[Caml-list] [ANN] Macaque 0.7 and 0.7.1

[Caml-list] [ANN] Macaque 0.7 and 0.7.1

[Jacques-Pascal Deplaix]

Hello,

We're happy to announce the double release of macaque 0.7 and 0.7.1.

Macaque is a type-safe and composable way to interact with SQL databases 
from OCaml. We propose a form of "comprehension syntax" that allow to 
modularly create queries in a strongly-typed and relatively principled way.

Macaque is hosted on github at:

https://github.com/ocsigen/macaque

The packages are available on opam.

Those two new releases come with some features and tiny breaking changes.

The new main features are:
     - macaque now handles UNION, INTERSECT and EXCEPT:
        * Postgresql documentation: 
http://www.postgresql.org/docs/9.3/static/queries-union.html
        * Macaque example: << union ({t.foo} | t in $table1$) ({t.foo} | 
t in $table2$) ({t.foo} | t in $table3$) >>
     - new aggregate function: md5:
        * Postgresql documentation: 
http://www.postgresql.org/docs/9.3/static/functions-string.html
        * Macaque example: << group {hash = md5[t.foo]} | t in $table$ >>
     - a new operator: IN:
        * Postgresql documentation: 
http://www.postgresql.org/docs/9.3/static/functions-comparisons.html#AEN18448 

        * Macaque example: << {t.foo} | t in $table$; in' t.id $ids$ >> 
(where ids being a list of postgresql integers)


Breaking changes:
     - We've fixed the type of current_timestamp so this should be 
changed in your code (see the change bellow)
     - We've also changed the way of calling operators. So the following 
code:
         <:table< table (
             date timestamp NOT NULL DEFAULT(current_timestamp)
          ) >>
       should have to change to something like:
         <:table< table (
             date timestamp NOT NULL DEFAULT(localtimestamp ())
          ) >>
       (The first change is about the name and the second about the 
argument added)


Full details:

0.7.1:
     - Works with PGOCaml >= 2.0. int32_array is now mapped to int32 
option array
     instead of int32 array

0.7:
     - Switch to OASIS
     - Add support for UNION, INTERSECT, EXCEPT and their UNION ALL variant
     - Add short types: nullable_data and non_nullable_data
     - Add support for SQL function/operators: md5, IN
     - Support unary operators (BREAKING CHANGE)
     - Current_timestamp now using timestamptz + adding localtimestamp 
for timestamp