String schemaPath = URLDecoder.decode(ddlurl.getPath(), "UTF-8");
VoltCompiler compiler = new VoltCompiler();
hsql = HSQLInterface.loadHsqldb();
//hsql.runDDLFile(schemaPath);
DDLCompiler ddl_compiler = new DDLCompiler(compiler, hsql);
ddl_compiler.loadSchema(schemaPath);
ddl_compiler.compileToCatalog(catalog, db);
}