Record the three known big issues with the current RIGHT JOIN design in

the join8 test module, with tests that deliberately fail in order to remind
us to fix the issues.

FossilOrigin-Name: 2c4ee723f4d0591d09776adfb82246bfa89153ab390b8b3f1878d1cdc43d68c8

test/join8.test

@@ -21,4 +21,61 @@ do_execsql_test join8-10 {
   CREATE INDEX t2x ON t2(x);
   SELECT avg(DISTINCT b) FROM (SELECT * FROM t2 LEFT RIGHT JOIN t1 ON c);
 } {NULL}
+
+# Pending issue #1:
+# Row-value initialization subroutines must be called from with the
+# RIGHT JOIN body subroutine before the first use of any register containing
+# the results of that subroutine.  This seems dodgy.  Test case:
+#
+# CREATE TABLE t1(a INTEGER PRIMARY KEY AUTOINCREMENT,b,c,d,e,f,g,h,j,k,l,m,n,o,p,q,r,s);
+# CREATE INDEX t1x1 ON t1(g+h,j,k);
+# CREATE INDEX t1x2 ON t1(b);
+# INSERT INTO t1 DEFAULT VALUES;
+# SELECT a FROM (SELECT a FROM (SELECT a FROM (SELECT a FROM t1 NATURAL LEFT JOIN t1 WHERE (b, 2 ) IS ( SELECT 2 IN(2,2),2)) NATURAL LEFT FULL JOIN t1 WHERE ( rowid , 1 )<=(CASE 5 WHEN 619 THEN 841 ELSE 3374391096 END,0) ORDER BY a ASC) NATURAL LEFT JOIN t1 WHERE (b, 2 ) IS ( SELECT 3 IN(3,3),3)) NATURAL LEFT FULL JOIN t1 WHERE ( rowid , 1 )<=(CASE 5 WHEN 619 THEN 841 ELSE 3374391096 END,0) ORDER BY a ASC;
+#
+do_test join8-issue-1 {set rc "Issue-1 'row-value subroutine' unresolved"} {}
+
+# Pending issue #2:
+# Jump to addrHalt inside the RIGHT JOIN body subroutine bypasses the
+# OP_Return, resulting in a subroutine loop.  Test case:
+#
+# CREATE TABLE t1(a int, b int, c int);
+# INSERT INTO t1 VALUES(1,2,3),(4,5,6);
+# CREATE TABLE t2(d int, e int);
+# INSERT INTO t2 VALUES(3,333),(4,444);
+# CREATE TABLE t3(f int, g int);
+# PRAGMA automatic_index=off;
+# .eqp trace
+# SELECT * FROM t1 RIGHT JOIN t2 ON c=d JOIN t3 ON f=e;
+#
+do_test join8-issue-2 {set rc "Issue-2 'jump to addrHalt' unresolved"} {}
+
+# Pending issue #3:
+# USING does not work with RIGHT JOIN.
+# Test case:
+#
+# CREATE TABLE t4(id INTEGER PRIMARY KEY, x TEXT);
+# CREATE TABLE t5(id INTEGER PRIMARY KEY, y TEXT);
+# CREATE TABLE t6(id INTEGER PRIMARY KEY, z INT);
+# 
+# INSERT INTO t4(id,x) VALUES(2,'alice'),(4,'bob'),(6,'cindy'),(8,'dave');
+# INSERT INTO t5(id,y) VALUES(1,'red'),(2,'orange'),(3,'yellow'),(4,'green'),
+#                            (5,'blue');
+# INSERT INTO t6(id,z) VALUES(3,333),(4,444),(5,555),(0,1000),(9,999);
+# 
+# .mode box
+# SELECT *, t4.id, t5.id, t6.id
+#   FROM t4 NATURAL LEFT JOIN t5 NATURAL LEFT JOIN t6
+#  ORDER BY coalesce(t4.id,t5.id,t6.id);
+# 
+# SELECT *, t4.id, t5.id, t6.id
+#   FROM t4 NATURAL RIGHT JOIN t5 NATURAL RIGHT JOIN t6
+#  ORDER BY coalesce(t4.id,t5.id,t6.id);
+# 
+# SELECT *, t4.id, t5.id, t6.id
+#   FROM t4 NATURAL FULL JOIN t5 NATURAL FULL JOIN t6
+#  ORDER BY coalesce(t4.id,t5.id,t6.id);
+#
+do_test join8-issue-3 {set rc "Issue-3 'USING' unresolved"} {}
+
 finish_test