On 08/27/2010 09:21 PM, Michael Bayer wrote:
you coerce incoming arguments into expressions at the constructor level:
from sqlalchemy.sql.expression import _literal_as_column
class MyWhatever(ColumnElement):
def __init__(self, expr, ...):
self.expr = _literal_as_column(expr)
Recently Postgres added a new aggregate function called string_agg().
I have been able to use it like:
Session.query(Asset, func.string_agg(some_col, ','))
This works, but according to the docs I should be able to do
string_agg(some_col, ',' ORDER BY some_col)
Is there a way to do this in
I should have linked to the docs in question
http://developer.postgresql.org/pgdocs/postgres/sql-expressions.html#SYNTAX-AGGREGATES
On 08/27/2010 03:03 PM, David Gardner wrote:
Recently Postgres added a new aggregate function called string_agg().
I have been able to use it like:
On 08/27/2010 05:06 PM, David Gardner wrote:
I should have linked to the docs in question
http://developer.postgresql.org/pgdocs/postgres/sql-expressions.html#SYNTAX-AGGREGATES
On 08/27/2010 03:03 PM, David Gardner wrote:
Recently Postgres added a new aggregate function called string_agg().
Fantastic! That works.
Out of curiosity I noticed that the compile function expects to receive
instances of Column.
This isn't a big problem because I just reverted to doing
table_var.c.my_col, but is there
a simpler way to use MyClassName.Col?
On 08/27/2010 04:02 PM, Conor wrote:
On
On Aug 27, 2010, at 8:56 PM, David Gardner wrote:
Fantastic! That works.
Out of curiosity I noticed that the compile function expects to receive
instances of Column.
This isn't a big problem because I just reverted to doing table_var.c.my_col,
but is there
a simpler way to use
