#109 - Fix simple type conversion for projection queries.

We now correctly consider built-in converters for simple types that are read through DatabaseClient. Simple type projections typically select a single column and expect a result stream of simple values such as selecting a count and retrieving a Mono<Long>.

src/main/java/org/springframework/data/r2dbc/core/DefaultReactiveDataAccessStrategy.java

@@ -76,7 +76,8 @@ public class DefaultReactiveDataAccessStrategy implements ReactiveDataAccessStra
 		Assert.notNull(dialect, "Dialect must not be null");
 
 		R2dbcCustomConversions customConversions = new R2dbcCustomConversions(
-				StoreConversions.of(dialect.getSimpleTypeHolder()), Collections.emptyList());
+				StoreConversions.of(dialect.getSimpleTypeHolder(), R2dbcCustomConversions.STORE_CONVERTERS),
+				Collections.emptyList());
 
 		RelationalMappingContext context = new RelationalMappingContext();
 		context.setSimpleTypeHolder(customConversions.getSimpleTypeHolder());