1997-04-27 06:03:50 +02:00
|
|
|
--
|
2000-01-06 07:41:55 +01:00
|
|
|
-- BTREE_INDEX
|
|
|
|
-- test retrieval of min/max keys for each index
|
1997-04-27 06:03:50 +02:00
|
|
|
--
|
|
|
|
|
|
|
|
SELECT b.*
|
|
|
|
FROM bt_i4_heap b
|
|
|
|
WHERE b.seqno < 1;
|
|
|
|
|
|
|
|
SELECT b.*
|
|
|
|
FROM bt_i4_heap b
|
|
|
|
WHERE b.seqno >= 9999;
|
|
|
|
|
|
|
|
SELECT b.*
|
|
|
|
FROM bt_i4_heap b
|
|
|
|
WHERE b.seqno = 4500;
|
|
|
|
|
|
|
|
SELECT b.*
|
1998-04-26 06:12:15 +02:00
|
|
|
FROM bt_name_heap b
|
|
|
|
WHERE b.seqno < '1'::name;
|
1997-04-27 06:03:50 +02:00
|
|
|
|
|
|
|
SELECT b.*
|
1998-04-26 06:12:15 +02:00
|
|
|
FROM bt_name_heap b
|
|
|
|
WHERE b.seqno >= '9999'::name;
|
1997-04-27 06:03:50 +02:00
|
|
|
|
|
|
|
SELECT b.*
|
1998-04-26 06:12:15 +02:00
|
|
|
FROM bt_name_heap b
|
|
|
|
WHERE b.seqno = '4500'::name;
|
1997-04-27 06:03:50 +02:00
|
|
|
|
|
|
|
SELECT b.*
|
|
|
|
FROM bt_txt_heap b
|
|
|
|
WHERE b.seqno < '1'::text;
|
|
|
|
|
|
|
|
SELECT b.*
|
|
|
|
FROM bt_txt_heap b
|
|
|
|
WHERE b.seqno >= '9999'::text;
|
|
|
|
|
|
|
|
SELECT b.*
|
|
|
|
FROM bt_txt_heap b
|
|
|
|
WHERE b.seqno = '4500'::text;
|
|
|
|
|
|
|
|
SELECT b.*
|
|
|
|
FROM bt_f8_heap b
|
|
|
|
WHERE b.seqno < '1'::float8;
|
|
|
|
|
|
|
|
SELECT b.*
|
|
|
|
FROM bt_f8_heap b
|
|
|
|
WHERE b.seqno >= '9999'::float8;
|
|
|
|
|
|
|
|
SELECT b.*
|
|
|
|
FROM bt_f8_heap b
|
|
|
|
WHERE b.seqno = '4500'::float8;
|
|
|
|
|
2008-11-20 20:52:54 +01:00
|
|
|
--
|
|
|
|
-- Check correct optimization of LIKE (special index operator support)
|
|
|
|
-- for both indexscan and bitmapscan cases
|
|
|
|
--
|
|
|
|
|
|
|
|
set enable_seqscan to false;
|
|
|
|
set enable_indexscan to true;
|
|
|
|
set enable_bitmapscan to false;
|
2019-02-12 03:26:08 +01:00
|
|
|
explain (costs off)
|
2008-11-20 20:52:54 +01:00
|
|
|
select proname from pg_proc where proname like E'RI\\_FKey%del' order by 1;
|
2019-02-12 03:26:08 +01:00
|
|
|
select proname from pg_proc where proname like E'RI\\_FKey%del' order by 1;
|
|
|
|
explain (costs off)
|
|
|
|
select proname from pg_proc where proname ilike '00%foo' order by 1;
|
|
|
|
select proname from pg_proc where proname ilike '00%foo' order by 1;
|
|
|
|
explain (costs off)
|
|
|
|
select proname from pg_proc where proname ilike 'ri%foo' order by 1;
|
2008-11-20 20:52:54 +01:00
|
|
|
|
|
|
|
set enable_indexscan to false;
|
|
|
|
set enable_bitmapscan to true;
|
2019-02-12 03:26:08 +01:00
|
|
|
explain (costs off)
|
|
|
|
select proname from pg_proc where proname like E'RI\\_FKey%del' order by 1;
|
2008-11-20 20:52:54 +01:00
|
|
|
select proname from pg_proc where proname like E'RI\\_FKey%del' order by 1;
|
2019-02-12 03:26:08 +01:00
|
|
|
explain (costs off)
|
|
|
|
select proname from pg_proc where proname ilike '00%foo' order by 1;
|
|
|
|
select proname from pg_proc where proname ilike '00%foo' order by 1;
|
|
|
|
explain (costs off)
|
|
|
|
select proname from pg_proc where proname ilike 'ri%foo' order by 1;
|
|
|
|
|
|
|
|
reset enable_seqscan;
|
|
|
|
reset enable_indexscan;
|
|
|
|
reset enable_bitmapscan;
|
2014-11-19 18:24:58 +01:00
|
|
|
|
|
|
|
--
|
|
|
|
-- Test B-tree page deletion. In particular, deleting a non-leaf page.
|
|
|
|
--
|
|
|
|
|
|
|
|
-- First create a tree that's at least four levels deep. The text inserted
|
|
|
|
-- is long and poorly compressible. That way only a few index tuples fit on
|
|
|
|
-- each page, allowing us to get a tall tree with fewer pages.
|
|
|
|
create table btree_tall_tbl(id int4, t text);
|
|
|
|
create index btree_tall_idx on btree_tall_tbl (id, t) with (fillfactor = 10);
|
|
|
|
insert into btree_tall_tbl
|
|
|
|
select g, g::text || '_' ||
|
|
|
|
(select string_agg(md5(i::text), '_') from generate_series(1, 50) i)
|
|
|
|
from generate_series(1, 100) g;
|
|
|
|
|
|
|
|
-- Delete most entries, and vacuum. This causes page deletions.
|
|
|
|
delete from btree_tall_tbl where id < 950;
|
|
|
|
vacuum btree_tall_tbl;
|
|
|
|
|
|
|
|
--
|
|
|
|
-- Test B-tree insertion with a metapage update (XLOG_BTREE_INSERT_META
|
|
|
|
-- WAL record type). This happens when a "fast root" page is split.
|
|
|
|
--
|
|
|
|
|
|
|
|
-- The vacuum above should've turned the leaf page into a fast root. We just
|
|
|
|
-- need to insert some rows to cause the fast root page to split.
|
|
|
|
insert into btree_tall_tbl (id, t)
|
|
|
|
select g, repeat('x', 100) from generate_series(1, 500) g;
|
Skip full index scan during cleanup of B-tree indexes when possible
Vacuum of index consists from two stages: multiple (zero of more) ambulkdelete
calls and one amvacuumcleanup call. When workload on particular table
is append-only, then autovacuum isn't intended to touch this table. However,
user may run vacuum manually in order to fill visibility map and get benefits
of index-only scans. Then ambulkdelete wouldn't be called for indexes
of such table (because no heap tuples were deleted), only amvacuumcleanup would
be called In this case, amvacuumcleanup would perform full index scan for
two objectives: put recyclable pages into free space map and update index
statistics.
This patch allows btvacuumclanup to skip full index scan when two conditions
are satisfied: no pages are going to be put into free space map and index
statistics isn't stalled. In order to check first condition, we store
oldest btpo_xact in the meta-page. When it's precedes RecentGlobalXmin, then
there are some recyclable pages. In order to check second condition we store
number of heap tuples observed during previous full index scan by cleanup.
If fraction of newly inserted tuples is less than
vacuum_cleanup_index_scale_factor, then statistics isn't considered to be
stalled. vacuum_cleanup_index_scale_factor can be defined as both reloption and GUC (default).
This patch bumps B-tree meta-page version. Upgrade of meta-page is performed
"on the fly": during VACUUM meta-page is rewritten with new version. No special
handling in pg_upgrade is required.
Author: Masahiko Sawada, Alexander Korotkov
Review by: Peter Geoghegan, Kyotaro Horiguchi, Alexander Korotkov, Yura Sokolov
Discussion: https://www.postgresql.org/message-id/flat/CAD21AoAX+d2oD_nrd9O2YkpzHaFr=uQeGr9s1rKC3O4ENc568g@mail.gmail.com
2018-04-04 18:29:00 +02:00
|
|
|
|
|
|
|
--
|
|
|
|
-- Test vacuum_cleanup_index_scale_factor
|
|
|
|
--
|
|
|
|
|
|
|
|
-- Simple create
|
|
|
|
create table btree_test(a int);
|
|
|
|
create index btree_idx1 on btree_test(a) with (vacuum_cleanup_index_scale_factor = 40.0);
|
|
|
|
select reloptions from pg_class WHERE oid = 'btree_idx1'::regclass;
|
|
|
|
|
|
|
|
-- Fail while setting improper values
|
|
|
|
create index btree_idx_err on btree_test(a) with (vacuum_cleanup_index_scale_factor = -10.0);
|
|
|
|
create index btree_idx_err on btree_test(a) with (vacuum_cleanup_index_scale_factor = 100.0);
|
|
|
|
create index btree_idx_err on btree_test(a) with (vacuum_cleanup_index_scale_factor = 'string');
|
|
|
|
create index btree_idx_err on btree_test(a) with (vacuum_cleanup_index_scale_factor = true);
|
|
|
|
|
|
|
|
-- Simple ALTER INDEX
|
|
|
|
alter index btree_idx1 set (vacuum_cleanup_index_scale_factor = 70.0);
|
|
|
|
select reloptions from pg_class WHERE oid = 'btree_idx1'::regclass;
|