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From "Thomas Fischer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (TORQUE-27) Need ability to pass global user-configurable platform-specific hints to templates
Date Sat, 15 Jul 2006 08:22:14 GMT
    [ http://issues.apache.org/jira/browse/TORQUE-27?page=comments#action_12421298 ] 
Thomas Fischer commented on TORQUE-27:

First of all, you can tell mysql to use innoDB as default for new tables in the database's
my.conf, if that is the only problem.

Then I agree with Thoralf that replacing the emplate is inflexible and error-prone, there
should be a better way to do it (like being able to "override" or "extend" templates), but
this is a big task and would need a major rewrite of the generator. 

Also I agree with Thoralf that if hints are added, they should be added to the schema.

A minor point is that hints will break compatibility with other databases. Up to now, if you
write a db schema in Torque and do not use "bad words" (i.e. words that are reserved in one
or more databases), you could create your schema on any database. I would expect hints not
to be standardized in any way, so this would break compatibility.

Last, I do not know  whether hints are used in other databases than mysql. If they are not
used in other databases, I do not think the schema should be cluttered up by a mysql-specific

> Need ability to pass global user-configurable platform-specific hints to templates
> ----------------------------------------------------------------------------------
>                 Key: TORQUE-27
>                 URL: http://issues.apache.org/jira/browse/TORQUE-27
>             Project: Torque
>          Issue Type: Improvement
>          Components: Generator
>    Affects Versions: 3.2
>         Environment: Fedora Core 5 Linux, Sun JDK1.4.2_08.
>            Reporter: Adrian Price
>            Priority: Minor
> It would be useful to provide a generic mechanism to enable the user to pass global platform-specific
hints to templates. For example, for MySQL it is desirable to explicitly specify the type
of table to be created, e.g., CREATE TABLE foo (...) Type = InnoDB. Such global hints could
then be specified by the user through platform specific properties or property files, as in:

> platform.properties:
> mysql.table.hint=Type = InnoDB. 
> A matching table.vm template might look something like:
> # -----------------------------------------------------------------------
> # $table.Name
> # -----------------------------------------------------------------------
> $generator.parse("$basepath/drop.vm", "", "table", $tbl)
> CREATE TABLE $table.Name
> (
> etc...
> ) $platform.getProperty('mysql.table.hint');
> Without such a capability it is necessary to hard-code the required customizations into
the templates, which is a rather inflexible and inconvenient way of doing it.

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