mirror of
https://github.com/postgres/postgres.git
synced 2025-10-25 13:17:41 +03:00
1fd3dd2048
This is like the existing bt_page_stats() function, but it can report on a range of pages rather than just one at a time. I don't have a huge amount of faith in the portability of the new test cases, but they do pass in a 32-bit FreeBSD VM here. Further adjustment may be needed depending on buildfarm results. Hamid Akhtar, reviewed by Naeem Akhter, Bertrand Drouvot, Bharath Rupireddy, and myself Discussion: https://postgr.es/m/CANugjht-=oGMRmNJKMqnBC69y7vr+wHDmm0ZK6-1pJsxoBKBbA@mail.gmail.com
63 lines
2.4 KiB
SQL
63 lines
2.4 KiB
SQL
CREATE TABLE test1 (a int8, b int4range);
|
|
INSERT INTO test1 VALUES (72057594037927937, '[0,1)');
|
|
CREATE INDEX test1_a_idx ON test1 USING btree (a);
|
|
|
|
\x
|
|
|
|
SELECT * FROM bt_metap('test1_a_idx');
|
|
|
|
SELECT * FROM bt_page_stats('test1_a_idx', -1);
|
|
SELECT * FROM bt_page_stats('test1_a_idx', 0);
|
|
SELECT * FROM bt_page_stats('test1_a_idx', 1);
|
|
SELECT * FROM bt_page_stats('test1_a_idx', 2);
|
|
|
|
-- bt_multi_page_stats() function returns a set of records of page statistics.
|
|
CREATE TABLE test2 AS (SELECT generate_series(1, 1000)::int8 AS col1);
|
|
CREATE INDEX test2_col1_idx ON test2(col1);
|
|
SELECT * FROM bt_multi_page_stats('test2_col1_idx', 0, 1);
|
|
SELECT * FROM bt_multi_page_stats('test2_col1_idx', 1, -1);
|
|
SELECT * FROM bt_multi_page_stats('test2_col1_idx', 1, 0);
|
|
SELECT * FROM bt_multi_page_stats('test2_col1_idx', 1, 2);
|
|
SELECT * FROM bt_multi_page_stats('test2_col1_idx', 3, 2);
|
|
SELECT * FROM bt_multi_page_stats('test2_col1_idx', 7, 2);
|
|
DROP TABLE test2;
|
|
|
|
SELECT * FROM bt_page_items('test1_a_idx', -1);
|
|
SELECT * FROM bt_page_items('test1_a_idx', 0);
|
|
SELECT * FROM bt_page_items('test1_a_idx', 1);
|
|
SELECT * FROM bt_page_items('test1_a_idx', 2);
|
|
|
|
SELECT * FROM bt_page_items(get_raw_page('test1_a_idx', -1));
|
|
SELECT * FROM bt_page_items(get_raw_page('test1_a_idx', 0));
|
|
SELECT * FROM bt_page_items(get_raw_page('test1_a_idx', 1));
|
|
SELECT * FROM bt_page_items(get_raw_page('test1_a_idx', 2));
|
|
|
|
-- Failure when using a non-btree index.
|
|
CREATE INDEX test1_a_hash ON test1 USING hash(a);
|
|
SELECT bt_metap('test1_a_hash');
|
|
SELECT bt_page_stats('test1_a_hash', 0);
|
|
SELECT bt_page_items('test1_a_hash', 0);
|
|
SELECT bt_page_items(get_raw_page('test1_a_hash', 0));
|
|
CREATE INDEX test1_b_gist ON test1 USING gist(b);
|
|
-- Special area of GiST is the same as btree, this complains about inconsistent
|
|
-- leaf data on the page.
|
|
SELECT bt_page_items(get_raw_page('test1_b_gist', 0));
|
|
|
|
-- Several failure modes.
|
|
-- Suppress the DETAIL message, to allow the tests to work across various
|
|
-- page sizes and architectures.
|
|
\set VERBOSITY terse
|
|
-- invalid page size
|
|
SELECT bt_page_items('aaa'::bytea);
|
|
-- invalid special area size
|
|
CREATE INDEX test1_a_brin ON test1 USING brin(a);
|
|
SELECT bt_page_items(get_raw_page('test1', 0));
|
|
SELECT bt_page_items(get_raw_page('test1_a_brin', 0));
|
|
\set VERBOSITY default
|
|
|
|
-- Tests with all-zero pages.
|
|
SHOW block_size \gset
|
|
SELECT bt_page_items(decode(repeat('00', :block_size), 'hex'));
|
|
|
|
DROP TABLE test1;
|