1    | #ifndef READ_QUERY_INSTRUCTIONS
2    | #define READ_QUERY_INSTRUCTIONS
3    | 
4    | /***************************************
5    |   $Revision: 1.32 $
6    | 
7    |   Query instruction module (qi)
8    |   config module.
9    | 
10   |   Status: NOT REVUED, NOT TESTED
11   | 
12   |   ******************/ /******************
13   |   Copyright (c) 1999,2000,2001,2002               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   | #include "ca_configFns.h"
43   | #include "ca_dictionary.h"
44   | #include "ca_macros.h"
45   | #include "ca_srcAttribs.h"
46   | 
47   | /*
48   | --- snipped from http://www.tcx.se/Manual/manual.html ---
49   | 
50   | 5.3 Functionality missing from MySQL
51   | 
52   | 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
53   | 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). 
54   | 
55   | 5.3.1 Sub-selects
56   | 
57   | The following will not yet work in MySQL: 
58   | 
59   | SELECT * FROM table1 WHERE id IN (SELECT id FROM table2);
60   | SELECT * FROM table1 WHERE id NOT IN (SELECT id FROM table2);
61   | 
62   | However, in many cases you can rewrite the query without a sub select: 
63   | 
64   | SELECT table1.* FROM table1,table2 WHERE table1.id=table2.id;
65   | SELECT table1.* FROM table1 LEFT JOIN table2 ON table1.id=table2.id where table2.id IS NULL
66   | 
67   | For more complicated sub queries you can create temporary tables to hold the sub query. 
68   | 
69   | 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
70   | contexts, however. 
71   | 
72   | --- end snip ---
73   | 
74   | Ie. Try using a LEFT JOIN to do the "NOT IN"/ "MINUS" equivalent.
75   | 
76   | */
77   | 
78   | /*
79   |   mysql optimizer is sometimes sub-optimal, 
80   |   therefore we force the join order with STRAIGHT_JOIN (MB, 2000/05/02)
81   | 
82   |   
83   | */
84   | 
85   | /* RIPE 6 */
86   | #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 ord87   | er_code" 
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   | #if 0
94   | #define Q_NO_OBJECTS  "SELECT object_id, sequence_id, object FROM last WHERE object_id = 0"
95   | #endif 
96   | 
97   | #define MAX_INSTRUCTIONS 100
98   | 
99   | 
100  | typedef struct Query_instruction_t {
101  |   R_Type_t search_type;
102  |   int  queryindex;/* index into the Query table showing origin of this entry */
103  |   char *query_str;
104  |   char *rx_keys;
105  |   unsigned int rx_srch_mode;
106  |   int rx_par_a;
107  |   ip_space_t space;
108  |   rx_fam_t family;
109  | } Query_instruction;
110  | 
111  | typedef struct Query_instructions_t {
112  |   Query_instruction *instruction[MAX_INSTRUCTIONS];
113  |   unsigned int filtered;
114  |   unsigned int fast;
115  |   unsigned int recursive;
116  |   const Query_command *qc; /* pointer to the Query_command structure of this query */
117  | } Query_instructions;
118  | 
119  | 
120  | er_ret_t QI_execute(ca_dbSource_t *dbhdl, Query_instructions *qis, Query_environ *qe, acc_st *acc_credit, acl_st *acl);
121  | void QI_free(Query_instructions *qis);
122  | Query_instructions *QI_new(const Query_command *qc, const Query_environ *qe);
123  | char *QI_queries_to_string(Query_instructions *qis);
124  | char *QI_fast_output(const char *str);
125  | 
126  | #endif /* READ_QUERY_INSTRUCTIONS */