1    | #ifndef READ_QUERY_INSTRUCTIONS
2    | #define READ_QUERY_INSTRUCTIONS
3    | 
4    | /***************************************
5    |   $Revision: 1.25 $
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   | #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 ord83   | er_code" 
84   | 
85   | #define Q_REC         "INSERT INTO %s SELECT pe_ro_id FROM %s IDS STRAIGHT_JOIN %s WHERE object_id = IDS.id"
86   | 
87   | #define Q_NO_OBJECTS  "SELECT object_id, sequence_id, object FROM last WHERE object_id = 0"
88   | 
89   | #define MAX_INSTRUCTIONS 100
90   | 
91   | 
92   | typedef struct Query_instruction_t {
93   |   R_Type_t search_type;
94   |   int  queryindex;/* index into the Query table showing origin of this entry */
95   |   char *query_str;
96   |   char *rx_keys;
97   |   unsigned int rx_srch_mode;
98   |   unsigned int rx_par_a;
99   |   ip_space_t space;
100  |   rx_fam_t family;
101  | } Query_instruction;
102  | 
103  | typedef struct Query_instructions_t {
104  |   Query_instruction *instruction[MAX_INSTRUCTIONS];
105  |   unsigned int filtered;
106  |   unsigned int fast;
107  |   unsigned int recursive;
108  |   const Query_command *qc; /* pointer to the Query_command structure of this query */
109  | } Query_instructions;
110  | 
111  | 
112  | void QI_execute(void *database_voidptr, Query_instructions *qis, Query_environ *qe, acc_st *acc_credit, acl_st *acl);
113  | void QI_free(Query_instructions *qis);
114  | Query_instructions *QI_new(const Query_command *qc, const Query_environ *qe);
115  | char *QI_queries_to_string(Query_instructions *qis);
116  | 
117  | #endif /* READ_QUERY_INSTRUCTIONS */