diff --git a/src/common/backend/catalog/gs_package.cpp b/src/common/backend/catalog/gs_package.cpp
index 8c95721d2..0b52d8352 100755
--- a/src/common/backend/catalog/gs_package.cpp
+++ b/src/common/backend/catalog/gs_package.cpp
@@ -1831,6 +1831,7 @@ bool isSameArgList(CreateFunctionStmt* stmt1, CreateFunctionStmt* stmt2)
     int inLoc1 = 0;
     int inLoc2 = 0;
     int length = 0;
+    int sameParamtypNum = 0;
     foreach(cell, argList1) {
         arr1[length] = (FunctionParameter*)lfirst(cell);
         if (arr1[length]->mode != FUNC_PARAM_OUT) {
@@ -1956,7 +1957,21 @@ bool isSameArgList(CreateFunctionStmt* stmt1, CreateFunctionStmt* stmt2)
                 pfree(arr2);
                 return false;
             }
-        } else if (toid1 != toid2 || fp1->mode != fp2->mode) {
+        }
+        if (toid1 != toid2) {
+            pfree(arr1);
+            pfree(arr2);
+            return false;
+        }
+        if ((stmt1->isProcedure || stmt2->isProcedure) && (fp1->mode != fp2->mode)) {
+            if (enable_outparam_override && length1 == length2) {
+                sameParamtypNum += 1;
+            } else {
+                pfree(arr1);
+                pfree(arr2);
+                return false;
+            }
+        } else if (stmt1->isFunctionDeclare != stmt2->isFunctionDeclare && fp1->mode != fp2->mode) {
             pfree(arr1);
             pfree(arr2);
             return false;
@@ -1978,6 +1993,16 @@ bool isSameArgList(CreateFunctionStmt* stmt1, CreateFunctionStmt* stmt2)
     }
     pfree(arr1);
     pfree(arr2);
+
+    if (enable_outparam_override && length1 == length2 && sameParamtypNum == length1  && sameParamtypNum != 0) {
+        ereport(ERROR,
+            (errcode(ERRCODE_UNDEFINED_FUNCTION),
+                errmodule(MOD_PLSQL),
+                    errmsg("can not override param:%s", NameListToString(stmt1->funcname)),
+                    errcause("param's length is unequal."),
+                    erraction("please check the param's length.")));
+    }
+
     /* function delcare in package specification and define in package body must be same */
     if (!isSameName && (stmt1->isFunctionDeclare^stmt2->isFunctionDeclare)) {
         ereport(ERROR,
diff --git a/src/test/regress/expected/plpgsql_override_out.out b/src/test/regress/expected/plpgsql_override_out.out
index 754b0c0a4..75fed7551 100644
--- a/src/test/regress/expected/plpgsql_override_out.out
+++ b/src/test/regress/expected/plpgsql_override_out.out
@@ -953,6 +953,27 @@ call test_function2('','');
  <unnamed portal 2> | <unnamed portal 1> | <unnamed portal 2>
 (1 row)
 
+set behavior_compat_options = 'proc_outparam_override';
+create or replace package pck2 is
+    FUNCTION pkg_mem_case(a int,self1 int) RETURN VARCHAR2;
+    procedure pkg_mem_case(a int,self1 inout int);
+end pck2;
+/
+ERROR:  function declared in package specification and package body must be the same, function: pkg_mem_case
+set behavior_compat_options = '';
+create or replace package pck2 is
+    FUNCTION pkg_mem_case(a int,self1 int) RETURN VARCHAR2;
+    procedure pkg_mem_case(a int,self1 inout int);
+end pck2;
+/
+select count(*) from pg_proc where proname = 'pkg_mem_case';
+ count 
+-------
+     1
+(1 row)
+
+drop package pck2;
+NOTICE:  drop cascades to function plpgsql_override_out.pkg_mem_case(integer,integer)
 set plsql_compile_check_options='';
 drop package body if exists pck1;
 drop package body pck1;
@@ -979,7 +1000,7 @@ drop cascades to function f1(integer)
 drop cascades to function f3()
 drop cascades to function pro2()
 drop cascades to function plpgsql_override_out.p11()
-drop cascades to function p11()
+--?.*
 drop cascades to function plpgsql_override_out.p11()
 drop cascades to function p11(integer)
 drop cascades to table test_table2
diff --git a/src/test/regress/sql/plpgsql_override_out.sql b/src/test/regress/sql/plpgsql_override_out.sql
index 04d87cbc9..73460b513 100644
--- a/src/test/regress/sql/plpgsql_override_out.sql
+++ b/src/test/regress/sql/plpgsql_override_out.sql
@@ -710,6 +710,22 @@ $$
 LANGUAGE 'plpgsql';
 call test_function2('','');
 
+set behavior_compat_options = 'proc_outparam_override';
+create or replace package pck2 is
+    FUNCTION pkg_mem_case(a int,self1 int) RETURN VARCHAR2;
+    procedure pkg_mem_case(a int,self1 inout int);
+end pck2;
+/
+
+set behavior_compat_options = '';
+create or replace package pck2 is
+    FUNCTION pkg_mem_case(a int,self1 int) RETURN VARCHAR2;
+    procedure pkg_mem_case(a int,self1 inout int);
+end pck2;
+/
+select count(*) from pg_proc where proname = 'pkg_mem_case';
+drop package pck2;
+
 set plsql_compile_check_options='';
 drop package body if exists pck1;
 drop package body pck1;