use sendQuery if no return is expected

src/test/resources/sql/function/Test/function_void.sql

@@ -0,0 +1,8 @@
+CREATE OR REPLACE FUNCTION function_void (name text default 'plop') returns void
+LANGUAGE plpgsql
+AS
+$$
+BEGIN
+    PERFORM 1;
+END;
+$$;

src/test/resources/sql/query/Test/exec.sql

@@ -0,0 +1 @@
+delete FROM test where 2038538 = 2;