From ddeeea67f3a8c0fdcec13ec7f3be8faf2169d9a9 Mon Sep 17 00:00:00 2001
From: wangpingyun <2418191738@qq.com>
Date: Tue, 12 Nov 2024 14:09:40 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8Djdbc=E4=B8=8D=E8=AF=86?=
 =?UTF-8?q?=E5=88=AB=E6=B5=AE=E7=82=B9=E6=95=B0=E7=89=B9=E6=AE=8A=E5=80=BC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/common/backend/utils/adt/float.cpp | 11 ++++++++---
 src/include/utils/builtins.h           |  1 +
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/common/backend/utils/adt/float.cpp b/src/common/backend/utils/adt/float.cpp
index 9e84c0a5a..9959d7601 100644
--- a/src/common/backend/utils/adt/float.cpp
+++ b/src/common/backend/utils/adt/float.cpp
@@ -639,7 +639,7 @@ Datum float8out(PG_FUNCTION_ARGS)
     errno_t rc = EOK;
 
     if (isnan(num)) {
-        if (u_sess->attr.attr_sql.enable_binary_special_o_format) {
+        if (u_sess->attr.attr_sql.enable_binary_special_o_format && !is_req_from_jdbc()) {
             rc = strcpy_s(ascii, MAXDOUBLEWIDTH + 1, "Nan");
         } else {
             rc = strcpy_s(ascii, MAXDOUBLEWIDTH + 1, "NaN");
@@ -649,7 +649,7 @@ Datum float8out(PG_FUNCTION_ARGS)
     }
     switch (is_infinite(num)) {
         case 1:
-            if (u_sess->attr.attr_sql.enable_binary_special_o_format) {
+            if (u_sess->attr.attr_sql.enable_binary_special_o_format && !is_req_from_jdbc()) {
                 rc = strcpy_s(ascii, MAXDOUBLEWIDTH + 1, "Inf");
             } else {
                 rc = strcpy_s(ascii, MAXDOUBLEWIDTH + 1, "Infinity");
@@ -657,7 +657,7 @@ Datum float8out(PG_FUNCTION_ARGS)
             securec_check(rc, "\0", "\0");
             break;
         case -1:
-            if (u_sess->attr.attr_sql.enable_binary_special_o_format) {
+            if (u_sess->attr.attr_sql.enable_binary_special_o_format && !is_req_from_jdbc()) {
                 rc = strcpy_s(ascii, MAXDOUBLEWIDTH + 1, "-Inf");
             } else {
                 rc = strcpy_s(ascii, MAXDOUBLEWIDTH + 1, "-Infinity");
@@ -3168,3 +3168,8 @@ Datum to_binary_float_text_number(PG_FUNCTION_ARGS)
 
     PG_RETURN_FLOAT4((float4)result);
 }
+
+bool is_req_from_jdbc()
+{
+    return strcmp(u_sess->attr.attr_common.application_name, "PostgreSQL JDBC Driver") == 0;
+}
\ No newline at end of file
diff --git a/src/include/utils/builtins.h b/src/include/utils/builtins.h
index 4807e94b8..18453bcdc 100644
--- a/src/include/utils/builtins.h
+++ b/src/include/utils/builtins.h
@@ -1905,5 +1905,6 @@ extern char *pg_ultostr_zeropad(char *str, uint32 value, int32 minwidth);
 extern char *printTypmod(const char *typname, int32 typmod, Oid typmodout);
 /* float.cpp */
 extern int float8_cmp_internal(float8 a, float8 b);
+extern bool is_req_from_jdbc();
 
 #endif /* BUILTINS_H */