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Overview
| Comment: | Another optimization on the OP_Column opcode. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
1765672c2599eb03d39c52cd2dc32ea1 |
| User & Date: | drh 2016-05-20 21:40:11 |
Context
|
2016-05-20
| ||
| 23:51 | Add a simple TCL script for summing cachegrind information for each VDBE opcode. (check-in: 96cf821b user: drh tags: trunk) | |
| 21:40 | Another optimization on the OP_Column opcode. (check-in: 1765672c user: drh tags: trunk) | |
| 20:58 | Fix typo in comment. (check-in: 9db8f214 user: mistachkin tags: trunk) | |
Changes
Changes to src/vdbe.c.
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}else{
zHdr += sqlite3GetVarint32(zHdr, &t);
offset64 += sqlite3VdbeSerialTypeLen(t);
}
pC->aType[i++] = t;
aOffset[i] = (u32)(offset64 & 0xffffffff);
}while( i<=p2 && zHdr<zEndHdr );
pC->nHdrParsed = i;
pC->iHdrOffset = (u32)(zHdr - zData);
/* The record is corrupt if any of the following are true:
** (1) the bytes of the header extend past the declared header size
** (2) the entire header was used but not all data was used
** (3) the end of the data extends beyond the end of the record.
*/
if( (zHdr>=zEndHdr && (zHdr>zEndHdr || offset64!=pC->payloadSize))
|| (offset64 > pC->payloadSize)
){
if( pC->aRow==0 ) sqlite3VdbeMemRelease(&sMem);
rc = SQLITE_CORRUPT_BKPT;
goto abort_due_to_error;
}
if( pC->aRow==0 ) sqlite3VdbeMemRelease(&sMem);
}else{
t = 0;
}
/* If after trying to extract new entries from the header, nHdrParsed is
** still not up to p2, that means that the record has fewer than p2
** columns. So the result will be either the default value or a NULL.
|
< < | < > > > |
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}else{
zHdr += sqlite3GetVarint32(zHdr, &t);
offset64 += sqlite3VdbeSerialTypeLen(t);
}
pC->aType[i++] = t;
aOffset[i] = (u32)(offset64 & 0xffffffff);
}while( i<=p2 && zHdr<zEndHdr );
/* The record is corrupt if any of the following are true:
** (1) the bytes of the header extend past the declared header size
** (2) the entire header was used but not all data was used
** (3) the end of the data extends beyond the end of the record.
*/
if( (zHdr>=zEndHdr && (zHdr>zEndHdr || offset64!=pC->payloadSize))
|| (offset64 > pC->payloadSize)
){
if( pC->aRow==0 ) sqlite3VdbeMemRelease(&sMem);
rc = SQLITE_CORRUPT_BKPT;
goto abort_due_to_error;
}
pC->nHdrParsed = i;
pC->iHdrOffset = (u32)(zHdr - zData);
if( pC->aRow==0 ) sqlite3VdbeMemRelease(&sMem);
}else{
t = 0;
}
/* If after trying to extract new entries from the header, nHdrParsed is
** still not up to p2, that means that the record has fewer than p2
** columns. So the result will be either the default value or a NULL.
|