hi!
i'd like to propose a simple but effective methodology to auto register
additional db-functions to h2 just by having the user/admin making
additional jar files available on the classpath.
The H2-DB Engine would have to use the classloader to lookup all files
named '/META-INF/org.h2.ext.FunctionClass' (or similar) which would be a
simple text file containing one class-name by line to be considered.
then:
for each $class
{
if $class instanceof org.h2.api.AggregateFunction
{
registerFunctionClass($class)
}
else
{
scan $class for methods starting with 'FN_'
then registerFunctionMethod($class, $method, $fname)
}
}
for the MODE-Support already in H2 a filename
like '/META-INF/org.h2.ext.FunctionClass.$MODE' could be used.
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