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Overview
| Comment: | Fix minor problems caused by adding the rowid to the records in stat4. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | sqlite_stat4 |
| Files: | files | file ages | folders |
| SHA1: |
088d1ff94890ada50d43e6a366a58167 |
| User & Date: | dan 2013-08-12 09:29:04 |
Context
|
2013-08-12
| ||
| 11:21 | Fix a bug in calculating the average number of entries for keys not present in the sqlite_stat4 table. check-in: ec3ffb17 user: dan tags: sqlite_stat4 | |
| 09:29 | Fix minor problems caused by adding the rowid to the records in stat4. check-in: 088d1ff9 user: dan tags: sqlite_stat4 | |
|
2013-08-10
| ||
| 19:08 | Add the rowid field to the end of sample records stored in the sqlite_stat4 table. check-in: 3a5e8ab7 user: dan tags: sqlite_stat4 | |
Changes
Changes to src/analyze.c.
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if( zIndex==0 ) continue;
nSample = sqlite3_column_int(pStmt, 1);
pIdx = sqlite3FindIndex(db, zIndex, zDb);
if( pIdx==0 ) continue;
assert( pIdx->nSample==0 );
pIdx->nSample = nSample;
nByte = sizeof(IndexSample) * nSample;
nByte += sizeof(tRowcnt) * pIdx->nColumn * 3 * nSample;
nByte += pIdx->nColumn * sizeof(tRowcnt); /* Space for Index.aAvgEq[] */
pIdx->aSample = sqlite3DbMallocZero(db, nByte);
if( pIdx->aSample==0 ){
sqlite3_finalize(pStmt);
return SQLITE_NOMEM;
}
pSpace = (tRowcnt*)&pIdx->aSample[nSample];
pIdx->aAvgEq = pSpace; pSpace += pIdx->nColumn;
for(i=0; i<pIdx->nSample; i++){
pIdx->aSample[i].anEq = pSpace; pSpace += pIdx->nColumn;
pIdx->aSample[i].anLt = pSpace; pSpace += pIdx->nColumn;
pIdx->aSample[i].anDLt = pSpace; pSpace += pIdx->nColumn;
}
assert( ((u8*)pSpace)-nByte==(u8*)(pIdx->aSample) );
}
rc = sqlite3_finalize(pStmt);
if( rc ) return rc;
zSql = sqlite3MPrintf(db,
................................................................................
}else{
pPrevIdx = pIdx;
idx = 0;
}
assert( idx<pIdx->nSample );
pSample = &pIdx->aSample[idx];
nCol = pIdx->nColumn;
decodeIntArray((char*)sqlite3_column_text(pStmt,1), nCol, pSample->anEq, 0);
decodeIntArray((char*)sqlite3_column_text(pStmt,2), nCol, pSample->anLt, 0);
decodeIntArray((char*)sqlite3_column_text(pStmt,3), nCol, pSample->anDLt,0);
if( idx==pIdx->nSample-1 ){
int iCol;
for(iCol=0; iCol<pIdx->nColumn; iCol++){
................................................................................
pSample->n = sqlite3_column_bytes(pStmt, 4);
pSample->p = sqlite3DbMallocZero(db, pSample->n);
if( pSample->p==0 ){
sqlite3_finalize(pStmt);
return SQLITE_NOMEM;
}
memcpy(pSample->p, sqlite3_column_blob(pStmt, 4), pSample->n);
}
return sqlite3_finalize(pStmt);
}
#endif /* SQLITE_ENABLE_STAT4 */
/*
** Load the content of the sqlite_stat1 and sqlite_stat4 tables. The
|
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if( zIndex==0 ) continue;
nSample = sqlite3_column_int(pStmt, 1);
pIdx = sqlite3FindIndex(db, zIndex, zDb);
if( pIdx==0 ) continue;
assert( pIdx->nSample==0 );
pIdx->nSample = nSample;
nByte = sizeof(IndexSample) * nSample;
nByte += sizeof(tRowcnt) * (pIdx->nColumn+1) * 3 * nSample;
nByte += pIdx->nColumn * sizeof(tRowcnt); /* Space for Index.aAvgEq[] */
pIdx->aSample = sqlite3DbMallocZero(db, nByte);
if( pIdx->aSample==0 ){
sqlite3_finalize(pStmt);
return SQLITE_NOMEM;
}
pSpace = (tRowcnt*)&pIdx->aSample[nSample];
pIdx->aAvgEq = pSpace; pSpace += pIdx->nColumn;
for(i=0; i<pIdx->nSample; i++){
pIdx->aSample[i].anEq = pSpace; pSpace += pIdx->nColumn+1;
pIdx->aSample[i].anLt = pSpace; pSpace += pIdx->nColumn+1;
pIdx->aSample[i].anDLt = pSpace; pSpace += pIdx->nColumn+1;
}
assert( ((u8*)pSpace)-nByte==(u8*)(pIdx->aSample) );
}
rc = sqlite3_finalize(pStmt);
if( rc ) return rc;
zSql = sqlite3MPrintf(db,
................................................................................
}else{
pPrevIdx = pIdx;
idx = 0;
}
assert( idx<pIdx->nSample );
pSample = &pIdx->aSample[idx];
nCol = pIdx->nColumn+1;
decodeIntArray((char*)sqlite3_column_text(pStmt,1), nCol, pSample->anEq, 0);
decodeIntArray((char*)sqlite3_column_text(pStmt,2), nCol, pSample->anLt, 0);
decodeIntArray((char*)sqlite3_column_text(pStmt,3), nCol, pSample->anDLt,0);
if( idx==pIdx->nSample-1 ){
int iCol;
for(iCol=0; iCol<pIdx->nColumn; iCol++){
................................................................................
pSample->n = sqlite3_column_bytes(pStmt, 4);
pSample->p = sqlite3DbMallocZero(db, pSample->n);
if( pSample->p==0 ){
sqlite3_finalize(pStmt);
return SQLITE_NOMEM;
}
memcpy(pSample->p, sqlite3_column_blob(pStmt, 4), pSample->n);
}
return sqlite3_finalize(pStmt);
}
#endif /* SQLITE_ENABLE_STAT4 */
/*
** Load the content of the sqlite_stat1 and sqlite_stat4 tables. The
|
Changes to src/where.c.
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if( i==0 ){
iLower = 0;
iUpper = aSample[0].anLt[iCol];
}else{
iUpper = i>=pIdx->nSample ? pIdx->aiRowEst[0] : aSample[i].anLt[iCol];
iLower = aSample[i-1].anEq[iCol] + aSample[i-1].anLt[iCol];
}
aStat[1] = pIdx->aAvgEq[iCol];
if( iLower>=iUpper ){
iGap = 0;
}else{
iGap = iUpper - iLower;
}
if( roundUp ){
iGap = (iGap*2)/3;
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if( i==0 ){
iLower = 0;
iUpper = aSample[0].anLt[iCol];
}else{
iUpper = i>=pIdx->nSample ? pIdx->aiRowEst[0] : aSample[i].anLt[iCol];
iLower = aSample[i-1].anEq[iCol] + aSample[i-1].anLt[iCol];
}
aStat[1] = (pIdx->nColumn>iCol ? pIdx->aAvgEq[iCol] : 1);
if( iLower>=iUpper ){
iGap = 0;
}else{
iGap = iUpper - iLower;
}
if( roundUp ){
iGap = (iGap*2)/3;
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