1. Remove unused startSequence argument from DPM_scan_pages().

2. Remove RDB$PAGE_SEQUENCE field from index on RDB$PAGES because DPM_scan_pages() doesn't use the field anymore.

src/jrd/dpm.epp

@@ -2014,7 +2014,7 @@ SLONG DPM_prefetch_bitmap(thread_db* tdbb, jrd_rel* relation, PageBitmap* bitmap
 #endif
 
 
-void DPM_scan_pages(thread_db* tdbb, SCHAR pagType /*= 0*/, int relId /*= 0*/, ULONG startSequence /*= 0*/)
+void DPM_scan_pages(thread_db* tdbb, SCHAR pagType /*= 0*/, int relId /*= 0*/)
 {
 /**************************************
  *
@@ -2115,7 +2115,6 @@ void DPM_scan_pages(thread_db* tdbb, SCHAR pagType /*= 0*/, int relId /*= 0*/, U
 		FOR(REQUEST_HANDLE request) X IN RDB$PAGES
 			WITH X.RDB$RELATION_ID = relId
 			AND X.RDB$PAGE_TYPE = pagType
-			AND X.RDB$PAGE_SEQUENCE >= startSequence
 		{
 			relation = MET_relation(tdbb, X.RDB$RELATION_ID);
 			relPages = relation->getBasePages();
@@ -2142,12 +2141,6 @@ void DPM_scan_pages(thread_db* tdbb, SCHAR pagType /*= 0*/, int relId /*= 0*/, U
 				CORRUPT(257);		// msg 257 bad record in RDB$PAGES
 			}
 
-			if ((sequence == startSequence) && (vector = *address))
-			{
-				fb_assert(vector->count() > sequence);
-				fb_assert((*vector)[sequence] == X.RDB$PAGE_NUMBER);
-			}
-
 			vector = *address = vcl::newVector(*dbb->dbb_permanent, *address, sequence + 1);
 			(*vector)[sequence] = X.RDB$PAGE_NUMBER;
 		}

src/jrd/dpm_proto.h

@@ -73,7 +73,7 @@ void	DPM_pages(Jrd::thread_db*, SSHORT, int, ULONG, ULONG);
 #ifdef SUPERSERVER_V2
 SLONG	DPM_prefetch_bitmap(Jrd::thread_db*, Jrd::jrd_rel*, Jrd::PageBitmap*, SLONG);
 #endif
-void	DPM_scan_pages(Jrd::thread_db*, SCHAR pagType = 0, int relId = 0, ULONG startSequence = 0);
+void	DPM_scan_pages(Jrd::thread_db*, SCHAR pagType = 0, int relId = 0);
 void	DPM_store(Jrd::thread_db*, Jrd::record_param*, Jrd::PageStack&, const Jrd::RecordStorageType type);
 RecordNumber DPM_store_blob(Jrd::thread_db*, Jrd::blb*, Jrd::Record*);
 void	DPM_rewrite_header(Jrd::thread_db*, Jrd::record_param*);

src/jrd/idx.h

@@ -308,11 +308,10 @@ static const struct ini_idx_t indices[] =
 	INDEX(57, rel_tablespaces, idx_unique, 1)
 		SEGMENT(f_ts_name, idx_metadata)		// tablespace name
 	}},
-	//	define index RDB$INDEX_58 for RDB$PAGES RDB$PAGE_TYPE, RDB$RELATION_ID, RDB$PAGE_SEQUENCE;
-	INDEX(58, rel_pages, 0, 3)
+	//	define index RDB$INDEX_58 for RDB$PAGES RDB$PAGE_TYPE, RDB$RELATION_ID;
+	INDEX(58, rel_pages, 0, 2)
 		SEGMENT(f_pag_type, idx_numeric),	// page type
 		SEGMENT(f_pag_id, idx_numeric),		// relation id
-		SEGMENT(f_pag_seq, idx_numeric)		// page sequence
 	}}
 };