Further to [46639f682975dac6], the parameters of a table valued function that

is on the left side of a RIGHT JOIN do not need to be in the ON clause.  Add
new test cases and tags to associated test cases with the code.

FossilOrigin-Name: 18ee689de3d1ae43b05ca52e0b62c49442ebf68a88814a7c679e8856250a4b0d

test/join.test

@@ -1038,18 +1038,56 @@ do_execsql_test join-22.10 {
 } {11}
 
 # 2019-12-22 ticket 7929c1efb2d67e98
+# Verification of testtag-20230227a
+#
+# 2023-02-27 https://sqlite.org/forum/forumpost/422e635f3beafbf6
+# Verification of testtag-20230227a, testtag-20230227b, and testtag-20230227c
 #
 reset_db
 ifcapable vtab {
-do_execsql_test join-23.10 {
-  CREATE TABLE t0(c0);
-  INSERT INTO t0(c0) VALUES(123);
-  CREATE VIEW v0(c0) AS SELECT 0 GROUP BY 1;
-  SELECT t0.c0, v0.c0, vt0.name
-   FROM v0, t0 LEFT JOIN pragma_table_info('t0') AS vt0
-     ON vt0.name LIKE 'c0'
-   WHERE v0.c0 == 0;
-} {123 0 c0}
+  do_execsql_test join-23.10 {
+    CREATE TABLE t0(c0);
+    INSERT INTO t0(c0) VALUES(123);
+    CREATE VIEW v0(c0) AS SELECT 0 GROUP BY 1;
+    SELECT t0.c0, v0.c0, vt0.name
+     FROM v0, t0 LEFT JOIN pragma_table_info('t0') AS vt0
+       ON vt0.name LIKE 'c0'
+     WHERE v0.c0 == 0;
+  } {123 0 c0}
+  do_execsql_test join-23.20 {
+    CREATE TABLE a(value TEXT);
+    INSERT INTO a(value) SELECT value FROM json_each('["a", "b", null]');
+    CREATE TABLE b(value TEXT);
+    INSERT INTO b(value) SELECT value FROM json_each('["a", "c", null]');
+    SELECT a.value, b.value FROM a RIGHT JOIN b ON a.value = b.value;
+  } {a a {} c {} {}}
+  do_execsql_test join-23.21 {
+    SELECT a.value, b.value FROM b LEFT JOIN a ON a.value = b.value;
+  } {a a {} c {} {}}
+  do_execsql_test join-23.22 {
+    SELECT a.value, b.value 
+      FROM json_each('["a", "c", null]') AS b
+           LEFT JOIN
+           json_each('["a", "b", null]') AS a ON a.value = b.value;
+  } {a a {} c {} {}}
+  do_execsql_test join-23.23 {
+    SELECT a.value, b.value 
+      FROM json_each('["a", "b", null]') AS a
+           RIGHT JOIN
+           json_each('["a", "c", null]') AS b ON a.value = b.value;
+  } {a a {} c {} {}}
+  do_execsql_test join-23.24 {
+    SELECT a.value, b.value 
+      FROM json_each('["a", "b", null]') AS a
+           RIGHT JOIN
+           b ON a.value = b.value;
+  } {a a {} c {} {}}
+  do_execsql_test join-23.25 {
+    SELECT a.value, b.value 
+      FROM a
+           RIGHT JOIN
+           json_each('["a", "c", null]') AS b ON a.value = b.value;
+  } {a a {} c {} {}}
 }
 
 #-------------------------------------------------------------------------

test/join8.test

@@ -159,6 +159,7 @@ do_catchsql_test join8-5000 {
 } {0 {- -}}
 
 # 2022-04-29 dbsqlfuzz 19f1102a70cf966ab249de56d944fc20dbebcfcf
+# Verification of testtag-20230227b and testtag-20230227c
 #
 reset_db
 do_execsql_test join8-6000 {
@@ -181,6 +182,16 @@ do_execsql_test join8-6020 {
   SELECT value, t1.* FROM json_each('17') NATURAL RIGHT JOIN t1
    WHERE (a,b) IN (SELECT rowid, b FROM t1);
 } {17 1 2}
+do_execsql_test join8-6021 {
+  SELECT value, t1.* FROM json_each('null') NATURAL RIGHT JOIN t1
+   WHERE (a,b) IN (SELECT rowid, b FROM t1);
+} {{} 1 2}
+do_execsql_test join8-6022 {
+  CREATE TABLE a(key TEXT);
+  INSERT INTO a(key) VALUES('a'),('b');
+  SELECT quote(a.key), b.value
+    FROM a RIGHT JOIN json_each('["a","c"]') AS b ON a.key=b.value;
+} {'a' a NULL c}
 
 # Bloom filter usage by RIGHT and FULL JOIN
 #

test/tabfunc01.test

@@ -270,6 +270,7 @@ do_test tabfunc01-750 {
 } {5.0 x5 | 7.0 x7 | 13.0 x13 | 17.0 x17 | 23.0 x23 |}
 
 # ticket https://www.sqlite.org/src/info/2ae0c599b735d59e
+# Verification of testtag-20230227a
 do_test tabfunc01-751 {
   db eval {
     SELECT aa.value, bb.value, '|'