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Add test coverage for rootdescend verification.

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Commit c1afd175, which added support for rootdescend verification to
amcheck, added only minimal regression test coverage.  Address this by
making sure that rootdescend verification is run on a multi-level index.
In passing, simplify some of the regression tests that exercise
multi-level nbtree page deletion.

Both issues spotted while rereviewing coverage of the nbtree patch
series using gcov.
This commit is contained in:
Peter Geoghegan
2019-04-04 17:25:35 -07:00
parent 86b85044e8
commit 344b7e11bb
4 changed files with 10 additions and 22 deletions
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13
contrib/amcheck/sql/check_btree.sql
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@ -69,13 +69,13 @@ COMMIT;
-- normal check outside of xact for index with included columns
SELECT bt_index_check('bttest_multi_idx');
-- more expansive test for index with included columns
SELECT bt_index_parent_check('bttest_multi_idx', true);
-- more expansive tests for index with included columns
SELECT bt_index_parent_check('bttest_multi_idx', true, true);
-- repeat expansive test for index built using insertions
-- repeat expansive tests for index built using insertions
TRUNCATE bttest_multi;
INSERT INTO bttest_multi SELECT i, i%2 FROM generate_series(1, 100000) as i;
SELECT bt_index_parent_check('bttest_multi_idx', true);
SELECT bt_index_parent_check('bttest_multi_idx', true, true);
--
-- Test for multilevel page deletion/downlink present checks, and rootdescend
@ -83,14 +83,11 @@ SELECT bt_index_parent_check('bttest_multi_idx', true);
--
INSERT INTO delete_test_table SELECT i, 1, 2, 3 FROM generate_series(1,80000) i;
ALTER TABLE delete_test_table ADD PRIMARY KEY (a,b,c,d);
-- Delete many entries, and vacuum. This causes page deletions.
DELETE FROM delete_test_table WHERE a > 40000;
VACUUM delete_test_table;
-- Delete most entries, and vacuum, deleting internal pages and creating "fast
-- root"
DELETE FROM delete_test_table WHERE a < 79990;
VACUUM delete_test_table;
SELECT bt_index_parent_check('delete_test_table_pkey', true, true);
SELECT bt_index_parent_check('delete_test_table_pkey', true);
--
-- BUG #15597: must not assume consistent input toasting state when forming