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pg_upgrade: Parallelize WITH OIDS check.

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This commit makes use of the new task framework in pg_upgrade to
parallelize the check for tables declared WITH OIDS.  This step
will now process multiple databases concurrently when pg_upgrade's
--jobs option is provided a value greater than 1.

Reviewed-by: Daniel Gustafsson, Ilya Gladyshev
Discussion: https://postgr.es/m/20240516211638.GA1688936%40nathanxps13
This commit is contained in:
Nathan Bossart 2024-09-16 16:10:33 -05:00
parent cf2f82a37c
commit f93f5f7b98
1 changed files with 53 additions and 49 deletions
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102
src/bin/pg_upgrade/check.c
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@ -1549,73 +1549,77 @@ check_for_incompatible_polymorphics(ClusterInfo *cluster)
pg_free(query);
}
/*
* Callback function for processing results of query for
* check_for_tables_with_oids()'s UpgradeTask. If the query returned any rows
* (i.e., the check failed), write the details to the report file.
*/
static void
process_with_oids_check(DbInfo *dbinfo, PGresult *res, void *arg)
{
UpgradeTaskReport *report = (UpgradeTaskReport *) arg;
bool db_used = false;
int ntups = PQntuples(res);
int i_nspname = PQfnumber(res, "nspname");
int i_relname = PQfnumber(res, "relname");
AssertVariableIsOfType(&process_with_oids_check, UpgradeTaskProcessCB);
if (!ntups)
return;
for (int rowno = 0; rowno < ntups; rowno++)
{
if (report->file == NULL &&
(report->file = fopen_priv(report->path, "w")) == NULL)
pg_fatal("could not open file \"%s\": %m", report->path);
if (!db_used)
{
fprintf(report->file, "In database: %s\n", dbinfo->db_name);
db_used = true;
}
fprintf(report->file, " %s.%s\n",
PQgetvalue(res, rowno, i_nspname),
PQgetvalue(res, rowno, i_relname));
}
}
/*
* Verify that no tables are declared WITH OIDS.
*/
static void
check_for_tables_with_oids(ClusterInfo *cluster)
{
int dbnum;
FILE *script = NULL;
char output_path[MAXPGPATH];
UpgradeTaskReport report;
UpgradeTask *task = upgrade_task_create();
const char *query = "SELECT n.nspname, c.relname "
"FROM pg_catalog.pg_class c, "
" pg_catalog.pg_namespace n "
"WHERE c.relnamespace = n.oid AND "
" c.relhasoids AND"
" n.nspname NOT IN ('pg_catalog')";
prep_status("Checking for tables WITH OIDS");
snprintf(output_path, sizeof(output_path), "%s/%s",
report.file = NULL;
snprintf(report.path, sizeof(report.path), "%s/%s",
log_opts.basedir,
"tables_with_oids.txt");
/* Find any tables declared WITH OIDS */
for (dbnum = 0; dbnum < cluster->dbarr.ndbs; dbnum++)
upgrade_task_add_step(task, query, process_with_oids_check,
true, &report);
upgrade_task_run(task, cluster);
upgrade_task_free(task);
if (report.file)
{
PGresult *res;
bool db_used = false;
int ntups;
int rowno;
int i_nspname,
i_relname;
DbInfo *active_db = &cluster->dbarr.dbs[dbnum];
PGconn *conn = connectToServer(cluster, active_db->db_name);
res = executeQueryOrDie(conn,
"SELECT n.nspname, c.relname "
"FROM pg_catalog.pg_class c, "
" pg_catalog.pg_namespace n "
"WHERE c.relnamespace = n.oid AND "
" c.relhasoids AND"
" n.nspname NOT IN ('pg_catalog')");
ntups = PQntuples(res);
i_nspname = PQfnumber(res, "nspname");
i_relname = PQfnumber(res, "relname");
for (rowno = 0; rowno < ntups; rowno++)
{
if (script == NULL && (script = fopen_priv(output_path, "w")) == NULL)
pg_fatal("could not open file \"%s\": %m", output_path);
if (!db_used)
{
fprintf(script, "In database: %s\n", active_db->db_name);
db_used = true;
}
fprintf(script, " %s.%s\n",
PQgetvalue(res, rowno, i_nspname),
PQgetvalue(res, rowno, i_relname));
}
PQclear(res);
PQfinish(conn);
}
if (script)
{
fclose(script);
fclose(report.file);
pg_log(PG_REPORT, "fatal");
pg_fatal("Your installation contains tables declared WITH OIDS, which is not\n"
"supported anymore. Consider removing the oid column using\n"
" ALTER TABLE ... SET WITHOUT OIDS;\n"
"A list of tables with the problem is in the file:\n"
" %s", output_path);
" %s", report.path);
}
else
check_ok();