Expose arguments of o.s.d.r.c.sql.SimpleFunction [DATAJDBC-478]

[spring-projects-issues]

Mark Paluch opened DATAJDBC-478 and commented

We should expose the arguments of a SimpleFunction to allow introspection. In R2DBC, we take Expression objects and attempt to map these against the entity metamodel to derive the column name from a property.

			SimpleFunction function = (SimpleFunction) expression;
			DirectFieldAccessor accessor = new DirectFieldAccessor(function);

			List<Expression> arguments = (List<Expression>) accessor.getPropertyValue("expressions");
			List<Expression> mappedArguments = new ArrayList<>(arguments.size());

			for (Expression argument : arguments) {
				mappedArguments.add(getMappedObject(argument, entity));
			}

			SimpleFunction mappedFunction = SimpleFunction.create(function.getFunctionName(), mappedArguments);

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No further details from DATAJDBC-478