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Order by random. Probably this isn't very optimal.

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git-svn-id: https://samskivert.googlecode.com/svn/trunk@2096 6335cc39-0255-0410-8fd6-9bcaacd3b74c
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ray
2007-04-27 03:13:10 +00:00
parent c47fe8dbcc
commit 17c9fbedc5
1 changed files with 9 additions and 0 deletions
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src/java/com/samskivert/jdbc/depot/clause/OrderBy.java
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@@ -25,6 +25,7 @@ import java.sql.SQLException;
import com.samskivert.jdbc.depot.ConstructedQuery; import com.samskivert.jdbc.depot.ConstructedQuery;
import com.samskivert.jdbc.depot.expression.ColumnExp; import com.samskivert.jdbc.depot.expression.ColumnExp;
import com.samskivert.jdbc.depot.expression.LiteralExp;
import com.samskivert.jdbc.depot.expression.SQLExpression; import com.samskivert.jdbc.depot.expression.SQLExpression;
/** /**
@@ -35,6 +36,14 @@ public class OrderBy extends QueryClause
/** Indicates the order of the clause. */ /** Indicates the order of the clause. */
public enum Order { ASC, DESC }; public enum Order { ASC, DESC };
/**
* Creates and returns a random order by clause.
*/
public static OrderBy random ()
{
return ascending(new LiteralExp("rand()"));
}
/** /**
* Creates and returns an ascending order by clause on the supplied column. * Creates and returns an ascending order by clause on the supplied column.
*/ */