Fix cte with subquery failed.

src/gausskernel/optimizer/plan/subselect.cpp

@@ -1904,9 +1904,9 @@ void SS_process_ctes(PlannerInfo* root)
         Query* subquery = NULL;
 
         /*
-         * Ignore SELECT CTEs that are not actually referenced anywhere.
+         * Ignore SELECT CTEs that are not actually referenced anywhere or already inlined.
          */
-        if (cte->cterefcount == 0 && cmdType == CMD_SELECT) {
+        if ((cte->cterefcount == 0 && cmdType == CMD_SELECT) || cte->cterefcount == -1) {
             /* Make a dummy entry in cte_plan_ids */
             root->cte_plan_ids = lappend_int(root->cte_plan_ids, -1);
             continue;

src/test/regress/expected/fulljoin_rewrite.out

@@ -25,6 +25,77 @@ WHERE
 ------
 (0 rows)
 
+with alias11 as(select 1 alias1 from fulljoin_test),
+alias25 as(select * from (with alias19 as (select rownum from fulljoin_test2)select * from alias19)alias18)
+select * from alias11,alias25 full join fulljoin_test3 on 1=1 full join fulljoin_test4 on 1=1 where 1=1;
+ alias1 | rownum | d_id | w_id | w_ytd 
+--------+--------+------+------+-------
+(0 rows)
+
+explain (costs off) with alias11 as(select 1 alias1 from fulljoin_test),
+alias25 as(select * from (with alias19 as (select rownum from fulljoin_test2)select * from alias19)alias18)
+select * from alias11,alias25 full join fulljoin_test3 on 1=1 full join fulljoin_test4 on 1=1 where 1=1;
+                                      QUERY PLAN                                      
+--------------------------------------------------------------------------------------
+ Nested Loop
+   CTE alias25
+     ->  CTE Scan on alias19
+           CTE alias19
+             ->  Seq Scan on fulljoin_test2
+   ->  Result
+         ->  Append
+               ->  Nested Loop Left Join
+                     CTE alias25
+                       ->  CTE Scan on alias19
+                             CTE alias19
+                               ->  Seq Scan on fulljoin_test2
+                     ->  Result
+                           ->  Append
+                                 ->  Nested Loop Left Join
+                                       CTE alias25
+                                         ->  CTE Scan on alias19
+                                               CTE alias19
+                                                 ->  Seq Scan on fulljoin_test2
+                                       ->  CTE Scan on alias25
+                                       ->  Materialize
+                                             ->  Seq Scan on fulljoin_test3
+                                 ->  Nested Loop Left Anti Full Join
+                                       CTE alias25
+                                         ->  CTE Scan on alias19
+                                               CTE alias19
+                                                 ->  Seq Scan on fulljoin_test2
+                                       ->  Seq Scan on fulljoin_test3
+                                       ->  CTE Scan on alias25
+                     ->  Materialize
+                           ->  Seq Scan on fulljoin_test4
+               ->  Nested Loop Left Anti Full Join
+                     CTE alias25
+                       ->  CTE Scan on alias19
+                             CTE alias19
+                               ->  Seq Scan on fulljoin_test2
+                     ->  Seq Scan on fulljoin_test4
+                     ->  Materialize
+                           ->  Result
+                                 ->  Append
+                                       ->  Nested Loop Left Join
+                                             CTE alias25
+                                               ->  CTE Scan on alias19
+                                                     CTE alias19
+                                                       ->  Seq Scan on fulljoin_test2
+                                             ->  CTE Scan on alias25
+                                             ->  Materialize
+                                                   ->  Seq Scan on fulljoin_test3
+                                       ->  Nested Loop Left Anti Full Join
+                                             CTE alias25
+                                               ->  CTE Scan on alias19
+                                                     CTE alias19
+                                                       ->  Seq Scan on fulljoin_test2
+                                             ->  Seq Scan on fulljoin_test3
+                                             ->  CTE Scan on alias25
+   ->  Materialize
+         ->  Seq Scan on fulljoin_test
+(57 rows)
+
 drop table fulljoin_test;
 drop table fulljoin_test2;
 drop table fulljoin_test3;

src/test/regress/parallel_schedule0

@@ -1004,7 +1004,7 @@ test: cost_model
 test: base_update
 test: seqscan_fusion
 
-test: union_null_01
+test: union_null_01 fulljoin_rewrite
 
 # var selectivity
 test: var_eq_const_selectivity
@@ -1022,7 +1022,6 @@ test: rename_table
 
 # debug instrument
 test: test_debug5
-test: fulljoin_rewrite
 
 # fix echo infos
 test: gstrace_options

src/test/regress/sql/fulljoin_rewrite.sql

@@ -26,6 +26,14 @@ WHERE
     alias9.alias8 = 2
     OR alias9.alias7 = 2;
 
+with alias11 as(select 1 alias1 from fulljoin_test),
+alias25 as(select * from (with alias19 as (select rownum from fulljoin_test2)select * from alias19)alias18)
+select * from alias11,alias25 full join fulljoin_test3 on 1=1 full join fulljoin_test4 on 1=1 where 1=1;
+
+explain (costs off) with alias11 as(select 1 alias1 from fulljoin_test),
+alias25 as(select * from (with alias19 as (select rownum from fulljoin_test2)select * from alias19)alias18)
+select * from alias11,alias25 full join fulljoin_test3 on 1=1 full join fulljoin_test4 on 1=1 where 1=1;
+
 drop table fulljoin_test;
 
 drop table fulljoin_test2;