mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-19 02:53:27 +02:00
203 lines
4.6 KiB
C
203 lines
4.6 KiB
C
/* -------------------------------------------------------------------------
|
|
* pg_dumplo
|
|
*
|
|
* $Header: /cvsroot/pgsql/contrib/pg_dumplo/Attic/lo_export.c,v 1.11 2002/09/05 21:01:16 tgl Exp $
|
|
*
|
|
* Karel Zak 1999-2000
|
|
* -------------------------------------------------------------------------
|
|
*/
|
|
|
|
#include "postgres_fe.h"
|
|
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "libpq-fe.h"
|
|
#include "libpq/libpq-fs.h"
|
|
|
|
#include "pg_dumplo.h"
|
|
|
|
extern int errno;
|
|
|
|
|
|
void
|
|
load_lolist(LODumpMaster * pgLO)
|
|
{
|
|
LOlist *ll;
|
|
int i;
|
|
int n;
|
|
|
|
/*
|
|
* Now find any candidate tables who have columns of type oid.
|
|
*
|
|
* NOTE: System tables including pg_largeobject will be ignored.
|
|
* Otherwise we'd end up dumping all LOs, referenced or not.
|
|
*
|
|
* NOTE: the system oid column is ignored, as it has attnum < 1. This
|
|
* shouldn't matter for correctness, but it saves time.
|
|
*/
|
|
pgLO->res = PQexec(pgLO->conn,
|
|
"SELECT c.relname, a.attname "
|
|
"FROM pg_class c, pg_attribute a, pg_type t "
|
|
"WHERE a.attnum > 0 "
|
|
" AND a.attrelid = c.oid "
|
|
" AND a.atttypid = t.oid "
|
|
" AND t.typname = 'oid' "
|
|
" AND c.relkind = 'r' "
|
|
" AND c.relname NOT LIKE 'pg_%'");
|
|
|
|
if (PQresultStatus(pgLO->res) != PGRES_TUPLES_OK)
|
|
{
|
|
fprintf(stderr, "%s: Failed to get LO OIDs:\n%s", progname,
|
|
PQerrorMessage(pgLO->conn));
|
|
exit(RE_ERROR);
|
|
}
|
|
|
|
if ((n = PQntuples(pgLO->res)) == 0)
|
|
{
|
|
fprintf(stderr, "%s: No OID columns in the database.\n", progname);
|
|
exit(RE_ERROR);
|
|
}
|
|
|
|
pgLO->lolist = (LOlist *) malloc((n + 1) * sizeof(LOlist));
|
|
|
|
if (!pgLO->lolist)
|
|
{
|
|
fprintf(stderr, "%s: can't allocate memory\n", progname);
|
|
exit(RE_ERROR);
|
|
}
|
|
|
|
for (i = 0, ll = pgLO->lolist; i < n; i++, ll++)
|
|
{
|
|
ll->lo_table = strdup(PQgetvalue(pgLO->res, i, 0));
|
|
ll->lo_attr = strdup(PQgetvalue(pgLO->res, i, 1));
|
|
}
|
|
ll->lo_table = ll->lo_attr = (char *) NULL;
|
|
|
|
PQclear(pgLO->res);
|
|
}
|
|
|
|
void
|
|
pglo_export(LODumpMaster * pgLO)
|
|
{
|
|
LOlist *ll;
|
|
int tuples;
|
|
char path[BUFSIZ],
|
|
Qbuff[QUERY_BUFSIZ];
|
|
|
|
if (pgLO->action != ACTION_SHOW)
|
|
{
|
|
time_t t;
|
|
|
|
time(&t);
|
|
fprintf(pgLO->index, "#\n# This is the PostgreSQL large object dump index\n#\n");
|
|
fprintf(pgLO->index, "#\tDate: %s", ctime(&t));
|
|
fprintf(pgLO->index, "#\tHost: %s\n", pgLO->host);
|
|
fprintf(pgLO->index, "#\tDatabase: %s\n", pgLO->db);
|
|
fprintf(pgLO->index, "#\tUser: %s\n", pgLO->user);
|
|
fprintf(pgLO->index, "#\n# oid\ttable\tattribut\tinfile\n#\n");
|
|
}
|
|
|
|
pgLO->counter = 0;
|
|
|
|
for (ll = pgLO->lolist; ll->lo_table != NULL; ll++)
|
|
{
|
|
/*
|
|
* Query: find the LOs referenced by this column
|
|
*/
|
|
snprintf(Qbuff, QUERY_BUFSIZ,
|
|
"SELECT DISTINCT l.loid FROM \"%s\" x, pg_largeobject l WHERE x.\"%s\" = l.loid",
|
|
ll->lo_table, ll->lo_attr);
|
|
|
|
/* puts(Qbuff); */
|
|
|
|
pgLO->res = PQexec(pgLO->conn, Qbuff);
|
|
|
|
if (PQresultStatus(pgLO->res) != PGRES_TUPLES_OK)
|
|
{
|
|
fprintf(stderr, "%s: Failed to get LO OIDs:\n%s", progname,
|
|
PQerrorMessage(pgLO->conn));
|
|
}
|
|
else if ((tuples = PQntuples(pgLO->res)) == 0)
|
|
{
|
|
if (!pgLO->quiet && pgLO->action == ACTION_EXPORT_ATTR)
|
|
printf("%s: no large objects in \"%s\".\"%s\"\n",
|
|
progname, ll->lo_table, ll->lo_attr);
|
|
}
|
|
else
|
|
{
|
|
|
|
int t;
|
|
char *val;
|
|
|
|
/*
|
|
* Create DIR/FILE
|
|
*/
|
|
if (pgLO->action != ACTION_SHOW)
|
|
{
|
|
|
|
snprintf(path, BUFSIZ, "%s/%s/%s", pgLO->space, pgLO->db,
|
|
ll->lo_table);
|
|
|
|
if (mkdir(path, DIR_UMASK) == -1)
|
|
{
|
|
if (errno != EEXIST)
|
|
{
|
|
perror(path);
|
|
exit(RE_ERROR);
|
|
}
|
|
}
|
|
|
|
snprintf(path, BUFSIZ, "%s/%s/%s/%s", pgLO->space, pgLO->db,
|
|
ll->lo_table, ll->lo_attr);
|
|
|
|
if (mkdir(path, DIR_UMASK) == -1)
|
|
{
|
|
if (errno != EEXIST)
|
|
{
|
|
perror(path);
|
|
exit(RE_ERROR);
|
|
}
|
|
}
|
|
|
|
if (!pgLO->quiet)
|
|
printf("dump %s.%s (%d large obj)\n",
|
|
ll->lo_table, ll->lo_attr, tuples);
|
|
}
|
|
|
|
pgLO->counter += tuples;
|
|
|
|
for (t = 0; t < tuples; t++)
|
|
{
|
|
Oid lo;
|
|
|
|
val = PQgetvalue(pgLO->res, t, 0);
|
|
|
|
lo = atooid(val);
|
|
|
|
if (pgLO->action == ACTION_SHOW)
|
|
{
|
|
printf("%s.%s: %u\n", ll->lo_table, ll->lo_attr, lo);
|
|
continue;
|
|
}
|
|
|
|
snprintf(path, BUFSIZ, "%s/%s/%s/%s/%s", pgLO->space,
|
|
pgLO->db, ll->lo_table, ll->lo_attr, val);
|
|
|
|
if (lo_export(pgLO->conn, lo, path) < 0)
|
|
fprintf(stderr, "%s: lo_export failed:\n%s", progname,
|
|
PQerrorMessage(pgLO->conn));
|
|
|
|
else
|
|
fprintf(pgLO->index, "%s\t%s\t%s\t%s/%s/%s/%s\n", val,
|
|
ll->lo_table, ll->lo_attr, pgLO->db, ll->lo_table, ll->lo_attr, val);
|
|
}
|
|
}
|
|
|
|
PQclear(pgLO->res);
|
|
}
|
|
}
|