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Add the ability to enable and disable foreign key constraints and triggers

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using calls to sqlite3_db_config().

FossilOrigin-Name: 09e167f9c14625924b17bbb1f292f89ac9ddc93a
This commit is contained in:
drh
2011-03-21 17:15:58 +00:00
parent 8ce0261d09
commit e83cafd2f0
9 changed files with 78 additions and 28 deletions
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30
src/main.c
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@@ -522,7 +522,35 @@ int sqlite3_db_config(sqlite3 *db, int op, ...){
break;
}
default: {
static const struct {
int op; /* The opcode */
u32 mask; /* Mask of the bit in sqlite3.flags to set/clear */
} aFlagOp[] = {
{ SQLITE_DBCONFIG_ENABLE_FKEY, SQLITE_ForeignKeys },
{ SQLITE_DBCONFIG_ENABLE_TRIGGER, SQLITE_EnableTrigger },
};
int i;
rc = SQLITE_ERROR; /* IMP: R-42790-23372 */
for(i=0; i<ArraySize(aFlagOp); i++){
if( aFlagOp[i].op==op ){
int onoff = va_arg(ap, int);
int *pRes = va_arg(ap, int*);
u32 oldFlags = db->flags;
if( onoff>0 ){
db->flags |= aFlagOp[i].mask;
}else if( onoff==0 ){
db->flags &= ~aFlagOp[i].mask;
}
if( oldFlags!=db->flags ){
sqlite3ExpirePreparedStatements(db);
}
if( pRes ){
*pRes = (db->flags & aFlagOp[i].mask)!=0;
}
rc = SQLITE_OK;
break;
}
}
break;
}
}
@@ -1855,7 +1883,7 @@ static int openDatabase(
db->autoCommit = 1;
db->nextAutovac = -1;
db->nextPagesize = 0;
db->flags |= SQLITE_ShortColNames | SQLITE_AutoIndex
db->flags |= SQLITE_ShortColNames | SQLITE_AutoIndex | SQLITE_EnableTrigger
#if SQLITE_DEFAULT_FILE_FORMAT<4
| SQLITE_LegacyFileFmt
#endif