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Create a "relation mapping" infrastructure to support changing the relfilenodes

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of shared or nailed system catalogs.  This has two key benefits:

* The new CLUSTER-based VACUUM FULL can be applied safely to all catalogs.

* We no longer have to use an unsafe reindex-in-place approach for reindexing
  shared catalogs.

CLUSTER on nailed catalogs now works too, although I left it disabled on
shared catalogs because the resulting pg_index.indisclustered update would
only be visible in one database.

Since reindexing shared system catalogs is now fully transactional and
crash-safe, the former special cases in REINDEX behavior have been removed;
shared catalogs are treated the same as non-shared.

This commit does not do anything about the recently-discussed problem of
deadlocks between VACUUM FULL/CLUSTER on a system catalog and other
concurrent queries; will address that in a separate patch.  As a stopgap,
parallel_schedule has been tweaked to run vacuum.sql by itself, to avoid
such failures during the regression tests.
This commit is contained in:
Tom Lane
2010-02-07 20:48:13 +00:00
parent 7fc30c488f
commit b9b8831ad6
54 changed files with 2316 additions and 585 deletions
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22
contrib/oid2name/oid2name.c
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@ -5,7 +5,7 @@
* Originally by
* B. Palmer, bpalmer@crimelabs.net 1-17-2001
*
* $PostgreSQL: pgsql/contrib/oid2name/oid2name.c,v 1.36 2009/06/11 14:48:51 momjian Exp $
* $PostgreSQL: pgsql/contrib/oid2name/oid2name.c,v 1.37 2010/02/07 20:48:08 tgl Exp $
*/
#include "postgres_fe.h"
@ -440,7 +440,7 @@ sql_exec_dumpalldbs(PGconn *conn, struct options * opts)
/* get the oid and database name from the system pg_database table */
snprintf(todo, sizeof(todo),
"SELECT d.oid AS \"Oid\", datname AS \"Database Name\", "
"spcname AS \"Tablespace\" FROM pg_database d JOIN pg_tablespace t ON "
"spcname AS \"Tablespace\" FROM pg_catalog.pg_database d JOIN pg_catalog.pg_tablespace t ON "
"(dattablespace = t.oid) ORDER BY 2");
sql_exec(conn, todo, opts->quiet);
@ -456,10 +456,10 @@ sql_exec_dumpalltables(PGconn *conn, struct options * opts)
char *addfields = ",c.oid AS \"Oid\", nspname AS \"Schema\", spcname as \"Tablespace\" ";
snprintf(todo, sizeof(todo),
"SELECT relfilenode as \"Filenode\", relname as \"Table Name\" %s "
"SELECT pg_catalog.pg_relation_filenode(c.oid) as \"Filenode\", relname as \"Table Name\" %s "
"FROM pg_class c "
" LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace "
" LEFT JOIN pg_catalog.pg_database d ON d.datname = current_database(),"
" LEFT JOIN pg_catalog.pg_database d ON d.datname = pg_catalog.current_database(),"
" pg_catalog.pg_tablespace t "
"WHERE relkind IN ('r'%s%s) AND "
" %s"
@ -477,7 +477,7 @@ sql_exec_dumpalltables(PGconn *conn, struct options * opts)
}
/*
* Show oid, relfilenode, name, schema and tablespace for each of the
* Show oid, filenode, name, schema and tablespace for each of the
* given objects in the current database.
*/
void
@ -492,7 +492,7 @@ sql_exec_searchtables(PGconn *conn, struct options * opts)
bool written = false;
char *addfields = ",c.oid AS \"Oid\", nspname AS \"Schema\", spcname as \"Tablespace\" ";
/* get tables qualifiers, whether names, relfilenodes, or OIDs */
/* get tables qualifiers, whether names, filenodes, or OIDs */
comma_oids = get_comma_elts(opts->oids);
comma_tables = get_comma_elts(opts->tables);
comma_filenodes = get_comma_elts(opts->filenodes);
@ -511,7 +511,7 @@ sql_exec_searchtables(PGconn *conn, struct options * opts)
{
if (written)
ptr += sprintf(ptr, " OR ");
ptr += sprintf(ptr, "c.relfilenode IN (%s)", comma_filenodes);
ptr += sprintf(ptr, "pg_catalog.pg_relation_filenode(c.oid) IN (%s)", comma_filenodes);
written = true;
}
if (opts->tables->num > 0)
@ -527,10 +527,10 @@ sql_exec_searchtables(PGconn *conn, struct options * opts)
/* now build the query */
todo = (char *) myalloc(650 + strlen(qualifiers));
snprintf(todo, 650 + strlen(qualifiers),
"SELECT relfilenode as \"Filenode\", relname as \"Table Name\" %s\n"
"FROM pg_class c \n"
"SELECT pg_catalog.pg_relation_filenode(c.oid) as \"Filenode\", relname as \"Table Name\" %s\n"
"FROM pg_catalog.pg_class c \n"
" LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace \n"
" LEFT JOIN pg_catalog.pg_database d ON d.datname = current_database(),\n"
" LEFT JOIN pg_catalog.pg_database d ON d.datname = pg_catalog.current_database(),\n"
" pg_catalog.pg_tablespace t \n"
"WHERE relkind IN ('r', 'i', 'S', 't') AND \n"
" t.oid = CASE\n"
@ -554,7 +554,7 @@ sql_exec_dumpalltbspc(PGconn *conn, struct options * opts)
snprintf(todo, sizeof(todo),
"SELECT oid AS \"Oid\", spcname as \"Tablespace Name\"\n"
"FROM pg_tablespace");
"FROM pg_catalog.pg_tablespace");
sql_exec(conn, todo, opts->quiet);
}