Function find_prepared_statement

sql/sql_prepare.cc:399–419

*/

static Prepared_statement *
find_prepared_statement(THD *thd, ulong id)
{
  /*
    To strictly separate namespaces of SQL prepared statements and C API
    prepared statements find() will return 0 if there is a named prepared
    statement with such id.

    LAST_STMT_ID is special value which mean last prepared statement ID
    (it was made for COM_MULTI to allow prepare and execute a statement
    in the same command but usage is not limited by COM_MULTI only).
  */
  Statement *stmt= ((id == LAST_STMT_ID) ?
                    thd->last_stmt :
                    thd->stmt_map.find(id));

  if (stmt == 0 || stmt->type() != Query_arena::PREPARED_STATEMENT)
    return NULL;

  return (Prepared_statement *) stmt;
}


/**