bk commit into 5.1 tree (jonas:1.2532) BUG#34033

[jonas]

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ChangeSet@stripped, 2008-01-24 14:21:52+01:00, jonas@stripped +1 -0
  ndb - bug#34033
    remove LCP-snapshot from MM-tables,
    removing possibility of spurious 899 on MM-tables

  storage/ndb/src/kernel/blocks/dbtup/DbtupScan.cpp@stripped, 2008-01-24 14:21:50+01:00, jonas@stripped +61 -54
    dont run LCP-snapshot on pure MM-tables,
    this is implemented by not setting frag.m_lcp_scan_op
    which will make TUP_COMMIT do nothing

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	jonas
# Host:	perch.ndb.mysql.com
# Root:	/home/jonas/src/51-telco-gca

--- 1.25/storage/ndb/src/kernel/blocks/dbtup/DbtupScan.cpp	2008-01-24 14:21:56 +01:00
+++ 1.26/storage/ndb/src/kernel/blocks/dbtup/DbtupScan.cpp	2008-01-24 14:21:56 +01:00
@@ -53,7 +53,14 @@
     // flags
     Uint32 bits = 0;
     
-    if (!AccScanReq::getLcpScanFlag(req->requestInfo))
+
+    if (AccScanReq::getLcpScanFlag(req->requestInfo))
+    {
+      jam();
+      bits |= ScanOp::SCAN_LCP;
+      c_scanOpPool.getPtr(scanPtr, c_lcp_scan_op);
+    }
+    else
     {
       // seize from pool and link to per-fragment list
       LocalDLList<ScanOp> list(c_scanOpPool, frag.m_scanList);
@@ -61,39 +68,35 @@
 	jam();
 	break;
       }
-
-      if (!AccScanReq::getNoDiskScanFlag(req->requestInfo)
-	  && tablePtr.p->m_no_of_disk_attributes)
-      {
-	bits |= ScanOp::SCAN_DD;
-      }
-      
-      bool mm = (bits & ScanOp::SCAN_DD);
-      if (tablePtr.p->m_attributes[mm].m_no_of_varsize > 0) {
-	bits |= ScanOp::SCAN_VS;
-	
-	// disk pages have fixed page format
-	ndbrequire(! (bits & ScanOp::SCAN_DD));
-      }
-      if (! AccScanReq::getReadCommittedFlag(req->requestInfo)) {
-	if (AccScanReq::getLockMode(req->requestInfo) == 0)
-	  bits |= ScanOp::SCAN_LOCK_SH;
-	else
-	  bits |= ScanOp::SCAN_LOCK_EX;
-      }
-    } else {
-      jam();
-      // LCP scan and disk
+    }
+     
+    if (!AccScanReq::getNoDiskScanFlag(req->requestInfo)
+        && tablePtr.p->m_no_of_disk_attributes)
+    {
+      bits |= ScanOp::SCAN_DD;
+    }
+    
+    bool mm = (bits & ScanOp::SCAN_DD);
+    if (tablePtr.p->m_attributes[mm].m_no_of_varsize > 0) {
+      bits |= ScanOp::SCAN_VS;
       
-      ndbrequire(frag.m_lcp_scan_op == c_lcp_scan_op);
-      c_scanOpPool.getPtr(scanPtr, frag.m_lcp_scan_op);
-      ndbrequire(scanPtr.p->m_fragPtrI == fragPtr.i);
-      bits |= ScanOp::SCAN_LCP;
-      if (tablePtr.p->m_attributes[MM].m_no_of_varsize > 0) {
-        bits |= ScanOp::SCAN_VS;
-      }
+      // disk pages have fixed page format
+      ndbrequire(! (bits & ScanOp::SCAN_DD));
+    }
+    if (! AccScanReq::getReadCommittedFlag(req->requestInfo)) {
+      if (AccScanReq::getLockMode(req->requestInfo) == 0)
+        bits |= ScanOp::SCAN_LOCK_SH;
+      else
+        bits |= ScanOp::SCAN_LOCK_EX;
     }
 
+    if (AccScanReq::getLcpScanFlag(req->requestInfo))
+    {
+      jam();
+      ndbrequire((bits & ScanOp::SCAN_DD) == 0);
+      ndbrequire((bits & ScanOp::SCAN_LOCK) == 0);
+    }
+    
     bits |= AccScanReq::getNRScanFlag(req->requestInfo) ? ScanOp::SCAN_NR : 0;
     
     // set up scan op
@@ -1107,16 +1110,17 @@
   fragPtr.i = scanPtr.p->m_fragPtrI;
   ptrCheckGuard(fragPtr, cnoOfFragrec, fragrecord);
 
-  if(! (scanPtr.p->m_bits & ScanOp::SCAN_LCP))
+  if(scanPtr.p->m_bits & ScanOp::SCAN_LCP)
   {
-    LocalDLList<ScanOp> list(c_scanOpPool, fragPtr.p->m_scanList);    
-    list.release(scanPtr);
+    jam();
+    fragPtr.p->m_lcp_scan_op = RNIL;
+    scanPtr.p->m_fragPtrI = RNIL;
   }
   else
   {
-    ndbrequire(fragPtr.p->m_lcp_scan_op == scanPtr.i);
-    fragPtr.p->m_lcp_scan_op = RNIL;
-    scanPtr.p->m_fragPtrI = RNIL;
+    jam();
+    LocalDLList<ScanOp> list(c_scanOpPool, fragPtr.p->m_scanList);    
+    list.release(scanPtr);
   }
 }
 
@@ -1129,21 +1133,24 @@
   tablePtr.i = req->tableId;
   ptrCheckGuard(tablePtr, cnoOfTablerec, tablerec);
 
-  jam();
-  FragrecordPtr fragPtr;
-  Uint32 fragId = req->fragmentId;
-  fragPtr.i = RNIL;
-  getFragmentrec(fragPtr, fragId, tablePtr.p);
-  ndbrequire(fragPtr.i != RNIL);
-  Fragrecord& frag = *fragPtr.p;
-  
-  ndbrequire(frag.m_lcp_scan_op == RNIL && c_lcp_scan_op != RNIL);
-  frag.m_lcp_scan_op = c_lcp_scan_op;
-  ScanOpPtr scanPtr;
-  c_scanOpPool.getPtr(scanPtr, frag.m_lcp_scan_op);
-  ndbrequire(scanPtr.p->m_fragPtrI == RNIL);
-  scanPtr.p->m_fragPtrI = fragPtr.i;
-  
-  scanFirst(signal, scanPtr);
-  scanPtr.p->m_state = ScanOp::First;
+  if (tablePtr.p->m_no_of_disk_attributes)
+  {
+    jam();
+    FragrecordPtr fragPtr;
+    Uint32 fragId = req->fragmentId;
+    fragPtr.i = RNIL;
+    getFragmentrec(fragPtr, fragId, tablePtr.p);
+    ndbrequire(fragPtr.i != RNIL);
+    Fragrecord& frag = *fragPtr.p;
+    
+    ndbrequire(frag.m_lcp_scan_op == RNIL && c_lcp_scan_op != RNIL);
+    frag.m_lcp_scan_op = c_lcp_scan_op;
+    ScanOpPtr scanPtr;
+    c_scanOpPool.getPtr(scanPtr, frag.m_lcp_scan_op);
+    ndbrequire(scanPtr.p->m_fragPtrI == RNIL);
+    scanPtr.p->m_fragPtrI = fragPtr.i;
+    
+    scanFirst(signal, scanPtr);
+    scanPtr.p->m_state = ScanOp::First;
+  }
 }