On Fri, Jan 23, 2015 at 12:17 PM, SF Markus Elfring <elfr...@users.sourceforge.net> wrote: >>> The parameter "IF NOT EXISTS" could be passed to the SQL statement "CREATE >>> TABLE". >>> >>> * Is this setting already used by the class library "SQLAlchemy 0.9.8-78.1"? >> >> From a quick scan of the docs it appears not. > > How can parameter additions be achieved for this software? >
The general mechanism for generating SQL that isn't directly supported by SQLAlchemy is to use the "compiler" module: http://docs.sqlalchemy.org/en/rel_0_9/core/compiler.html I guess it's the CreateTable object you'd need to adapt: http://docs.sqlalchemy.org/en/rel_0_9/core/ddl.html Although this sounds to me like a reasonable flag to add to core (it's supported by multiple database implementations), so perhaps if you added support for it directly into SQLAlchemy, Mike might accept that patch. > >> Are you asking if "IF NOT EXISTS" will work in a high-concurrency context? > > Yes. > > How many database implementations support the simultaneous table creation > according to the rules from transaction management? > No idea. You'd need to ask the makers of all the databases you are interested in. Simon -- 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 post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
