> o Allow DEFERRABLE and end-of-statement UNIQUE constraints?
>
> This would allow UPDATE tab SET col = col + 1 to work if col has
> a unique index. Currently, uniqueness checks are done while the
> command is being executed, rather than at the end of the statement
> or transaction.
>
<
< * Allow DEFERRABLE and end-of-statement UNIQUE constraints?
<
< This would allow UPDATE tab SET col = col + 1 to work if col has
< a unique index. Currently, uniqueness checks are done while the
< command is being executed, rather than at the end of the statement
< or transaction.
< * Allow DEFERRABLE UNIQUE constraints?
> * Allow DEFERRABLE and end-of-statement UNIQUE constraints?
>
> This would allow UPDATE tab SET col = col + 1 to work if col has
> a unique index. Currently, uniqueness checks are done while the
> command is being executed, rather than at the end of the statement
> or transaction.
>
< * All backends running as threads in a single process (not want)
> * All backends running as threads in a single process (not wanted)
< * Optimizer hints (not want)
> * Optimizer hints (not wanted)
>
> * Allow AS in "SELECT col AS label" to be optional (not wanted)
>
> Because we support postfix operators, it isn't possible to make AS
> optional and continue to use bison.
> http://archives.postgresql.org/pgsql-sql/2006-08/msg00164.php
< o Allow COPY to output from SELECT
> o Allow COPY (SELECT ...) TO 'filename'
< COPY should also be able to output views.
> COPY should also be able to output views using COPY (SELECT
> * FROM view) TO 'filename' internally.
< * %Disallow changing DEFAULT expression of a SERIAL column?
<
< This should be done only if the existing SERIAL problems cannot be
< fixed.
<
< * %Disallow ALTER SEQUENCE changes for SERIAL sequences because pg_dump
< does not dump the changes
< o Allow INSERT/UPDATE ... RETURNING new.col or old.col
<
< This is useful for returning the auto-generated key for an INSERT.
< One complication is how to handle rules that run as part of
< the insert.
< http://archives.postgresql.org/pgsql-patches/2005-07/msg00568.php
> o -Allow INSERT/UPDATE ... RETURNING new.col or old.col
>
>
> Features We Do _Not_ Want
> =========================
>
> * All backends running as threads in a single process (not want)
>
> This eliminates the process protection we get from the current setup.
> Thread creation is usually the same overhead as process creation on
> modern systems, so it seems unwise to use a pure threaded model.
>
> * Optimizer hints (not want)
>
> Optimizer hints are used to work around problems in the optimizer. We
> would rather have the problems reported and fixed.
> http://archives.postgresql.org/pgsql-hackers/2006-08/msg00506.php
< A package would be a schema with its own variables,
< private functions, and initialization functions. It
> A package would be a schema with public/private variables,
> public/private functions, and initialization functions. It
< private functions, and initialization functions
> private functions, and initialization functions. It
> is also possible to implement these capabilities
> in all schemas and not use a separate "packages"
> syntax at all.
< o Automatically force archiving of partially-filled WAL files when
> o -Automatically force archiving of partially-filled WAL files when
<
< Doing this will allow administrators to know more easily when
< the archive contains all the files needed for point-in-time
< recovery.
< http://archives.postgresql.org/pgsql-patches/2005-04/msg00121.php
<
< o Add reporting of the current WAL file and offset, perhaps as
> o -Add reporting of the current WAL file and offset, perhaps as
<
< The offset allows parts of a WAL file to be archived using
< an external program.
<
< o Allow point-in-time recovery to archive partially filled
< write-ahead logs? [pitr]
> o Add command to archive partially filled write-ahead logs? [pitr]
< of a disk failure. This could be triggered by a user command or
< a timer.
> of a disk failure.
< recovery. A function call to do this would also be useful.
> recovery.
> o Add reporting of the current WAL file and offset, perhaps as
> part of partial log file archiving
>
> The offset allows parts of a WAL file to be archived using
> an external program.
>
< o Add reporting of the current WAL file and offset, perhaps as
< part of partial log file archiving
<
< The offset allows parts of a WAL file to be archived using
< an external program.
< o Add reporting of the current WAL file, perhaps as part of
< partial log file archiving
> o Add reporting of the current WAL file and offset, perhaps as
> part of partial log file archiving
< o Add ALTER TABLE tab ADD/DROP INHERITS parent
<
< This allows tables to be added/removed from an inheritance
< hierarchy. This is particularly useful for table partitioning.
< http://archives.postgresql.org/pgsql-hackers/2006-05/msg00988.php
<
> o -Add ALTER TABLE tab INHERIT / NO INHERIT parent
< o Add support for WITH HOLD cursors
> o Add support for WITH HOLD and SCROLL cursors
>
> PL/pgSQL cursors should support the same syntax as
> backend cursors.
>
< * %Disallow changing DEFAULT expression of a SERIAL column?
<
< This should be done only if the existing SERIAL problems cannot be
< fixed.
<
> * -Disallow changing DEFAULT expression of a SERIAL column
< * Reuse index tuples that point to rows that are not visible to anyone?
> * Reuse index tuples that point to heap tuples that are not visible to
> anyone?
< * Allow heap reuse of UPDATEd rows if old and new versions are on the
< same heap page?
> * Allow heap reuse of UPDATEd rows if no indexed columns are changed,
> and old and new versions are on the same heap page?
< This is possible for same-page updates because a single index row
< can point to both old and new values.
> While vacuum handles DELETEs fine, updating of non-indexed columns, like
> counters, are difficult for VACUUM to handle efficiently. This method
> is possible for same-page updates because a single index row can be
> used to point to both old and new values.
>
> * Allow heap reuse of UPDATEd rows if old and new versions are on the
> same heap page?
>
> This is possible for same-page updates because a single index row
> can point to both old and new values.
> http://archives.postgresql.org/pgsql-hackers/2006-06/msg01305.php
section into PL/pgSQL and non-PL/pgSQL sections:
< o Fix PL/pgSQL RENAME to work on variables other than OLD/NEW
< o Allow function parameters to be passed by name,
< get_employee_salary(emp_id => 12345, tax_year => 2001)
< o Add Oracle-style packages
< o Add table function support to pltcl, plpython
< o Add capability to create and call PROCEDURES
< o Allow PL/pgSQL to handle %TYPE arrays, e.g. tab.col%TYPE[]
< o Allow function argument names to be statements from PL/PgSQL
< o Add MOVE to PL/pgSQL
< o Add support for polymorphic arguments and return types to
< languages other than PL/PgSQL
< o Add support for OUT and INOUT parameters to languages other
< than PL/PgSQL
< o Add single-step debugging of PL/PgSQL functions
< o Allow PL/PgSQL to support WITH HOLD cursors
< o Allow PL/PgSQL RETURN to return row or record functions
<
< http://archives.postgresql.org/pgsql-patches/2005-11/msg00045.php
> o PL/pgSQL
> o Fix RENAME to work on variables other than OLD/NEW
> o Allow function parameters to be passed by name,
> get_employee_salary(emp_id => 12345, tax_year => 2001)
> o Add Oracle-style packages
> o Allow handling of %TYPE arrays, e.g. tab.col%TYPE[]
> o Allow listing of record column names, and access to
> record columns via variables, e.g. columns := r.(*),
> tval2 := r.(colname)
>
> http://archives.postgresql.org/pgsql-patches/2005-07/msg00458.php
> http://archives.postgresql.org/pgsql-patches/2006-05/msg00302.php
> http://archives.postgresql.org/pgsql-patches/2006-06/msg00031.php
>
> o Add MOVE
> o Add single-step debugging of functions
> o Add support for WITH HOLD cursors
> o Allow PL/RETURN to return row or record functions
>
> http://archives.postgresql.org/pgsql-patches/2005-11/msg00045.php
>
>
> o Other
> o Add table function support to pltcl, plpython
> o Add support for polymorphic arguments and return types to
> languages other than PL/PgSQL
> o Add capability to create and call PROCEDURES
> o Add support for OUT and INOUT parameters to languages other
> than PL/PgSQL
<
< o Add new version of PQescapeString() that doesn't double backslashes
< that are part of a client-only multibyte sequence
<
< Single-quote is not a valid byte in any supported client-only
< encoding. This requires using mblen() to determine if the
< backslash is inside or outside a multi-byte sequence.
<
< o Add new version of PQescapeString() that doesn't double
< backslashes when standard_conforming_strings is true and
< non-E strings are used
