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2084701364
This function reads directly a page from a relation, relying on index_open() to open the index to read from. Unfortunately, this would crash when using partitioned indexes, as these can be opened with index_open() but they have no physical pages. Alexander has fixed the module, while I have written the test. Author: Alexander Lakhin, Michael Paquier Discussion: https://postgr.es/m/18246-f4d9ff7cb3af77e6@postgresql.org Backpatch-through: 12
114 lines
4.8 KiB
SQL
114 lines
4.8 KiB
SQL
CREATE TABLE test_hash (a int, b text);
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INSERT INTO test_hash VALUES (1, 'one');
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CREATE INDEX test_hash_a_idx ON test_hash USING hash (a);
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CREATE TABLE test_hash_part (a int, b int) PARTITION BY RANGE (a);
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CREATE INDEX test_hash_part_idx ON test_hash_part USING hash(b);
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\x
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SELECT hash_page_type(get_raw_page('test_hash_a_idx', 0));
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SELECT hash_page_type(get_raw_page('test_hash_a_idx', 1));
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SELECT hash_page_type(get_raw_page('test_hash_a_idx', 2));
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SELECT hash_page_type(get_raw_page('test_hash_a_idx', 3));
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SELECT hash_page_type(get_raw_page('test_hash_a_idx', 4));
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SELECT hash_page_type(get_raw_page('test_hash_a_idx', 5));
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SELECT hash_page_type(get_raw_page('test_hash_a_idx', 6));
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SELECT * FROM hash_bitmap_info('test_hash_a_idx', -1);
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SELECT * FROM hash_bitmap_info('test_hash_a_idx', 0);
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SELECT * FROM hash_bitmap_info('test_hash_a_idx', 1);
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SELECT * FROM hash_bitmap_info('test_hash_a_idx', 2);
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SELECT * FROM hash_bitmap_info('test_hash_a_idx', 3);
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SELECT * FROM hash_bitmap_info('test_hash_a_idx', 4);
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SELECT * FROM hash_bitmap_info('test_hash_a_idx', 5);
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SELECT * FROM hash_bitmap_info('test_hash_a_idx', 6);
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SELECT * FROM hash_bitmap_info('test_hash_part_idx', 1); -- error
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SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
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lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
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hash_metapage_info(get_raw_page('test_hash_a_idx', 0));
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SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
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lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
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hash_metapage_info(get_raw_page('test_hash_a_idx', 1));
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SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
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lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
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hash_metapage_info(get_raw_page('test_hash_a_idx', 2));
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SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
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lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
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hash_metapage_info(get_raw_page('test_hash_a_idx', 3));
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SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
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lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
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hash_metapage_info(get_raw_page('test_hash_a_idx', 4));
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SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
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lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
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hash_metapage_info(get_raw_page('test_hash_a_idx', 5));
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SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
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hasho_bucket, hasho_flag, hasho_page_id FROM
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hash_page_stats(get_raw_page('test_hash_a_idx', 0));
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SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
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hasho_bucket, hasho_flag, hasho_page_id FROM
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hash_page_stats(get_raw_page('test_hash_a_idx', 1));
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SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
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hasho_bucket, hasho_flag, hasho_page_id FROM
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hash_page_stats(get_raw_page('test_hash_a_idx', 2));
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SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
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hasho_bucket, hasho_flag, hasho_page_id FROM
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hash_page_stats(get_raw_page('test_hash_a_idx', 3));
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SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
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hasho_bucket, hasho_flag, hasho_page_id FROM
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hash_page_stats(get_raw_page('test_hash_a_idx', 4));
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SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
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hasho_bucket, hasho_flag, hasho_page_id FROM
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hash_page_stats(get_raw_page('test_hash_a_idx', 5));
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SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 0));
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SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 1));
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SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 2));
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SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 3));
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SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 4));
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SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 5));
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-- Failure with non-hash index
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CREATE INDEX test_hash_a_btree ON test_hash USING btree (a);
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SELECT hash_bitmap_info('test_hash_a_btree', 0);
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-- Failure with various modes.
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-- Suppress the DETAIL message, to allow the tests to work across various
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-- page sizes and architectures.
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\set VERBOSITY terse
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-- invalid page size
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SELECT hash_metapage_info('aaa'::bytea);
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SELECT hash_page_items('bbb'::bytea);
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SELECT hash_page_stats('ccc'::bytea);
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SELECT hash_page_type('ddd'::bytea);
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-- invalid special area size
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SELECT hash_metapage_info(get_raw_page('test_hash', 0));
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SELECT hash_page_items(get_raw_page('test_hash', 0));
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SELECT hash_page_stats(get_raw_page('test_hash', 0));
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SELECT hash_page_type(get_raw_page('test_hash', 0));
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\set VERBOSITY default
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-- Tests with all-zero pages.
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SHOW block_size \gset
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SELECT hash_metapage_info(decode(repeat('00', :block_size), 'hex'));
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SELECT hash_page_items(decode(repeat('00', :block_size), 'hex'));
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SELECT hash_page_stats(decode(repeat('00', :block_size), 'hex'));
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SELECT hash_page_type(decode(repeat('00', :block_size), 'hex'));
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DROP TABLE test_hash;
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DROP TABLE test_hash_part;
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