Thanks Mike for the trick :) I have created an issue on Bitbucket as you asked here: https://bitbucket.org/zzzeek/sqlalchemy/issues/4337/aggregate_order_by-doesnt-accept-multiple .
Cheers, Pierre On Wednesday, September 19, 2018 at 3:26:32 PM UTC+2, Mike Bayer wrote: > > On Wed, Sep 19, 2018 at 5:56 AM pierre collet <[email protected] > <javascript:>> wrote: > > > > Hello, > > > > I am using SQLAlchemy on a PostgreSQL database and I was very pleased to > find the aggregate_order_by function (http://docs.sqlalchemy.org/ccept > ten/latest/dialects/postgresql.html#sqlalchemy.dialects.postgresql.aggregate_order_by). > > > > > > Though, I am wondering why the "order_by" argument of the function takes > only one column while Postgresql definitely accepts to order by a set of > columns: > > > > For instance: > > SELECT array_agg(status ORDER BY pk_col1, pk_col2) FROM > table_with_pk_on_two_columns GROUP BY col_x; > > works fine on my PostgreSQL 9.6 database. > > > > Am I missing something or is this simply not yet implemented? > > order_by can be turned into a "*order_by" if you can help by adding a > bug report , for now you can send in a ClauseList: > > >>> from sqlalchemy.dialects.postgresql import aggregate_order_by > >>> from sqlalchemy import column > >>> from sqlalchemy.dialects import postgresql > >>> from sqlalchemy.sql.expression import ClauseList > >>> elem = aggregate_order_by(column('a'), ClauseList(column('b').asc(), > column('c').desc())) > >>> print(elem.compile(dialect=postgresql.dialect())) > a ORDER BY b ASC, c DESC > > > > > > > > Thank you. > > Pierre. > > > > > > > > -- > > SQLAlchemy - > > The Python SQL Toolkit and Object Relational Mapper > > > > http://www.sqlalchemy.org/ > > > > To post example code, please provide an MCVE: Minimal, Complete, and > Verifiable Example. See http://stackoverflow.com/help/mcve for a full > description. > > --- > > You received this message because you are subscribed to the Google > Groups "sqlalchemy" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] <javascript:>. > > To post to this group, send email to [email protected] > <javascript:>. > > Visit this group at https://groups.google.com/group/sqlalchemy. > > For more options, visit https://groups.google.com/d/optout. > -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
