Tom Lane f2c4ffc330 Fix potential infinite loop in regular expression execution. ... In cfindloop(), if the initial call to shortest() reports that a zero-length match is possible at the current search start point, but then it is unable to construct any actual match to that, it'll just loop around with the same start point, and thus make no progress. We need to force the start point to be advanced. This is safe because the loop over "begin" points has already tried and failed to match starting at "close", so there is surely no need to try that again. This bug was introduced in commit e2bd904955, wherein we allowed continued searching after we'd run out of match possibilities, but evidently failed to think hard enough about exactly where we needed to search next. Because of the way this code works, such a match failure is only possible in the presence of backrefs --- otherwise, shortest()'s judgment that a match is possible should always be correct. That probably explains how come the bug has escaped detection for several years. The actual fix is a one-liner, but I took the trouble to add/improve some comments related to the loop logic. After fixing that, the submitted test case "()*\1" didn't loop anymore. But it reported failure, though it seems like it ought to match a zero-length string; both Tcl and Perl think it does. That seems to be from overenthusiastic optimization on my part when I rewrote the iteration match logic in commit 173e29aa5d: we can't just "declare victory" for a zero-length match without bothering to set match data for capturing parens inside the iterator node. Per fuzz testing by Greg Stark. The first part of this is a bug in all supported branches, and the second part is a bug since 9.2 where the iteration rewrite happened.		2015-10-02 14:26:36 -04:00
..
.gitignore	Add a SECURITY LABEL command.	2010-09-27 20:55:27 -04:00
abstime.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
advisory_lock.sql	Add transaction-level advisory locks.	2011-02-18 14:05:12 +09:00
aggregates.sql	Share transition state between different aggregates when possible.	2015-08-04 17:53:10 +03:00
alter_generic.sql	Fix some typos in regression test comments.	2015-07-05 13:14:38 -04:00
alter_operator.sql	Fix entirely broken permissions test in new alter_operator regression test.	2015-07-17 14:10:52 -04:00
alter_table.sql	Fix pg_dump to handle inherited NOT VALID check constraints correctly.	2015-10-01 16:20:13 -04:00
arrays.sql	Fix bug around assignment expressions containing indirections.	2015-07-24 11:52:07 +02:00
async.sql	Add new function pg_notification_queue_usage.	2015-07-17 09:12:03 -04:00
bit.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
bitmapops.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
boolean.sql	Clean up references to SQL92	2013-04-20 11:04:41 -04:00
box.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
brin.sql	Fix brin regression test so it actually tests cidr.	2015-06-04 15:24:22 -04:00
btree_index.sql	Add test cases for indexam operations not currently covered.	2014-11-19 19:47:43 +02:00
case.sql	Clean up references to SQL92	2013-04-20 11:04:41 -04:00
char.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
circle.sql	Support ORDER BY ... NULLS FIRST/LAST, and add ASC/DESC/NULLS FIRST/NULLS LAST	2007-01-09 02:14:16 +00:00
cluster.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
collate.linux.utf8.sql	Support range data types.	2011-11-03 13:42:15 +02:00
collate.sql	Show sort ordering options in EXPLAIN output.	2015-01-16 18:19:00 -05:00
combocid.sql	Avoid incrementing the CommandCounter when CommandCounterIncrement is called	2007-11-30 21:22:54 +00:00
comments.sql	Implement nested block comments in the backend and in psql.	2000-07-14 15:43:57 +00:00
conversion.sql	Improve test for CONVERT() with GB18030 <-> UTF8.	2015-05-15 17:03:23 -04:00
copy2.sql	Fix null-pointer-deref crash while doing COPY IN with check constraints.	2015-02-15 23:26:45 -05:00
copyselect.sql	Have \copy go through SendQuery	2012-01-25 18:22:00 -03:00
create_aggregate.sql	Allow polymorphic aggregates to have non-polymorphic state data types.	2014-04-23 19:17:41 -04:00
create_cast.sql	Make CREATE TYPE print warnings if a datatype's I/O functions are volatile.	2014-11-05 11:44:06 -05:00
create_function_3.sql	Move regression test listing of builtin leakproof functions to opr_sanity.sql.	2014-06-05 13:54:25 +02:00
create_index.sql	Don't warn about creating temporary or unlogged hash indexes.	2015-06-26 11:37:32 -04:00
create_misc.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
create_operator.sql	Allow named parameters to be specified using => in addition to :=	2015-03-10 11:09:41 -04:00
create_table.sql	Fix lost persistence setting during REINDEX INDEX	2015-03-30 16:01:44 -03:00
create_table_like.sql	Allow CREATE TABLE (LIKE ...) from composite type	2012-03-03 16:03:05 +02:00
create_type.sql	Fix pg_dump to dump shell types.	2015-08-04 19:34:12 -04:00
create_view.sql	Partial fix for dropped columns in functions returning composite.	2014-07-19 14:28:52 -04:00
date.sql	Add make_date() and make_time() functions.	2013-11-17 15:06:50 -05:00
delete.sql	Regression tests for TOAST.	2011-04-25 09:48:10 -04:00
dependency.sql	Create a separate grantable privilege for TRUNCATE, rather than having it be	2008-09-08 00:47:41 +00:00
domain.sql	Use the typcache to cache constraints for domain types.	2015-03-01 14:06:55 -05:00
drop_if_exists.sql	Make DROP IF EXISTS more consistently not fail	2014-01-23 14:40:29 -03:00
enum.sql	Allow adding values to an enum type created in the current transaction.	2012-12-01 14:27:30 -05:00
equivclass.sql	Fix some more problems with nested append relations.	2014-10-01 19:31:12 -04:00
errors.sql	Allow empty target list in SELECT.	2013-12-14 20:23:26 -05:00
event_trigger.sql	Rearrange the handling of error context reports.	2015-09-05 11:58:33 -04:00
float4.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
float8.sql	Revert "Add some regression test cases for denormalized float8 input."	2012-02-04 15:52:09 -05:00
foreign_data.sql	Allow foreign tables to participate in inheritance.	2015-03-22 13:53:21 -04:00
foreign_key.sql	Fix overlooked relcache invalidation in ALTER TABLE ... ALTER CONSTRAINT.	2015-05-03 11:30:24 -04:00
functional_deps.sql	Recognize functional dependency on primary keys. This allows a table's	2010-08-07 02:44:09 +00:00
geometry.sql	Add geometry/range functions to support BRIN inclusion	2015-05-05 15:22:24 -03:00
gin.sql	Add test cases for indexam operations not currently covered.	2014-11-19 19:47:43 +02:00
gist.sql	Fix potential platform dependence in gist regression test.	2015-08-25 11:43:37 -04:00
groupingsets.sql	Fix flattening of nested grouping sets.	2015-07-26 16:50:29 +02:00
guc.sql	Add an optional missing_ok argument to SQL function current_setting().	2015-07-02 16:41:07 -04:00
hash_index.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
horology.sql	Fix to_timestamp/to_date's handling of consecutive spaces in format string.	2014-01-20 13:45:51 -05:00
hs_primary_extremes.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
hs_primary_setup.sql	Allow read only connections during recovery, known as Hot Standby.	2009-12-19 01:32:45 +00:00
hs_standby_allowed.sql	regression test: fix hot standby tests by using repeatable read	2014-04-22 17:23:58 -04:00
hs_standby_check.sql	Allow read only connections during recovery, known as Hot Standby.	2009-12-19 01:32:45 +00:00
hs_standby_disallowed.sql	Allow read only connections during recovery, known as Hot Standby.	2009-12-19 01:32:45 +00:00
hs_standby_functions.sql	Allow read only connections during recovery, known as Hot Standby.	2009-12-19 01:32:45 +00:00
indirect_toast.sql	Add support for multiple kinds of external toast datums.	2013-07-02 13:38:55 -04:00
inet.sql	Add geometry/range functions to support BRIN inclusion	2015-05-05 15:22:24 -03:00
inherit.sql	Fix eclass_useful_for_merging to give valid results for appendrel children.	2015-08-06 20:14:53 -04:00
insert.sql	Regression tests for TOAST.	2011-04-25 09:48:10 -04:00
insert_conflict.sql	Fix ON CONFLICT DO UPDATE for tables with oids.	2015-09-28 19:29:44 +02:00
int2.sql	Add documentation and regression tests concerning rounding of numerics.	2015-07-03 17:04:39 -04:00
int4.sql	Add documentation and regression tests concerning rounding of numerics.	2015-07-03 17:04:39 -04:00
int8.sql	Add documentation and regression tests concerning rounding of numerics.	2015-07-03 17:04:39 -04:00
interval.sql	interval: tighten precision specification	2014-10-18 10:31:00 -04:00
join.sql	Improve regression test case to avoid depending on system catalog stats.	2015-08-13 13:25:22 -04:00
json.sql	Fix treatment of nulls in jsonb_agg and jsonb_object_agg	2015-07-24 09:40:46 -04:00
jsonb.sql	Fix the fastpath rule for jsonb_concat with an empty operand.	2015-09-13 17:06:45 -04:00
limit.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
line.sql	Revert "Tweak "line" test to avoid negative zeros on some platforms"	2013-10-25 15:50:31 -04:00
lock.sql	Add a basic atomic ops API abstracting away platform/architecture details.	2014-09-25 23:49:05 +02:00
lseg.sql	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
macaddr.sql	Allow input format xxxx-xxxx-xxxx for macaddr type	2014-10-21 16:16:39 -04:00
matview.sql	Add CINE option for CREATE TABLE AS and CREATE MATERIALIZED VIEW	2014-12-13 13:56:09 -05:00
money.sql	Add casts from int4 and int8 to numeric.	2011-04-05 09:35:43 -04:00
name.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
namespace.sql	Regression tests for SCHEMA commands	2013-12-11 20:45:15 +00:00
numeric.sql	Fix possible internal overflow in numeric multiplication.	2015-09-21 12:11:32 -04:00
numeric_big.sql	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
numerology.sql	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
object_address.sql	Add transforms to pg_get_object_address and friends	2015-06-21 16:08:49 -03:00
oid.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
oidjoins.sql	Update oidjoins regression test for 9.5.	2015-07-25 15:46:26 -04:00
opr_sanity.sql	Check that all aliases of a built-in function have same leakproof property.	2015-05-29 13:26:21 -04:00
path.sql	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
pg_lsn.sql	Tweak new regression test case for better portability.	2014-06-04 21:31:41 -04:00
plancache.sql	Change plan caching to honor, not resist, changes in search_path.	2013-01-25 14:14:41 -05:00
plpgsql.sql	Tweak wording of syntax error messages about bad CONTINUE/EXIT statements.	2015-08-23 17:34:47 -04:00
point.sql	Fix gist_box_same and gist_point_consistent to handle fuzziness correctly.	2013-02-08 18:03:17 -05:00
polygon.sql	regression tests: remove polygon diagrams	2015-03-19 22:10:52 -04:00
polymorphism.sql	Allow named parameters to be specified using => in addition to :=	2015-03-10 11:09:41 -04:00
portals.sql	Fix failure to set ActiveSnapshot while rewinding a cursor.	2014-05-07 14:25:11 -04:00
portals_p2.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
prepare.sql	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
prepared_xacts.sql	Remove unnecessary and unreliable test	2015-02-20 14:03:49 -03:00
privileges.sql	Improve regression test coverage of table lock modes vs permissions.	2015-07-07 14:35:35 -07:00
psql.sql	Rearrange the handling of error context reports.	2015-09-05 11:58:33 -04:00
random.sql	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
rangefuncs.sql	Support flattening of empty-FROM subqueries and one-row VALUES tables.	2015-03-11 23:18:03 -04:00
rangetypes.sql	Add geometry/range functions to support BRIN inclusion	2015-05-05 15:22:24 -03:00
regex.sql	Fix potential infinite loop in regular expression execution.	2015-10-02 14:26:36 -04:00
regproc.sql	Add new OID alias type regnamespace	2015-05-09 13:36:52 -04:00
reltime.sql	Add a "USING" clause to DELETE, which is equivalent to the FROM clause	2005-04-07 01:51:41 +00:00
replica_identity.sql	psql: conditionally display oids and replication identity	2014-04-15 13:28:54 -04:00
returning.sql	Add support for INSERT ... ON CONFLICT DO NOTHING/UPDATE.	2015-05-08 05:43:10 +02:00
roleattributes.sql	Clean up roles from roleattributes test	2015-08-21 15:51:24 -04:00
rolenames.sql	Allow CURRENT/SESSION_USER to be used in certain commands	2015-03-09 15:41:54 -03:00
rowsecurity.sql	Ensure a few policies remain for pg_upgrade	2015-09-28 15:48:36 -04:00
rowtypes.sql	Ensure that RowExprs and whole-row Vars produce the expected column names.	2014-11-10 15:21:09 -05:00
rules.sql	Fix yet another bug in ON CONFLICT rule deparsing.	2015-05-23 02:16:24 +02:00
sanity_check.sql	Use unaligned output in selected regression queries to reduce diff noise.	2013-10-26 11:24:04 -04:00
security_label.sql	Move security_label test	2014-12-01 16:12:43 -03:00
select.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
select_distinct.sql	Alter some gratuitous uses of "ANSI" when "SQL standard" might have been	2009-07-11 21:15:32 +00:00
select_distinct_on.sql	Fix assertion failure when a SELECT DISTINCT ON expression is volatile.	2009-09-12 00:04:59 +00:00
select_having.sql	Make the behavior of HAVING without GROUP BY conform to the SQL spec.	2005-03-10 23:21:26 +00:00
select_implicit.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
select_into.sql	Restructure SELECT INTO's parsetree representation into CreateTableAsStmt.	2012-03-19 21:38:12 -04:00
select_views.sql	Improve qual pushdown for RLS and SB views	2015-04-27 12:29:42 -04:00
sequence.sql	Add tests for sequence privileges	2014-10-22 21:39:07 -04:00
spgist.sql	Add test cases for indexam operations not currently covered.	2014-11-19 19:47:43 +02:00
stats.sql	Have TRUNCATE update pgstat tuple counters	2015-02-20 12:10:01 -03:00
strings.sql	Fix regexp_matches() handling of zero-length matches.	2013-07-31 11:31:22 -04:00
subselect.sql	Add support for INSERT ... ON CONFLICT DO NOTHING/UPDATE.	2015-05-08 05:43:10 +02:00
tablesample.sql	Redesign tablesample method API, and do extensive code review.	2015-07-25 14:39:00 -04:00
temp.sql	Don't refer to the database name "regression" inside the regression test	2008-07-03 16:01:10 +00:00
text.sql	Move checking an explicit VARIADIC "any" argument into the parser.	2013-07-18 11:52:12 -04:00
time.sql	Please find attached two patches for documentation and regression tests	2006-07-06 01:46:38 +00:00
timestamp.sql	Constructors for interval, timestamp, timestamptz	2014-03-04 15:09:43 -03:00
timestamptz.sql	Don't require bleeding-edge timezone data in timestamptz regression test.	2014-11-18 21:36:39 -05:00
timetz.sql	Please find attached two patches for documentation and regression tests	2006-07-06 01:46:38 +00:00
tinterval.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
transactions.sql	Fix subtransaction cleanup after an outer-subtransaction portal fails.	2015-09-04 13:37:14 -04:00
triggers.sql	Add support for INSERT ... ON CONFLICT DO NOTHING/UPDATE.	2015-05-08 05:43:10 +02:00
truncate.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
tsdicts.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
tsearch.sql	Fix ts_rank_cd() to ignore stripped lexemes	2014-03-24 14:37:16 -04:00
tstypes.sql	Extend GIN to support partial-match searches, and extend tsquery to support	2008-05-16 16:31:02 +00:00
txid.sql	Handle duplicate XIDs in txid_snapshot.	2014-05-15 18:29:20 +03:00
type_sanity.sql	In type_sanity, check I/O functions of built-in types are not volatile.	2014-10-23 15:59:40 -04:00
typed_table.sql	Only allow typed tables to hang off composite types, not e.g. tables.	2011-04-18 10:19:46 -04:00
union.sql	Forward-patch regression test for "could not find pathkey item to sort".	2014-06-26 10:41:48 -07:00
updatable_views.sql	Add support for INSERT ... ON CONFLICT DO NOTHING/UPDATE.	2015-05-08 05:43:10 +02:00
update.sql	Add support for INSERT ... ON CONFLICT DO NOTHING/UPDATE.	2015-05-08 05:43:10 +02:00
uuid.sql	Fix whitespace issues found by git diff --check, add gitattributes	2013-11-10 14:48:29 -05:00
vacuum.sql	Avoid unexpected slowdown in vacuum regression test.	2015-01-12 15:13:53 -05:00
varchar.sql	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
window.sql	Allow pushdown of WHERE quals into subqueries with window functions.	2014-06-27 23:08:08 -07:00
with.sql	Add support for INSERT ... ON CONFLICT DO NOTHING/UPDATE.	2015-05-08 05:43:10 +02:00
without_oid.sql	Combine cmin and cmax fields of HeapTupleHeaders into a single field, by	2007-02-09 03:35:35 +00:00
xml.sql	Fix namespace handling in xpath function	2015-01-06 23:06:13 -05:00
xmlmap.sql	Add regression tests for XML mapping of domains	2013-03-13 22:42:57 -04:00