org.verdictdb.core.rewriter.aggresult

Class SingleAggResultRewriter

java.lang.Object

org.verdictdb.core.rewriter.aggresult.SingleAggResultRewriter

public class SingleAggResultRewriter
extends Object

Given intermediate aggregate form (either the result of a single query execution or the result of the aggregates of multiple query results), we convert it to a user-friendly form.

Author:

Yongjoo Park

Constructor Summary

Constructors

Constructor and Description
SingleAggResultRewriter(AggregateFrame rawResultSet)

Method Summary

Modifier and Type	Method and Description
AggregateFrame	rewrite(List<String> nonaggColumns, List<AggNameAndType> aggColumns) Rewrites the raw result set into the result set with (intuitive) error bounds.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SingleAggResultRewriter

public SingleAggResultRewriter(AggregateFrame rawResultSet)

Method Detail

rewrite

public AggregateFrame rewrite(List<String> nonaggColumns,
                              List<AggNameAndType> aggColumns)
                       throws VerdictDBException

Rewrites the raw result set into the result set with (intuitive) error bounds.

Rewritten (or converted) result set should have the following columns: 1. groups (that appear in the group by clause) 2. aggregate columns

Parameters:

rawResultSet -

aggColumns - Each pair is (original agg alias, type of agg)

Returns:

Throws:

VerdictDBException