/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.translator.phoenix;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.teiid.language.*;
import org.teiid.metadata.Column;
import org.teiid.metadata.KeyRecord;
public class PhoenixSQLConversionVisitor extends org.teiid.translator.jdbc.SQLConversionVisitor {
private PhoenixExecutionFactory executionFactory ;
public PhoenixSQLConversionVisitor(PhoenixExecutionFactory ef) {
super(ef);
this.executionFactory = ef;
}
@Override
protected String getInsertKeyword() {
return "UPSERT"; //$NON-NLS-1$
}
@Override
public void visit(Like obj) {
obj.setEscapeCharacter(null); //not supported - capabilities ensure only \ is pushed
super.visit(obj);
}
@Override
public void visit(Update update) {
//use an upsert
List<ColumnReference> cols = new ArrayList<ColumnReference>();
List<Expression> vals = new ArrayList<Expression>();
for (SetClause set : update.getChanges()) {
cols.add(set.getSymbol());
vals.add(set.getValue());
}
Insert insert = null;
if (update.getWhere() == null) {
insert = new Insert(update.getTable(), cols, new ExpressionValueSource(vals));
} else {
List<DerivedColumn> select = new ArrayList<DerivedColumn>();
Set<Column> columns = new HashSet<Column>();
for (ColumnReference col : cols) {
columns.add(col.getMetadataObject());
}
for (Expression val : vals) {
select.add(new DerivedColumn(null, val));
}
KeyRecord pk = update.getTable().getMetadataObject().getPrimaryKey();
if(pk != null) {
for (Column c : pk.getColumns()) {
if (!columns.contains(c)) {
ColumnReference cr = new ColumnReference(update.getTable(), c.getName(), c, c.getJavaType());
select.add(new DerivedColumn(null, cr));
cols.add(cr);
}
}
}
Select query = new Select(select, false, Arrays.asList((TableReference)update.getTable()), update.getWhere(), null, null, null);
insert = new Insert(update.getTable(), cols, query);
}
append(insert);
}
public String getSQL(){
return buffer.toString();
}
}