diff --git a/src/common/backend/parser/parse_expr.cpp b/src/common/backend/parser/parse_expr.cpp
index c188cbdad2121afc1e04e27b2f27d9a10c26393c..6990806b086a0e80d3d5b5f0d156d4083c94a3f3 100644
--- a/src/common/backend/parser/parse_expr.cpp
+++ b/src/common/backend/parser/parse_expr.cpp
@@ -3566,8 +3566,14 @@ static char *ColumnRefFindRelname(ParseState *pstate, const char *colname)
                     Value *col = (Value *)lfirst(lc2);
                     if (strcmp(colname, strVal(col)) == 0) {
                         if (rte->rtekind == RTE_RELATION) {
-                            relname = (rte->alias && rte->alias->aliasname) ?
-                                       rte->alias->aliasname : rte->relname;
+                            if (rte->alias && rte->alias->aliasname) {
+                                relname = rte->alias->aliasname;
+                            } else if (rte->eref && rte->eref->aliasname) {
+                                /* should use eref->aliasname for SYNONYM*/
+                                relname = rte->eref->aliasname;
+                            } else {
+                                relname = rte->relname;
+                            }
                         } else if (rte->rtekind == RTE_SUBQUERY) {
                             relname = rte->alias->aliasname;
                         } else if (rte->rtekind == RTE_CTE) {
diff --git a/src/test/regress/expected/sw_bugfix-2.out b/src/test/regress/expected/sw_bugfix-2.out
index 33c1e7d4ea2e6fe44565bb8322256d5d2cda1917..d418c28c9e2ef423c9d1135632b6f4d1f5bc20d2 100755
--- a/src/test/regress/expected/sw_bugfix-2.out
+++ b/src/test/regress/expected/sw_bugfix-2.out
@@ -2031,3 +2031,92 @@ ORDER BY I.ZB_CODE;
 DROP TABLE zb_layer;
 DROP TABLE rtms_dict;
 DROP TABLE zb_model;
+--test SYNONYM case
+ create table swtest.pf_org_rela_test
+(
+    org_parent_no varchar2(32),
+    org_no varchar2(32) not null ,
+    org_rela_type varchar2(32) not null
+);
+ INSERT INTO swtest.pf_org_rela_test (org_no,org_parent_no,org_rela_type) VALUES
+  ('201855','201844','ADMINISTRATION'),
+  ('201856','201844','ADMINISTRATION'),
+  ('119208','119200','ADMINISTRATION'),
+  ('201953','201932','ADMINISTRATION'),
+  ('201954','201932','ADMINISTRATION'),
+  ('201955','201932','ADMINISTRATION'),
+  ('201956','201932','ADMINISTRATION'),
+  ('120301','120300','ADMINISTRATION'),
+  ('201957','202573','ADMINISTRATION'),
+  ('201958','201957','ADMINISTRATION');
+ create synonym sy_pf for swtest.pf_org_rela_test;
+--normal case
+select
+    org_no
+from
+    swtest.pf_org_rela_test
+start with
+    org_no = '201957'
+    and org_rela_type = 'ADMINISTRATION'
+connect by
+    prior org_no = org_parent_no
+    and org_rela_type = 'ADMINISTRATION';
+ org_no 
+--------
+ 201957
+ 201958
+(2 rows)
+
+--SYNONYM case
+select
+    org_no
+from
+    sy_pf
+start with
+    org_no = '201957'
+    and org_rela_type = 'ADMINISTRATION'
+connect by
+    prior org_no = org_parent_no
+    and org_rela_type = 'ADMINISTRATION';
+ org_no 
+--------
+ 201957
+ 201958
+(2 rows)
+
+--SYNONYM alias
+select
+    aak.org_no
+from
+    sy_pf aak
+start with
+    org_no = '201957'
+    and org_rela_type = 'ADMINISTRATION'
+connect by
+    prior org_no = org_parent_no
+    and org_rela_type = 'ADMINISTRATION';
+ org_no 
+--------
+ 201957
+ 201958
+(2 rows)
+
+--SYNONYM case
+select
+    org_no
+from
+    sy_pf 
+start with
+    sy_pf.org_no = '201957'
+    and sy_pf.org_rela_type = 'ADMINISTRATION'
+connect by
+    prior org_no = org_parent_no
+    and sy_pf.org_rela_type = 'ADMINISTRATION';
+ org_no 
+--------
+ 201957
+ 201958
+(2 rows)
+
+drop synonym sy_pf;
+drop table pf_org_rela_test;
diff --git a/src/test/regress/sql/sw_bugfix-2.sql b/src/test/regress/sql/sw_bugfix-2.sql
index ffdde15c6535544f0e84b40ed2f0d7dcdf4d9d45..e6fe11a5244c71dac005d02537937032c31de736 100644
--- a/src/test/regress/sql/sw_bugfix-2.sql
+++ b/src/test/regress/sql/sw_bugfix-2.sql
@@ -740,3 +740,72 @@ ORDER BY I.ZB_CODE;
 DROP TABLE zb_layer;
 DROP TABLE rtms_dict;
 DROP TABLE zb_model;
+
+--test SYNONYM case
+ create table swtest.pf_org_rela_test
+(
+    org_parent_no varchar2(32),
+    org_no varchar2(32) not null ,
+    org_rela_type varchar2(32) not null
+);
+
+ INSERT INTO swtest.pf_org_rela_test (org_no,org_parent_no,org_rela_type) VALUES
+  ('201855','201844','ADMINISTRATION'),
+  ('201856','201844','ADMINISTRATION'),
+  ('119208','119200','ADMINISTRATION'),
+  ('201953','201932','ADMINISTRATION'),
+  ('201954','201932','ADMINISTRATION'),
+  ('201955','201932','ADMINISTRATION'),
+  ('201956','201932','ADMINISTRATION'),
+  ('120301','120300','ADMINISTRATION'),
+  ('201957','202573','ADMINISTRATION'),
+  ('201958','201957','ADMINISTRATION');
+
+ create synonym sy_pf for swtest.pf_org_rela_test;
+--normal case
+select
+    org_no
+from
+    swtest.pf_org_rela_test
+start with
+    org_no = '201957'
+    and org_rela_type = 'ADMINISTRATION'
+connect by
+    prior org_no = org_parent_no
+    and org_rela_type = 'ADMINISTRATION';
+--SYNONYM case
+select
+    org_no
+from
+    sy_pf
+start with
+    org_no = '201957'
+    and org_rela_type = 'ADMINISTRATION'
+connect by
+    prior org_no = org_parent_no
+    and org_rela_type = 'ADMINISTRATION';
+--SYNONYM alias
+select
+    aak.org_no
+from
+    sy_pf aak
+start with
+    org_no = '201957'
+    and org_rela_type = 'ADMINISTRATION'
+connect by
+    prior org_no = org_parent_no
+    and org_rela_type = 'ADMINISTRATION';
+--SYNONYM case
+select
+    org_no
+from
+    sy_pf 
+start with
+    sy_pf.org_no = '201957'
+    and sy_pf.org_rela_type = 'ADMINISTRATION'
+connect by
+    prior org_no = org_parent_no
+    and sy_pf.org_rela_type = 'ADMINISTRATION';
+
+drop synonym sy_pf;
+drop table pf_org_rela_test;
\ No newline at end of file