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Add a check to pg_dump to see whether backend is same version as pg_dump.

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If not, abort by default.  Abort can be prevented by using -i or
--ignore-version switch.
This commit is contained in:
Tom Lane 2000-04-04 05:22:46 +00:00
parent edd4131e6e
commit c84ba6638e
2 changed files with 69 additions and 7 deletions
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20
doc/src/sgml/ref/pg_dump.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.15 2000/03/27 17:14:43 thomas Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.16 2000/04/04 05:22:45 tgl Exp $
Postgres documentation
-->
@ -26,7 +26,7 @@ Postgres documentation
pg_dump [ <replaceable class="parameter">dbname</replaceable> ]
pg_dump [ -h <replaceable class="parameter">host</replaceable> ] [ -p <replaceable class="parameter">port</replaceable> ]
[ -t <replaceable class="parameter">table</replaceable> ]
[ -a ] [ -c ] [ -d ] [ -D ] [ -n ] [ -N ]
[ -a ] [ -c ] [ -d ] [ -D ] [ -i ] [ -n ] [ -N ]
[ -o ] [ -s ] [ -u ] [ -v ] [ -x ]
[ <replaceable class="parameter">dbname</replaceable> ]
</synopsis>
@ -92,6 +92,22 @@ pg_dump [ -h <replaceable class="parameter">host</replaceable> ] [ -p <replaceab
</listitem>
</varlistentry>
<varlistentry>
<term>-i</term>
<listitem>
<para>
Ignore version mismatch between <application>pg_dump</application>
and the database server. Since <application>pg_dump</application>
knows a great deal about system catalogs, any given version of
<application>pg_dump</application> is only intended to work with
the corresponding release of the database server. Use this option
if you need to override the version check (and if
<application>pg_dump</application> then fails, don't
say you weren't warned).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>-n</term>
<listitem>

52
src/bin/pg_dump/pg_dump.c
View File

@ -22,7 +22,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.144 2000/02/07 16:30:58 wieck Exp $
* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.145 2000/04/04 05:22:46 tgl Exp $
*
* Modifications - 6/10/96 - dave@bensoft.com - version 1.13.dhb
*
@ -139,6 +139,7 @@ help(const char *progname)
" -d, --inserts dump data as INSERT, rather than COPY, commands\n"
" -D, --attribute-inserts dump data as INSERT commands with attribute names\n"
" -h, --host <hostname> server host name\n"
" -i, --ignore-version proceed when database version != pg_dump version\n"
" -n, --no-quotes suppress most quotes around identifiers\n"
" -N, --quotes enable most quotes around identifiers\n"
" -o, --oids dump object ids (oids)\n"
@ -156,6 +157,7 @@ help(const char *progname)
" -d dump data as INSERT, rather than COPY, commands\n"
" -D dump data as INSERT commands with attribute names\n"
" -h <hostname> server host name\n"
" -i proceed when database version != pg_dump version\n"
" -n suppress most quotes around identifiers\n"
" -N enable most quotes around identifiers\n"
" -o dump object ids (oids)\n"
@ -533,6 +535,42 @@ prompt_for_password(char *username, char *password)
}
static void
check_database_version (bool ignoreVersion)
{
PGresult *res;
const char *dbversion;
const char *myversion = "PostgreSQL " PG_RELEASE "." PG_VERSION;
int myversionlen = strlen(myversion);
res = PQexec(g_conn, "SELECT version()");
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK ||
PQntuples(res) != 1)
{
fprintf(stderr, "check_database_version(): command failed. Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
exit_nicely(g_conn);
}
dbversion = PQgetvalue(res, 0, 0);
if (strncmp(dbversion, myversion, myversionlen) != 0)
{
fprintf(stderr, "Database version: %s\npg_dump version: %s\n",
dbversion, PG_RELEASE "." PG_VERSION);
if (ignoreVersion)
{
fprintf(stderr, "Proceeding despite version mismatch.\n");
}
else
{
fprintf(stderr, "Aborting because of version mismatch.\n"
"Use --ignore-version if you think it's safe to proceed anyway.\n");
exit_nicely(g_conn);
}
}
PQclear(res);
}
int
main(int argc, char **argv)
{
@ -551,6 +589,7 @@ main(int argc, char **argv)
char username[100];
char password[100];
bool use_password = false;
bool ignore_version = false;
#ifdef HAVE_GETOPT_LONG
static struct option long_options[] = {
@ -559,6 +598,7 @@ main(int argc, char **argv)
{"inserts",no_argument, NULL, 'd'},
{"attribute-inserts", no_argument, NULL, 'D'},
{"host", required_argument, NULL, 'h'},
{"ignore-version", no_argument, NULL, 'i'},
{"no-quotes", no_argument, NULL, 'n'},
{"quotes", no_argument, NULL, 'N'},
{"oids", no_argument, NULL, 'o'},
@ -591,9 +631,9 @@ main(int argc, char **argv)
#ifdef HAVE_GETOPT_LONG
while ((c = getopt_long(argc, argv, "acdDf:h:nNop:st:uvxzV?", long_options, &optindex)) != -1)
while ((c = getopt_long(argc, argv, "acdDf:h:inNop:st:uvxzV?", long_options, &optindex)) != -1)
#else
while ((c = getopt(argc, argv, "acdDf:h:nNop:st:uvxzV?-")) != -1)
while ((c = getopt(argc, argv, "acdDf:h:inNop:st:uvxzV?-")) != -1)
#endif
{
switch (c)
@ -619,6 +659,9 @@ main(int argc, char **argv)
case 'h': /* server host */
pghost = optarg;
break;
case 'i': /* ignore database version mismatch */
ignore_version = true;
break;
case 'n': /* Do not force double-quotes on
* identifiers */
force_quotes = false;
@ -773,6 +816,9 @@ main(int argc, char **argv)
exit_nicely(g_conn);
}
/* check for version mismatch */
check_database_version(ignore_version);
/*
* Start serializable transaction to dump consistent data
*/