#include "access/transam.h"
#include "catalog/pg_class_d.h"
+#include "pqexpbuffer.h"
#include "pg_upgrade.h"
static void create_rel_filename_map(const char *old_data, const char *new_data,
static void free_db_and_rel_infos(DbInfoArr *db_arr);
static void get_template0_info(ClusterInfo *cluster);
static void get_db_infos(ClusterInfo *cluster);
-static void get_rel_infos(ClusterInfo *cluster, DbInfo *dbinfo);
+static char *get_rel_infos_query(void);
+static void process_rel_infos(DbInfo *dbinfo, PGresult *res, void *arg);
static void free_rel_infos(RelInfoArr *rel_arr);
static void print_db_infos(DbInfoArr *db_arr);
static void print_rel_infos(RelInfoArr *rel_arr);
static void print_slot_infos(LogicalSlotInfoArr *slot_arr);
-static void get_old_cluster_logical_slot_infos(DbInfo *dbinfo);
+static char *get_old_cluster_logical_slot_infos_query(void);
+static void process_old_cluster_logical_slot_infos(DbInfo *dbinfo, PGresult *res, void *arg);
/*
void
get_db_rel_and_slot_infos(ClusterInfo *cluster)
{
- int dbnum;
+ UpgradeTask *task = upgrade_task_create();
+ char *rel_infos_query = NULL;
+ char *logical_slot_infos_query = NULL;
if (cluster->dbarr.dbs != NULL)
free_db_and_rel_infos(&cluster->dbarr);
get_template0_info(cluster);
get_db_infos(cluster);
- for (dbnum = 0; dbnum < cluster->dbarr.ndbs; dbnum++)
+ rel_infos_query = get_rel_infos_query();
+ upgrade_task_add_step(task,
+ rel_infos_query,
+ process_rel_infos,
+ true, NULL);
+
+ /*
+ * Logical slots are only carried over to the new cluster when the old
+ * cluster is on PG17 or newer. This is because before that the logical
+ * slots are not saved at shutdown, so there is no guarantee that the
+ * latest confirmed_flush_lsn is saved to disk which can lead to data
+ * loss. It is still not guaranteed for manually created slots in PG17, so
+ * subsequent checks done in check_old_cluster_for_valid_slots() would
+ * raise a FATAL error if such slots are included.
+ */
+ if (cluster == &old_cluster &&
+ GET_MAJOR_VERSION(cluster->major_version) > 1600)
{
- DbInfo *pDbInfo = &cluster->dbarr.dbs[dbnum];
+ logical_slot_infos_query = get_old_cluster_logical_slot_infos_query();
+ upgrade_task_add_step(task,
+ logical_slot_infos_query,
+ process_old_cluster_logical_slot_infos,
+ true, NULL);
+ }
- get_rel_infos(cluster, pDbInfo);
+ upgrade_task_run(task, cluster);
+ upgrade_task_free(task);
- if (cluster == &old_cluster)
- get_old_cluster_logical_slot_infos(pDbInfo);
- }
+ pg_free(rel_infos_query);
+ if (logical_slot_infos_query)
+ pg_free(logical_slot_infos_query);
if (cluster == &old_cluster)
pg_log(PG_VERBOSE, "\nsource databases:");
/*
- * get_rel_infos()
+ * get_rel_infos_query()
*
- * gets the relinfos for all the user tables and indexes of the database
- * referred to by "dbinfo".
+ * Returns the query for retrieving the relation information for all the user
+ * tables and indexes in the database, for use by get_db_rel_and_slot_infos()'s
+ * UpgradeTask.
*
- * Note: the resulting RelInfo array is assumed to be sorted by OID.
- * This allows later processing to match up old and new databases efficiently.
+ * Note: the result is assumed to be sorted by OID. This allows later
+ * processing to match up old and new databases efficiently.
*/
-static void
-get_rel_infos(ClusterInfo *cluster, DbInfo *dbinfo)
+static char *
+get_rel_infos_query(void)
{
- PGconn *conn = connectToServer(cluster,
- dbinfo->db_name);
- PGresult *res;
- RelInfo *relinfos;
- int ntups;
- int relnum;
- int num_rels = 0;
- char *nspname = NULL;
- char *relname = NULL;
- char *tablespace = NULL;
- int i_spclocation,
- i_nspname,
- i_relname,
- i_reloid,
- i_indtable,
- i_toastheap,
- i_relfilenumber,
- i_reltablespace;
- char query[QUERY_ALLOC];
- char *last_namespace = NULL,
- *last_tablespace = NULL;
+ PQExpBufferData query;
- query[0] = '\0'; /* initialize query string to empty */
+ initPQExpBuffer(&query);
/*
* Create a CTE that collects OIDs of regular user tables and matviews,
* output, so we have to copy that system table. It's easiest to do that
* by treating it as a user table.
*/
- snprintf(query + strlen(query), sizeof(query) - strlen(query),
- "WITH regular_heap (reloid, indtable, toastheap) AS ( "
- " SELECT c.oid, 0::oid, 0::oid "
- " FROM pg_catalog.pg_class c JOIN pg_catalog.pg_namespace n "
- " ON c.relnamespace = n.oid "
- " WHERE relkind IN (" CppAsString2(RELKIND_RELATION) ", "
- CppAsString2(RELKIND_MATVIEW) ") AND "
+ appendPQExpBuffer(&query,
+ "WITH regular_heap (reloid, indtable, toastheap) AS ( "
+ " SELECT c.oid, 0::oid, 0::oid "
+ " FROM pg_catalog.pg_class c JOIN pg_catalog.pg_namespace n "
+ " ON c.relnamespace = n.oid "
+ " WHERE relkind IN (" CppAsString2(RELKIND_RELATION) ", "
+ CppAsString2(RELKIND_MATVIEW) ") AND "
/* exclude possible orphaned temp tables */
- " ((n.nspname !~ '^pg_temp_' AND "
- " n.nspname !~ '^pg_toast_temp_' AND "
- " n.nspname NOT IN ('pg_catalog', 'information_schema', "
- " 'binary_upgrade', 'pg_toast') AND "
- " c.oid >= %u::pg_catalog.oid) OR "
- " (n.nspname = 'pg_catalog' AND "
- " relname IN ('pg_largeobject') ))), ",
- FirstNormalObjectId);
+ " ((n.nspname !~ '^pg_temp_' AND "
+ " n.nspname !~ '^pg_toast_temp_' AND "
+ " n.nspname NOT IN ('pg_catalog', 'information_schema', "
+ " 'binary_upgrade', 'pg_toast') AND "
+ " c.oid >= %u::pg_catalog.oid) OR "
+ " (n.nspname = 'pg_catalog' AND "
+ " relname IN ('pg_largeobject') ))), ",
+ FirstNormalObjectId);
/*
* Add a CTE that collects OIDs of toast tables belonging to the tables
* selected by the regular_heap CTE. (We have to do this separately
* because the namespace-name rules above don't work for toast tables.)
*/
- snprintf(query + strlen(query), sizeof(query) - strlen(query),
- " toast_heap (reloid, indtable, toastheap) AS ( "
- " SELECT c.reltoastrelid, 0::oid, c.oid "
- " FROM regular_heap JOIN pg_catalog.pg_class c "
- " ON regular_heap.reloid = c.oid "
- " WHERE c.reltoastrelid != 0), ");
+ appendPQExpBufferStr(&query,
+ " toast_heap (reloid, indtable, toastheap) AS ( "
+ " SELECT c.reltoastrelid, 0::oid, c.oid "
+ " FROM regular_heap JOIN pg_catalog.pg_class c "
+ " ON regular_heap.reloid = c.oid "
+ " WHERE c.reltoastrelid != 0), ");
/*
* Add a CTE that collects OIDs of all valid indexes on the previously
* Testing indisready is necessary in 9.2, and harmless in earlier/later
* versions.
*/
- snprintf(query + strlen(query), sizeof(query) - strlen(query),
- " all_index (reloid, indtable, toastheap) AS ( "
- " SELECT indexrelid, indrelid, 0::oid "
- " FROM pg_catalog.pg_index "
- " WHERE indisvalid AND indisready "
- " AND indrelid IN "
- " (SELECT reloid FROM regular_heap "
- " UNION ALL "
- " SELECT reloid FROM toast_heap)) ");
+ appendPQExpBufferStr(&query,
+ " all_index (reloid, indtable, toastheap) AS ( "
+ " SELECT indexrelid, indrelid, 0::oid "
+ " FROM pg_catalog.pg_index "
+ " WHERE indisvalid AND indisready "
+ " AND indrelid IN "
+ " (SELECT reloid FROM regular_heap "
+ " UNION ALL "
+ " SELECT reloid FROM toast_heap)) ");
/*
* And now we can write the query that retrieves the data we want for each
* heap and index relation. Make sure result is sorted by OID.
*/
- snprintf(query + strlen(query), sizeof(query) - strlen(query),
- "SELECT all_rels.*, n.nspname, c.relname, "
- " c.relfilenode, c.reltablespace, "
- " pg_catalog.pg_tablespace_location(t.oid) AS spclocation "
- "FROM (SELECT * FROM regular_heap "
- " UNION ALL "
- " SELECT * FROM toast_heap "
- " UNION ALL "
- " SELECT * FROM all_index) all_rels "
- " JOIN pg_catalog.pg_class c "
- " ON all_rels.reloid = c.oid "
- " JOIN pg_catalog.pg_namespace n "
- " ON c.relnamespace = n.oid "
- " LEFT OUTER JOIN pg_catalog.pg_tablespace t "
- " ON c.reltablespace = t.oid "
- "ORDER BY 1;");
-
- res = executeQueryOrDie(conn, "%s", query);
-
- ntups = PQntuples(res);
+ appendPQExpBufferStr(&query,
+ "SELECT all_rels.*, n.nspname, c.relname, "
+ " c.relfilenode, c.reltablespace, "
+ " pg_catalog.pg_tablespace_location(t.oid) AS spclocation "
+ "FROM (SELECT * FROM regular_heap "
+ " UNION ALL "
+ " SELECT * FROM toast_heap "
+ " UNION ALL "
+ " SELECT * FROM all_index) all_rels "
+ " JOIN pg_catalog.pg_class c "
+ " ON all_rels.reloid = c.oid "
+ " JOIN pg_catalog.pg_namespace n "
+ " ON c.relnamespace = n.oid "
+ " LEFT OUTER JOIN pg_catalog.pg_tablespace t "
+ " ON c.reltablespace = t.oid "
+ "ORDER BY 1");
+
+ return query.data;
+}
- relinfos = (RelInfo *) pg_malloc(sizeof(RelInfo) * ntups);
+/*
+ * Callback function for processing results of the query returned by
+ * get_rel_infos_query(), which is used for get_db_rel_and_slot_infos()'s
+ * UpgradeTask. This function stores the relation information for later use.
+ */
+static void
+process_rel_infos(DbInfo *dbinfo, PGresult *res, void *arg)
+{
+ int ntups = PQntuples(res);
+ RelInfo *relinfos = (RelInfo *) pg_malloc(sizeof(RelInfo) * ntups);
+ int i_reloid = PQfnumber(res, "reloid");
+ int i_indtable = PQfnumber(res, "indtable");
+ int i_toastheap = PQfnumber(res, "toastheap");
+ int i_nspname = PQfnumber(res, "nspname");
+ int i_relname = PQfnumber(res, "relname");
+ int i_relfilenumber = PQfnumber(res, "relfilenode");
+ int i_reltablespace = PQfnumber(res, "reltablespace");
+ int i_spclocation = PQfnumber(res, "spclocation");
+ int num_rels = 0;
+ char *nspname = NULL;
+ char *relname = NULL;
+ char *tablespace = NULL;
+ char *last_namespace = NULL;
+ char *last_tablespace = NULL;
- i_reloid = PQfnumber(res, "reloid");
- i_indtable = PQfnumber(res, "indtable");
- i_toastheap = PQfnumber(res, "toastheap");
- i_nspname = PQfnumber(res, "nspname");
- i_relname = PQfnumber(res, "relname");
- i_relfilenumber = PQfnumber(res, "relfilenode");
- i_reltablespace = PQfnumber(res, "reltablespace");
- i_spclocation = PQfnumber(res, "spclocation");
+ AssertVariableIsOfType(&process_rel_infos, UpgradeTaskProcessCB);
- for (relnum = 0; relnum < ntups; relnum++)
+ for (int relnum = 0; relnum < ntups; relnum++)
{
RelInfo *curr = &relinfos[num_rels++];
/* A zero reltablespace oid indicates the database tablespace. */
curr->tablespace = dbinfo->db_tablespace;
}
- PQclear(res);
-
- PQfinish(conn);
dbinfo->rel_arr.rels = relinfos;
dbinfo->rel_arr.nrels = num_rels;
}
/*
- * get_old_cluster_logical_slot_infos()
- *
- * Gets the LogicalSlotInfos for all the logical replication slots of the
- * database referred to by "dbinfo". The status of each logical slot is gotten
- * here, but they are used at the checking phase. See
- * check_old_cluster_for_valid_slots().
+ * get_old_cluster_logical_slot_infos_query()
*
- * Note: This function will not do anything if the old cluster is pre-PG17.
- * This is because before that the logical slots are not saved at shutdown, so
- * there is no guarantee that the latest confirmed_flush_lsn is saved to disk
- * which can lead to data loss. It is still not guaranteed for manually created
- * slots in PG17, so subsequent checks done in
- * check_old_cluster_for_valid_slots() would raise a FATAL error if such slots
- * are included.
+ * Returns the query for retrieving the logical slot information for all the
+ * logical replication slots in the database, for use by
+ * get_db_rel_and_slot_infos()'s UpgradeTask. The status of each logical slot
+ * is checked in check_old_cluster_for_valid_slots().
*/
-static void
-get_old_cluster_logical_slot_infos(DbInfo *dbinfo)
+static char *
+get_old_cluster_logical_slot_infos_query(void)
{
- PGconn *conn;
- PGresult *res;
- LogicalSlotInfo *slotinfos = NULL;
- int num_slots;
-
- /* Logical slots can be migrated since PG17. */
- if (GET_MAJOR_VERSION(old_cluster.major_version) <= 1600)
- return;
-
- conn = connectToServer(&old_cluster, dbinfo->db_name);
-
/*
* Fetch the logical replication slot information. The check whether the
* slot is considered caught up is done by an upgrade function. This
* started and stopped several times causing any temporary slots to be
* removed.
*/
- res = executeQueryOrDie(conn, "SELECT slot_name, plugin, two_phase, failover, "
- "%s as caught_up, invalidation_reason IS NOT NULL as invalid "
- "FROM pg_catalog.pg_replication_slots "
- "WHERE slot_type = 'logical' AND "
- "database = current_database() AND "
- "temporary IS FALSE;",
- user_opts.live_check ? "FALSE" :
- "(CASE WHEN invalidation_reason IS NOT NULL THEN FALSE "
- "ELSE (SELECT pg_catalog.binary_upgrade_logical_slot_has_caught_up(slot_name)) "
- "END)");
-
- num_slots = PQntuples(res);
+ return psprintf("SELECT slot_name, plugin, two_phase, failover, "
+ "%s as caught_up, invalidation_reason IS NOT NULL as invalid "
+ "FROM pg_catalog.pg_replication_slots "
+ "WHERE slot_type = 'logical' AND "
+ "database = current_database() AND "
+ "temporary IS FALSE;",
+ user_opts.live_check ? "FALSE" :
+ "(CASE WHEN invalidation_reason IS NOT NULL THEN FALSE "
+ "ELSE (SELECT pg_catalog.binary_upgrade_logical_slot_has_caught_up(slot_name)) "
+ "END)");
+}
+
+/*
+ * Callback function for processing results of the query returned by
+ * get_old_cluster_logical_slot_infos_query(), which is used for
+ * get_db_rel_and_slot_infos()'s UpgradeTask. This function stores the logical
+ * slot information for later use.
+ */
+static void
+process_old_cluster_logical_slot_infos(DbInfo *dbinfo, PGresult *res, void *arg)
+{
+ LogicalSlotInfo *slotinfos = NULL;
+ int num_slots = PQntuples(res);
+
+ AssertVariableIsOfType(&process_old_cluster_logical_slot_infos,
+ UpgradeTaskProcessCB);
if (num_slots)
{
}
}
- PQclear(res);
- PQfinish(conn);
-
dbinfo->slot_arr.slots = slotinfos;
dbinfo->slot_arr.nslots = num_slots;
}
projects / users / c2main / postgres.git / commitdiff