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Do not allow triggers that run as part of REPLACE conflict resolution

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during an UPDATE to modify the the table being updated.  Otherwise, those
triggers might delete content out from under the update operation, leading
to all kinds of problems.  Ticket [314cc133e5ada126]

FossilOrigin-Name: db4b7e1dc399c1f16b827ac087aa37c0815f4b2f41f1ffad59963eead2ab5562
This commit is contained in:
drh
2019-12-29 22:08:20 +00:00
parent be3da24134
commit 7b14b65d20
10 changed files with 104 additions and 20 deletions
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15
src/btree.c
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@@ -699,6 +699,9 @@ static int saveCursorPosition(BtCursor *pCur){
assert( 0==pCur->pKey );
assert( cursorHoldsMutex(pCur) );
if( pCur->curFlags & BTCF_Pinned ){
return SQLITE_CONSTRAINT_PINNED;
}
if( pCur->eState==CURSOR_SKIPNEXT ){
pCur->eState = CURSOR_VALID;
}else{
@@ -4562,6 +4565,18 @@ i64 sqlite3BtreeIntegerKey(BtCursor *pCur){
return pCur->info.nKey;
}
/*
** Pin or unpin a cursor.
*/
void sqlite3BtreeCursorPin(BtCursor *pCur){
assert( (pCur->curFlags & BTCF_Pinned)==0 );
pCur->curFlags |= BTCF_Pinned;
}
void sqlite3BtreeCursorUnpin(BtCursor *pCur){
assert( (pCur->curFlags & BTCF_Pinned)!=0 );
pCur->curFlags &= ~BTCF_Pinned;
}
#ifdef SQLITE_ENABLE_OFFSET_SQL_FUNC
/*
** Return the offset into the database file for the start of the