PostgreSQL Source Code  git master
oid2name.c
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1 /*
2  * oid2name, a PostgreSQL app to map OIDs on the filesystem
3  * to table and database names.
4  *
5  * Originally by
6  * B. Palmer, bpalmer@crimelabs.net 1-17-2001
7  *
8  * contrib/oid2name/oid2name.c
9  */
10 #include "postgres_fe.h"
11 
12 #include "catalog/pg_class_d.h"
13 #include "common/connect.h"
14 #include "common/logging.h"
15 #include "common/string.h"
16 #include "getopt_long.h"
17 #include "libpq-fe.h"
18 #include "pg_getopt.h"
19 
20 /* an extensible array to keep track of elements to show */
21 typedef struct
22 {
23  char **array;
24  int num;
25  int alloc;
26 } eary;
27 
28 /* these are the opts structures for command line params */
29 struct options
30 {
34 
35  bool quiet;
36  bool systables;
37  bool indexes;
38  bool nodb;
39  bool extended;
41 
42  char *dbname;
43  char *hostname;
44  char *port;
45  char *username;
46  const char *progname;
47 };
48 
49 /* function prototypes */
50 static void help(const char *progname);
51 void get_opts(int, char **, struct options *);
52 void add_one_elt(char *eltname, eary *eary);
53 char *get_comma_elts(eary *eary);
54 PGconn *sql_conn(struct options *);
55 int sql_exec(PGconn *, const char *sql, bool quiet);
56 void sql_exec_dumpalldbs(PGconn *, struct options *);
57 void sql_exec_dumpalltables(PGconn *, struct options *);
58 void sql_exec_searchtables(PGconn *, struct options *);
59 void sql_exec_dumpalltbspc(PGconn *, struct options *);
60 
61 /* function to parse command line options and check for some usage errors. */
62 void
63 get_opts(int argc, char **argv, struct options *my_opts)
64 {
65  static struct option long_options[] = {
66  {"dbname", required_argument, NULL, 'd'},
67  {"host", required_argument, NULL, 'h'},
68  {"host", required_argument, NULL, 'H'}, /* deprecated */
69  {"filenode", required_argument, NULL, 'f'},
70  {"indexes", no_argument, NULL, 'i'},
71  {"oid", required_argument, NULL, 'o'},
72  {"port", required_argument, NULL, 'p'},
73  {"quiet", no_argument, NULL, 'q'},
74  {"tablespaces", no_argument, NULL, 's'},
75  {"system-objects", no_argument, NULL, 'S'},
76  {"table", required_argument, NULL, 't'},
77  {"username", required_argument, NULL, 'U'},
78  {"version", no_argument, NULL, 'V'},
79  {"extended", no_argument, NULL, 'x'},
80  {"help", no_argument, NULL, '?'},
81  {NULL, 0, NULL, 0}
82  };
83 
84  int c;
85  const char *progname;
86  int optindex;
87 
88  pg_logging_init(argv[0]);
89  progname = get_progname(argv[0]);
90 
91  /* set the defaults */
92  my_opts->quiet = false;
93  my_opts->systables = false;
94  my_opts->indexes = false;
95  my_opts->nodb = false;
96  my_opts->extended = false;
97  my_opts->tablespaces = false;
98  my_opts->dbname = NULL;
99  my_opts->hostname = NULL;
100  my_opts->port = NULL;
101  my_opts->username = NULL;
102  my_opts->progname = progname;
103 
104  if (argc > 1)
105  {
106  if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
107  {
108  help(progname);
109  exit(0);
110  }
111  if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
112  {
113  puts("oid2name (PostgreSQL) " PG_VERSION);
114  exit(0);
115  }
116  }
117 
118  /* get opts */
119  while ((c = getopt_long(argc, argv, "d:f:h:H:io:p:qsSt:U:x", long_options, &optindex)) != -1)
120  {
121  switch (c)
122  {
123  /* specify the database */
124  case 'd':
125  my_opts->dbname = pg_strdup(optarg);
126  break;
127 
128  /* specify one filenode to show */
129  case 'f':
130  add_one_elt(optarg, my_opts->filenodes);
131  break;
132 
133  /* host to connect to */
134  case 'H': /* deprecated */
135  case 'h':
136  my_opts->hostname = pg_strdup(optarg);
137  break;
138 
139  /* also display indexes */
140  case 'i':
141  my_opts->indexes = true;
142  break;
143 
144  /* specify one Oid to show */
145  case 'o':
146  add_one_elt(optarg, my_opts->oids);
147  break;
148 
149  /* port to connect to on remote host */
150  case 'p':
151  my_opts->port = pg_strdup(optarg);
152  break;
153 
154  /* don't show headers */
155  case 'q':
156  my_opts->quiet = true;
157  break;
158 
159  /* dump tablespaces only */
160  case 's':
161  my_opts->tablespaces = true;
162  break;
163 
164  /* display system tables */
165  case 'S':
166  my_opts->systables = true;
167  break;
168 
169  /* specify one tablename to show */
170  case 't':
171  add_one_elt(optarg, my_opts->tables);
172  break;
173 
174  /* username */
175  case 'U':
176  my_opts->username = pg_strdup(optarg);
177  break;
178 
179  /* display extra columns */
180  case 'x':
181  my_opts->extended = true;
182  break;
183 
184  default:
185  fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
186  exit(1);
187  }
188  }
189 
190  if (optind < argc)
191  {
192  fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
193  progname, argv[optind]);
194  fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
195  exit(1);
196  }
197 }
198 
199 static void
200 help(const char *progname)
201 {
202  printf("%s helps examining the file structure used by PostgreSQL.\n\n"
203  "Usage:\n"
204  " %s [OPTION]...\n"
205  "\nOptions:\n"
206  " -f, --filenode=FILENODE show info for table with given file node\n"
207  " -i, --indexes show indexes and sequences too\n"
208  " -o, --oid=OID show info for table with given OID\n"
209  " -q, --quiet quiet (don't show headers)\n"
210  " -s, --tablespaces show all tablespaces\n"
211  " -S, --system-objects show system objects too\n"
212  " -t, --table=TABLE show info for named table\n"
213  " -V, --version output version information, then exit\n"
214  " -x, --extended extended (show additional columns)\n"
215  " -?, --help show this help, then exit\n"
216  "\nConnection options:\n"
217  " -d, --dbname=DBNAME database to connect to\n"
218  " -h, --host=HOSTNAME database server host or socket directory\n"
219  " -H same as -h, deprecated option\n"
220  " -p, --port=PORT database server port number\n"
221  " -U, --username=USERNAME connect as specified database user\n"
222  "\nThe default action is to show all database OIDs.\n\n"
223  "Report bugs to <%s>.\n"
224  "%s home page: <%s>\n",
225  progname, progname, PACKAGE_BUGREPORT, PACKAGE_NAME, PACKAGE_URL);
226 }
227 
228 /*
229  * add_one_elt
230  *
231  * Add one element to a (possibly empty) eary struct.
232  */
233 void
234 add_one_elt(char *eltname, eary *eary)
235 {
236  if (eary->alloc == 0)
237  {
238  eary ->alloc = 8;
239  eary ->array = (char **) pg_malloc(8 * sizeof(char *));
240  }
241  else if (eary->num >= eary->alloc)
242  {
243  eary ->alloc *= 2;
244  eary ->array = (char **) pg_realloc(eary->array,
245  eary->alloc * sizeof(char *));
246  }
247 
248  eary ->array[eary->num] = pg_strdup(eltname);
249  eary ->num++;
250 }
251 
252 /*
253  * get_comma_elts
254  *
255  * Return the elements of an eary as a (freshly allocated) single string, in
256  * single quotes, separated by commas and properly escaped for insertion in an
257  * SQL statement.
258  */
259 char *
261 {
262  char *ret,
263  *ptr;
264  int i,
265  length = 0;
266 
267  if (eary->num == 0)
268  return pg_strdup("");
269 
270  /*
271  * PQescapeString wants 2 * length + 1 bytes of breath space. Add two
272  * chars per element for the single quotes and one for the comma.
273  */
274  for (i = 0; i < eary->num; i++)
275  length += strlen(eary->array[i]);
276 
277  ret = (char *) pg_malloc(length * 2 + 4 * eary->num);
278  ptr = ret;
279 
280  for (i = 0; i < eary->num; i++)
281  {
282  if (i != 0)
283  sprintf(ptr++, ",");
284  sprintf(ptr++, "'");
285  ptr += PQescapeString(ptr, eary->array[i], strlen(eary->array[i]));
286  sprintf(ptr++, "'");
287  }
288 
289  return ret;
290 }
291 
292 /* establish connection with database. */
293 PGconn *
294 sql_conn(struct options *my_opts)
295 {
296  PGconn *conn;
297  char *password = NULL;
298  bool new_pass;
299  PGresult *res;
300 
301  /*
302  * Start the connection. Loop until we have a password if requested by
303  * backend.
304  */
305  do
306  {
307 #define PARAMS_ARRAY_SIZE 7
308 
309  const char *keywords[PARAMS_ARRAY_SIZE];
310  const char *values[PARAMS_ARRAY_SIZE];
311 
312  keywords[0] = "host";
313  values[0] = my_opts->hostname;
314  keywords[1] = "port";
315  values[1] = my_opts->port;
316  keywords[2] = "user";
317  values[2] = my_opts->username;
318  keywords[3] = "password";
319  values[3] = password;
320  keywords[4] = "dbname";
321  values[4] = my_opts->dbname;
322  keywords[5] = "fallback_application_name";
323  values[5] = my_opts->progname;
324  keywords[6] = NULL;
325  values[6] = NULL;
326 
327  new_pass = false;
328  conn = PQconnectdbParams(keywords, values, true);
329 
330  if (!conn)
331  {
332  pg_log_error("could not connect to database %s",
333  my_opts->dbname);
334  exit(1);
335  }
336 
337  if (PQstatus(conn) == CONNECTION_BAD &&
339  !password)
340  {
341  PQfinish(conn);
342  password = simple_prompt("Password: ", false);
343  new_pass = true;
344  }
345  } while (new_pass);
346 
347  /* check to see that the backend connection was successfully made */
348  if (PQstatus(conn) == CONNECTION_BAD)
349  {
350  pg_log_error("could not connect to database %s: %s",
351  my_opts->dbname, PQerrorMessage(conn));
352  PQfinish(conn);
353  exit(1);
354  }
355 
357  if (PQresultStatus(res) != PGRES_TUPLES_OK)
358  {
359  pg_log_error("could not clear search_path: %s",
360  PQerrorMessage(conn));
361  PQclear(res);
362  PQfinish(conn);
363  exit(-1);
364  }
365  PQclear(res);
366 
367  /* return the conn if good */
368  return conn;
369 }
370 
371 /*
372  * Actual code to make call to the database and print the output data.
373  */
374 int
375 sql_exec(PGconn *conn, const char *todo, bool quiet)
376 {
377  PGresult *res;
378 
379  int nfields;
380  int nrows;
381  int i,
382  j,
383  l;
384  int *length;
385  char *pad;
386 
387  /* make the call */
388  res = PQexec(conn, todo);
389 
390  /* check and deal with errors */
391  if (!res || PQresultStatus(res) > 2)
392  {
393  pg_log_error("query failed: %s", PQerrorMessage(conn));
394  pg_log_error("query was: %s", todo);
395 
396  PQclear(res);
397  PQfinish(conn);
398  exit(-1);
399  }
400 
401  /* get the number of fields */
402  nrows = PQntuples(res);
403  nfields = PQnfields(res);
404 
405  /* for each field, get the needed width */
406  length = (int *) pg_malloc(sizeof(int) * nfields);
407  for (j = 0; j < nfields; j++)
408  length[j] = strlen(PQfname(res, j));
409 
410  for (i = 0; i < nrows; i++)
411  {
412  for (j = 0; j < nfields; j++)
413  {
414  l = strlen(PQgetvalue(res, i, j));
415  if (l > length[j])
416  length[j] = strlen(PQgetvalue(res, i, j));
417  }
418  }
419 
420  /* print a header */
421  if (!quiet)
422  {
423  for (j = 0, l = 0; j < nfields; j++)
424  {
425  fprintf(stdout, "%*s", length[j] + 2, PQfname(res, j));
426  l += length[j] + 2;
427  }
428  fprintf(stdout, "\n");
429  pad = (char *) pg_malloc(l + 1);
430  MemSet(pad, '-', l);
431  pad[l] = '\0';
432  fprintf(stdout, "%s\n", pad);
433  free(pad);
434  }
435 
436  /* for each row, dump the information */
437  for (i = 0; i < nrows; i++)
438  {
439  for (j = 0; j < nfields; j++)
440  fprintf(stdout, "%*s", length[j] + 2, PQgetvalue(res, i, j));
441  fprintf(stdout, "\n");
442  }
443 
444  /* cleanup */
445  PQclear(res);
446  free(length);
447 
448  return 0;
449 }
450 
451 /*
452  * Dump all databases. There are no system objects to worry about.
453  */
454 void
456 {
457  char todo[1024];
458 
459  /* get the oid and database name from the system pg_database table */
460  snprintf(todo, sizeof(todo),
461  "SELECT d.oid AS \"Oid\", datname AS \"Database Name\", "
462  "spcname AS \"Tablespace\" FROM pg_catalog.pg_database d JOIN pg_catalog.pg_tablespace t ON "
463  "(dattablespace = t.oid) ORDER BY 2");
464 
465  sql_exec(conn, todo, opts->quiet);
466 }
467 
468 /*
469  * Dump all tables, indexes and sequences in the current database.
470  */
471 void
473 {
474  char todo[1024];
475  char *addfields = ",c.oid AS \"Oid\", nspname AS \"Schema\", spcname as \"Tablespace\" ";
476 
477  snprintf(todo, sizeof(todo),
478  "SELECT pg_catalog.pg_relation_filenode(c.oid) as \"Filenode\", relname as \"Table Name\" %s "
479  "FROM pg_catalog.pg_class c "
480  " LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace "
481  " LEFT JOIN pg_catalog.pg_database d ON d.datname = pg_catalog.current_database(),"
482  " pg_catalog.pg_tablespace t "
483  "WHERE relkind IN (" CppAsString2(RELKIND_RELATION) ","
484  CppAsString2(RELKIND_MATVIEW) "%s%s) AND "
485  " %s"
486  " t.oid = CASE"
487  " WHEN reltablespace <> 0 THEN reltablespace"
488  " ELSE dattablespace"
489  " END "
490  "ORDER BY relname",
491  opts->extended ? addfields : "",
492  opts->indexes ? "," CppAsString2(RELKIND_INDEX) "," CppAsString2(RELKIND_SEQUENCE) : "",
493  opts->systables ? "," CppAsString2(RELKIND_TOASTVALUE) : "",
494  opts->systables ? "" : "n.nspname NOT IN ('pg_catalog', 'information_schema') AND n.nspname !~ '^pg_toast' AND");
495 
496  sql_exec(conn, todo, opts->quiet);
497 }
498 
499 /*
500  * Show oid, filenode, name, schema and tablespace for each of the
501  * given objects in the current database.
502  */
503 void
505 {
506  char *todo;
507  char *qualifiers,
508  *ptr;
509  char *comma_oids,
510  *comma_filenodes,
511  *comma_tables;
512  bool written = false;
513  char *addfields = ",c.oid AS \"Oid\", nspname AS \"Schema\", spcname as \"Tablespace\" ";
514 
515  /* get tables qualifiers, whether names, filenodes, or OIDs */
516  comma_oids = get_comma_elts(opts->oids);
517  comma_tables = get_comma_elts(opts->tables);
518  comma_filenodes = get_comma_elts(opts->filenodes);
519 
520  /* 80 extra chars for SQL expression */
521  qualifiers = (char *) pg_malloc(strlen(comma_oids) + strlen(comma_tables) +
522  strlen(comma_filenodes) + 80);
523  ptr = qualifiers;
524 
525  if (opts->oids->num > 0)
526  {
527  ptr += sprintf(ptr, "c.oid IN (%s)", comma_oids);
528  written = true;
529  }
530  if (opts->filenodes->num > 0)
531  {
532  if (written)
533  ptr += sprintf(ptr, " OR ");
534  ptr += sprintf(ptr, "pg_catalog.pg_relation_filenode(c.oid) IN (%s)", comma_filenodes);
535  written = true;
536  }
537  if (opts->tables->num > 0)
538  {
539  if (written)
540  ptr += sprintf(ptr, " OR ");
541  sprintf(ptr, "c.relname ~~ ANY (ARRAY[%s])", comma_tables);
542  }
543  free(comma_oids);
544  free(comma_tables);
545  free(comma_filenodes);
546 
547  /* now build the query */
548  todo = psprintf("SELECT pg_catalog.pg_relation_filenode(c.oid) as \"Filenode\", relname as \"Table Name\" %s\n"
549  "FROM pg_catalog.pg_class c\n"
550  " LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace\n"
551  " LEFT JOIN pg_catalog.pg_database d ON d.datname = pg_catalog.current_database(),\n"
552  " pg_catalog.pg_tablespace t\n"
553  "WHERE relkind IN (" CppAsString2(RELKIND_RELATION) ","
554  CppAsString2(RELKIND_MATVIEW) ","
555  CppAsString2(RELKIND_INDEX) ","
556  CppAsString2(RELKIND_SEQUENCE) ","
557  CppAsString2(RELKIND_TOASTVALUE) ") AND\n"
558  " t.oid = CASE\n"
559  " WHEN reltablespace <> 0 THEN reltablespace\n"
560  " ELSE dattablespace\n"
561  " END AND\n"
562  " (%s)\n"
563  "ORDER BY relname\n",
564  opts->extended ? addfields : "",
565  qualifiers);
566 
567  free(qualifiers);
568 
569  sql_exec(conn, todo, opts->quiet);
570 }
571 
572 void
574 {
575  char todo[1024];
576 
577  snprintf(todo, sizeof(todo),
578  "SELECT oid AS \"Oid\", spcname as \"Tablespace Name\"\n"
579  "FROM pg_catalog.pg_tablespace");
580 
581  sql_exec(conn, todo, opts->quiet);
582 }
583 
584 int
585 main(int argc, char **argv)
586 {
587  struct options *my_opts;
588  PGconn *pgconn;
589 
590  my_opts = (struct options *) pg_malloc(sizeof(struct options));
591 
592  my_opts->oids = (eary *) pg_malloc(sizeof(eary));
593  my_opts->tables = (eary *) pg_malloc(sizeof(eary));
594  my_opts->filenodes = (eary *) pg_malloc(sizeof(eary));
595 
596  my_opts->oids->num = my_opts->oids->alloc = 0;
597  my_opts->tables->num = my_opts->tables->alloc = 0;
598  my_opts->filenodes->num = my_opts->filenodes->alloc = 0;
599 
600  /* parse the opts */
601  get_opts(argc, argv, my_opts);
602 
603  if (my_opts->dbname == NULL)
604  {
605  my_opts->dbname = "postgres";
606  my_opts->nodb = true;
607  }
608  pgconn = sql_conn(my_opts);
609 
610  /* display only tablespaces */
611  if (my_opts->tablespaces)
612  {
613  if (!my_opts->quiet)
614  printf("All tablespaces:\n");
615  sql_exec_dumpalltbspc(pgconn, my_opts);
616 
617  PQfinish(pgconn);
618  exit(0);
619  }
620 
621  /* display the given elements in the database */
622  if (my_opts->oids->num > 0 ||
623  my_opts->tables->num > 0 ||
624  my_opts->filenodes->num > 0)
625  {
626  if (!my_opts->quiet)
627  printf("From database \"%s\":\n", my_opts->dbname);
628  sql_exec_searchtables(pgconn, my_opts);
629 
630  PQfinish(pgconn);
631  exit(0);
632  }
633 
634  /* no elements given; dump the given database */
635  if (my_opts->dbname && !my_opts->nodb)
636  {
637  if (!my_opts->quiet)
638  printf("From database \"%s\":\n", my_opts->dbname);
639  sql_exec_dumpalltables(pgconn, my_opts);
640 
641  PQfinish(pgconn);
642  exit(0);
643  }
644 
645  /* no database either; dump all databases */
646  if (!my_opts->quiet)
647  printf("All databases:\n");
648  sql_exec_dumpalldbs(pgconn, my_opts);
649 
650  PQfinish(pgconn);
651  return 0;
652 }
int sql_exec(PGconn *, const char *sql, bool quiet)
Definition: oid2name.c:375
int PQnfields(const PGresult *res)
Definition: fe-exec.c:2777
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Definition: fe-connect.c:6666
Definition: oid2name.c:21
void sql_exec_dumpalltbspc(PGconn *, struct options *)
Definition: oid2name.c:573
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Definition: oid2name.c:294
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Definition: oid2name.c:63
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#define PARAMS_ARRAY_SIZE
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#define printf(...)
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Definition: oid2name.c:43
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Definition: oid2name.c:38
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Definition: oid2name.c:45
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Definition: fe-exec.c:2692
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Definition: oid2name.c:585
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bool tablespaces
Definition: oid2name.c:40
char ** array
Definition: oid2name.c:23
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Definition: oid2name.c:200
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Definition: oid2name.c:455
#define sprintf
Definition: port.h:195
#define required_argument
Definition: getopt_long.h:25
int optind
Definition: getopt.c:50
eary * oids
Definition: oid2name.c:32
PGconn * conn
Definition: streamutil.c:54
bool indexes
Definition: oid2name.c:37
char * c
bool systables
Definition: oid2name.c:36
char * pg_strdup(const char *in)
Definition: fe_memutils.c:85
static char * password
Definition: streamutil.c:53
void * pg_realloc(void *ptr, size_t size)
Definition: fe_memutils.c:65
eary * tables
Definition: oid2name.c:31
#define CppAsString2(x)
Definition: c.h:222
#define no_argument
Definition: getopt_long.h:24
void add_one_elt(char *eltname, eary *eary)
Definition: oid2name.c:234
const char * progname
Definition: oid2name.c:46
char * dbname
Definition: oid2name.c:42
void PQclear(PGresult *res)
Definition: fe-exec.c:694
#define free(a)
Definition: header.h:65
bool quiet
Definition: oid2name.c:35
bool extended
Definition: oid2name.c:39
char * get_comma_elts(eary *eary)
Definition: oid2name.c:260
#define ALWAYS_SECURE_SEARCH_PATH_SQL
Definition: connect.h:25
static Datum values[MAXATTR]
Definition: bootstrap.c:165
int alloc
Definition: oid2name.c:25
int PQconnectionNeedsPassword(const PGconn *conn)
Definition: fe-connect.c:6700
void sql_exec_searchtables(PGconn *, struct options *)
Definition: oid2name.c:504
char * optarg
Definition: getopt.c:52
char * port
Definition: oid2name.c:44
int i
PGresult * PQexec(PGconn *conn, const char *query)
Definition: fe-exec.c:1939
eary * filenodes
Definition: oid2name.c:33
ConnStatusType PQstatus(const PGconn *conn)
Definition: fe-connect.c:6613
#define snprintf
Definition: port.h:193
#define _(x)
Definition: elog.c:88
int num
Definition: oid2name.c:24
void sql_exec_dumpalltables(PGconn *, struct options *)
Definition: oid2name.c:472