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Add lo_truncate() to backend and libpq for large object truncation.

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Kris Jurka
This commit is contained in:
Bruce Momjian
2007-03-03 19:52:47 +00:00
parent 90d76525c5
commit 0763a56501
12 changed files with 372 additions and 26 deletions
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19
src/test/regress/input/largeobject.source
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@@ -83,6 +83,25 @@ SELECT lo_close(fd) FROM lotest_stash_values;
END;
-- Test truncation.
BEGIN;
UPDATE lotest_stash_values SET fd=lo_open(loid, CAST((2 | 4) * 16^4 AS integer));
SELECT lo_truncate(fd, 10) FROM lotest_stash_values;
SELECT loread(fd, 15) FROM lotest_stash_values;
SELECT lo_truncate(fd, 10000) FROM lotest_stash_values;
SELECT loread(fd, 10) FROM lotest_stash_values;
SELECT lo_lseek(fd, 0, 2) FROM lotest_stash_values;
SELECT lo_tell(fd) FROM lotest_stash_values;
SELECT lo_truncate(fd, 5000) FROM lotest_stash_values;
SELECT lo_lseek(fd, 0, 2) FROM lotest_stash_values;
SELECT lo_tell(fd) FROM lotest_stash_values;
SELECT lo_close(fd) FROM lotest_stash_values;
END;
-- lo_unlink(lobjId oid) returns integer
-- return value appears to always be 1
SELECT lo_unlink(loid) from lotest_stash_values;