Add flag values in WAL description to all heap records

Hexadecimal is consistently used as format to not bloat too much the
output but keep it readable.  This information is useful mainly for
debugging purposes with for example pg_waldump.

Author: Michael Paquier
Reviewed-by: Nathan Bossart, Dmitry Dolgov, Andres Freund, Álvaro
Herrera
Discussion: https://postgr.es/m/20180413034734.GE1552@paquier.xyz

src/backend/access/rmgrdesc/heapdesc.c

@@ -42,22 +42,26 @@ heap_desc(StringInfo buf, XLogReaderState *record)
 	{
 		xl_heap_insert *xlrec = (xl_heap_insert *) rec;
 
-		appendStringInfo(buf, "off %u", xlrec->offnum);
+		appendStringInfo(buf, "off %u flags 0x%02X", xlrec->offnum,
+						 xlrec->flags);
 	}
 	else if (info == XLOG_HEAP_DELETE)
 	{
 		xl_heap_delete *xlrec = (xl_heap_delete *) rec;
 
-		appendStringInfo(buf, "off %u ", xlrec->offnum);
+		appendStringInfo(buf, "off %u flags 0x%02X ",
+						 xlrec->offnum,
+						 xlrec->flags);
 		out_infobits(buf, xlrec->infobits_set);
 	}
 	else if (info == XLOG_HEAP_UPDATE)
 	{
 		xl_heap_update *xlrec = (xl_heap_update *) rec;
 
-		appendStringInfo(buf, "off %u xmax %u ",
+		appendStringInfo(buf, "off %u xmax %u flags 0x%02X ",
 						 xlrec->old_offnum,
-						 xlrec->old_xmax);
+						 xlrec->old_xmax,
+						 xlrec->flags);
 		out_infobits(buf, xlrec->old_infobits_set);
 		appendStringInfo(buf, "; new off %u xmax %u",
 						 xlrec->new_offnum,
@@ -67,9 +71,10 @@ heap_desc(StringInfo buf, XLogReaderState *record)
 	{
 		xl_heap_update *xlrec = (xl_heap_update *) rec;
 
-		appendStringInfo(buf, "off %u xmax %u ",
+		appendStringInfo(buf, "off %u xmax %u flags 0x%02X ",
 						 xlrec->old_offnum,
-						 xlrec->old_xmax);
+						 xlrec->old_xmax,
+						 xlrec->flags);
 		out_infobits(buf, xlrec->old_infobits_set);
 		appendStringInfo(buf, "; new off %u xmax %u",
 						 xlrec->new_offnum,
@@ -98,7 +103,7 @@ heap_desc(StringInfo buf, XLogReaderState *record)
 	{
 		xl_heap_lock *xlrec = (xl_heap_lock *) rec;
 
-		appendStringInfo(buf, "off %u: xid %u: flags %u ",
+		appendStringInfo(buf, "off %u: xid %u: flags 0x%02X ",
 						 xlrec->offnum, xlrec->locking_xid, xlrec->flags);
 		out_infobits(buf, xlrec->infobits_set);
 	}
@@ -139,20 +144,21 @@ heap2_desc(StringInfo buf, XLogReaderState *record)
 	{
 		xl_heap_visible *xlrec = (xl_heap_visible *) rec;
 
-		appendStringInfo(buf, "cutoff xid %u flags %d",
+		appendStringInfo(buf, "cutoff xid %u flags 0x%02X",
 						 xlrec->cutoff_xid, xlrec->flags);
 	}
 	else if (info == XLOG_HEAP2_MULTI_INSERT)
 	{
 		xl_heap_multi_insert *xlrec = (xl_heap_multi_insert *) rec;
 
-		appendStringInfo(buf, "%d tuples", xlrec->ntuples);
+		appendStringInfo(buf, "%d tuples flags 0x%02X", xlrec->ntuples,
+						 xlrec->flags);
 	}
 	else if (info == XLOG_HEAP2_LOCK_UPDATED)
 	{
 		xl_heap_lock_updated *xlrec = (xl_heap_lock_updated *) rec;
 
-		appendStringInfo(buf, "off %u: xmax %u: flags %u ",
+		appendStringInfo(buf, "off %u: xmax %u: flags 0x%02X ",
 						 xlrec->offnum, xlrec->xmax, xlrec->flags);
 		out_infobits(buf, xlrec->infobits_set);
 	}