Waiting for 9.5 – array_offset() and array_offsets()

On 18th of March, Alvaro Herrera committed patch:

array_offset() and array_offsets()
 
These functions return the offset position or positions of a value in an
array.
 
Author: Pavel Stěhule
Reviewed by: Jim Nasby

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Waiting for 9.5 – Support arrays as input to array_agg() and ARRAY(SELECT …).

On 25th of November, Tom Lane committed patch:

Support arrays as input to array_agg() and ARRAY(SELECT ...).
 
These cases formerly failed with errors about "could not find array type
for data type".  Now they yield arrays of the same element type and one
higher dimension.
 
The implementation involves creating functions with API similar to the
existing accumArrayResult() family.  I (tgl) also extended the base family
by adding an initArrayResult() function, which allows callers to avoid
special-casing the zero-inputs case if they just want an empty array as
result.  (Not all do, so the previous calling convention remains valid.)
This allowed simplifying some existing code in xml.c and plperl.c.
 
Ali Akbar, reviewed by Pavel Stehule, significantly modified by me

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Waiting for 9.3 – Add array_remove() and array_replace() functions.

On 11th of July, Tom Lane committed patch:

Add array_remove() and array_replace() functions. <span class="refs"> <span class="head" title="heads/master"><a href="/gitweb/?p=postgresql.git;a=shortlog;h=refs/heads/master">master
 
These functions support removing or replacing array element value(s)
matching a given search value.  Although intended mainly to support a
future array-foreign-key feature, they seem useful in their own right.
 
Marco Nenciarini and Gabriele Bartolini, reviewed by Alex Hunsaker

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Waiting for 9.1 – Arrays in PL/Perl

On 18th of February, Alvaro Herrera committed patch:

Convert Postgres arrays to Perl arrays on PL/perl input arguments
 
More generally, arrays are turned in Perl array references, and row and
composite types are turned into Perl hash references.  This is done
recursively, in a way that's natural to every Perl programmer.
 
To avoid a backwards compatibility hit, the string representation of
each structure is also available if the function requests it.
 
Authors: Alexey Klyukin and Alex Hunsaker.
Some code cleanups by me.

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Waiting for 8.4 – array aggregate and array unpacker

Finally, we got very important addons to PostgreSQL, which help with dealing with arrays.

It solves a lot of problems, which were usually solved with standard cookbook code, which was in faqs, blog posts and number of examples on irc.

Continue reading Waiting for 8.4 – array aggregate and array unpacker