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Diffstat (limited to 'src/test/isolation/specs/truncate-conflict.spec')
| -rw-r--r-- | src/test/isolation/specs/truncate-conflict.spec | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/isolation/specs/truncate-conflict.spec b/src/test/isolation/specs/truncate-conflict.spec new file mode 100644 index 0000000..0f77ff0 --- /dev/null +++ b/src/test/isolation/specs/truncate-conflict.spec @@ -0,0 +1,38 @@ +# Tests for locking conflicts with TRUNCATE commands. + +setup +{ + CREATE ROLE regress_truncate_conflict; + CREATE TABLE truncate_tab (a int); +} + +teardown +{ + DROP TABLE truncate_tab; + DROP ROLE regress_truncate_conflict; +} + +session s1 +step s1_begin { BEGIN; } +step s1_tab_lookup { SELECT count(*) >= 0 FROM truncate_tab; } +step s1_commit { COMMIT; } + +session s2 +step s2_grant { GRANT TRUNCATE ON truncate_tab TO regress_truncate_conflict; } +step s2_auth { SET ROLE regress_truncate_conflict; } +step s2_truncate { TRUNCATE truncate_tab; } +step s2_reset { RESET ROLE; } + +# The role doesn't have privileges to truncate the table, so TRUNCATE should +# immediately fail without waiting for a lock. +permutation s1_begin s1_tab_lookup s2_auth s2_truncate s1_commit s2_reset +permutation s1_begin s2_auth s2_truncate s1_tab_lookup s1_commit s2_reset +permutation s1_begin s2_auth s1_tab_lookup s2_truncate s1_commit s2_reset +permutation s2_auth s2_truncate s1_begin s1_tab_lookup s1_commit s2_reset + +# The role has privileges to truncate the table, TRUNCATE will block if +# another session holds a lock on the table and succeed in all cases. +permutation s1_begin s1_tab_lookup s2_grant s2_auth s2_truncate s1_commit s2_reset +permutation s1_begin s2_grant s2_auth s2_truncate s1_tab_lookup s1_commit s2_reset +permutation s1_begin s2_grant s2_auth s1_tab_lookup s2_truncate s1_commit s2_reset +permutation s2_grant s2_auth s2_truncate s1_begin s1_tab_lookup s1_commit s2_reset |