postgresql

History

Tom Lane 37507962c3 Handle unexpected query results, especially NULLs, safely in connectby(). connectby() didn't adequately check that the constructed SQL query returns what it's expected to; in fact, since commit `08c33c426b` it wasn't checking that at all. This could result in a null-pointer-dereference crash if the constructed query returns only one column instead of the expected two. Less excitingly, it could also result in surprising data conversion failures if the constructed query returned values that were not I/O-conversion-compatible with the types specified by the query calling connectby(). In all branches, insist that the query return at least two columns; this seems like a minimal sanity check that can't break any reasonable use-cases. In HEAD, insist that the constructed query return the types specified by the outer query, including checking for typmod incompatibility, which the code never did even before it got broken. This is to hide the fact that the implementation does a conversion to text and back; someday we might want to improve that. In back branches, leave that alone, since adding a type check in a minor release is more likely to break things than make people happy. Type inconsistencies will continue to work so long as the actual type and declared type are I/O representation compatible, and otherwise will fail the same way they used to. Also, in all branches, be on guard for NULL results from the constructed query, which formerly would cause null-pointer dereference crashes. We now print the row with the NULL but don't recurse down from it. In passing, get rid of the rather pointless idea that build_tuplestore_recursively() should return the same tuplestore that's passed to it. Michael Paquier, adjusted somewhat by me		2015-01-29 20:18:33 -05:00
..
adminpack	Update copyright for 2015	2015-01-06 11:43:47 -05:00
auth_delay	Add file version information to most installed Windows binaries.	2014-07-14 14:07:52 -04:00
auto_explain	Rearrange explain.c's API so callers need not embed sizeof(ExplainState).	2015-01-15 13:39:33 -05:00
btree_gin	Turn much of the btree_gin macros into real functions.	2014-12-22 17:11:53 +02:00
btree_gist	Remove dead NULL-pointer checks in GiST code.	2015-01-28 10:03:58 +02:00
chkpass	Fix volatility markings of some contrib I/O functions.	2014-11-05 11:34:11 -05:00
citext	Fix citext upgrade script for disallowance of oidvector element assignment.	2014-08-28 18:21:05 -04:00
cube	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
dblink	Fix volatile-safety issue in dblink's materializeQueryResult().	2015-01-26 15:17:33 -05:00
dict_int	Update copyright for 2015	2015-01-06 11:43:47 -05:00
dict_xsyn	Update copyright for 2015	2015-01-06 11:43:47 -05:00
earthdistance	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
file_fdw	Update copyright for 2015	2015-01-06 11:43:47 -05:00
fuzzystrmatch	Replace a bunch more uses of strncpy() with safer coding.	2015-01-24 13:05:42 -05:00
hstore	Silence Coverity warnings about unused return values from pushJsonbValue()	2015-01-13 14:33:05 +02:00
intagg	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
intarray	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
isn	Replace a bunch more uses of strncpy() with safer coding.	2015-01-24 13:05:42 -05:00
lo	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
ltree	Fix volatility markings of some contrib I/O functions.	2014-11-05 11:34:11 -05:00
oid2name	Add file version information to most installed Windows binaries.	2014-07-14 14:07:52 -04:00
pageinspect	Update copyright for 2015	2015-01-06 11:43:47 -05:00
passwordcheck	Update copyright for 2015	2015-01-06 11:43:47 -05:00
pg_archivecleanup	Replace a few strncmp() calls with strlcpy().	2014-08-18 22:59:31 -04:00
pg_buffercache	Align buffer descriptors to cache line boundaries.	2015-01-29 22:48:45 +01:00
pg_freespacemap	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
pg_prewarm	Update copyright for 2015	2015-01-06 11:43:47 -05:00
pg_standby	pg_standby: Avoid writing one byte beyond the end of the buffer.	2015-01-15 09:26:03 -05:00
pg_stat_statements	Prevent duplicate escape-string warnings when using pg_stat_statements.	2015-01-22 18:11:00 -05:00
pg_test_fsync	Avoid file descriptor leak in pg_test_fsync.	2014-11-19 12:06:24 -05:00
pg_test_timing	Correctly handle test durations of more than 2147s in pg_test_timing.	2015-01-04 15:44:49 +01:00
pg_trgm	Replace a bunch more uses of strncpy() with safer coding.	2015-01-24 13:05:42 -05:00
pg_upgrade	pg_upgrade: fix one-byte per empty db memory leak	2015-01-09 12:12:30 -05:00
pg_upgrade_support	Update copyright for 2015	2015-01-06 11:43:47 -05:00
pg_xlogdump	Update copyright for 2015	2015-01-06 11:43:47 -05:00
pgbench	Replace a bunch more uses of strncpy() with safer coding.	2015-01-24 13:05:42 -05:00
pgcrypto	Replace a bunch more uses of strncpy() with safer coding.	2015-01-24 13:05:42 -05:00
pgrowlocks	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
pgstattuple	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
postgres_fdw	Update copyright for 2015	2015-01-06 11:43:47 -05:00
seg	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
sepgsql	Update copyright for 2015	2015-01-06 11:43:47 -05:00
spi	Fix typos in some error messages thrown by extension scripts when fed to psql.	2014-08-25 18:30:37 +02:00
sslinfo	Make Port->ssl_in_use available, even when built with !USE_SSL	2014-11-25 09:46:11 +02:00
start-scripts	doc: Reflect renaming of Mac OS X to OS X	2014-09-09 13:56:29 -04:00
tablefunc	Handle unexpected query results, especially NULLs, safely in connectby().	2015-01-29 20:18:33 -05:00
tcn	Update copyright for 2015	2015-01-06 11:43:47 -05:00
test_decoding	Update copyright for 2015	2015-01-06 11:43:47 -05:00
tsearch2	Update copyright for 2015	2015-01-06 11:43:47 -05:00
unaccent	Update copyright for 2015	2015-01-06 11:43:47 -05:00
uuid-ossp	Update copyright for 2015	2015-01-06 11:43:47 -05:00
vacuumlo	vacuumlo: Avoid unlikely memory leak.	2015-01-14 15:14:20 -05:00
xml2	Replace a bunch more uses of strncpy() with safer coding.	2015-01-24 13:05:42 -05:00
Makefile	Move test modules from contrib to src/test/modules	2014-11-29 23:55:00 -03:00
README	Rename 'gmake' to 'make' in docs and recommended commands	2014-02-12 17:29:19 -05:00
contrib-global.mk	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00

README

The PostgreSQL contrib tree
---------------------------

This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree.  This does not preclude their
usefulness.

User documentation for each module appears in the main SGML
documentation.

When building from the source distribution, these modules are not
built automatically, unless you build the "world" target.  You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.

Some directories supply new user-defined functions, operators, or
types.  To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command.  In a fresh database,
you can simply do

    CREATE EXTENSION module_name;

See the PostgreSQL documentation for more information about this
procedure.