Handle temp triggers attached to databases clobbered by sqlite3_deserialize() in the same way as those attached to DETACHed databases.

FossilOrigin-Name: 872587e1567020e32c6c833b40818ba88a0b02de97b9db7b16daae08762508a8

manifest

@@ -1,5 +1,5 @@
-C Ensure\sthat\seponymous\svirtual\stable\sobjects\sare\snot\sleft\swith\sdangling\sschema\spointers\sif\sthe\smain\sdatabase\sis\soverwritten\susing\ssqlite3_serialize().
-D 2026-10-05T14:13:52.993
+C Handle\stemp\striggers\sattached\sto\sdatabases\sclobbered\sby\ssqlite3_deserialize()\sin\sthe\ssame\sway\sas\sthose\sattached\sto\sDETACHed\sdatabases.
+D 2026-10-05T18:11:38.016
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -676,7 +676,7 @@ F sqlite3.1 1b9c24374a85dfc7eb8fa7c4266ee0db4f9609cceecfc5481cd8307e5af04366
 F sqlite3.pc.in e6dee284fba59ef500092fdc1843df3be8433323a3733c91da96690a50a5b398
 F src/alter.c d7cbe4332a7a2c3a21ab58ee2609efade493f6ae78254613ada0759898629ee3
 F src/analyze.c 42ed904f4a81d0e4f32491e10ff8ea3cdf2f98a29b04a015f0a29046b32b4e0f
-F src/attach.c 833a90efe85acedc38c6231e38bb763a9fb0fd0757bcb05dad61b8cabc143c59
+F src/attach.c dc4be11e8bd4d6656facdc62992cc2d171e6fd6c9aac109af9db8d2316f9847a
 F src/auth.c ebec42df26b34a62b6750d30d9c2c03554a1c522020182476f7729a439fef04f
 F src/backup.c a3181d1a979bca40dd2b60393cf664c9659e71c25938661c1d3a786e489880f0
 F src/bitvec.c e242d4496774dfc88fa278177dd23b607dce369ccafb3f61b41638eea2c9b399
@@ -1429,7 +1429,7 @@ F test/malloctraceviewer.tcl 3e3ddf11e30d2b20f53aa16aa6615082fb24a100bea61cca721
 F test/manydb.test 28385ae2087967aa05c38624cec7d96ec74feb3e
 F test/mem5.test c6460fba403c5703141348cd90de1c294188c68f
 F test/memdb.test c1f2a343ad14398d5d6debda6ea33e80d0dafcc7
-F test/memdb1.test bc34f7a0fca53be99417007569d9409c548a31121485e60cc8c77ea053f4ad7e
+F test/memdb1.test 5ae1afad50df9d3ac63bc7bcdd1db39533b5c68f969efdffdba3af4dda179182
 F test/memdb2.test 4ba1fc09e2f51df80d148a540e4a3fa66d0462e91167b27497084de4d1f6b5b4
 F test/memjournal.test 70f3a00c7f84ee2978ad14e831231caa1e7f23915a2c54b4f775a021d5740c6c
 F test/memjournal2.test dbc2c5cb5f7b38950f4f6dc3e73fcecf0fcbed3fc32c7ce913bba164d288da1e
@@ -2207,9 +2207,9 @@ F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee
 F tool/warnings.sh a554d13f6e5cf3760f041b87939e3d616ec6961859c3245e8ef701d1eafc2ca2
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
 F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
-P fc3b85a1b75bb880195b88523f6d75f825f6874c487cd4d69254d588c9123c67
-Q +18d2646f6fa56244be12122873cd9aa48b2074a22f0be637edfcc9b5de99158b
-R cbd271c83b87bce14ce05596d18bdd92
+P 794e3e0fe386284327c3a58f7071087ab9d3580aae44efe835663597f74e39c2
+Q +84c773fcc2f785346fd12e8a17ac45f9068797d9629ddc367318994b6fed421b
+R 777a55f2c40fa66f94e2eb9c2dcce8af
 U dan
-Z 9c8c0c2d23ad65c9418341125a69d51c
+Z 386fc9eedeb6167cb33d766410e272b8
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-794e3e0fe386284327c3a58f7071087ab9d3580aae44efe835663597f74e39c2
+872587e1567020e32c6c833b40818ba88a0b02de97b9db7b16daae08762508a8

src/attach.c

@@ -56,6 +56,23 @@ int sqlite3DbIsNamed(sqlite3 *db, int iDb, const char *zName){
   );
 }
 
+/*
+** If any TEMP triggers reference schema pSchema, move those triggers to
+** reference the TEMP schema itself.
+*/
+static void detachTempTriggers(sqlite3 *db, Schema *pSchema){
+  HashElem *pEntry;
+  assert( db->aDb[1].pSchema );
+  pEntry = sqliteHashFirst(&db->aDb[1].pSchema->trigHash);
+  while( pEntry ){
+    Trigger *pTrig = (Trigger*)sqliteHashData(pEntry);
+    if( pTrig->pTabSchema==pSchema ){
+      pTrig->pTabSchema = pTrig->pSchema;
+    }
+    pEntry = sqliteHashNext(pEntry);
+  }
+}
+
 /*
 ** An SQL user-function registered to do the work of an ATTACH statement. The
 ** three arguments to the function come directly from an attach statement:
@@ -125,6 +142,7 @@ static void attachFunc(
         /* Both the Btree and the new Schema were allocated successfully.
         ** Close the old db and update the aDb[] slot with the new memdb
         ** values.  */
+        detachTempTriggers(db, pNew->pSchema);
         sqlite3BtreeClose(pNew->pBt);
         pNew->pBt = pNewBt;
         pNew->pSchema = pNewSchema;
@@ -304,7 +322,6 @@ static void detachFunc(
   sqlite3 *db = sqlite3_context_db_handle(context);
   int i;
   Db *pDb = 0;
-  HashElem *pEntry;
   char zErr[128];
 
   UNUSED_PARAMETER(NotUsed);
@@ -331,18 +348,7 @@ 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);
-  }
-
+  detachTempTriggers(db, pDb->pSchema);
   sqlite3BtreeClose(pDb->pBt);
   pDb->pBt = 0;
   pDb->pSchema = 0;

test/memdb1.test

@@ -363,4 +363,45 @@ do_execsql_test 1250 {
   SELECT value FROM json_each('[4,5]');
 } {4 5}
 
+#-------------------------------------------------------------------------
+# A TEMP trigger on a table in a database overwritten by a deserialize() 
+# is orphaned in the same way as if the db was DETACHed.
+#
+reset_db
+do_execsql_test 1400 {
+  CREATE TABLE t1(x);
+}
+set blob [db serialize main]
+
+do_execsql_test 1410 {
+  CREATE TEMP TABLE tlog(y);
+  CREATE TEMP TRIGGER tr AFTER INSERT ON main.t1 BEGIN
+    INSERT INTO tlog VALUES(new.x);
+  END;
+  INSERT INTO t1 VALUES(1);
+  SELECT * FROM tlog;
+} {1}
+
+do_test 1420 { db deserialize main $blob } {}
+
+do_execsql_test 1430 {
+  INSERT INTO t1 VALUES(2);
+  SELECT * FROM tlog;
+} {1}
+
+do_execsql_test 1440 {
+  SELECT name, tbl_name FROM temp.sqlite_schema WHERE type='trigger';
+} {tr t1}
+
+do_execsql_test 1450 {
+  CREATE TEMP TABLE t1(x);
+  INSERT INTO temp.t1 VALUES(3);
+  SELECT * FROM tlog;
+} {1}
+
+do_execsql_test 1460 {
+  DROP TRIGGER temp.tr;
+  SELECT name FROM temp.sqlite_schema WHERE type='trigger';
+} {}
+
 finish_test