Alright, thank you very much! Very informative. On Monday, January 20, 2020 at 10:29:10 PM UTC+3, Mike Bayer wrote: > > > > On Mon, Jan 20, 2020, at 2:26 PM, Mike Bayer wrote: > > > > On Mon, Jan 20, 2020, at 1:46 PM, Andrei Pashkin wrote: > > Hello! > > I wonder - is it possible to parametrize where expression as a whole like > that: > select([users_table]).where(bindparam('criteria')) > > > nope, that's not how SQL bound parameters work. > > > ? > > My use case is that I'd like to pre-compile a complex SQLAlchemy > expression to avoid redundant computations and achieve the same effect as > Bakery has for the ORM but only for a low-level SA expression. > > > Wait for SQLAlchemy 1.4, this will have that feature. > > > noting also, there is a cache feature for Core statements right now, you > just have to use the same statement object each time, since currently the > statement object itself is the cache key. See > https://docs.sqlalchemy.org/en/13/core/connections.html?highlight=compiled_cache#sqlalchemy.engine.Connection.execution_options.params.compiled_cache > > . This is what BakedQuery ultimately uses also and the unit of work uses > it also. > > In 1.4 all statements will be able to generate a separate cache key that > is repeatable for multiple instances of the same statement. > > > > > > > > > > > > > > -- > 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 sqlal...@googlegroups.com <javascript:>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sqlalchemy/c6a93f06-7ec4-4a00-bc8b-4e34f58e28ac%40googlegroups.com > > <https://groups.google.com/d/msgid/sqlalchemy/c6a93f06-7ec4-4a00-bc8b-4e34f58e28ac%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > > >
-- 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 sqlalchemy+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sqlalchemy/fc9351e0-5cb0-406d-b3d6-c827bd8bb219%40googlegroups.com.