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99f8f3fbbc8f743290844e8c676d39dad11c5d5d
postgresql/src/test/regress/sql/stats_import.sql
Melanie Plageman 99f8f3fbbc Add relallfrozen to pg_class 
Add relallfrozen, an estimate of the number of pages marked all-frozen
in the visibility map.

pg_class already has relallvisible, an estimate of the number of pages
in the relation marked all-visible in the visibility map. This is used
primarily for planning.

relallfrozen, together with relallvisible, is useful for estimating the
outstanding number of all-visible but not all-frozen pages in the
relation for the purposes of scheduling manual VACUUMs and tuning vacuum
freeze parameters.

A future commit will use relallfrozen to trigger more frequent vacuums
on insert-focused workloads with significant volume of frozen data.

Bump catalog version

Author: Melanie Plageman <melanieplageman@gmail.com>
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Robert Treat <rob@xzilla.net>
Reviewed-by: Corey Huinker <corey.huinker@gmail.com>
Reviewed-by: Greg Sabino Mullane <htamfids@gmail.com>
Discussion: https://postgr.es/m/flat/CAAKRu_aj-P7YyBz_cPNwztz6ohP%2BvWis%3Diz3YcomkB3NpYA--w%40mail.gmail.com
2025-03-03 11:18:05 -05:00

1008 lines
31 KiB
PL/PgSQL
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CREATE SCHEMA stats_import;
CREATE TYPE stats_import.complex_type AS (
a integer,
b real,
c text,
d date,
e jsonb);
CREATE TABLE stats_import.test(
id INTEGER PRIMARY KEY,
name text,
comp stats_import.complex_type,
arange int4range,
tags text[]
) WITH (autovacuum_enabled = false);
CREATE INDEX test_i ON stats_import.test(id);
-- starting stats
SELECT relpages, reltuples, relallvisible, relallfrozen
FROM pg_class
WHERE oid = 'stats_import.test'::regclass;
BEGIN;
-- regular indexes have special case locking rules
SELECT
pg_catalog.pg_restore_relation_stats(
'relation', 'stats_import.test_i'::regclass,
'relpages', 18::integer);
SELECT mode FROM pg_locks
WHERE relation = 'stats_import.test'::regclass AND
pid = pg_backend_pid() AND granted;
SELECT mode FROM pg_locks
WHERE relation = 'stats_import.test_i'::regclass AND
pid = pg_backend_pid() AND granted;
COMMIT;
SELECT
pg_catalog.pg_restore_relation_stats(
'relation', 'stats_import.test_i'::regclass,
'relpages', 19::integer );
-- clear
SELECT
pg_catalog.pg_clear_relation_stats(
'stats_import.test'::regclass);
SELECT relpages, reltuples, relallvisible, relallfrozen
FROM pg_class
WHERE oid = 'stats_import.test'::regclass;
-- relpages may be -1 for partitioned tables
CREATE TABLE stats_import.part_parent ( i integer ) PARTITION BY RANGE(i);
CREATE TABLE stats_import.part_child_1
PARTITION OF stats_import.part_parent
FOR VALUES FROM (0) TO (10)
WITH (autovacuum_enabled = false);
CREATE INDEX part_parent_i ON stats_import.part_parent(i);
ANALYZE stats_import.part_parent;
SELECT relpages
FROM pg_class
WHERE oid = 'stats_import.part_parent'::regclass;
-- although partitioned tables have no storage, setting relpages to a
-- positive value is still allowed
SELECT
pg_catalog.pg_restore_relation_stats(
'relation', 'stats_import.part_parent_i'::regclass,
'relpages', 2::integer);
SELECT
pg_catalog.pg_restore_relation_stats(
'relation', 'stats_import.part_parent'::regclass,
'relpages', 2::integer);
--
-- Partitioned indexes aren't analyzed but it is possible to set
-- stats. The locking rules are different from normal indexes due to
-- the rules for in-place updates: both the partitioned table and the
-- partitioned index are locked in ShareUpdateExclusive mode.
--
BEGIN;
SELECT
pg_catalog.pg_restore_relation_stats(
'relation', 'stats_import.part_parent_i'::regclass,
'relpages', 2::integer);
SELECT mode FROM pg_locks
WHERE relation = 'stats_import.part_parent'::regclass AND
pid = pg_backend_pid() AND granted;
SELECT mode FROM pg_locks
WHERE relation = 'stats_import.part_parent_i'::regclass AND
pid = pg_backend_pid() AND granted;
COMMIT;
SELECT
pg_catalog.pg_restore_relation_stats(
'relation', 'stats_import.part_parent_i'::regclass,
'relpages', 2::integer);
-- nothing stops us from setting it to -1
SELECT
pg_catalog.pg_restore_relation_stats(
'relation', 'stats_import.part_parent'::regclass,
'relpages', -1::integer);
-- ok: set all stats
SELECT pg_restore_relation_stats(
'relation', 'stats_import.test'::regclass,
'version', 150000::integer,
'relpages', '17'::integer,
'reltuples', 400::real,
'relallvisible', 4::integer,
'relallfrozen', 2::integer);
SELECT relpages, reltuples, relallvisible, relallfrozen
FROM pg_class
WHERE oid = 'stats_import.test'::regclass;
-- ok: just relpages
SELECT pg_restore_relation_stats(
'relation', 'stats_import.test'::regclass,
'version', 150000::integer,
'relpages', '16'::integer);
SELECT relpages, reltuples, relallvisible, relallfrozen
FROM pg_class
WHERE oid = 'stats_import.test'::regclass;
-- ok: just reltuples
SELECT pg_restore_relation_stats(
'relation', 'stats_import.test'::regclass,
'version', 150000::integer,
'reltuples', '500'::real);
SELECT relpages, reltuples, relallvisible, relallfrozen
FROM pg_class
WHERE oid = 'stats_import.test'::regclass;
-- ok: just relallvisible
SELECT pg_restore_relation_stats(
'relation', 'stats_import.test'::regclass,
'version', 150000::integer,
'relallvisible', 5::integer);
SELECT relpages, reltuples, relallvisible, relallfrozen
FROM pg_class
WHERE oid = 'stats_import.test'::regclass;
-- ok: just relallfrozen
SELECT pg_restore_relation_stats(
'relation', 'stats_import.test'::regclass,
'version', 150000::integer,
'relallfrozen', 3::integer);
SELECT relpages, reltuples, relallvisible, relallfrozen
FROM pg_class
WHERE oid = 'stats_import.test'::regclass;
-- warn: bad relpages type
SELECT pg_restore_relation_stats(
'relation', 'stats_import.test'::regclass,
'version', 150000::integer,
'relpages', 'nope'::text,
'reltuples', 400.0::real,
'relallvisible', 4::integer,
'relallfrozen', 3::integer);
SELECT relpages, reltuples, relallvisible, relallfrozen
FROM pg_class
WHERE oid = 'stats_import.test'::regclass;
-- invalid relkinds for statistics
CREATE SEQUENCE stats_import.testseq;
CREATE VIEW stats_import.testview AS SELECT * FROM stats_import.test;
SELECT
pg_catalog.pg_clear_relation_stats(
'stats_import.testseq'::regclass);
SELECT
pg_catalog.pg_clear_relation_stats(
'stats_import.testview'::regclass);
-- ok: no stakinds
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.2::real,
'avg_width', 5::integer,
'n_distinct', 0.6::real);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- ok: restore by attnum
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attnum', 1::smallint,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.4::real,
'avg_width', 5::integer,
'n_distinct', 0.6::real);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: unrecognized argument name
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.2::real,
'avg_width', NULL::integer,
'nope', 0.5::real);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: mcv / mcf null mismatch part 1
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.6::real,
'avg_width', 7::integer,
'n_distinct', -0.7::real,
'most_common_freqs', '{0.1,0.2,0.3}'::real[]
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: mcv / mcf null mismatch part 2
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.7::real,
'avg_width', 8::integer,
'n_distinct', -0.8::real,
'most_common_vals', '{1,2,3}'::text
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: mcv / mcf type mismatch
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.8::real,
'avg_width', 9::integer,
'n_distinct', -0.9::real,
'most_common_vals', '{2,1,3}'::text,
'most_common_freqs', '{0.2,0.1}'::double precision[]
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: mcv cast failure
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.9::real,
'avg_width', 10::integer,
'n_distinct', -0.4::real,
'most_common_vals', '{2,four,3}'::text,
'most_common_freqs', '{0.3,0.25,0.05}'::real[]
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- ok: mcv+mcf
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.1::real,
'avg_width', 1::integer,
'n_distinct', -0.1::real,
'most_common_vals', '{2,1,3}'::text,
'most_common_freqs', '{0.3,0.25,0.05}'::real[]
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: NULL in histogram array
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.2::real,
'avg_width', 2::integer,
'n_distinct', -0.2::real,
'histogram_bounds', '{1,NULL,3,4}'::text
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- ok: histogram_bounds
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.3::real,
'avg_width', 3::integer,
'n_distinct', -0.3::real,
'histogram_bounds', '{1,2,3,4}'::text );
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: elem_count_histogram null element
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'tags'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.4::real,
'avg_width', 5::integer,
'n_distinct', -0.4::real,
'elem_count_histogram', '{1,1,NULL,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[]
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'tags';
-- ok: elem_count_histogram
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'tags'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.5::real,
'avg_width', 6::integer,
'n_distinct', -0.55::real,
'elem_count_histogram', '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[]
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'tags';
-- range stats on a scalar type
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.6::real,
'avg_width', 7::integer,
'n_distinct', -0.15::real,
'range_empty_frac', 0.5::real,
'range_length_histogram', '{399,499,Infinity}'::text
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: range_empty_frac range_length_hist null mismatch
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'arange'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.7::real,
'avg_width', 8::integer,
'n_distinct', -0.25::real,
'range_length_histogram', '{399,499,Infinity}'::text
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'arange';
-- warn: range_empty_frac range_length_hist null mismatch part 2
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'arange'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.8::real,
'avg_width', 9::integer,
'n_distinct', -0.35::real,
'range_empty_frac', 0.5::real
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'arange';
-- ok: range_empty_frac + range_length_hist
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'arange'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.9::real,
'avg_width', 1::integer,
'n_distinct', -0.19::real,
'range_empty_frac', 0.5::real,
'range_length_histogram', '{399,499,Infinity}'::text
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'arange';
-- warn: range bounds histogram on scalar
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.1::real,
'avg_width', 2::integer,
'n_distinct', -0.29::real,
'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- ok: range_bounds_histogram
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'arange'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.2::real,
'avg_width', 3::integer,
'n_distinct', -0.39::real,
'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'arange';
-- warn: cannot set most_common_elems for range type
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'arange'::name,
'inherited', false::boolean,
'null_frac', 0.5::real,
'avg_width', 2::integer,
'n_distinct', -0.1::real,
'most_common_vals', '{"[2,3)","[1,2)","[3,4)"}'::text,
'most_common_freqs', '{0.3,0.25,0.05}'::real[],
'histogram_bounds', '{"[1,2)","[2,3)","[3,4)","[4,5)"}'::text,
'correlation', 1.1::real,
'most_common_elems', '{3,1}'::text,
'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[],
'range_empty_frac', -0.5::real,
'range_length_histogram', '{399,499,Infinity}'::text,
'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'arange';
-- warn: scalars can't have mcelem
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'null_frac', 0.5::real,
'avg_width', 2::integer,
'n_distinct', -0.1::real,
'most_common_elems', '{1,3}'::text,
'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[]
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: mcelem / mcelem mismatch
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'tags'::name,
'inherited', false::boolean,
'null_frac', 0.5::real,
'avg_width', 2::integer,
'n_distinct', -0.1::real,
'most_common_elems', '{one,two}'::text
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'tags';
-- warn: mcelem / mcelem null mismatch part 2
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'tags'::name,
'inherited', false::boolean,
'null_frac', 0.5::real,
'avg_width', 2::integer,
'n_distinct', -0.1::real,
'most_common_elem_freqs', '{0.3,0.2,0.2,0.3}'::real[]
);
-- ok: mcelem
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'tags'::name,
'inherited', false::boolean,
'null_frac', 0.5::real,
'avg_width', 2::integer,
'n_distinct', -0.1::real,
'most_common_elems', '{one,three}'::text,
'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[]
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'tags';
-- warn: scalars can't have elem_count_histogram
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'null_frac', 0.5::real,
'avg_width', 2::integer,
'n_distinct', -0.1::real,
'elem_count_histogram', '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[]
);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'id';
-- warn: too many stat kinds
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'arange'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.5::real,
'avg_width', 2::integer,
'n_distinct', -0.1::real,
'most_common_vals', '{"[2,3)","[1,3)","[3,9)"}'::text,
'most_common_freqs', '{0.3,0.25,0.05}'::real[],
'histogram_bounds', '{"[1,2)","[2,3)","[3,4)","[4,)"}'::text,
'correlation', 1.1::real,
'most_common_elems', '{3,1}'::text,
'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[],
'range_empty_frac', -0.5::real,
'range_length_histogram', '{399,499,Infinity}'::text,
'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text);
SELECT *
FROM pg_stats
WHERE schemaname = 'stats_import'
AND tablename = 'test'
AND inherited = false
AND attname = 'arange';
--
-- Test the ability to exactly copy data from one table to an identical table,
-- correctly reconstructing the stakind order as well as the staopN and
-- stacollN values. Because oids are not stable across databases, we can only
-- test this when the source and destination are on the same database
-- instance. For that reason, we borrow and adapt a query found in fe_utils
-- and used by pg_dump/pg_upgrade.
--
INSERT INTO stats_import.test
SELECT 1, 'one', (1, 1.1, 'ONE', '2001-01-01', '{ "xkey": "xval" }')::stats_import.complex_type, int4range(1,4), array['red','green']
UNION ALL
SELECT 2, 'two', (2, 2.2, 'TWO', '2002-02-02', '[true, 4, "six"]')::stats_import.complex_type, int4range(1,4), array['blue','yellow']
UNION ALL
SELECT 3, 'tre', (3, 3.3, 'TRE', '2003-03-03', NULL)::stats_import.complex_type, int4range(-1,1), array['"orange"', 'purple', 'cyan']
UNION ALL
SELECT 4, 'four', NULL, int4range(0,100), NULL;
CREATE INDEX is_odd ON stats_import.test(((comp).a % 2 = 1));
-- restoring stats on index
SELECT * FROM pg_catalog.pg_restore_relation_stats(
'relation', 'stats_import.is_odd'::regclass,
'version', '180000'::integer,
'relpages', '11'::integer,
'reltuples', '10000'::real,
'relallvisible', '0'::integer,
'relallfrozen', '0'::integer
);
-- Generate statistics on table with data
ANALYZE stats_import.test;
CREATE TABLE stats_import.test_clone ( LIKE stats_import.test )
WITH (autovacuum_enabled = false);
CREATE INDEX is_odd_clone ON stats_import.test_clone(((comp).a % 2 = 1));
--
-- Copy stats from test to test_clone, and is_odd to is_odd_clone
--
SELECT s.schemaname, s.tablename, s.attname, s.inherited, r.*
FROM pg_catalog.pg_stats AS s
CROSS JOIN LATERAL
pg_catalog.pg_restore_attribute_stats(
'relation', ('stats_import.' || s.tablename || '_clone')::regclass,
'attname', s.attname,
'inherited', s.inherited,
'version', 150000,
'null_frac', s.null_frac,
'avg_width', s.avg_width,
'n_distinct', s.n_distinct,
'most_common_vals', s.most_common_vals::text,
'most_common_freqs', s.most_common_freqs,
'histogram_bounds', s.histogram_bounds::text,
'correlation', s.correlation,
'most_common_elems', s.most_common_elems::text,
'most_common_elem_freqs', s.most_common_elem_freqs,
'elem_count_histogram', s.elem_count_histogram,
'range_bounds_histogram', s.range_bounds_histogram::text,
'range_empty_frac', s.range_empty_frac,
'range_length_histogram', s.range_length_histogram::text) AS r
WHERE s.schemaname = 'stats_import'
AND s.tablename IN ('test', 'is_odd')
ORDER BY s.tablename, s.attname, s.inherited;
SELECT c.relname, COUNT(*) AS num_stats
FROM pg_class AS c
JOIN pg_statistic s ON s.starelid = c.oid
WHERE c.relnamespace = 'stats_import'::regnamespace
AND c.relname IN ('test', 'test_clone', 'is_odd', 'is_odd_clone')
GROUP BY c.relname
ORDER BY c.relname;
-- check test minus test_clone
SELECT
a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct,
s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5,
s.staop1, s.staop2, s.staop3, s.staop4, s.staop5,
s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5,
s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5,
s.stavalues1::text AS sv1, s.stavalues2::text AS sv2,
s.stavalues3::text AS sv3, s.stavalues4::text AS sv4,
s.stavalues5::text AS sv5, 'test' AS direction
FROM pg_statistic s
JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum
WHERE s.starelid = 'stats_import.test'::regclass
EXCEPT
SELECT
a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct,
s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5,
s.staop1, s.staop2, s.staop3, s.staop4, s.staop5,
s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5,
s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5,
s.stavalues1::text AS sv1, s.stavalues2::text AS sv2,
s.stavalues3::text AS sv3, s.stavalues4::text AS sv4,
s.stavalues5::text AS sv5, 'test' AS direction
FROM pg_statistic s
JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum
WHERE s.starelid = 'stats_import.test_clone'::regclass;
-- check test_clone minus test
SELECT
a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct,
s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5,
s.staop1, s.staop2, s.staop3, s.staop4, s.staop5,
s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5,
s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5,
s.stavalues1::text AS sv1, s.stavalues2::text AS sv2,
s.stavalues3::text AS sv3, s.stavalues4::text AS sv4,
s.stavalues5::text AS sv5, 'test_clone' AS direction
FROM pg_statistic s
JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum
WHERE s.starelid = 'stats_import.test_clone'::regclass
EXCEPT
SELECT
a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct,
s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5,
s.staop1, s.staop2, s.staop3, s.staop4, s.staop5,
s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5,
s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5,
s.stavalues1::text AS sv1, s.stavalues2::text AS sv2,
s.stavalues3::text AS sv3, s.stavalues4::text AS sv4,
s.stavalues5::text AS sv5, 'test_clone' AS direction
FROM pg_statistic s
JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum
WHERE s.starelid = 'stats_import.test'::regclass;
-- check is_odd minus is_odd_clone
SELECT
a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct,
s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5,
s.staop1, s.staop2, s.staop3, s.staop4, s.staop5,
s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5,
s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5,
s.stavalues1::text AS sv1, s.stavalues2::text AS sv2,
s.stavalues3::text AS sv3, s.stavalues4::text AS sv4,
s.stavalues5::text AS sv5, 'is_odd' AS direction
FROM pg_statistic s
JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum
WHERE s.starelid = 'stats_import.is_odd'::regclass
EXCEPT
SELECT
a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct,
s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5,
s.staop1, s.staop2, s.staop3, s.staop4, s.staop5,
s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5,
s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5,
s.stavalues1::text AS sv1, s.stavalues2::text AS sv2,
s.stavalues3::text AS sv3, s.stavalues4::text AS sv4,
s.stavalues5::text AS sv5, 'is_odd' AS direction
FROM pg_statistic s
JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum
WHERE s.starelid = 'stats_import.is_odd_clone'::regclass;
-- check is_odd_clone minus is_odd
SELECT
a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct,
s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5,
s.staop1, s.staop2, s.staop3, s.staop4, s.staop5,
s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5,
s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5,
s.stavalues1::text AS sv1, s.stavalues2::text AS sv2,
s.stavalues3::text AS sv3, s.stavalues4::text AS sv4,
s.stavalues5::text AS sv5, 'is_odd_clone' AS direction
FROM pg_statistic s
JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum
WHERE s.starelid = 'stats_import.is_odd_clone'::regclass
EXCEPT
SELECT
a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct,
s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5,
s.staop1, s.staop2, s.staop3, s.staop4, s.staop5,
s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5,
s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5,
s.stavalues1::text AS sv1, s.stavalues2::text AS sv2,
s.stavalues3::text AS sv3, s.stavalues4::text AS sv4,
s.stavalues5::text AS sv5, 'is_odd_clone' AS direction
FROM pg_statistic s
JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum
WHERE s.starelid = 'stats_import.is_odd'::regclass;
-- ok
SELECT pg_catalog.pg_clear_attribute_stats(
relation => 'stats_import.test'::regclass,
attname => 'arange'::name,
inherited => false::boolean);
--
-- Negative tests
--
--- error: relation is wrong type
SELECT pg_catalog.pg_restore_relation_stats(
'relation', 0::oid,
'relpages', 17::integer,
'reltuples', 400.0::real,
'relallvisible', 4::integer,
'relallfrozen', 3::integer);
--- error: relation not found
SELECT pg_catalog.pg_restore_relation_stats(
'relation', 0::regclass,
'relpages', 17::integer,
'reltuples', 400.0::real,
'relallvisible', 4::integer,
'relallfrozen', 3::integer);
-- warn and error: unrecognized argument name
SELECT pg_restore_relation_stats(
'relation', '0'::oid::regclass,
'version', 150000::integer,
'relpages', '17'::integer,
'reltuples', 400::real,
'nope', 4::integer);
-- error: argument name is NULL
SELECT pg_restore_relation_stats(
'relation', '0'::oid::regclass,
'version', 150000::integer,
NULL, '17'::integer,
'reltuples', 400::real,
'relallvisible', 4::integer,
'relallfrozen', 3::integer);
-- error: argument name is an integer
SELECT pg_restore_relation_stats(
'relation', '0'::oid::regclass,
'version', 150000::integer,
17, '17'::integer,
'reltuples', 400::real,
'relallvisible', 4::integer,
'relallfrozen', 3::integer);
-- error: odd number of variadic arguments cannot be pairs
SELECT pg_restore_relation_stats(
'relation', '0'::oid::regclass,
'version', 150000::integer,
'relpages', '17'::integer,
'reltuples', 400::real,
'relallfrozen', 3::integer,
'relallvisible');
-- error: object doesn't exist
SELECT pg_restore_relation_stats(
'relation', '0'::oid::regclass,
'version', 150000::integer,
'relpages', '17'::integer,
'reltuples', 400::real,
'relallvisible', 4::integer,
'relallfrozen', 3::integer);
-- error: object does not exist
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', '0'::oid::regclass,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.1::real,
'avg_width', 2::integer,
'n_distinct', 0.3::real);
-- error: relation null
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', NULL::oid,
'attname', 'id'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.1::real,
'avg_width', 2::integer,
'n_distinct', 0.3::real);
-- error: missing attname
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', NULL::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.1::real,
'avg_width', 2::integer,
'n_distinct', 0.3::real);
-- error: both attname and attnum
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'attnum', 1::smallint,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.1::real,
'avg_width', 2::integer,
'n_distinct', 0.3::real);
-- error: attname doesn't exist
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'nope'::name,
'inherited', false::boolean,
'version', 150000::integer,
'null_frac', 0.1::real,
'avg_width', 2::integer,
'n_distinct', 0.3::real);
-- error: attribute is system column
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'xmin'::name,
'inherited', false::boolean,
'null_frac', 0.1::real,
'avg_width', 2::integer,
'n_distinct', 0.3::real);
-- error: inherited null
SELECT pg_catalog.pg_restore_attribute_stats(
'relation', 'stats_import.test'::regclass,
'attname', 'id'::name,
'inherited', NULL::boolean,
'version', 150000::integer,
'null_frac', 0.1::real,
'avg_width', 2::integer,
'n_distinct', 0.3::real);
-- error: relation not found
SELECT pg_catalog.pg_clear_relation_stats(
relation => 'stats_import.nope'::regclass);
-- error: attribute is system column
SELECT pg_catalog.pg_clear_attribute_stats(
relation => 'stats_import.test'::regclass,
attname => 'ctid'::name,
inherited => false::boolean);
-- error: attname doesn't exist
SELECT pg_catalog.pg_clear_attribute_stats(
relation => 'stats_import.test'::regclass,
attname => 'nope'::name,
inherited => false::boolean);
DROP SCHEMA stats_import CASCADE;
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