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diff --git a/bundles/org.simantics.db.procore/src/org/simantics/db/procore/cluster/OperationTable.java b/bundles/org.simantics.db.procore/src/org/simantics/db/procore/cluster/OperationTable.java
new file mode 100644
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+++ b/bundles/org.simantics.db.procore/src/org/simantics/db/procore/cluster/OperationTable.java
@@ -0,0 +1,69 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.procore.cluster;
+
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.impl.ClusterI.Procedure;
+import org.simantics.db.impl.ClusterSupport;
+import org.simantics.db.impl.Modifier;
+import org.simantics.db.impl.Table;
+import org.simantics.db.impl.TableFactory;
+import org.simantics.db.impl.TableSizeListener;
+
+public class OperationTable extends Table<int[]> {
+
+	    OperationTable(TableSizeListener sizeListener, int[] header, int headerBase, int[] ints) {
+	        super(TableFactory.getIntFactory(), sizeListener, header, headerBase, ints);
+	    }
+		int getOperationCount() {
+			return getTableCount();
+		}
+		int createOperation(int type, int argIndex, int valIndex, int valSize) {
+			int tableIndex = createNewElement(4);
+		    int realIndex = checkIndexAndGetRealIndex(tableIndex, 4);
+			int[] table = getTable();
+			table[realIndex] = type;
+			table[++realIndex] = argIndex;
+			table[++realIndex] = valIndex;
+			table[++realIndex] = valSize;
+		    return tableIndex - ZERO_SHIFT; // operation index is zero based
+		}
+		int getOperationType(int opIndex) {
+			int tableIndex = ZERO_SHIFT + opIndex*4;
+		    int realIndex = checkIndexAndGetRealIndex(tableIndex, 4);
+			int[] table = getTable();
+			return table[realIndex];
+		}
+		int getOperationArgumentIndex(int opIndex) {
+			int tableIndex = ZERO_SHIFT + opIndex*4;
+		    int realIndex = checkIndexAndGetRealIndex(tableIndex, 4);
+			int[] table = getTable();
+			return table[++realIndex];
+		}
+		int getValueIndex(int opIndex) {
+			int tableIndex = ZERO_SHIFT + opIndex*4;
+		    int realIndex = checkIndexAndGetRealIndex(tableIndex, 4);
+			int[] table = getTable();
+			return table[realIndex+2];
+		}
+		int getValueSize(int opIndex) {
+			int tableIndex = ZERO_SHIFT + opIndex*4;
+		    int realIndex = checkIndexAndGetRealIndex(tableIndex, 4);
+			int[] table = getTable();
+			return table[realIndex+3];
+		}
+        @Override
+        public <Context> boolean foreach(int setIndex, Procedure procedure, Context context,
+                ClusterSupport support, Modifier modifier) throws DatabaseException {
+            throw new UnsupportedOperationException();
+        }
+}