A test case for large transactions (undo log larger than 2 GB).

h2/src/test/org/h2/test/todo/TestUndoLogLarge.java

+/*
+ * Copyright 2004-2010 H2 Group. Multiple-Licensed under the H2 License, Version
+ * 1.0, and under the Eclipse Public License, Version 1.0
+ * (http://h2database.com/html/license.html). Initial Developer: H2 Group
+ */
+package org.h2.test.todo;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+import java.sql.Statement;
+import org.h2.tools.DeleteDbFiles;
+
+/**
+ * A test with an undo log size of 2 GB.
+ */
+public class TestUndoLogLarge {
+
+    /**
+     * Run just this test.
+     *
+     * @param args ignored
+     */
+    public static void main(String... args) throws Exception {
+        // System.setProperty("h2.largeTransactions", "true");
+        new TestUndoLogLarge().test();
+    }
+
+    private void test() throws SQLException {
+        DeleteDbFiles.execute("data", "test", true);
+        Connection conn = DriverManager.getConnection("jdbc:h2:data/test");
+        Statement stat = conn.createStatement();
+        stat.execute("set max_operation_memory 100");
+        stat.execute("set max_memory_undo 100");
+        stat.execute("create table test(id identity, name varchar)");
+        conn.setAutoCommit(false);
+        PreparedStatement prep = conn.prepareStatement(
+                "insert into test(name) values(space(1024*1024))");
+        long time = System.currentTimeMillis();
+        for (int i=0; i<2500; i++) {
+            prep.execute();
+            long now = System.currentTimeMillis();
+            if (now > time + 5000) {
+                System.out.println(i);
+                time = now + 5000;
+            }
+        }
+        conn.rollback();
+        conn.close();
+    }
+}