SQLite

} {b world {}}
do_execsql_test 12.2 {
  SELECT * FROM ft NATURAL JOIN t1 WHERE ft MATCH('b')
} {b world {}}
do_execsql_test 12.3 {
  SELECT * FROM t2 JOIN ft USING (ft)
} {3 4 b b}

#-------------------------------------------------------------------------
# Forum post https://sqlite.org/forum/forumpost/21127c1160
#
reset_db
sqlite3_db_config db DEFENSIVE 1

do_execsql_test 13.0 {
  CREATE TABLE a (id INTEGER PRIMARY KEY, name TEXT);
  CREATE VIRTUAL TABLE b USING fts5(name);
  CREATE TRIGGER a_trigger AFTER INSERT ON a BEGIN 
    INSERT INTO b (name) VALUES ('foo');
  END;
}

do_test 13.1 {
  set ::STMT [
    sqlite3_prepare db "INSERT INTO a VALUES (1, 'foo') RETURNING id;" -1 dummy
  ]
  sqlite3_step $::STMT
} {SQLITE_ROW}

do_test 13.2 {
  sqlite3_finalize $::STMT
} {SQLITE_OK}

do_test 13.3 {
  sqlite3_errmsg db
} {not an error}

finish_test

** context.
*/
int sqlite3ReadOnlyShadowTables(sqlite3 *db){
#ifndef SQLITE_OMIT_VIRTUALTABLE
  if( (db->flags & SQLITE_Defensive)!=0
   && db->pVtabCtx==0
   && db->nVdbeExec==0
   && !sqlite3VtabInSync(db)
  ){
    return 1;
  }
#endif
  return 0;
}