From 7228d02989afd3858ce6eb4de845c56f4c0188a6 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Tue, 19 Apr 2011 21:00:29 -0400
Subject: [PATCH] Throw error for mismatched pg_upgrade clusters
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.
Previously they got an error during the upgrade, and not at the check
stage; PG 9.0.4 does the same.
---
contrib/pg_upgrade/check.c | 46 +++++++++++++++++++++++---------
contrib/pg_upgrade/relfilenode.c | 6 -----
2 files changed, 34 insertions(+), 18 deletions(-)
diff --git a/contrib/pg_upgrade/check.c b/contrib/pg_upgrade/check.c
index 747244072d4..173b29a2c5f 100644
--- a/contrib/pg_upgrade/check.c
+++ b/contrib/pg_upgrade/check.c
@@ -11,7 +11,8 @@
static void set_locale_and_encoding(ClusterInfo *cluster);
-static void check_new_db_is_empty(void);
+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_for_isn_and_int8_passing_mismatch(ClusterInfo *cluster);
@@ -112,7 +113,10 @@ check_new_cluster(void)
{
set_locale_and_encoding(&new_cluster);
- check_new_db_is_empty();
+ get_db_and_rel_infos(&new_cluster);
+
+ check_new_cluster_is_empty();
+ check_old_cluster_has_new_cluster_dbs();
check_loadable_libraries();
@@ -341,12 +345,9 @@ check_locale_and_encoding(ControlData *oldctrl,
static void
-check_new_db_is_empty(void)
+check_new_cluster_is_empty(void)
{
int dbnum;
- bool found = false;
-
- get_db_and_rel_infos(&new_cluster);
for (dbnum = 0; dbnum < new_cluster.dbarr.ndbs; dbnum++)
{
@@ -358,15 +359,36 @@ check_new_db_is_empty(void)
{
/* pg_largeobject and its index should be skipped */
if (strcmp(rel_arr->rels[relnum].nspname, "pg_catalog") != 0)
- {
- found = true;
- break;
- }
+ pg_log(PG_FATAL, "New cluster database \"%s\" is not empty\n",
+ new_cluster.dbarr.dbs[dbnum].db_name);
}
}
- if (found)
- pg_log(PG_FATAL, "New cluster is not empty; exiting\n");
+}
+
+
+/*
+ * 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.
+ */
+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)
+ pg_log(PG_FATAL, "New cluster database \"%s\" does not exist in the old cluster\n",
+ new_cluster.dbarr.dbs[new_dbnum].db_name);
+ }
}
diff --git a/contrib/pg_upgrade/relfilenode.c b/contrib/pg_upgrade/relfilenode.c
index 6fb336cfc53..9a0a3ac18d9 100644
--- a/contrib/pg_upgrade/relfilenode.c
+++ b/contrib/pg_upgrade/relfilenode.c
@@ -37,12 +37,6 @@ transfer_all_new_dbs(DbInfoArr *old_db_arr,
prep_status("Restoring user relation files\n");
- /*
- * If the user removed the 'postgres' database from the old cluster,
- * this will cause the database counts to not match and throw an error.
- * We could allow this to work because the new database is empty (we
- * checked), but we don't.
- */
if (old_db_arr->ndbs != new_db_arr->ndbs)
pg_log(PG_FATAL, "old and new clusters have a different number of databases\n");
--
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