Add table valued function tests

Signed-off-by: Morgan Douglas <mdouglas47@bloomberg.net>

tests/yast.test/tabfunc1.test

@@ -0,0 +1,52 @@
+# This file implements tests for table-valued-functions implemented using
+# eponymous virtual tables.
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Ticket 174827501
+do_test tabfunc01-100 {
+  db eval {
+    select *
+    from (
+      values
+      (1, '{"x":1}'),
+      (2, '{"x":1, "y": 2}')
+    )
+    left join json_each(column2, '$.y') y;
+  }
+} {1 {{"x":1}} {} {} {} {} {} {} {} {} 2 {{"x":1, "y": 2}} {} 2 integer 2 4 {} {$.y} {$.y}}
+
+# Ticket 174827501
+do_test tabfunc01-101 {
+  db eval {
+    select * from
+    generate_series(1, 2) a
+    left join generate_series(2, 3) b
+    on a.value=b.value;
+  }
+} {1 {} 2 2}
+
+# Ticket 174827501
+do_test tabfunc01-102 {
+  db eval {
+    create table a(value int);
+    insert into a(value) values(1), (2);
+    select * from a
+    left join generate_series(2, 3) b
+    on a.value=b.value;
+  }
+} {1 {} 2 2}
+
+# Ticket 174827501
+do_test tabfunc01-103 {
+  db eval {
+    create table b(value int);
+    insert into b(value) values(2), (3);
+    select * from generate_series(1, 2) a
+    left join b
+    on a.value=b.value;
+  }
+} {1 {} 2 2}
+
+finish_test