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CREATE TABLE test1 (a int, b text);
INSERT INTO test1 VALUES (1, 'one');
CREATE INDEX test1_a_idx ON test1 USING brin (a);
SELECT brin_page_type(get_raw_page('test1_a_idx', 0));
SELECT brin_page_type(get_raw_page('test1_a_idx', 1));
SELECT brin_page_type(get_raw_page('test1_a_idx', 2));
SELECT * FROM brin_metapage_info(get_raw_page('test1_a_idx', 0));
SELECT * FROM brin_metapage_info(get_raw_page('test1_a_idx', 1));
SELECT * FROM brin_revmap_data(get_raw_page('test1_a_idx', 0)) LIMIT 5;
SELECT * FROM brin_revmap_data(get_raw_page('test1_a_idx', 1)) LIMIT 5;
SELECT * FROM brin_page_items(get_raw_page('test1_a_idx', 2), 'test1_a_idx')
ORDER BY blknum, attnum LIMIT 5;
DROP TABLE test1;
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