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If a TEMP TRIGGER references an auxiliary schema, and that auxiliary schema

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is detached, move the trigger to reference the TEMP schema before completing
the detach, so that the trigger does not hold a dangling schema pointer.

FossilOrigin-Name: 069c2f4c61f06211a8981abc412afcc1536ece13380b13a70aa99123f8f527cd
This commit is contained in:
drh
2019-08-27 10:05:45 +00:00
parent d790c9a161
commit 6397a78b2b
5 changed files with 44 additions and 17 deletions
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13
src/attach.c
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@@ -299,6 +299,7 @@ static void detachFunc(
sqlite3 *db = sqlite3_context_db_handle(context);
int i;
Db *pDb = 0;
HashElem *pEntry;
char zErr[128];
UNUSED_PARAMETER(NotUsed);
@@ -323,6 +324,18 @@ static void detachFunc(
goto detach_error;
}
/* If any TEMP triggers reference the schema being detached, move those
** triggers to reference the TEMP schema itself. */
assert( db->aDb[1].pSchema );
pEntry = sqliteHashFirst(&db->aDb[1].pSchema->trigHash);
while( pEntry ){
Trigger *pTrig = (Trigger*)sqliteHashData(pEntry);
if( pTrig->pTabSchema==pDb->pSchema ){
pTrig->pTabSchema = pTrig->pSchema;
}
pEntry = sqliteHashNext(pEntry);
}
sqlite3BtreeClose(pDb->pBt);
pDb->pBt = 0;
pDb->pSchema = 0;