SQLite

  Btree *p,                                   /* The btree */
  int iTable,                                 /* Root page of table to open */
  int wrFlag,                                 /* 1 to write. 0 read-only */
  struct KeyInfo *pKeyInfo,                   /* First arg to xCompare() */
  BtCursor *pCur                              /* Write new cursor here */
){
  int rc;
  if( iTable<1 ){
    rc = SQLITE_CORRUPT_BKPT;
  }else{
    sqlite3BtreeEnter(p);
    rc = btreeCursor(p, iTable, wrFlag, pKeyInfo, pCur);
    sqlite3BtreeLeave(p);
  }
  return rc;
}

/*
** Return the size of a BtCursor object in bytes.
**
** This interfaces is needed so that users of cursors can preallocate

  db close
  hexio_write test.db 616 EAFFFFFF0202
  sqlite3 db test.db
  breakpoint
  execsql { DELETE FROM t1 WHERE rowid=2 }
} {}

#-------------------------------------------------------------------------
# See what happens if the sqlite_master entry associated with a PRIMARY
# KEY or UNIQUE index is removed. 
#
reset_db
do_execsql_test 7.0 {
  CREATE TABLE t1(x PRIMARY KEY, y);
  INSERT INTO t1 VALUES('a', 'A');
  INSERT INTO t1 VALUES('b', 'A');
  INSERT INTO t1 VALUES('c', 'A');
  SELECT name FROM sqlite_master;
} {t1 sqlite_autoindex_t1_1}
do_execsql_test 7.1 {
  PRAGMA writable_schema = 1;
  DELETE FROM sqlite_master WHERE name = 'sqlite_autoindex_t1_1';
}
do_test 7.2 {
  db close
  sqlite3 db test.db
  catchsql { UPDATE t1 SET x='d' AND y='D' WHERE rowid = 2 }
} {1 {database disk image is malformed}}

finish_test