/[rserv]/lib/rserv.c
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revision 1.2 by dpavlin, Tue Aug 5 09:52:39 2003 UTC revision 1.3 by dpavlin, Wed Aug 6 16:14:53 2003 UTC
# Line 31  static int     debug = 0; Line 31  static int     debug = 0;
31  static char *OutputValue(char *key, char *buf, int size);  static char *OutputValue(char *key, char *buf, int size);
32    
33  #ifdef PG_FUNCTION_INFO_V1  #ifdef PG_FUNCTION_INFO_V1
34  Datum _rserv_log_(PG_FUNCTION_ARGS)  Datum
35    _rserv_log_(PG_FUNCTION_ARGS)
36  #else  #else
37  HeapTuple _rserv_log_()  HeapTuple
38    _rserv_log_()
39  #endif  #endif
40  {  {
41    Trigger    *trigger;          /* to get trigger name */          Trigger    *trigger;            /* to get trigger name */
42    int           nargs;                  /* # of args specified in CREATE TRIGGER */          int                     nargs;                  /* # of args specified in CREATE TRIGGER */
43    char    **args;                       /* argument: argnum */          char      **args;                       /* argument: argnum */
44    Relation      rel;                    /* triggered relation */          Relation        rel;                    /* triggered relation */
45    HeapTuple     tuple;                  /* tuple to return */          HeapTuple       tuple;                  /* tuple to return */
46    HeapTuple     newtuple = NULL;        /* tuple to return */          HeapTuple       newtuple = NULL;        /* tuple to return */
47    TupleDesc     tupdesc;                /* tuple description */          TupleDesc       tupdesc;                /* tuple description */
48    int                   keynum;          int                     keynum;
49    char     *key;          char       *key;
50    char     *okey;          char       *okey;
51    char     *newkey = NULL;          char       *newkey = NULL;
52    int                   deleted, inserted, updated;          int                     deleted, inserted, updated;
53    char          sql[8192];          char            sql[8192];
54    char          outbuf[8192];          char            outbuf[8192];
55    char          oidbuf[64];          char            oidbuf[64];
56    int                   ret;          int                     ret;
57    
58    /* Called by trigger manager ? */          /* Called by trigger manager ? */
59    if (!CurrentTriggerData)          if (!CurrentTriggerData)
60      elog(ERROR, "_rserv_log_: triggers are not initialized");                  elog(ERROR, "_rserv_log_: triggers are not initialized");
61      
62    /* Should be called for ROW trigger */          /* Should be called for ROW trigger */
63    if (TRIGGER_FIRED_FOR_STATEMENT(CurrentTriggerData->tg_event))          if (TRIGGER_FIRED_FOR_STATEMENT(CurrentTriggerData->tg_event))
64      elog(ERROR, "_rserv_log_: can't process STATEMENT events");                  elog(ERROR, "_rserv_log_: can't process STATEMENT events");
65    
66    tuple = CurrentTriggerData->tg_trigtuple;          tuple = CurrentTriggerData->tg_trigtuple;
67    
68    trigger = CurrentTriggerData->tg_trigger;          trigger = CurrentTriggerData->tg_trigger;
69    nargs = trigger->tgnargs;          nargs = trigger->tgnargs;
70    args = trigger->tgargs;          args = trigger->tgargs;
71    
72    if (nargs != 1)                               /* odd number of arguments! */          if (nargs != 1)                         /* odd number of arguments! */
73      elog(ERROR, "_rserv_log_: need in *one* argument");                  elog(ERROR, "_rserv_log_: need in *one* argument");
74      
75    keynum = atoi(args[0]);          keynum = atoi(args[0]);
76      
77    if (keynum < 0 && keynum != ObjectIdAttributeNumber)          if (keynum < 0 && keynum != ObjectIdAttributeNumber)
78      elog(ERROR, "_rserv_log_: invalid keynum %d", keynum);                  elog(ERROR, "_rserv_log_: invalid keynum %d", keynum);
79      
80    rel = CurrentTriggerData->tg_relation;          rel = CurrentTriggerData->tg_relation;
81    tupdesc = rel->rd_att;          tupdesc = rel->rd_att;
82      
83    deleted  = (TRIGGER_FIRED_BY_DELETE(CurrentTriggerData->tg_event)) ? 1 : 0;          deleted = (TRIGGER_FIRED_BY_DELETE(CurrentTriggerData->tg_event)) ?
84    inserted = (TRIGGER_FIRED_BY_INSERT(CurrentTriggerData->tg_event)) ? 1 : 0;                  1 : 0;
85    //  updated  = (TRIGGER_FIRED_BY_UPDATE(CurrentTriggerData->tg_event)) ? 1 : 0;  
86            inserted = (TRIGGER_FIRED_BY_INSERT(CurrentTriggerData->tg_event)) ? 1 : 0;
87    updated = 0;  
88    if (TRIGGER_FIRED_BY_UPDATE(CurrentTriggerData->tg_event)) {          updated = 0;
89      updated = 1;          if (TRIGGER_FIRED_BY_UPDATE(CurrentTriggerData->tg_event)) {
90      newtuple = CurrentTriggerData->tg_newtuple;                  updated = 1;
91    }                  newtuple = CurrentTriggerData->tg_newtuple;
92            }
93    
94  #ifndef PG_FUNCTION_INFO_V1  #ifndef PG_FUNCTION_INFO_V1
95      
96    /*          /*
97     * Setting CurrentTriggerData to NULL prevents direct calls to trigger           * Setting CurrentTriggerData to NULL prevents direct calls to trigger
98     * functions in queries. Normally, trigger functions have to be called           * functions in queries. Normally, trigger functions have to be called
99     * by trigger manager code only.           * by trigger manager code only.
100     */           */
101    CurrentTriggerData = NULL;          CurrentTriggerData = NULL;
102  #endif  #endif
     
   /* Connect to SPI manager */  
   if ((ret = SPI_connect()) < 0)  
     elog(ERROR, "_rserv_log_: SPI_connect returned %d", ret);  
     
   if (keynum == ObjectIdAttributeNumber) {  
     sprintf(oidbuf, "%u", tuple->t_data->t_oid);  
     key = oidbuf;  
   } else {  
     key = SPI_getvalue(tuple, tupdesc, keynum);  
   }  
   
   if (key == NULL)  
     elog(ERROR, "_rserv_log_: key must be not null");  
     
   if (newtuple && keynum != ObjectIdAttributeNumber) {  
     newkey = SPI_getvalue(newtuple, tupdesc, keynum);  
     if (newkey == NULL)  
       elog(ERROR, "_rserv_log_: key must be not null");  
     if (strcmp(newkey, key) == 0)  
       newkey = NULL;  
     else  
       deleted = 1;              /* old key was deleted */  
   }  
     
   if (strpbrk(key, "\\  \n'"))  
     okey = OutputValue(key, outbuf, sizeof(outbuf));  
   else  
     okey = key;  
   
   
   /**  
      versao onde verifica-se primeiro se o registro existe  
      para decidir se faz insert ou update em _RSERV_LOG_  
   **********************/  
   
 #ifdef ASKFORUPDATE  
   sprintf(sql, "SELECT true WHERE EXISTS (SELECT logid from _RSERV_LOG_ "  
           "WHERE reloid = %u AND key = '%s')",  
           rel->rd_id, okey);  
   
   if (debug)  
     elog(NOTICE, sql);  
   
   if ((ret = SPI_exec(sql, 1)) < 0) {  
     elog(ERROR, "_rserv_log_: SPI_exec(update) returned %d", ret);  
   }  
   
   if (SPI_processed > 0) {  
     sprintf(sql, "update _RSERV_LOG_ set logid = %d, logtime = now(), "  
             "insert = %d, update = %d, delete = %d where reloid = %u "  
             "and key = '%s'",  
             GetCurrentTransactionId(),  
             inserted, updated, deleted, rel->rd_id, okey);  
       
     if (debug)  
       elog(NOTICE, sql);  
       
     ret = SPI_exec(sql, 0);  
       
     if (ret < 0)  
       elog(ERROR, "_rserv_log_: SPI_exec(update) returned %d", ret);  
       
     if (SPI_processed > 1)  
       elog(ERROR, "_rserv_log_: duplicate tuples");  
   } else {  
     sprintf(sql, "insert into _RSERV_LOG_ "  
             "(reloid, logid, logtime, insert, update, delete, key) "  
             "values (%u, %d, now(), %d, %d, %d, '%s')",  
             rel->rd_id, GetCurrentTransactionId(),  
             inserted, updated, deleted, okey);  
       
     if (debug)  
       elog(NOTICE, sql);  
       
     ret = SPI_exec(sql, 0);  
       
     if (ret < 0)  
       elog(ERROR, "_rserv_log_: SPI_exec(insert) returned %d", ret);  
   }  
103    
104  #else          /* Connect to SPI manager */
105            if ((ret = SPI_connect()) < 0)
106    sprintf(sql, "update _RSERV_LOG_ set logid = %d, logtime = now(), "                  elog(ERROR, "_rserv_log_: SPI_connect returned %d", ret);
107            "insert = %d, update = %d, delete = %d where reloid = %u "  
108            "and key = '%s'",          if (keynum == ObjectIdAttributeNumber)
109            GetCurrentTransactionId(),          {
110            inserted, updated, deleted, rel->rd_id, okey);                  snprintf(oidbuf, sizeof(oidbuf), "%u", HeapTupleGetOid(tuple));
111                      key = oidbuf;
112    if (debug)          }
113      elog(NOTICE, sql);          else
114                      key = SPI_getvalue(tuple, tupdesc, keynum);
115    ret = SPI_exec(sql, 0);  
116              if (key == NULL)
117    if (ret < 0)                  elog(ERROR, "_rserv_log_: key must be not null");
118      elog(ERROR, "_rserv_log_: SPI_exec(update) returned %d", ret);  
119              if (newtuple && keynum != ObjectIdAttributeNumber)
120              {
121    /*                  newkey = SPI_getvalue(newtuple, tupdesc, keynum);
122     * If no tuple was UPDATEd then do INSERT...                  if (newkey == NULL)
123     */                          elog(ERROR, "_rserv_log_: key must be not null");
124                    if (strcmp(newkey, key) == 0)
125                              newkey = NULL;
126    if (SPI_processed > 1)                  else
127      elog(ERROR, "_rserv_log_: duplicate tuples");                          deleted = 1;            /* old key was deleted */
128    else if (SPI_processed == 0) {          }
129      sprintf(sql, "insert into _RSERV_LOG_ "  
130              "(reloid, logid, logtime, insert, update, delete, key) "          if (strpbrk(key, "\\    \n'"))
131              "values (%u, %d, now(), %d, %d, %d, '%s')",                  okey = OutputValue(key, outbuf, sizeof(outbuf));
132              rel->rd_id, GetCurrentTransactionId(),          else
133              inserted, updated, deleted, okey);                  okey = key;
134        
135      if (debug)          snprintf(sql, 8192, "update _RSERV_LOG_ set logid = %d, logtime = now(), "
136        elog(NOTICE, sql);                          "insert = %d, update = %d, delete = %d where reloid = %u and key = '%s'",
137                                GetCurrentTransactionId(), inserted, updated, deleted, rel->rd_id, okey);
138      ret = SPI_exec(sql, 0);  
139                if (debug)
140      if (ret < 0)                  elog(DEBUG3, "sql: %s", sql);
141        elog(ERROR, "_rserv_log_: SPI_exec(insert) returned %d", ret);  
142    }          ret = SPI_exec(sql, 0);
143      
144  #endif              if (ret < 0)
145                    elog(ERROR, "_rserv_log_: SPI_exec(update) returned %d", ret);
146    if (okey != key && okey != outbuf)  
147      pfree(okey);          /*
148               * If no tuple was UPDATEd then do INSERT...
149    if (newkey) {           */
150      if (strpbrk(newkey, "\\     \n'"))          if (SPI_processed > 1)
151        okey = OutputValue(newkey, outbuf, sizeof(outbuf));                  elog(ERROR, "_rserv_log_: duplicate tuples");
152      else          else if (SPI_processed == 0)
153        okey = newkey;          {
154                        snprintf(sql, 8192, "insert into _RSERV_LOG_ "
155      sprintf(sql, "insert into _RSERV_LOG_ "                                  "(reloid, logid, logtime, insert, update, delete, key) "
156              "(reloid, logid, logtime, insert, update, delete, key) "                                  "values (%u, %d, now(), %d, %d, %d, '%s')",
157              "values (%u, %d, now(), %d, %d, 0, '%s')",                                   rel->rd_id, GetCurrentTransactionId(),
158              rel->rd_id, GetCurrentTransactionId(), inserted, updated, okey);                                  inserted, updated, deleted, okey);
159        
160      if (debug)                  if (debug)
161        elog(NOTICE, sql);                          elog(DEBUG3, "sql: %s", sql);
162        
163      ret = SPI_exec(sql, 0);                  ret = SPI_exec(sql, 0);
164        
165      if (ret < 0)                  if (ret < 0)
166        elog(ERROR, "_rserv_log_: SPI_exec returned %d", ret);                          elog(ERROR, "_rserv_log_: SPI_exec(insert) returned %d", ret);
167                }
168      if (okey != newkey && okey != outbuf)  
169        pfree(okey);          if (okey != key && okey != outbuf)
170    }                  pfree(okey);
171      
172    SPI_finish();          if (newkey)
173              {
174                    if (strpbrk(newkey, "\\ \n'"))
175                            okey = OutputValue(newkey, outbuf, sizeof(outbuf));
176                    else
177                            okey = newkey;
178    
179                    snprintf(sql, 8192, "insert into _RSERV_LOG_ "
180                                     "(reloid, logid, logtime, insert, update, deleted, key) "
181                                     "values (%u, %d, now(), %d, %d, 0, '%s')",
182                                     rel->rd_id, GetCurrentTransactionId(), inserted, updated, okey);
183    
184                    if (debug)
185                            elog(DEBUG3, "sql: %s", sql);
186    
187                    ret = SPI_exec(sql, 0);
188    
189                    if (ret < 0)
190                            elog(ERROR, "_rserv_log_: SPI_exec returned %d", ret);
191    
192                    if (okey != newkey && okey != outbuf)
193                            pfree(okey);
194            }
195    
196            SPI_finish();
197    
198  #ifdef PG_FUNCTION_INFO_V1  #ifdef PG_FUNCTION_INFO_V1
199    return (PointerGetDatum(tuple));          return (PointerGetDatum(tuple));
200  #else  #else
201    return (tuple);          return (tuple);
202  #endif  #endif
203  }  }
204    
# Line 278  _rserv_sync_(int32 server) Line 225  _rserv_sync_(int32 server)
225          buf[0] = 0;          buf[0] = 0;
226          for (xcnt = 0; xcnt < SerializableSnapshot->xcnt; xcnt++)          for (xcnt = 0; xcnt < SerializableSnapshot->xcnt; xcnt++)
227          {          {
228                  sprintf(buf + strlen(buf), "%s%u", (xcnt) ? ", " : "",                  snprintf(buf + strlen(buf), 8192 - strlen(buf),
229                                  SerializableSnapshot->xip[xcnt]);                                   "%s%u", (xcnt) ? ", " : "",
230                                     SerializableSnapshot->xip[xcnt]);
231          }          }
232    
233          if ((ret = SPI_connect()) < 0)          if ((ret = SPI_connect()) < 0)
234                  elog(ERROR, "_rserv_sync_: SPI_connect returned %d", ret);                  elog(ERROR, "_rserv_sync_: SPI_connect returned %d", ret);
235    
236          sprintf(sql, "insert into _RSERV_SYNC_ "          snprintf(sql, 8192, "insert into _RSERV_SYNC_ "
237                          "(server, syncid, synctime, status, minid, maxid, active) "                           "(server, syncid, synctime, status, minid, maxid, active) "
238            "values (%u, currval('_rserv_sync_seq_'), now(), 0, %d, %d, '%s')",            "values (%u, currval('_rserv_sync_seq_'), now(), 0, %d, %d, '%s')",
239                          server, SerializableSnapshot->xmin, SerializableSnapshot->xmax, active);                           server, SerializableSnapshot->xmin, SerializableSnapshot->xmax, active);
240    
241          ret = SPI_exec(sql, 0);          ret = SPI_exec(sql, 0);
242    

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