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In temp files used for merge sorting, store the size of each packed-memory-array at the start of the array itself. This is to avoid having to store the offsets of all arrays in the (potentially very large) file in main-memory.

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FossilOrigin-Name: 8051c1767c4386b0f14a66742d9fac41e001eb07
This commit is contained in:
dan
2011-08-06 12:01:58 +00:00
parent f834eff2f0
commit 1e74e602ec
5 changed files with 155 additions and 119 deletions
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13
src/vdbe.c
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@@ -4373,8 +4373,6 @@ case OP_IdxInsert: { /* in2 */
assert( pOp->p1>=0 && pOp->p1<p->nCursor );
pC = p->apCsr[pOp->p1];
assert( pC!=0 );
rc = sqlite3VdbeSorterWrite(db, pC);
if( rc!=SQLITE_OK ) goto abort_due_to_error;
pIn2 = &aMem[pOp->p2];
assert( pIn2->flags & MEM_Blob );
pCrsr = pC->pCursor;
@@ -4384,10 +4382,13 @@ case OP_IdxInsert: { /* in2 */
if( rc==SQLITE_OK ){
nKey = pIn2->n;
zKey = pIn2->z;
rc = sqlite3BtreeInsert(pCrsr, zKey, nKey, "", 0, 0, pOp->p3,
((pOp->p5 & OPFLAG_USESEEKRESULT) ? pC->seekResult : 0)
);
assert( pC->deferredMoveto==0 );
rc = sqlite3VdbeSorterWrite(db, pC, nKey);
if( rc==SQLITE_OK ){
rc = sqlite3BtreeInsert(pCrsr, zKey, nKey, "", 0, 0, pOp->p3,
((pOp->p5 & OPFLAG_USESEEKRESULT) ? pC->seekResult : 0)
);
assert( pC->deferredMoveto==0 );
}
pC->cacheStatus = CACHE_STALE;
}
}