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Experimental opimizations to speed up FK constraint CASCADE and SET NULL action processing.

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FossilOrigin-Name: 35a20a5f22245c70faa51965951e8cc011defa93
This commit is contained in:
dan
2014-12-16 20:13:30 +00:00
parent 58cca03ce5
commit 0466883300
5 changed files with 150 additions and 32 deletions
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11
src/vdbeaux.c
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@@ -396,6 +396,7 @@ static Op *opIterNext(VdbeOpIter *p){
*/
int sqlite3VdbeAssertMayAbort(Vdbe *v, int mayAbort){
int hasAbort = 0;
int hasFkCounter = 0;
Op *pOp;
VdbeOpIter sIter;
memset(&sIter, 0, sizeof(sIter));
@@ -404,15 +405,17 @@ int sqlite3VdbeAssertMayAbort(Vdbe *v, int mayAbort){
while( (pOp = opIterNext(&sIter))!=0 ){
int opcode = pOp->opcode;
if( opcode==OP_Destroy || opcode==OP_VUpdate || opcode==OP_VRename
#ifndef SQLITE_OMIT_FOREIGN_KEY
|| (opcode==OP_FkCounter && pOp->p1==0 && pOp->p2==1)
#endif
|| ((opcode==OP_Halt || opcode==OP_HaltIfNull)
&& ((pOp->p1&0xff)==SQLITE_CONSTRAINT && pOp->p2==OE_Abort))
){
hasAbort = 1;
break;
}
#ifndef SQLITE_OMIT_FOREIGN_KEY
if( opcode==OP_FkCounter && pOp->p1==0 && pOp->p2==1 ){
hasFkCounter = 1;
}
#endif
}
sqlite3DbFree(v->db, sIter.apSub);
@@ -421,7 +424,7 @@ int sqlite3VdbeAssertMayAbort(Vdbe *v, int mayAbort){
** through all opcodes and hasAbort may be set incorrectly. Return
** true for this case to prevent the assert() in the callers frame
** from failing. */
return ( v->db->mallocFailed || hasAbort==mayAbort );
return ( v->db->mallocFailed || hasAbort==mayAbort || hasFkCounter );
}
#endif /* SQLITE_DEBUG - the sqlite3AssertMayAbort() function */