diff --git a/src/common/backend/utils/adt/formatting.cpp b/src/common/backend/utils/adt/formatting.cpp
index 422df1f4bb84c807eb4baf06aa39a24c6ddfb7dd..0f1cb57f3bdf5a4fbb24efb63369fa15633fef4c 100644
--- a/src/common/backend/utils/adt/formatting.cpp
+++ b/src/common/backend/utils/adt/formatting.cpp
@@ -7095,6 +7095,7 @@ Datum numeric_to_text_number(PG_FUNCTION_ARGS)
                     // Number description: fmt
                     NUMDesc numDesc;
                     bool shouldFree = false;
+                    fmt = PG_GETARG_TEXT_P(4);
                     int len = VARSIZE(fmt) - VARHDRSZ;
                     FormatNode* format = NUM_cache(len, &numDesc, fmt, &shouldFree);
                     // Integer digits
@@ -7177,6 +7178,7 @@ Datum numeric_to_default_without_defaultval(PG_FUNCTION_ARGS)
                     result = to_numeric_number_internal_without_fmt(default_num_val,
 						PG_GET_COLLATION(), &resultNull);
                 } else {
+                    fmt = PG_GETARG_TEXT_P(4);
                     result = to_numeric_to_number_internal(default_num_val, fmt,
 						PG_GET_COLLATION(), &resultNull);
                 }
diff --git a/src/test/regress/expected/to_number_default.out b/src/test/regress/expected/to_number_default.out
index 0fc7b2da0826a422d3eda06b7e0e6c226805cdd6..b6f44aef78c20e0b1ef0dc16e9e7a141a8f9b63d 100644
--- a/src/test/regress/expected/to_number_default.out
+++ b/src/test/regress/expected/to_number_default.out
@@ -280,6 +280,12 @@ SELECT TO_NUMBER(3.14 DEFAULT c1 ON CONVERSION ERROR) FROM tonumber ORDER By c1;
       3.14
 (7 rows)
 
+SELECT to_number('<1234>' DEFAULT 999 ON CONVERSION ERROR,'PR9999999');
+ERROR:  "9" must be ahead of "PR"
+CONTEXT:  referenced column: to_number
+SELECT  TO_NUMBER('1234.56' default 999 on conversion error ,'99.99');
+ERROR:  Exceeding the maximum value required by fmt
+CONTEXT:  referenced column: to_number
 SELECT TO_NUMBER(c2 DEFAULT 3.14 ON CONVERSION ERROR) FROM tonumber ORDER By c1;
                 to_number                
 -----------------------------------------
diff --git a/src/test/regress/sql/to_number_default.sql b/src/test/regress/sql/to_number_default.sql
index 15516dbf67d2dbfe50dca1cf33209e2ab72c182f..a78770a1305969678c98da6dfe26c2b805d0d1a0 100644
--- a/src/test/regress/sql/to_number_default.sql
+++ b/src/test/regress/sql/to_number_default.sql
@@ -60,6 +60,8 @@ SELECT TO_NUMBER(c1 DEFAULT NULL ON CONVERSION ERROR) FROM tonumber ORDER By c1;
 
 SELECT TO_NUMBER('abd' DEFAULT c1 ON CONVERSION ERROR) FROM tonumber ORDER By c1;  -- error， Default param can't be ColumnRef
 SELECT TO_NUMBER(3.14 DEFAULT c1 ON CONVERSION ERROR) FROM tonumber ORDER By c1;  -- error， Default param can't be ColumnRef
+SELECT to_number('<1234>' DEFAULT 999 ON CONVERSION ERROR,'PR9999999');
+SELECT  TO_NUMBER('1234.56' default 999 on conversion error ,'99.99');
 
 SELECT TO_NUMBER(c2 DEFAULT 3.14 ON CONVERSION ERROR) FROM tonumber ORDER By c1;
 SELECT TO_NUMBER(c2 DEFAULT '3.14' ON CONVERSION ERROR) FROM tonumber ORDER By c1;
@@ -278,9 +280,10 @@ EXECUTE default_param_num_text(27, 6.666666, '1.79769313486231E+100');
 EXECUTE default_param_num_text(28, 1.79769313486231E+400, '6.666666');
 EXECUTE default_param_num_text(29, 6.666666, '1.79769313486231E+400');
 
+
 SELECT * FROM tonumber_exec ORDER BY c1;
 
 DROP TABLE tonumber;
 DROP TABLE tonumber_exec;
 
-drop schema if exists func_to_number cascade;
\ No newline at end of file
+drop schema if exists func_to_number cascade;