绕过printtup的dataoutput的functioncall

src/common/backend/utils/adt/date.cpp

@@ -212,6 +212,28 @@ Datum date_out(PG_FUNCTION_ARGS)
     PG_RETURN_CSTRING(result);
 }
 
+char* output_date_out(DateADT date)
+{
+    char* result = NULL;
+    struct pg_tm tt, *tm = &tt;
+
+    u_sess->utils_cxt.dateoutput_buffer[0] = '\0';
+
+    if (DATE_NOT_FINITE(date))
+        EncodeSpecialDate(date, u_sess->utils_cxt.dateoutput_buffer, MAXDATELEN + 1);
+    else {
+        if (unlikely(date > 0 && (INT_MAX - date < POSTGRES_EPOCH_JDATE))) {
+            ereport(ERROR,
+                (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+                    errmsg("input julian date is overflow")));
+        }
+        j2date(date + POSTGRES_EPOCH_JDATE, &(tm->tm_year), &(tm->tm_mon), &(tm->tm_mday));
+        EncodeDateOnly(tm, u_sess->time_cxt.DateStyle, u_sess->utils_cxt.dateoutput_buffer);
+    }
+
+    return u_sess->utils_cxt.dateoutput_buffer;
+}
+
 /*
  *		date_recv			- converts external binary format to date
  */

src/gausskernel/process/threadpool/knl_session.cpp

@@ -471,6 +471,7 @@ static void knl_u_utils_init(knl_u_utils_context* utils_cxt)
     utils_cxt->int16output_buffer = (char*)palloc0(128);
     utils_cxt->varcharoutput_buffer = (char*)palloc0(256);
     utils_cxt->numericoutput_buffer = (char*)palloc0(64);
+    utils_cxt->dateoutput_buffer = (char*)palloc0(MAXDATELEN + 1);
 
     (void)syscalllockInit(&utils_cxt->deleMemContextMutex);
 }

src/gausskernel/storage/access/common/printtup.cpp

@@ -36,6 +36,7 @@
 #include "executor/exec/execStream.h"
 #include "access/heapam.h"
 #include "utils/memutils.h"
+#include "catalog/pg_proc.h"
 
 static void printtup_startup(DestReceiver *self, int operation, TupleDesc typeinfo);
 static void printtup_20(TupleTableSlot *slot, DestReceiver *self);
@@ -1119,6 +1120,9 @@ void printtup(TupleTableSlot *slot, DestReceiver *self)
                     case F_NUMERIC_OUT:
                         outputstr = output_numeric_out(DatumGetNumeric(attr));
                         break;
+                    case F_DATE_OUT:
+                        outputstr = output_date_out(DatumGetDateADT(attr));
+                        break;
                     default:
                         outputstr = OutputFunctionCall(&thisState->finfo, attr);
                         break;

src/include/knl/knl_session.h

@@ -650,6 +650,7 @@ typedef struct knl_u_utils_context {
     char* int16output_buffer;
     char* varcharoutput_buffer;
     char* numericoutput_buffer;
+    char* dateoutput_buffer;
 
     syscalllock deleMemContextMutex;
 } knl_u_utils_context;

src/include/utils/builtins.h

@@ -24,6 +24,7 @@
 #include "lib/stringinfo.h"
 #endif
 #include "utils/sortsupport.h"
+#include "utils/date.h"
 
 /*
  *		Defined in adt/
@@ -907,6 +908,7 @@ extern char* output_text_to_cstring(const text* t);
 extern char* output_int32_to_cstring(int32 value);
 extern char* output_int64_to_cstring(int64 value);
 extern char* output_int128_to_cstring(int128 value);
+extern char* output_date_out(DateADT date);
 extern void text_to_cstring_buffer(const text* src, char* dst, size_t dst_len);
 extern int text_instr_3args(text* textStr, text* textStrToSearch, int32 beginIndex);
 extern int text_instr_4args(text* textStr, text* textStrToSearch, int32 beginIndex, int occurTimes);