I am trying to build a new search accelerator as described in Section 2.5 of the Monet Extension Language (MEL) User Guide (http://monetdb.cwi.nl/TechDocs/Core/mel/index.html). When I execute mel on my module definition it does not seem to recognize the ".ACCELERATOR" key word. In Section 3.5, "Implementing Accelerators" the 'mean' accelerator implementation is described. Is there an example of the module definition of 'mean' in MEL?

I also looked at the mel source code and found that in buildtools/_MEL/mel.yy it appears that 'accelerator' is not part of the grammar for a module:

---- definition: atomdef | command | iterator | builtin | operator | object | MEL_PRELUDE '=' ident ';' { $$.sym = new Prelude(MEL_PRELUDE, $3.s); } | MEL_EPILOGUE '=' ident ';' { $$.sym = new Epilogue(MEL_EPILOGUE, $3.s); } ; ---

Questions: (1) Are user defined search accelerator modules actually supported in MonetDB? (2) If so, is there an example of such an accelerator module? (3) If not, what would be the best way to integrate a new index technique into the system?

Thanks! -John