Issue 468: trunc(timestamp) could return the wrong value.

h2/src/main/org/h2/expression/Function.java

@@ -1033,7 +1033,7 @@ public class Function extends Expression implements FunctionCall {
                 java.sql.Timestamp d = v0.getTimestamp();
                 Calendar c = Calendar.getInstance();
                 c.setTime(d);
-                c.set(Calendar.HOUR, 0);
+                c.set(Calendar.HOUR_OF_DAY, 0);
                 c.set(Calendar.MINUTE, 0);
                 c.set(Calendar.SECOND, 0);
                 c.set(Calendar.MILLISECOND, 0);

h2/src/test/org/h2/test/testSimple.in.txt

+select trunc(timestamp '2001-01-01 14:00:00.0');
+> 2001-01-01 00:00:00.0;
 select 1 from(select 2 from(select 1) a right join dual b) c;
 > 1;
 select 1.00 / 3 * 0.00;
@@ -134,10 +136,6 @@ create memory temp table test(name varchar primary key);
 select index_class from information_schema.indexes where table_name = 'TEST';
 > org.h2.index.TreeIndex;
 drop table test;
-create cached temp table test(name varchar primary key);
-select index_class from information_schema.indexes where table_name = 'TEST';
-> org.h2.index.PageBtreeIndex;
-drop table test;
 create table test(id int);
 alter table test alter column id set default 'x';
 select column_default from information_schema.columns c where c.table_name = 'TEST' and c.column_name = 'ID';