Remove MVCC code from cursors and pages in PageStore

h2/src/main/org/h2/index/PageData.java

@@ -131,11 +131,9 @@ abstract class PageData extends Page {
      * @param session the session
      * @param minKey the smallest key
      * @param maxKey the largest key
-     * @param multiVersion if the delta should be used
      * @return the cursor
      */
-    abstract Cursor find(Session session, long minKey, long maxKey,
-            boolean multiVersion);
+    abstract Cursor find(Session session, long minKey, long maxKey);
 
     /**
      * Get the key at this position.

h2/src/main/org/h2/index/PageDataCursor.java

@@ -5,7 +5,6 @@
  */
 package org.h2.index;
 
-import org.h2.engine.Session;
 import org.h2.message.DbException;
 import org.h2.result.Row;
 import org.h2.result.SearchRow;
@@ -19,16 +18,11 @@ class PageDataCursor implements Cursor {
     private int idx;
     private final long maxKey;
     private Row row;
-    private final boolean multiVersion;
-    private final Session session;
 
-    PageDataCursor(Session session, PageDataLeaf current, int idx, long maxKey,
-            boolean multiVersion) {
+    PageDataCursor(PageDataLeaf current, int idx, long maxKey) {
         this.current = current;
         this.idx = idx;
         this.maxKey = maxKey;
-        this.multiVersion = multiVersion;
-        this.session = session;
     }
 
     @Override
@@ -43,18 +37,7 @@ class PageDataCursor implements Cursor {
 
     @Override
     public boolean next() {
-        if (!multiVersion) {
-            nextRow();
-            return checkMax();
-        }
-        while (true) {
-            nextRow();
-            if (row != null && row.getSessionId() != 0 &&
-                    row.getSessionId() != session.getId()) {
-                continue;
-            }
-            break;
-        }
+        nextRow();
         return checkMax();
     }
 

h2/src/main/org/h2/index/PageDataIndex.java

@@ -252,7 +252,7 @@ public class PageDataIndex extends PageIndex {
         long from = first == null ? Long.MIN_VALUE : first.getKey();
         long to = last == null ? Long.MAX_VALUE : last.getKey();
         PageData root = getPage(rootPageId, 0);
-        return root.find(session, from, to, isMultiVersion);
+        return root.find(session, from, to);
 
     }
 
@@ -262,12 +262,11 @@ public class PageDataIndex extends PageIndex {
      * @param session the session
      * @param first the key of the first row
      * @param last the key of the last row
-     * @param multiVersion if mvcc should be used
      * @return the cursor
      */
-    Cursor find(Session session, long first, long last, boolean multiVersion) {
+    Cursor find(Session session, long first, long last) {
         PageData root = getPage(rootPageId, 0);
-        return root.find(session, first, last, multiVersion);
+        return root.find(session, first, last);
     }
 
     @Override

h2/src/main/org/h2/index/PageDataLeaf.java

@@ -315,9 +315,9 @@ public class PageDataLeaf extends PageData {
     }
 
     @Override
-    Cursor find(Session session, long minKey, long maxKey, boolean multiVersion) {
+    Cursor find(Session session, long minKey, long maxKey) {
         int x = find(minKey);
-        return new PageDataCursor(session, this, x, maxKey, multiVersion);
+        return new PageDataCursor(this, x, maxKey);
     }
 
     /**

h2/src/main/org/h2/index/PageDataNode.java

@@ -160,11 +160,10 @@ public class PageDataNode extends PageData {
     }
 
     @Override
-    Cursor find(Session session, long minKey, long maxKey, boolean multiVersion) {
+    Cursor find(Session session, long minKey, long maxKey) {
         int x = find(minKey);
         int child = childPageIds[x];
-        return index.getPage(child, getPos()).find(session, minKey, maxKey,
-                multiVersion);
+        return index.getPage(child, getPos()).find(session, minKey, maxKey);
     }
 
     @Override

h2/src/main/org/h2/index/PageDelegateIndex.java

@@ -67,17 +67,17 @@ public class PageDelegateIndex extends PageIndex {
         // ifNull is MIN_VALUE as well, because the column is never NULL
         // so avoid returning all rows (returning one row is OK)
         long max = mainIndex.getKey(last, Long.MAX_VALUE, Long.MIN_VALUE);
-        return mainIndex.find(session, min, max, false);
+        return mainIndex.find(session, min, max);
     }
 
     @Override
     public Cursor findFirstOrLast(Session session, boolean first) {
         Cursor cursor;
         if (first) {
-            cursor = mainIndex.find(session, Long.MIN_VALUE, Long.MAX_VALUE, false);
+            cursor = mainIndex.find(session, Long.MIN_VALUE, Long.MAX_VALUE);
         } else  {
             long x = mainIndex.getLastKey();
-            cursor = mainIndex.find(session, x, x, false);
+            cursor = mainIndex.find(session, x, x);
         }
         cursor.next();
         return cursor;