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Code Issues Releases Activity

fix databaseOID usage for pg_ptrack_get_block()

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This commit is contained in:
Anastasia 2017-12-28 15:09:10 +03:00
parent c5f0787453
commit 109b9968cc
3 changed files with 43 additions and 8 deletions
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39
src/backup.c
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@ -2668,20 +2668,49 @@ get_last_ptrack_lsn(void)
}
char *
pg_ptrack_get_block(Oid tblsOid,
pg_ptrack_get_block(Oid dbOid,
Oid tblsOid,
Oid relOid,
BlockNumber blknum,
size_t *result_size)
{
PGresult *res_db;
PGresult *res;
const char *dbname;
char *params[3];
char *result;
char *val;
PGconn *tmp_conn;
params[0] = palloc(64);
params[1] = palloc(64);
params[2] = palloc(64);
sprintf(params[0], "%i", dbOid);
res_db = pgut_execute(backup_conn,
"SELECT datname FROM pg_database WHERE oid=$1",
1, (const char **) params, true);
/*
* If database is not found, it's not an error.
* It could have been deleted.
*/
if (PQntuples(res_db) != 1 || PQnfields(res_db) != 1)
{
//elog(LOG, "Database with oid %d is not found", dbOid);
return NULL;
}
dbname = PQgetvalue(res_db, 0, 0);
if (strcmp(dbname, "template0") == 0)
{
/*
* There is no way to connect to the template0 database.
* But it's totally OK, since files there can never be changed.
*/
return NULL;
}
tmp_conn = pgut_connect(dbname);
/*
* Use backup_conn, cause we can do it from any database.
*/
@ -2689,8 +2718,9 @@ pg_ptrack_get_block(Oid tblsOid,
sprintf(params[1], "%i", relOid);
sprintf(params[2], "%u", blknum);
// elog(WARNING, "pg_ptrack_get_block(%i, %i, %u)", tblsOid, relOid, blknum);
res = pgut_execute(backup_conn, "SELECT pg_ptrack_get_block($1, $2, $3)",
//elog(WARNING, "db %i pg_ptrack_get_block(%i, %i, %u)",dbOid, tblsOid, relOid, blknum);
res = pgut_execute(tmp_conn, "SELECT pg_ptrack_get_block($1, $2, $3)",
3, (const char **)params, true);
if (PQnfields(res) != 1)
@ -2704,7 +2734,10 @@ pg_ptrack_get_block(Oid tblsOid,
result = (char *) PQunescapeBytea((unsigned char *) PQgetvalue(res, 0, 0),
result_size);
pgut_disconnect(tmp_conn);
PQclear(res);
PQclear(res_db);
pfree(params[0]);
pfree(params[1]);
pfree(params[2]);

10
src/data.c
View File

@ -268,13 +268,15 @@ backup_data_page(pgFile *file, XLogRecPtr prev_backup_start_lsn,
free(page);
page = NULL;
page = (Page) pg_ptrack_get_block(file->tblspcOid, file->relOid, absolute_blknum, &page_size);
page = (Page) pg_ptrack_get_block(file->dbOid, file->tblspcOid,
file->relOid, absolute_blknum, &page_size);
if (page == NULL)
{
elog(WARNING, "File %s, block %u, file was truncated",
file->path, absolute_blknum);
/*
* We may skip block for various reasons. It's fine.
* Otherwise pg_ptrack_get_block would have failed with ERROR.
*/
return;
}

2
src/pg_probackup.h
View File

@ -320,7 +320,7 @@ extern const char *deparse_backup_mode(BackupMode mode);
extern void process_block_change(ForkNumber forknum, RelFileNode rnode,
BlockNumber blkno);
extern char *pg_ptrack_get_block(Oid tblsOid, Oid relOid, BlockNumber blknum,
extern char *pg_ptrack_get_block(Oid dbOid, Oid tblsOid, Oid relOid, BlockNumber blknum,
size_t *result_size);
/* in restore.c */
extern int do_restore_or_validate(time_t target_backup_id,