompare(pExpr, p1, p2);
if( cmp>0 ){
rc = fts5ExprNodeNext(pExpr, p2, 1, p1->iRowid);
cmp = fts5NodeCompare(pExpr, p1, p2);
}
assert( rc!=SQLITE_OK || cmp<=0 );
if( 0==fts5ExprNodeTest(&rc, pExpr, p1->iRowid, p2) ) break;
rc = fts5ExprNodeNext(pExpr, p1, 0, 0);
}
pNode->bEof = p1->bEof;
pNode->iRowid = p1->iRowid;
break;
}
}
................................................................................
if( pNode->eType==FTS5_STRING ){
/* Initialize all term iterators in the NEAR object. */
rc = fts5ExprNearInitAll(pExpr, pNode);
/* Attempt to advance to the first match */
if( rc==SQLITE_OK && pNode->bEof==0 ){
#if 0
rc = fts5ExprNearNextMatch(pExpr, pNode);
#endif
rc = fts5ExprNearNextRowidMatch(pExpr, pNode);
}
}else{
rc = fts5ExprNodeFirst(pExpr, pNode->pLeft);
if( rc==SQLITE_OK ){
rc = fts5ExprNodeFirst(pExpr, pNode->pRight);
}
................................................................................
rc = fts5ExprNodeNextMatch(pExpr, pNode);
}
}
return rc;
}
/*
** Begin iterating through the set of documents in index pIdx matched by
** the MATCH expression passed as the first argument. If the "bDesc" parameter
** is passed a non-zero value, iteration is in descending rowid order. Or,
** if it is zero, in ascending order.
**
** Return SQLITE_OK if successful, or an SQLite error code otherwise. It
** is not considered an error if the query does not match any documents.
*/
int sqlite3Fts5ExprFirst(Fts5Expr *p, Fts5Index *pIdx, int bDesc){
Fts5ExprNode *pRoot = p->pRoot;
int rc = SQLITE_OK;
if( pRoot ){
p->pIndex = pIdx;
p->bDesc = bDesc;
rc = fts5ExprNodeFirst(p, pRoot);
if( pRoot->bEof==0
&& 0==fts5ExprNodeTest(&rc, p, pRoot->iRowid, pRoot)
&& rc==SQLITE_OK
){
rc = sqlite3Fts5ExprNext(p);
}
}
return rc;
}
/*
** Move to the next document
**
** Return SQLITE_OK if successful, or an SQLite error code otherwise. It
** is not considered an error if the query does not match any documents.
*/
int sqlite3Fts5ExprNext(Fts5Expr *p){
int rc;
do {
rc = fts5ExprNodeNext(p, p->pRoot, 0, 0);
}while( p->pRoot->bEof==0
&& fts5ExprNodeTest(&rc, p, p->pRoot->iRowid, p->pRoot)==0
&& rc==SQLITE_OK
);
return rc;
}
int sqlite3Fts5ExprEof(Fts5Expr *p){
return (p->pRoot==0 || p->pRoot->bEof);
}
|
Changes to ext/fts5/test/fts5_common.tcl.
275 276 277 278 279 280 281 282 283 284 285 |
if {[llength $a]==0 || [llength $b]==0} { return [list] }
sort_poslist [concat $a $b]
}
proc OR {a b} {
sort_poslist [concat $a $b]
}
proc NOT {a b} {
if {[llength $b]} { return [list] }
return $a
}
|
| |
275 276 277 278 279 280 281 282 283 284 285 |
if {[llength $a]==0 || [llength $b]==0} { return [list] }
sort_poslist [concat $a $b]
}
proc OR {a b} {
sort_poslist [concat $a $b]
}
proc NOT {a b} {
if {[llength $b]>0} { return [list] }
return $a
}
|
Changes to ext/fts5/test/fts5auto.test.
222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 |
{d} {j x i b x u y d c p v a h}
2391989
{b n w x w f q h p i} {e u b b i n a i o c d g}
{v a z o i e n l x l r} {r u f o r k w m d w}
{k s} {r f e j q p w}
}
do_test 1.0 {
execsql {
BEGIN;
CREATE VIRTUAL TABLE tt USING fts5(a, b, c, d, e, f);
}
foreach {rowid a b c d e f} $data {
execsql {
INSERT INTO tt(rowid, a, b, c, d, e, f)
VALUES($rowid, $a, $b, $c, $d, $e, $f)
}
}
execsql {
COMMIT;
}
} {}
proc fts5_test_poslist {cmd} {
set res [list]
for {set i 0} {$i < [$cmd xInstCount]} {incr i} {
lappend res [string map {{ } .} [$cmd xInst $i]]
}
set res
}
sqlite3_fts5_create_function db fts5_test_poslist fts5_test_poslist
proc matchdata {expr} {
set tclexpr [db one {
SELECT fts5_expr_tcl(
$expr, 'nearset $cols -pc ::pc', 'a','b','c','d','e','f'
)
}]
set res [list]
db eval {SELECT rowid, * FROM tt} {
set cols [list $a $b $c $d $e $f]
set ::pc 0
set rowdata [eval $tclexpr]
if {$rowdata != ""} {
lappend res $rowid $rowdata
}
}
set res
}
#-------------------------------------------------------------------------
#
do_execsql_test 2.0 {
SELECT rowid, fts5_test_poslist(tt) FROM tt WHERE tt MATCH 'a AND b';
} [matchdata "a AND b"]
do_test 2.1 {
llength [matchdata "a AND b"]
} 62
foreach {tn expr} {
1 { [a] : x }
2 { [a b] : x }
3 { [a b f] : x }
4 { [f a b] : x }
5 { [f a b] : x y }
6 { [f a b] : x + y }
7 { [c a b] : x + c }
8 { [c d] : "l m" }
9 { [c e] : "l m" }
} {
set res [matchdata $expr]
do_test 3.$tn.[llength $res] {
execsql {
SELECT rowid, fts5_test_poslist(tt) FROM tt WHERE tt MATCH $expr
}
} $res
}
finish_test
|
| < < | < < < < < < < < < < < < < < > | < < < < | | < < | < > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | < < > > | < < < > > > > | > > > > | | | | | | | | | | < < < < < | > > > > > > > > > | > | | |
222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 |
{d} {j x i b x u y d c p v a h}
2391989
{b n w x w f q h p i} {e u b b i n a i o c d g}
{v a z o i e n l x l r} {r u f o r k w m d w}
{k s} {r f e j q p w}
}
do_execsql_test 1.0 {
CREATE VIRTUAL TABLE tt USING fts5(a, b, c, d, e, f);
} {}
fts5_aux_test_functions db
proc matchdata {expr {order ASC}} {
set tclexpr [db one {
SELECT fts5_expr_tcl(
$expr, 'nearset $cols -pc ::pc', 'a','b','c','d','e','f'
)
}]
set res [list]
db eval "SELECT rowid, * FROM tt ORDER BY rowid $order" {
set cols [list $a $b $c $d $e $f]
set ::pc 0
set rowdata [eval $tclexpr]
if {$rowdata != ""} { lappend res $rowid $rowdata }
}
set res
}
proc do_auto_test {tn expr} {
foreach order {asc desc} {
set res [matchdata $expr $order]
set testname "3.$tn.[string range $order 0 0].rows=[expr [llength $res]/2]"
set ::autotest_expr $expr
do_execsql_test $testname [subst -novar {
SELECT rowid, fts5_test_poslist(tt) FROM tt
WHERE tt MATCH $::autotest_expr ORDER BY rowid [set order]
}] $res
}
}
#-------------------------------------------------------------------------
#
for {set fold 0} {$fold < 3} {incr fold} {
switch $fold {
0 { set map {} }
1 { set map {
a a b a c b d b e c f c g d h d
i e j e k f l f m g g g o h p h
q i r i s j t j u k v k w l x l
y m z m
}}
2 { set map {
a a b a c a d a e a f a g a h a
i b j b k b l b m b g b o b p b
q c r c s c t c u c v c w c x c
}}
}
execsql {
BEGIN;
DELETE FROM tt;
}
foreach {rowid a b c d e f} [string map $map $data] {
execsql {
INSERT INTO tt(rowid, a, b, c, d, e, f)
VALUES($rowid, $a, $b, $c, $d, $e, $f)
}
}
execsql COMMIT
foreach {tn expr} {
3.1 { [a] : x }
3.2 { [a b] : x }
3.3 { [a b f] : x }
3.4 { [f a b] : x }
3.5 { [f a b] : x y }
3.6 { [f a b] : x + y }
3.7 { [c a b] : x + c }
3.8 { [c d] : "l m" }
3.9 { [c e] : "l m" }
4.1 { a NOT b }
4.2 { a NOT a:b }
4.3 { a OR (b AND c) }
4.4 { a OR (b AND [a b c]:c) }
4.5 { a OR "b c" }
4.6 { a OR b OR c }
5.1 { a OR (b AND "b c") }
5.2 { a OR (b AND "z c") }
} {
do_auto_test 3.$fold.$tn $expr
}
}
finish_test
|