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Allow pg_upgrade to upgrade an old cluster that doesn't have a

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'postgres' database.
This commit is contained in:
Bruce Momjian 2011-11-01 13:49:03 -04:00
parent 806a2aee37
commit a50d860ae1
3 changed files with 17 additions and 45 deletions
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37
contrib/pg_upgrade/check.c
View File

@ -14,7 +14,6 @@
static void set_locale_and_encoding(ClusterInfo *cluster);
static void check_new_cluster_is_empty(void);
static void check_old_cluster_has_new_cluster_dbs(void);
static void check_locale_and_encoding(ControlData *oldctrl,
ControlData *newctrl);
static void check_is_super_user(ClusterInfo *cluster);
@ -127,7 +126,6 @@ check_new_cluster(void)
check_new_cluster_is_empty();
check_for_prepared_transactions(&new_cluster);
check_old_cluster_has_new_cluster_dbs();
check_loadable_libraries();
@ -381,39 +379,6 @@ check_new_cluster_is_empty(void)
}
/*
* If someone removes the 'postgres' database from the old cluster and
* the new cluster has a 'postgres' database, the number of databases
* will not match. We actually could upgrade such a setup, but it would
* violate the 1-to-1 mapping of database counts, so we throw an error
* instead. We would detect this as a database count mismatch during
* upgrade, but we want to detect it during the check phase and report
* the database name.
*/
static void
check_old_cluster_has_new_cluster_dbs(void)
{
int old_dbnum,
new_dbnum;
for (new_dbnum = 0; new_dbnum < new_cluster.dbarr.ndbs; new_dbnum++)
{
for (old_dbnum = 0; old_dbnum < old_cluster.dbarr.ndbs; old_dbnum++)
if (strcmp(old_cluster.dbarr.dbs[old_dbnum].db_name,
new_cluster.dbarr.dbs[new_dbnum].db_name) == 0)
break;
if (old_dbnum == old_cluster.dbarr.ndbs)
{
if (strcmp(new_cluster.dbarr.dbs[new_dbnum].db_name, "postgres") == 0)
pg_log(PG_FATAL, "The \"postgres\" database must exist in the old cluster\n");
else
pg_log(PG_FATAL, "New cluster database \"%s\" does not exist in the old cluster\n",
new_cluster.dbarr.dbs[new_dbnum].db_name);
}
}
}
/*
* create_script_for_old_cluster_deletion()
*
@ -462,7 +427,7 @@ create_script_for_old_cluster_deletion(char **deletion_script_file_name)
fprintf(script, RM_CMD " %s%s/PG_VERSION\n",
os_info.tablespaces[tblnum], old_cluster.tablespace_suffix);
for (dbnum = 0; dbnum < new_cluster.dbarr.ndbs; dbnum++)
for (dbnum = 0; dbnum < old_cluster.dbarr.ndbs; dbnum++)
{
fprintf(script, RMDIR_CMD " %s%s/%d\n",
os_info.tablespaces[tblnum], old_cluster.tablespace_suffix,

3
contrib/pg_upgrade/function.c
View File

@ -132,8 +132,7 @@ get_loadable_libraries(void)
int totaltups;
int dbnum;
ress = (PGresult **)
pg_malloc(old_cluster.dbarr.ndbs * sizeof(PGresult *));
ress = (PGresult **) pg_malloc(old_cluster.dbarr.ndbs * sizeof(PGresult *));
totaltups = 0;
/* Fetch all library names, removing duplicates within each DB */

22
contrib/pg_upgrade/relfilenode.c
View File

@ -34,22 +34,30 @@ const char *
transfer_all_new_dbs(DbInfoArr *old_db_arr,
DbInfoArr *new_db_arr, char *old_pgdata, char *new_pgdata)
{
int dbnum;
int old_dbnum, new_dbnum;
const char *msg = NULL;
prep_status("Restoring user relation files\n");
if (old_db_arr->ndbs != new_db_arr->ndbs)
pg_log(PG_FATAL, "old and new clusters have a different number of databases\n");
for (dbnum = 0; dbnum < old_db_arr->ndbs; dbnum++)
/* Scan the old cluster databases and transfer their files */
for (old_dbnum = new_dbnum = 0;
old_dbnum < old_db_arr->ndbs && new_dbnum < new_db_arr->ndbs;
old_dbnum++, new_dbnum++)
{
DbInfo *old_db = &old_db_arr->dbs[dbnum];
DbInfo *new_db = &new_db_arr->dbs[dbnum];
DbInfo *old_db = &old_db_arr->dbs[old_dbnum];
DbInfo *new_db = &new_db_arr->dbs[new_dbnum];
FileNameMap *mappings;
int n_maps;
pageCnvCtx *pageConverter = NULL;
/*
* Advance past any databases that exist in the new cluster
* but not in the old, e.g. "postgres".
*/
while (strcmp(old_db->db_name, new_db->db_name) != 0 &&
new_dbnum < new_db_arr->ndbs)
new_db = &new_db_arr->dbs[++new_dbnum];
if (strcmp(old_db->db_name, new_db->db_name) != 0)
pg_log(PG_FATAL, "old and new databases have different names: old \"%s\", new \"%s\"\n",
old_db->db_name, new_db->db_name);