163 lines
9.8 KiB
Plaintext
163 lines
9.8 KiB
Plaintext
CREATE TABLE test_hash (a int, b text);
|
|
INSERT INTO test_hash VALUES (1, 'one');
|
|
CREATE INDEX test_hash_a_idx ON test_hash USING hash (a);
|
|
\x
|
|
SELECT hash_page_type(get_raw_page('test_hash_a_idx', 0));
|
|
-[ RECORD 1 ]--+---------
|
|
hash_page_type | metapage
|
|
|
|
SELECT hash_page_type(get_raw_page('test_hash_a_idx', 1));
|
|
-[ RECORD 1 ]--+-------
|
|
hash_page_type | bucket
|
|
|
|
SELECT hash_page_type(get_raw_page('test_hash_a_idx', 2));
|
|
-[ RECORD 1 ]--+-------
|
|
hash_page_type | bucket
|
|
|
|
SELECT hash_page_type(get_raw_page('test_hash_a_idx', 3));
|
|
-[ RECORD 1 ]--+-------
|
|
hash_page_type | bucket
|
|
|
|
SELECT hash_page_type(get_raw_page('test_hash_a_idx', 4));
|
|
-[ RECORD 1 ]--+-------
|
|
hash_page_type | bucket
|
|
|
|
SELECT hash_page_type(get_raw_page('test_hash_a_idx', 5));
|
|
-[ RECORD 1 ]--+-------
|
|
hash_page_type | bitmap
|
|
|
|
SELECT hash_page_type(get_raw_page('test_hash_a_idx', 6));
|
|
ERROR: block number 6 is out of range for relation "test_hash_a_idx"
|
|
SELECT * FROM hash_bitmap_info('test_hash_a_idx', 0);
|
|
ERROR: invalid overflow block number 0
|
|
SELECT * FROM hash_bitmap_info('test_hash_a_idx', 1);
|
|
ERROR: invalid overflow block number 1
|
|
SELECT * FROM hash_bitmap_info('test_hash_a_idx', 2);
|
|
ERROR: invalid overflow block number 2
|
|
SELECT * FROM hash_bitmap_info('test_hash_a_idx', 3);
|
|
ERROR: invalid overflow block number 3
|
|
SELECT * FROM hash_bitmap_info('test_hash_a_idx', 4);
|
|
ERROR: invalid overflow block number 4
|
|
SELECT * FROM hash_bitmap_info('test_hash_a_idx', 5);
|
|
ERROR: invalid overflow block number 5
|
|
SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
|
|
lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
|
|
hash_metapage_info(get_raw_page('test_hash_a_idx', 0));
|
|
-[ RECORD 1 ]--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|
magic | 105121344
|
|
version | 4
|
|
ntuples | 1
|
|
bsize | 8152
|
|
bmsize | 4096
|
|
bmshift | 15
|
|
maxbucket | 3
|
|
highmask | 7
|
|
lowmask | 3
|
|
ovflpoint | 2
|
|
firstfree | 0
|
|
nmaps | 1
|
|
procid | 450
|
|
spares | {0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
|
|
mapp | {5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
|
|
|
|
SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
|
|
lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
|
|
hash_metapage_info(get_raw_page('test_hash_a_idx', 1));
|
|
ERROR: page is not a hash meta page
|
|
SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
|
|
lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
|
|
hash_metapage_info(get_raw_page('test_hash_a_idx', 2));
|
|
ERROR: page is not a hash meta page
|
|
SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
|
|
lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
|
|
hash_metapage_info(get_raw_page('test_hash_a_idx', 3));
|
|
ERROR: page is not a hash meta page
|
|
SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
|
|
lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
|
|
hash_metapage_info(get_raw_page('test_hash_a_idx', 4));
|
|
ERROR: page is not a hash meta page
|
|
SELECT magic, version, ntuples, bsize, bmsize, bmshift, maxbucket, highmask,
|
|
lowmask, ovflpoint, firstfree, nmaps, procid, spares, mapp FROM
|
|
hash_metapage_info(get_raw_page('test_hash_a_idx', 5));
|
|
ERROR: page is not a hash meta page
|
|
SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
|
|
hasho_bucket, hasho_flag, hasho_page_id FROM
|
|
hash_page_stats(get_raw_page('test_hash_a_idx', 0));
|
|
ERROR: page is not a hash bucket or overflow page
|
|
SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
|
|
hasho_bucket, hasho_flag, hasho_page_id FROM
|
|
hash_page_stats(get_raw_page('test_hash_a_idx', 1));
|
|
-[ RECORD 1 ]---+-----------
|
|
live_items | 0
|
|
dead_items | 0
|
|
page_size | 8192
|
|
hasho_prevblkno | 3
|
|
hasho_nextblkno | 4294967295
|
|
hasho_bucket | 0
|
|
hasho_flag | 2
|
|
hasho_page_id | 65408
|
|
|
|
SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
|
|
hasho_bucket, hasho_flag, hasho_page_id FROM
|
|
hash_page_stats(get_raw_page('test_hash_a_idx', 2));
|
|
-[ RECORD 1 ]---+-----------
|
|
live_items | 0
|
|
dead_items | 0
|
|
page_size | 8192
|
|
hasho_prevblkno | 3
|
|
hasho_nextblkno | 4294967295
|
|
hasho_bucket | 1
|
|
hasho_flag | 2
|
|
hasho_page_id | 65408
|
|
|
|
SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
|
|
hasho_bucket, hasho_flag, hasho_page_id FROM
|
|
hash_page_stats(get_raw_page('test_hash_a_idx', 3));
|
|
-[ RECORD 1 ]---+-----------
|
|
live_items | 1
|
|
dead_items | 0
|
|
page_size | 8192
|
|
hasho_prevblkno | 3
|
|
hasho_nextblkno | 4294967295
|
|
hasho_bucket | 2
|
|
hasho_flag | 2
|
|
hasho_page_id | 65408
|
|
|
|
SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
|
|
hasho_bucket, hasho_flag, hasho_page_id FROM
|
|
hash_page_stats(get_raw_page('test_hash_a_idx', 4));
|
|
-[ RECORD 1 ]---+-----------
|
|
live_items | 0
|
|
dead_items | 0
|
|
page_size | 8192
|
|
hasho_prevblkno | 3
|
|
hasho_nextblkno | 4294967295
|
|
hasho_bucket | 3
|
|
hasho_flag | 2
|
|
hasho_page_id | 65408
|
|
|
|
SELECT live_items, dead_items, page_size, hasho_prevblkno, hasho_nextblkno,
|
|
hasho_bucket, hasho_flag, hasho_page_id FROM
|
|
hash_page_stats(get_raw_page('test_hash_a_idx', 5));
|
|
ERROR: page is not a hash bucket or overflow page
|
|
SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 0));
|
|
ERROR: page is not a hash bucket or overflow page
|
|
SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 1));
|
|
(0 rows)
|
|
|
|
SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 2));
|
|
(0 rows)
|
|
|
|
SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 3));
|
|
-[ RECORD 1 ]----------
|
|
itemoffset | 1
|
|
ctid | (0,1)
|
|
data | 2389907270
|
|
|
|
SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 4));
|
|
(0 rows)
|
|
|
|
SELECT * FROM hash_page_items(get_raw_page('test_hash_a_idx', 5));
|
|
ERROR: page is not a hash bucket or overflow page
|
|
DROP TABLE test_hash;
|