diff --git a/doc/src/sgml/filelist.sgml b/doc/src/sgml/filelist.sgml index 30b5fca72d..f0da8adc72 100644 --- a/doc/src/sgml/filelist.sgml +++ b/doc/src/sgml/filelist.sgml @@ -1,4 +1,4 @@ - + @@ -145,6 +145,7 @@ + diff --git a/doc/src/sgml/release-9.1.sgml b/doc/src/sgml/release-9.1.sgml new file mode 100644 index 0000000000..dd9bd689bb --- /dev/null +++ b/doc/src/sgml/release-9.1.sgml @@ -0,0 +1,484 @@ + + + + + + Release 9.1alpha1 + + Overview + + PostgreSQL alpha releases are snapshots of development code. They + are intended to preview and test upcoming features and to provide + the possibility for early feedback. They should not be used in + production installations or active development projects. While the + PostgreSQL code is continuously subject to a number of automated + and manual tests, alpha releases might have serious bugs. Also + features may be changed incompatibly or removed at any time during + the development cycle. + + + The development cycle of a PostgreSQL major release alternates + between periods of development and periods of integration work, + called commit fests, normally one month each. Alpha releases are + planned to be produced at the end of every commit fest, thus every + two months. Since the first commit fest starts within a month from + the beginning of development altogether, early alpha releases are + not indicative of the likely feature set of the final release. + + + The release notes below highlight user visible changes and new + features. There are normally numerous bug fixes and performance + improvements in every new snapshot of PostgreSQL, and it would be + too bulky to attempt to list them all. Note that many bug fixes are + also backported to stable releases of PostgreSQL, and you should be + using those if you are looking for bug-fix-only upgrades for your + current installations. + + + These notes are cumulative over all alpha releases of the current + development cycle. Items that are new in the latest alpha release are + emphasized. + + + + Migration + + To upgrade from any release to an alpha release or from an alpha + release to any other release will most likely require a + dump/restore upgrade procedure. It may happen that this is not + necessary in particular cases, but that is not verified beforehand. + (The server will warn you in any case when a dump/restore is + necessary if you attempt to use it with an old data directory.) + Note, however, that the dump/restore upgrade procedure is expected + to work for alpha releases, and problems in this area should be + reported. + + + + Testing + + The primary reason we release alphas is to get users to test new + features as early as possible. If you are interested in helping + with organized testing, please see + the + testing information page. + + + + Changes + + SQL Features + + + + + Recognize functional dependency on primary + keys + + + This allows a table's other columns to be referenced without listing + them in GROUP BY, so long as the primary key column(s) are listed in + GROUP BY. + + + + + + Add CREATE TABLE IF NOT EXISTS + + + + + + + Performance + + + + + Reduce lock levels of CREATE TRIGGER and some ALTER + TABLE, CREATE RULE actions + + + + + + Add some knowledge about prefix matches to + tsmatchsel() + + + + + + Replace the naive HYPOT() macro with a + standards-conformant hypotenuse function + + + + + + + Server Settings + + + + + Change the default value of + standard_conforming_strings to + on + + + + This is a significant incompatibility with previous releases, + because it may break unwary applications in security-critical ways. + + + + + + + Add log_file_mode parameter + + + This allows control of the file permissions set on log files created + by the syslogger process. + + + + + + Add restart_after_crash parameter + + + Normally, we automatically restart after a backend crash, but in + some cases when PostgreSQL is invoked by clusterware it may be + desirable to suppress this behavior, so we now provide an option which + does that. + + + + + + + Administration and Monitoring + + + + + Make EXPLAIN show the function call expression of a + FunctionScan plan node, but only in VERBOSE mode + + + + + + Make EXPLAIN print PARAM_EXEC Params as + the referenced expressions, rather than just $N + + + + + + Add vacuum and analyze counters to pg_stat_*_tables + views + + + + + + Add stats functions and views to provide access to a + transaction's own statistics counts + + + + + + + Security + + + + + Add server authentication over Unix-domain + sockets + + + This adds a libpq connection parameter requirepeer that + specifies the user name that the server process is expected to run + under. + + + + + + + Built-In Functions + + + + + Add string functions: concat(), concat_ws(), left(), + right(), and reverse() + + + + + + Add three-parameter forms of array_to_string and + string_to_array + + + + + + Add XMLEXISTS function + + + + + + Add xpath_exists() function + + + This is equivalent to XMLEXISTS except that it offers support for + namespace mapping. + + + + + + Add xml_is_well_formed, xml_is_well_formed_document, + xml_is_well_formed_content functions to the core XML + code + + + These supersede a version previously offered by contrib/xml2. + + + + + + + Data Types + + + + + Allow numeric to use a more compact, 2-byte header in + many cases + + + + + + Add support for dividing money by money (yielding a + float8 result) and for casting between money and numeric + + + + + + + Server Tools + + + + + Add options to force quoting of all + identifiers + + + This includes a quote_all_identifiers parameter which affects the + behavior of the backend, and a --quote-all-identifiers argument to + pg_dump and pg_dumpall which sets the parameter and also affects the + quoting done internally by those applications. + + + + + + + psql + + + + + Add \conninfo command to psql, to show current connection + info + + + + + + Extend psql's \e and \ef commands so that a line number + can be specified, and the editor's cursor will be initially placed + on that line + + + To avoid assumptions about what switch the user's editor takes for + this purpose, there is a new psql variable EDITOR_LINENUMBER_SWITCH + with (at present) no default value. + + + + + + Add a \sf (show function) command to psql, for those + times when you need to look at a function but don't wish to fire up + an editor + + + + + + Make psql distinguish between unique indices and unique + constraints in \d printout + + + + + + + Procedural Languages + + PL/pgSQL + + + + + Modify the handling of RAISE without parameters so that + the error it throws can be caught in the same places that could + catch an ordinary RAISE ERROR in the same location + + + The previous coding insisted on throwing the error from the block + containing the active exception handler; which is arguably more + surprising, and definitely unlike Oracle's behavior. + + + + + + Remove ancient PL/pgSQL line numbering hack + + + PL/pgSQL used to count the second line of the function body as + line 1, if the first line was zero-length. + While this hack arguably has some benefit in terms of making + PL/pgsql's line numbering match the programmer's expectations, it + also makes PL/pgsql inconsistent with the remaining PLs, making it + difficult for clients to reliably determine where the error + actually is. On balance, it seems better to be consistent. + + + + + + + + Additional Supplied Modules + + + + + Add the ability to compute per-statement latencies (ie, + average execution times) to pgbench + + + + + + Teach levenshtein() about multi-byte + characters + + + + + + Add btree_gist support for searching on not + equals + + + + + + Add ssl_cipher() and ssl_version() functions to + contrib/sslinfo + + + + + + Remove the arbitrary (and undocumented) limit on the + number of parameter=value pairs that can be handled by + xslt_process() + + + + + + + Source Code, Build Options + + + + + Include the backend ID in the relpath of temporary + relations + + + This allows us to reliably remove all leftover temporary relation + files on cluster startup without reference to system catalogs or + WAL; therefore, we no longer include temporary relations in + XLOG_XACT_COMMIT and XLOG_XACT_ABORT WAL records. + + + + + + Rewrite COMMENT ON object code for better + modularity, and add necessary locking + + + + + + Add a hook in ExecCheckRTPerms() for eventual use by + external security-checking modules + + + + + + Standardize names and calling conventions of + get_whatever_oid functions + + + + + + Make NestLoop plan nodes pass outer-relation variables + into their inner relation using the general PARAM_EXEC executor + parameter mechanism, rather than the ad-hoc kluge of passing the + outer tuple down through ExecReScan + + + + + + Make details of the Numeric representation private to + numeric.c + + + + + + Suppress some compiler warnings from + clang + + + + + + + diff --git a/doc/src/sgml/release.sgml b/doc/src/sgml/release.sgml index fd64985fdb..748b8fada8 100644 --- a/doc/src/sgml/release.sgml +++ b/doc/src/sgml/release.sgml @@ -1,4 +1,4 @@ - + +&release-9.1; &release-9.0; &release-8.4; &release-8.3;