1 CREATE TABLE test1 (a int, b text);
2 INSERT INTO test1 VALUES (1, 'one');
3 CREATE INDEX test1_a_idx ON test1 USING brin (a);
4 SELECT brin_page_type(get_raw_page('test1_a_idx', 0));
10 SELECT brin_page_type(get_raw_page('test1_a_idx', 1));
16 SELECT brin_page_type(get_raw_page('test1_a_idx', 2));
22 SELECT * FROM brin_metapage_info(get_raw_page('test1_a_idx', 0));
23 magic | version | pagesperrange | lastrevmappage
24 ------------+---------+---------------+----------------
25 0xA8109CFA | 1 | 128 | 1
28 SELECT * FROM brin_metapage_info(get_raw_page('test1_a_idx', 1));
29 ERROR: page is not a BRIN page of type "metapage"
30 DETAIL: Expected special type 0000f091, got 0000f092.
31 SELECT * FROM brin_revmap_data(get_raw_page('test1_a_idx', 0)) LIMIT 5;
32 ERROR: page is not a BRIN page of type "revmap"
33 DETAIL: Expected special type 0000f092, got 0000f091.
34 SELECT * FROM brin_revmap_data(get_raw_page('test1_a_idx', 1)) LIMIT 5;
44 SELECT * FROM brin_page_items(get_raw_page('test1_a_idx', 2), 'test1_a_idx')
45 ORDER BY blknum, attnum LIMIT 5;
46 itemoffset | blknum | attnum | allnulls | hasnulls | placeholder | empty | value
47 ------------+--------+--------+----------+----------+-------------+-------+----------
48 1 | 0 | 1 | f | f | f | f | {1 .. 1}
51 -- Mask DETAIL messages as these are not portable across architectures.
53 -- Failures for non-BRIN index.
54 CREATE INDEX test1_a_btree ON test1 (a);
55 SELECT brin_page_items(get_raw_page('test1_a_btree', 0), 'test1_a_btree');
56 ERROR: "test1_a_btree" is not a BRIN index
57 SELECT brin_page_items(get_raw_page('test1_a_btree', 0), 'test1_a_idx');
58 ERROR: input page is not a valid BRIN page
59 -- Invalid special area size
60 SELECT brin_page_type(get_raw_page('test1', 0));
61 ERROR: input page is not a valid BRIN page
62 SELECT * FROM brin_metapage_info(get_raw_page('test1', 0));
63 ERROR: input page is not a valid BRIN page
64 SELECT * FROM brin_revmap_data(get_raw_page('test1', 0));
65 ERROR: input page is not a valid BRIN page
66 \set VERBOSITY default
67 -- Tests with all-zero pages.
69 SELECT brin_page_type(decode(repeat('00', :block_size), 'hex'));
75 SELECT brin_page_items(decode(repeat('00', :block_size), 'hex'), 'test1_a_idx');
80 SELECT brin_metapage_info(decode(repeat('00', :block_size), 'hex'));
86 SELECT brin_revmap_data(decode(repeat('00', :block_size), 'hex'));
92 -- Test that partial indexes have all pages, including empty ones.
93 CREATE TABLE test2 (a int);
94 INSERT INTO test2 SELECT i FROM generate_series(1,1000) s(i);
95 -- No rows match the index predicate, make sure the index has the right number
96 -- of ranges (same as number of page ranges).
97 CREATE INDEX ON test2 USING brin (a) WITH (pages_per_range=1) WHERE (a IS NULL);
99 -- Does the index have one summary of the relation?
100 SELECT (COUNT(*) = (SELECT relpages FROM pg_class WHERE relname = 'test2')) AS ranges_do_match
101 FROM generate_series((SELECT (lastrevmappage + 1) FROM brin_metapage_info(get_raw_page('test2_a_idx', 0))),
102 (SELECT (relpages - 1) FROM pg_class WHERE relname = 'test2_a_idx')) AS pages(p),
103 LATERAL brin_page_items(get_raw_page('test2_a_idx', p), 'test2_a_idx') AS items;
111 -- Test that parallel index build produces the same BRIN index as serial build.
112 CREATE TABLE brin_parallel_test (a int, b text, c bigint) WITH (fillfactor=40);
113 -- Generate a table with a mix of NULLs and non-NULL values (and data suitable
114 -- for the different opclasses we build later).
115 INSERT INTO brin_parallel_test
116 SELECT (CASE WHEN (mod(i,231) = 0) OR (i BETWEEN 3500 AND 4000) THEN NULL ELSE i END),
117 (CASE WHEN (mod(i,233) = 0) OR (i BETWEEN 3750 AND 4250) THEN NULL ELSE md5(i::text) END),
118 (CASE WHEN (mod(i,233) = 0) OR (i BETWEEN 3850 AND 4500) THEN NULL ELSE (i/100) + mod(i,8) END)
119 FROM generate_series(1,5000) S(i);
120 -- Build an index with different opclasses - minmax, bloom and minmax-multi.
122 -- For minmax and opclass this is simple, but for minmax-multi we need to be
123 -- careful, because the result depends on the order in which values are added
124 -- to the summary, which in turn affects how are values merged etc. The order
125 -- of merging results from workers has similar effect. All those summaries
126 -- should produce correct query results, but it means we can't compare them
127 -- using equality (which is what EXCEPT does). To work around this issue, we
128 -- generated the data to only have very small number of distinct values per
129 -- range, so that no merging is needed. This makes the results deterministic.
130 -- build index without parallelism
131 SET max_parallel_maintenance_workers = 0;
132 CREATE INDEX brin_test_serial_idx ON brin_parallel_test
133 USING brin (a int4_minmax_ops, a int4_bloom_ops, b, c int8_minmax_multi_ops)
134 WITH (pages_per_range=7)
135 WHERE NOT (a BETWEEN 1000 and 1500);
136 -- build index using parallelism
138 -- Set a couple parameters to force parallel build for small table. There's a
139 -- requirement for table size, so disable that. Also, plan_create_index_workers
140 -- assumes each worker will use work_mem=32MB for sorting (which works for btree,
141 -- but not really for BRIN), so we set maintenance_work_mem for 4 workers.
142 SET min_parallel_table_scan_size = 0;
143 SET max_parallel_maintenance_workers = 4;
144 SET maintenance_work_mem = '128MB';
145 CREATE INDEX brin_test_parallel_idx ON brin_parallel_test
146 USING brin (a int4_minmax_ops, a int4_bloom_ops, b, c int8_minmax_multi_ops)
147 WITH (pages_per_range=7)
148 WHERE NOT (a BETWEEN 1000 and 1500);
149 SELECT relname, relpages
151 WHERE relname IN ('brin_test_serial_idx', 'brin_test_parallel_idx')
154 ------------------------+----------
155 brin_test_parallel_idx | 3
156 brin_test_serial_idx | 3
159 -- Check that (A except B) and (B except A) is empty, which means the indexes
161 SELECT * FROM brin_page_items(get_raw_page('brin_test_parallel_idx', 2), 'brin_test_parallel_idx')
163 SELECT * FROM brin_page_items(get_raw_page('brin_test_serial_idx', 2), 'brin_test_serial_idx');
164 itemoffset | blknum | attnum | allnulls | hasnulls | placeholder | empty | value
165 ------------+--------+--------+----------+----------+-------------+-------+-------
168 SELECT * FROM brin_page_items(get_raw_page('brin_test_serial_idx', 2), 'brin_test_serial_idx')
170 SELECT * FROM brin_page_items(get_raw_page('brin_test_parallel_idx', 2), 'brin_test_parallel_idx');
171 itemoffset | blknum | attnum | allnulls | hasnulls | placeholder | empty | value
172 ------------+--------+--------+----------+----------+-------------+-------+-------
175 DROP INDEX brin_test_parallel_idx;
176 -- force parallel build, but don't allow starting parallel workers to force
177 -- fallback to serial build, and repeat the checks
178 SET max_parallel_workers = 0;
179 CREATE INDEX brin_test_parallel_idx ON brin_parallel_test
180 USING brin (a int4_minmax_ops, a int4_bloom_ops, b, c int8_minmax_multi_ops)
181 WITH (pages_per_range=7)
182 WHERE NOT (a BETWEEN 1000 and 1500);
183 SELECT relname, relpages
185 WHERE relname IN ('brin_test_serial_idx', 'brin_test_parallel_idx')
188 ------------------------+----------
189 brin_test_parallel_idx | 3
190 brin_test_serial_idx | 3
193 SELECT * FROM brin_page_items(get_raw_page('brin_test_parallel_idx', 2), 'brin_test_parallel_idx')
195 SELECT * FROM brin_page_items(get_raw_page('brin_test_serial_idx', 2), 'brin_test_serial_idx');
196 itemoffset | blknum | attnum | allnulls | hasnulls | placeholder | empty | value
197 ------------+--------+--------+----------+----------+-------------+-------+-------
200 SELECT * FROM brin_page_items(get_raw_page('brin_test_serial_idx', 2), 'brin_test_serial_idx')
202 SELECT * FROM brin_page_items(get_raw_page('brin_test_parallel_idx', 2), 'brin_test_parallel_idx');
203 itemoffset | blknum | attnum | allnulls | hasnulls | placeholder | empty | value
204 ------------+--------+--------+----------+----------+-------------+-------+-------
207 DROP TABLE brin_parallel_test;
208 RESET min_parallel_table_scan_size;
209 RESET max_parallel_maintenance_workers;
210 RESET maintenance_work_mem;