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Fix the VDBE so that it correctly handles the sequence of operations

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OP_OpenEphemeral, OP_OpenDup, OP_OpenEphemeral, and OP_OpenDup in that
order on the same cursor.

FossilOrigin-Name: a1be6ee0188911448c064e2c25fb0ca1daad50f3d50fb49a34430bd09736b4a9
This commit is contained in:
drh
2020-01-18 13:53:46 +00:00
parent 2d58b7f40f
commit 1ee02a1ce5
4 changed files with 34 additions and 12 deletions
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6
src/vdbe.c
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@@ -3917,15 +3917,13 @@ case OP_OpenEphemeral: {
assert( pOp->p1>=0 );
assert( pOp->p2>=0 );
pCx = p->apCsr[pOp->p1];
if( pCx ){
if( pCx && pCx->pBtx ){
/* If the ephermeral table is already open, erase all existing content
** so that the table is empty again, rather than creating a new table. */
assert( pCx->isEphemeral );
pCx->seqCount = 0;
pCx->cacheStatus = CACHE_STALE;
if( pCx->pBtx ){
rc = sqlite3BtreeClearTable(pCx->pBtx, pCx->pgnoRoot, 0);
}
rc = sqlite3BtreeClearTable(pCx->pBtx, pCx->pgnoRoot, 0);
}else{
pCx = allocateCursor(p, pOp->p1, pOp->p2, -1, CURTYPE_BTREE);
if( pCx==0 ) goto no_mem;