Source File modules/qi/query_instructions.h

    1    | #ifndef READ_QUERY_INSTRUCTIONS
    2    | #define READ_QUERY_INSTRUCTIONS
    3    |
    4    | /***************************************
    5    |   $Revision: 1.26 $
    6    |
    7    |   Query instruction module (qi)
    8    |   config module.
    9    |
    10   |   Status: NOT REVUED, NOT TESTED
    11   |
    12   |   ******************/ /******************
    13   |   Copyright (c) 1999                              RIPE NCC
    14   |
    15   |   All Rights Reserved
    16   |
    17   |   Permission to use, copy, modify, and distribute this software and its
    18   |   documentation for any purpose and without fee is hereby granted,
    19   |   provided that the above copyright notice appear in all copies and that
    20   |   both that copyright notice and this permission notice appear in
    21   |   supporting documentation, and that the name of the author not be
    22   |   used in advertising or publicity pertaining to distribution of the
    23   |   software without specific, written prior permission.
    24   |
    25   |   THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
    26   |   ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS; IN NO EVENT SHALL
    27   |   AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
    28   |   DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
    29   |   AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    30   |   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
    31   |   ***************************************/
    32   | #include "rxroutines.h"
    33   | #include "iproutines.h"
    34   | #include "mysql_driver.h"
    35   | #include "query_command.h"
    36   | #include "defs.h"
    37   | #include "which_keytypes.h"
    38   |
    39   | #include "access_control.h"
    40   |
    41   |
    42   |
    43   | /*
    44   | --- snipped from http://www.tcx.se/Manual/manual.html ---
    45   |
    46   | 5.3 Functionality missing from MySQL
    47   |
    48   | The following functionality is missing in the current version of MySQL. For a prioritized list indicating when new extensions may be added to MySQL, you should consult the
    49   | online MySQL TODO list. That is the latest version of the TODO list in this manual. See section F List of things we want to add to MySQL in the future (The TODO).
    50   |
    51   | 5.3.1 Sub-selects
    52   |
    53   | The following will not yet work in MySQL:
    54   |
    55   | SELECT * FROM table1 WHERE id IN (SELECT id FROM table2);
    56   | SELECT * FROM table1 WHERE id NOT IN (SELECT id FROM table2);
    57   |
    58   | However, in many cases you can rewrite the query without a sub select:
    59   |
    60   | SELECT table1.* FROM table1,table2 WHERE table1.id=table2.id;
    61   | SELECT table1.* FROM table1 LEFT JOIN table2 ON table1.id=table2.id where table2.id IS NULL
    62   |
    63   | For more complicated sub queries you can create temporary tables to hold the sub query.
    64   |
    65   | MySQL only supports INSERT ... SELECT ... and REPLACE ... SELECT ... Independent sub-selects will be probably be available in 3.24.0. You can now use the function IN() in other
    66   | contexts, however.
    67   |
    68   | --- end snip ---
    69   |
    70   | Ie. Try using a LEFT JOIN to do the "NOT IN"/ "MINUS" equivalent.
    71   |
    72   | */
    73   |
    74   | /*
    75   |   mysql optimizer is sometimes sub-optimal,
    76   |   therefore we force the join order with STRAIGHT_JOIN (MB, 2000/05/02)
    77   |
    78   |
    79   | */
    80   |
    81   | /* RIPE 6 */
    82   | #if 1
    83   | #define Q_OBJECTS     "SELECT last.object_id, last.sequence_id, last.object ,last.object_type FROM  %s IDS STRAIGHT_JOIN last,object_order WHERE last.object_id=IDS.id AND last.object_type != 100 AND last.object_type = object_order.object_type ORDER BY ord84   | er_code"
    85   | #else
    86   | #define Q_OBJECTS     "SELECT last.object_id, last.sequence_id, last.object ,last.object_type FROM  %s IDS STRAIGHT_JOIN last WHERE last.object_id=IDS.id AND last.object_type != 100 AND last.object_type = %s "
    87   | #endif
    88   |
    89   |
    90   |
    91   | #define Q_REC         "INSERT INTO %s SELECT pe_ro_id FROM %s IDS STRAIGHT_JOIN %s WHERE object_id = IDS.id"
    92   |
    93   | #define Q_NO_OBJECTS  "SELECT object_id, sequence_id, object FROM last WHERE object_id = 0"
    94   |
    95   | #define MAX_INSTRUCTIONS 100
    96   |
    97   |
    98   | typedef struct Query_instruction_t {
    99   |   R_Type_t search_type;
    100  |   int  queryindex;/* index into the Query table showing origin of this entry */
    101  |   char *query_str;
    102  |   char *rx_keys;
    103  |   unsigned int rx_srch_mode;
    104  |   unsigned int rx_par_a;
    105  |   ip_space_t space;
    106  |   rx_fam_t family;
    107  | } Query_instruction;
    108  |
    109  | typedef struct Query_instructions_t {
    110  |   Query_instruction *instruction[MAX_INSTRUCTIONS];
    111  |   unsigned int filtered;
    112  |   unsigned int fast;
    113  |   unsigned int recursive;
    114  |   const Query_command *qc; /* pointer to the Query_command structure of this query */
    115  | } Query_instructions;
    116  |
    117  |
    118  | er_ret_t QI_execute(void *database_voidptr, Query_instructions *qis, Query_environ *qe, acc_st *acc_credit, acl_st *acl);
    119  | void QI_free(Query_instructions *qis);
    120  | Query_instructions *QI_new(const Query_command *qc, const Query_environ *qe);
    121  | char *QI_queries_to_string(Query_instructions *qis);
    122  |
    123  | #endif /* READ_QUERY_INSTRUCTIONS */