/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.sql.optimizer.plan;
import java.util.Collection;
import java.util.List;
public class GroupLoopScan extends BaseScan
{
private TableSource insideTable, outsideTable;
private boolean insideParent;
private List<ComparisonCondition> joinConditions;
public GroupLoopScan(TableSource insideTable, TableSource outsideTable,
boolean insideParent,
List<ComparisonCondition> joinConditions) {
this.insideTable = insideTable;
this.outsideTable = outsideTable;
this.insideParent = insideParent;
this.joinConditions = joinConditions;
}
public TableSource getInsideTable() {
return insideTable;
}
public TableSource getOutsideTable() {
return outsideTable;
}
public boolean isInsideParent() {
return insideParent;
}
public List<ComparisonCondition> getJoinConditions() {
return joinConditions;
}
@Override
public Collection<? extends ConditionExpression> getConditions() {
return getJoinConditions();
}
@Override
public void visitComparands(ExpressionRewriteVisitor v) {
}
@Override
public void visitComparands(ExpressionVisitor v) {
}
public ColumnExpression getOutsideJoinColumn() {
ComparisonCondition joinCondition = joinConditions.get(0);
ColumnExpression joinColumn = (ColumnExpression)joinCondition.getLeft();
if (joinColumn.getTable() == outsideTable)
return joinColumn;
joinColumn = (ColumnExpression)joinCondition.getRight();
assert (joinColumn.getTable() == outsideTable);
return joinColumn;
}
@Override
public boolean accept(PlanVisitor v) {
if (v.visitEnter(this)) {
// Don't own tables, right?
}
return v.visitLeave(this);
}
@Override
public String summaryString(SummaryConfiguration configuration) {
StringBuilder str = new StringBuilder(super.summaryString(configuration));
str.append('(');
str.append(outsideTable.getName());
str.append(" - ");
str.append(insideTable.getName());
if (getCostEstimate() != null) {
str.append(", ");
str.append(getCostEstimate());
}
str.append(")");
return str.toString();
}
}