public void checkComplexExpressionParsing() throws Exception{
FrameworkConfig config = Frameworks.newConfigBuilder() //
.lex(Lex.MYSQL) //
.parserFactory(DrillParserImpl.FACTORY) //
.defaultSchema(SimpleOptiqSchema.createRootSchema(false)) //
.convertletTable(new DrillConvertletTable()) //
.build();
Planner planner = Frameworks.getPlanner(config);
SqlNode node = planner.parse(""
+ "select a[4].c \n"