/*
* 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.query.processor.relational;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.List;
import org.junit.Test;
import org.teiid.common.buffer.TupleBatch;
import org.teiid.query.sql.symbol.Constant;
public class TestLimitNode {
@Test public void testLimitInFirstBatch() throws Exception {
LimitNode node = getLimitNode(40, new FakeRelationalNode(2, getRows(100), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(40, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(40, batch.getEndRow());
assertTrue(batch.getTerminationFlag());
}
@Test public void testLimitAtBatchSize() throws Exception {
LimitNode node = getLimitNode(50, new FakeRelationalNode(2, getRows(100), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(50, batch.getEndRow());
assertTrue(batch.getTerminationFlag());
}
@Test public void testLimitInSecondBatch() throws Exception {
LimitNode node = getLimitNode(55, new FakeRelationalNode(2, getRows(100), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(50, batch.getEndRow());
assertFalse(batch.getTerminationFlag());
batch = node.nextBatch();
assertEquals(5, batch.getRowCount());
assertEquals(51, batch.getBeginRow());
assertEquals(55, batch.getEndRow());
assertTrue(batch.getTerminationFlag());
}
@Test public void testLimitMultipleOfBatchSize() throws Exception {
LimitNode node = getLimitNode(100, new FakeRelationalNode(2, getRows(150), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(50, batch.getEndRow());
assertFalse(batch.getTerminationFlag());
batch = node.nextBatch();
assertEquals(50, batch.getRowCount());
assertEquals(51, batch.getBeginRow());
assertEquals(100, batch.getEndRow());
assertTrue(batch.getTerminationFlag());
}
@Test public void testLimitProducesMultipleBatches() throws Exception {
LimitNode node = getLimitNode(130, new FakeRelationalNode(2, getRows(300), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(50, batch.getEndRow());
assertFalse(batch.getTerminationFlag());
batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(51, batch.getBeginRow());
assertEquals(100, batch.getEndRow());
assertFalse(batch.getTerminationFlag());
batch = node.nextBatch();
assertNotNull(batch);
assertEquals(30, batch.getRowCount());
assertEquals(101, batch.getBeginRow());
assertEquals(130, batch.getEndRow());
assertTrue(batch.getTerminationFlag());
}
@Test public void testLimitGetsNoRows() throws Exception {
LimitNode node = getLimitNode(100, new FakeRelationalNode(2, getRows(0), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(0, batch.getRowCount());
assertTrue(batch.getTerminationFlag());
}
@Test public void testZeroLimit() throws Exception {
LimitNode node = getLimitNode(0, new FakeRelationalNode(2, getRows(100), 50));
TupleBatch batch = node.nextBatch();
batch = node.nextBatch();
assertNotNull(batch);
assertEquals(0, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(0, batch.getEndRow());
assertTrue(batch.getTerminationFlag());
}
@Test public void testOffsetInFirstBatch() throws Exception {
LimitNode node = getOffsetNode(49, new FakeRelationalNode(2, getRows(100), 50));
// batch 1
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(1, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(1, batch.getEndRow());
assertEquals(Arrays.asList(new Object[] {new Integer(50)}), batch.getTuple(1));
assertFalse(batch.getTerminationFlag());
// batch2
batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(2, batch.getBeginRow());
assertEquals(51, batch.getEndRow());
assertEquals(Arrays.asList(new Object[] {new Integer(51)}), batch.getTuple(2));
assertTrue(batch.getTerminationFlag());
}
@Test public void testOffsetAtBatchSize() throws Exception {
LimitNode node = getOffsetNode(50, new FakeRelationalNode(2, getRows(100), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(50, batch.getEndRow());
assertEquals(Arrays.asList(new Object[] {new Integer(51)}), batch.getTuple(1));
assertTrue(batch.getTerminationFlag());
}
@Test public void testOffsetInSecondBatch() throws Exception {
LimitNode node = getOffsetNode(55, new FakeRelationalNode(2, getRows(100), 50));
// batch 1
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(45, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(45, batch.getEndRow());
assertEquals(Arrays.asList(new Object[] {new Integer(56)}), batch.getTuple(1));
assertTrue(batch.getTerminationFlag());
}
@Test public void testOffsetMultipleOfBatchSize() throws Exception {
LimitNode node = getOffsetNode(100, new FakeRelationalNode(2, getRows(300), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(50, batch.getEndRow());
assertEquals(Arrays.asList(new Object[] {new Integer(101)}), batch.getTuple(1));
assertFalse(batch.getTerminationFlag());
}
@Test public void testOffsetGreaterThanRowCount() throws Exception {
LimitNode node = getOffsetNode(100, new FakeRelationalNode(2, getRows(10), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(0, batch.getRowCount());
assertTrue(batch.getTerminationFlag());
}
@Test public void testOffsetNoRows() throws Exception {
LimitNode node = getOffsetNode(100, new FakeRelationalNode(2, getRows(0), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(0, batch.getRowCount());
assertTrue(batch.getTerminationFlag());
}
@Test public void testZeroOffset() throws Exception {
LimitNode node = getOffsetNode(0, new FakeRelationalNode(2, getRows(100), 50));
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(1, batch.getBeginRow());
assertEquals(50, batch.getEndRow());
assertFalse(batch.getTerminationFlag());
batch = node.nextBatch();
assertNotNull(batch);
assertEquals(50, batch.getRowCount());
assertEquals(51, batch.getBeginRow());
assertEquals(100, batch.getEndRow());
assertTrue(batch.getTerminationFlag());
}
@Test public void testOffsetWithoutLimit() throws Exception {
LimitNode node = new LimitNode(1, null, new Constant(new Integer(10)));
node.addChild(new FakeRelationalNode(2, getRows(10), 50));
node.open();
TupleBatch batch = node.nextBatch();
assertNotNull(batch);
assertEquals(0, batch.getRowCount());
assertTrue(batch.getTerminationFlag());
}
static List[] getRows(int rows) {
List[] data = new List[rows];
for (int i = 0; i < rows; i++) {
data[i] = Arrays.asList(new Object[] {new Integer(i+1)});
}
return data;
}
private static LimitNode getOffsetNode(int offset, RelationalNode child) throws Exception {
LimitNode node = new LimitNode(1, new Constant(new Integer(-1)), new Constant(new Integer(offset)));
node.addChild(child);
node.open();
return node;
}
private static LimitNode getLimitNode(int limit, RelationalNode child) throws Exception {
LimitNode node = new LimitNode(1, new Constant(new Integer(limit)), new Constant(new Integer(0)));
node.addChild(child);
node.open();
return node;
}
@Test public void testClone() {
LimitNode node = new LimitNode(1, new Constant(new Integer(-1)), null);
LimitNode clone = (LimitNode)node.clone();
assertEquals(node.getLimitExpr(), clone.getLimitExpr());
assertNull(clone.getOffsetExpr());
node = new LimitNode(1, null, new Constant(new Integer(-1)));
clone = (LimitNode)node.clone();
assertNull(clone.getLimitExpr());
}
}