/*
** This function is called to drop a trigger from the database schema.
**
** This may be called directly from the parser and therefore identifies
** the trigger by name. The sqlite3DropTriggerPtr() routine does the
** same job as this routine except it takes a pointer to the trigger
** instead of the trigger name.
**/
void sqlite3DropTrigger(Parse *pParse, SrcList *pName){
Trigger *pTrigger = 0;
int i;
const char *zDb;
const char *zName;
int nName;
sqlite *db = pParse->db;
if( sqlite3_malloc_failed ) goto drop_trigger_cleanup;
if( SQLITE_OK!=sqlite3ReadSchema(pParse) ){
goto drop_trigger_cleanup;
}
assert( pName->nSrc==1 );
zDb = pName->a[0].zDatabase;
zName = pName->a[0].zName;
nName = strlen(zName);
for(i=0; i<db->nDb; i++){
int j = (i<2) ? i^1 : i; /* Search TEMP before MAIN */
if( zDb && sqlite3StrICmp(db->aDb[j].zName, zDb) ) continue;
pTrigger = sqlite3HashFind(&(db->aDb[j].trigHash), zName, nName+1);
if( pTrigger ) break;
}
if( !pTrigger ){
sqlite3ErrorMsg(pParse, "no such trigger: %S", pName, 0);
goto drop_trigger_cleanup;
}
sqlite3DropTriggerPtr(pParse, pTrigger, 0);
drop_trigger_cleanup:
sqlite3SrcListDelete(pName);
}
/*
** This function is called to drop a trigger from the database schema.
**
** This may be called directly from the parser and therefore identifies
** the trigger by name. The sqlite3DropTriggerPtr() routine does the
** same job as this routine except it takes a pointer to the trigger
** instead of the trigger name.
**/
void sqlite3DropTrigger(Parse *pParse, SrcList *pName, int noErr){
Trigger *pTrigger = 0;
int i;
const char *zDb;
const char *zName;
int nName;
sqlite3 *db = pParse->db;
if (db->mallocFailed) goto drop_trigger_cleanup;
if (SQLITE_OK != sqlite3ReadSchema(pParse)){
goto drop_trigger_cleanup;
}
assert(pName->nSrc == 1);
zDb = pName->a[0].zDatabase;
zName = pName->a[0].zName;
nName = sqlite3Strlen30(zName);
assert(zDb != 0 || sqlite3BtreeHoldsAllMutexes(db));
for (i = OMIT_TEMPDB; i < db->nDb; i++){
int j = (i < 2) ? i ^ 1 : i; /* Search TEMP before MAIN */
if (zDb && sqlite3StrICmp(db->aDb[j].zName, zDb)) continue;
assert(sqlite3SchemaMutexHeld(db, j, 0));
pTrigger = sqlite3HashFind(&(db->aDb[j].pSchema->trigHash), zName, nName);
if (pTrigger) break;
}
if (!pTrigger){
if (!noErr){
sqlite3ErrorMsg(pParse, "no such trigger: %S", pName, 0);
}
else{
sqlite3CodeVerifyNamedSchema(pParse, zDb);
}
pParse->checkSchema = 1;
goto drop_trigger_cleanup;
}
sqlite3DropTriggerPtr(pParse, pTrigger);
drop_trigger_cleanup:
sqlite3SrcListDelete(db, pName);
}