/*
 * 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;

import static org.junit.Assert.*;
import static org.teiid.query.processor.TestProcessor.*;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import org.junit.Test;
import org.teiid.UserDefinedAggregate;
import org.teiid.common.buffer.BufferManagerFactory;
import org.teiid.common.buffer.impl.BufferManagerImpl;
import org.teiid.core.types.ArrayImpl;
import org.teiid.core.types.BinaryType;
import org.teiid.core.types.DataTypeManager;
import org.teiid.metadata.AggregateAttributes;
import org.teiid.metadata.FunctionMethod;
import org.teiid.metadata.FunctionParameter;
import org.teiid.metadata.MetadataStore;
import org.teiid.metadata.Schema;
import org.teiid.query.metadata.QueryMetadataInterface;
import org.teiid.query.metadata.TransformationMetadata;
import org.teiid.query.optimizer.TestAggregatePushdown;
import org.teiid.query.optimizer.TestOptimizer;
import org.teiid.query.optimizer.TestOptimizer.ComparisonMode;
import org.teiid.query.optimizer.capabilities.BasicSourceCapabilities;
import org.teiid.query.optimizer.capabilities.CapabilitiesFinder;
import org.teiid.query.optimizer.capabilities.DefaultCapabilitiesFinder;
import org.teiid.query.optimizer.capabilities.FakeCapabilitiesFinder;
import org.teiid.query.optimizer.capabilities.SourceCapabilities.Capability;
import org.teiid.query.resolver.TestResolver;
import org.teiid.query.sql.lang.Command;
import org.teiid.query.unittest.RealMetadataFactory;
import org.teiid.query.util.CommandContext;
import org.teiid.query.validator.TestValidator;
import org.teiid.translator.SourceSystemFunctions;

@SuppressWarnings({"nls", "unchecked", "rawtypes"})
public class TestAggregateProcessing {

	static void sampleDataBQT3(FakeDataManager dataMgr) throws Exception {
		QueryMetadataInterface metadata = RealMetadataFactory.exampleBQTCached();

		// Group bqt1.smalla

		List[] tuples = new List[20];
		for (int i = 0; i < tuples.length; i++) {
			tuples[i] = new ArrayList(17);
			tuples[i].add(new Integer(i));
			tuples[i].add("" + i); //$NON-NLS-1$
			tuples[i].add(new Integer(i + 1));
			for (int j = 0; j < 14; j++) {
				tuples[i].add(null);
			}
		}

		dataMgr.registerTuples(metadata, "bqt1.smalla", tuples); //$NON-NLS-1$

		tuples = new List[20];
		for (int i = 0; i < tuples.length; i++) {
			tuples[i] = new ArrayList(17);
			tuples[i].add(new Integer(i));
			for (int j = 0; j < 16; j++) {
				tuples[i].add(null);
			}
		}

		dataMgr.registerTuples(metadata, "bqt2.mediumb", tuples); //$NON-NLS-1$
	}

	private void sampleDataBQT_defect9842(FakeDataManager dataMgr) throws Exception {
		QueryMetadataInterface metadata = RealMetadataFactory.exampleBQTCached();

		List[] tuples = new List[5];
		for (int i = 0; i < tuples.length; i++) {
			int k = i + 10;
			tuples[i] = new ArrayList(17);
			if (i < 2) {
				tuples[i].add(new Integer(1)); // need duplicate values
			} else {
				tuples[i].add(new Integer(2)); // need duplicate values
			}
			tuples[i].add("" + k); //$NON-NLS-1$
			tuples[i].add(new Integer(k + 1));
			tuples[i].add("" + (k + 1)); //$NON-NLS-1$
			tuples[i].add(new Float(0.5));
			for (int j = 0; j < 8; j++) {
				tuples[i].add(null);
			}
			tuples[i].add(new Short((short) k));
			tuples[i].add(null);
			tuples[i].add(new BigDecimal("" + k)); //$NON-NLS-1$
			tuples[i].add(null);
		}

		dataMgr.registerTuples(metadata, "bqt1.smalla", tuples); //$NON-NLS-1$
	}

	@Test public void testAggregateOnBQT() throws Exception {
		// Create query
		String sql = "SELECT IntKey, SUM(IntNum) FROM BQT1.SmallA GROUP BY IntKey, IntNum HAVING IntNum > 10 ORDER BY IntKey"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(new Object[] { new Integer(10), new Long(11) }),
				Arrays.asList(new Object[] { new Integer(11), new Long(12) }),
				Arrays.asList(new Object[] { new Integer(12), new Long(13) }),
				Arrays.asList(new Object[] { new Integer(13), new Long(14) }),
				Arrays.asList(new Object[] { new Integer(14), new Long(15) }),
				Arrays.asList(new Object[] { new Integer(15), new Long(16) }),
				Arrays.asList(new Object[] { new Integer(16), new Long(17) }),
				Arrays.asList(new Object[] { new Integer(17), new Long(18) }),
				Arrays.asList(new Object[] { new Integer(18), new Long(19) }),
				Arrays.asList(new Object[] { new Integer(19), new Long(20) }) };

		// Construct data manager with data
		FakeDataManager dataManager = new FakeDataManager();
		sampleDataBQT3(dataManager);

		// Plan query
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory
				.exampleBQTCached());

		// Run query
		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testAggregateSubquery() throws Exception {
		// Create query
		String sql = "SELECT IntKey, SUM((select IntNum from bqt1.smallb where intkey = smalla.intkey)) FROM BQT1.SmallA GROUP BY IntKey, IntNum HAVING IntNum > 10 ORDER BY IntKey"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(new Object[] { 1, 2l }),
				Arrays.asList(new Object[] { 2, 3l }) };

		// Construct data manager with data
		HardcodedDataManager dataManager = new HardcodedDataManager();
		dataManager.addData("SELECT g_0.IntKey, g_0.IntNum FROM BQT1.SmallA AS g_0 WHERE g_0.IntNum > 10", new List<?>[] {Arrays.asList(1, 2), Arrays.asList(2, 3)});
		dataManager.addData("SELECT g_0.IntNum FROM BQT1.SmallB AS g_0 WHERE g_0.IntKey = 1", new List<?>[] {Arrays.asList(2)});
		dataManager.addData("SELECT g_0.IntNum FROM BQT1.SmallB AS g_0 WHERE g_0.IntKey = 2", new List<?>[] {Arrays.asList(3)});
		
		// Plan query
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.exampleBQTCached(), TestOptimizer.getGenericFinder());

		// Run query
		helpProcess(plan, dataManager, expected);
	}

	@Test public void testAggregateOnBQT2() throws Exception {
		// Create query
		String sql = "SELECT IntNum, IsNotNull FROM (SELECT IntNum, LongNum, COUNT(IntNum) AS IsNotNull FROM BQT1.SmallA GROUP BY IntNum, LongNum HAVING LongNum IS NULL ) AS x ORDER BY IntNum, IsNotNull"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(new Object[] { new Integer(1), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(2), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(3), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(4), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(5), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(6), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(7), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(8), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(9), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(10), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(11), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(12), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(13), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(14), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(15), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(16), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(17), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(18), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(19), new Integer(1) }),
				Arrays.asList(new Object[] { new Integer(20), new Integer(1) }) };

		// Construct data manager with data
		FakeDataManager dataManager = new FakeDataManager();
		sampleDataBQT3(dataManager);

		// Plan query
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory
				.exampleBQTCached());

		// Run query
		helpProcess(plan, dataManager, expected);
	}

	@Test public void testAggregateOnBQT_defect9842() throws Exception {
		// Create query
		String sql = "SELECT IntKey, SUM((BigDecimalValue)*(ShortValue)-(BigDecimalValue)*(ShortValue)*(FloatNum)) " + //$NON-NLS-1$
				"AS MySum FROM BQT1.SmallA GROUP BY IntKey ORDER BY IntKey"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(new Object[] { new Integer(1),
						new BigDecimal("110.5000000") }), //$NON-NLS-1$
				Arrays.asList(new Object[] { new Integer(2),
						new BigDecimal("254.5000000") }) //$NON-NLS-1$
		};

		// Construct data manager with data
		FakeDataManager dataManager = new FakeDataManager();
		sampleDataBQT_defect9842(dataManager);

		// Plan query
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory
				.exampleBQTCached());

		// Run query
		helpProcess(plan, dataManager, expected);
	}
	
    @Test public void testCase186260() {
        /*
         * This case revealed that an expression like "COUNT( DISTINCT e1 )", where the type of e1 is 
         * anything but integer, was not handled properly.  We tried to use "integer" (the type of the
         * COUNT expression) to work with the e1 tuples.
         */
        // Create query 
        String sql = "SELECT COUNT(DISTINCT pm1.g2.e1), COUNT(DISTINCT pm1.g3.e1) FROM pm1.g2, pm1.g3"; //$NON-NLS-1$
        
        // Create expected results
        List[] expected = new List[] { 
            Arrays.asList(new Object[] { new Integer(3), new Integer(3) }),
        };    
    
        // Construct data manager with data
        FakeDataManager dataManager = new FakeDataManager();
        sampleData1(dataManager);
        
        // Plan query
        ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());
        
        // Run query
        helpProcess(plan, dataManager, expected);
    }
    
	@Test public void testAggregatePushdown() {
    	Command command = helpParse("select e1, count(e2), max(e2) from (select e1, e2, e3 from pm1.g1 union all select e1, e2, e3 from pm1.g2 union all select e1, e2, e3 from pm2.g1) z group by e1"); //$NON-NLS-1$
    	
    	FakeCapabilitiesFinder capFinder = new FakeCapabilitiesFinder();
    	capFinder.addCapabilities("pm1", TestAggregatePushdown.getAggregateCapabilities()); //$NON-NLS-1$
    	capFinder.addCapabilities("pm2", TestOptimizer.getTypicalCapabilities()); //$NON-NLS-1$
    	HardcodedDataManager dataManager = new HardcodedDataManager();
    	
    	dataManager.addData("SELECT g_0.e1, COUNT(g_0.e2), MAX(g_0.e2) FROM pm1.g1 AS g_0 GROUP BY g_0.e1", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList("a", Integer.valueOf(2), Integer.valueOf(1)), //$NON-NLS-1$
    			});
    	dataManager.addData("SELECT g_0.e1, COUNT(g_0.e2), MAX(g_0.e2) FROM pm1.g2 AS g_0 GROUP BY g_0.e1", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList("a", Integer.valueOf(3), Integer.valueOf(2)), //$NON-NLS-1$
    			});
    	dataManager.addData("SELECT g_0.e1, g_0.e2 FROM pm2.g1 AS g_0", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList("a", Integer.valueOf(3)), //$NON-NLS-1$
    				Arrays.asList("xyz", Integer.valueOf(4)), //$NON-NLS-1$
    				Arrays.asList(null, Integer.valueOf(5)),
    			});
    	
    	ProcessorPlan plan = helpGetPlan(command, RealMetadataFactory.example1Cached(), capFinder);
    	
    	List[] expected = new List[] { 
                Arrays.asList(null, Integer.valueOf(1), Integer.valueOf(5)),
                Arrays.asList("a", Integer.valueOf(6), Integer.valueOf(3)), //$NON-NLS-1$
                Arrays.asList("xyz", Integer.valueOf(1), Integer.valueOf(4)) //$NON-NLS-1$
            };    
    	
    	helpProcess(plan, dataManager, expected);
    }
    
	@Test public void testUnionAggregatePushdown() {
    	Command command = helpParse("select count(*), max(e3) from (select e1, e2, e3 from pm1.g1 union all (select convert(e2, string) as a, e2, e3 from pm2.g2 order by a limit 10)) x group by e1, e2"); //$NON-NLS-1$
    	
    	FakeCapabilitiesFinder capFinder = new FakeCapabilitiesFinder();
    	capFinder.addCapabilities("pm1", TestAggregatePushdown.getAggregateCapabilities()); //$NON-NLS-1$
    	BasicSourceCapabilities bac = TestAggregatePushdown.getAggregateCapabilities();
    	bac.setFunctionSupport("convert", true); //$NON-NLS-1$
    	capFinder.addCapabilities("pm2", bac); //$NON-NLS-1$
    	HardcodedDataManager dataManager = new HardcodedDataManager();
    	
    	dataManager.addData("SELECT g_0.e1, g_0.e2, COUNT(*), MAX(g_0.e3) FROM pm1.g1 AS g_0 GROUP BY g_0.e1, g_0.e2", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList("2", Integer.valueOf(2), Integer.valueOf(2), null), //$NON-NLS-1$
    				Arrays.asList("1", Integer.valueOf(1), Integer.valueOf(3), Boolean.TRUE), //$NON-NLS-1$
    			});
    	dataManager.addData("SELECT v_0.c_0, v_0.c_1, COUNT(*), MAX(v_0.c_2) FROM (SELECT convert(g_0.e2, string) AS c_0, g_0.e2 AS c_1, g_0.e3 AS c_2 FROM pm2.g2 AS g_0 ORDER BY c_0 LIMIT 10) AS v_0 GROUP BY v_0.c_0, v_0.c_1", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList("1", Integer.valueOf(1), Integer.valueOf(4), Boolean.FALSE), //$NON-NLS-1$
    			});
    	
    	ProcessorPlan plan = helpGetPlan(command, RealMetadataFactory.example1Cached(), capFinder);
    	
    	List[] expected = new List[] { 
                Arrays.asList(Integer.valueOf(7), Boolean.TRUE),
                Arrays.asList(Integer.valueOf(2), null),
            };    
    	
    	helpProcess(plan, dataManager, expected);
    }
	
    @Test public void testPushDownOverUnionMixed1() throws Exception {
        FakeCapabilitiesFinder capFinder = new FakeCapabilitiesFinder();
        BasicSourceCapabilities caps = TestAggregatePushdown.getAggregateCapabilities();
        caps.setFunctionSupport(SourceSystemFunctions.POWER, true);
        caps.setFunctionSupport(SourceSystemFunctions.CONVERT, true);
        capFinder.addCapabilities("pm2", caps); //$NON-NLS-1$
        capFinder.addCapabilities("pm1", TestOptimizer.getTypicalCapabilities()); //$NON-NLS-1$
        
        ProcessorPlan plan = helpGetPlan(helpParse("select max(e2), count(*), stddev_pop(e2), var_samp(e2) from (select e1, e2 from pm1.g1 union all select e1, e2 from pm2.g2) z"), RealMetadataFactory.example1Cached(), capFinder); //$NON-NLS-1$
        
        HardcodedDataManager dataManager = new HardcodedDataManager();
        dataManager.addData("SELECT g_0.e2 FROM pm1.g1 AS g_0", new List[] {Arrays.asList(1), Arrays.asList(2)});
        dataManager.addData("SELECT MAX(g_0.e2), COUNT(*), COUNT(g_0.e2), SUM(power(g_0.e2, 2)), SUM(g_0.e2) FROM pm2.g2 AS g_0", new List[] {Arrays.asList(5, 6, 4, BigInteger.valueOf(50l), 10l)});
        
        List[] expected = new List[] {
    		Arrays.asList(5, 8, 2.1147629234082532, 5.366666666666666),
        }; 
        
        helpProcess(plan, dataManager, expected);
    }

    @Test public void testBooleanAgg() {
    	String sql = "select every(e3), any(e3) from pm1.g1"; //$NON-NLS-1$
    	
        List[] expected = new List[] {
        		Arrays.asList(Boolean.FALSE, Boolean.TRUE),
        };    
    
        FakeDataManager dataManager = new FakeDataManager();
        sampleData1(dataManager);
        
        ProcessorPlan plan = helpGetPlan(helpParse(sql), RealMetadataFactory.example1Cached());
        
        helpProcess(plan, dataManager, expected);
    }
    
    @Test public void testStatsFunctions() {
    	String sql = "select stddev_pop(e2), var_samp(e2) from pm1.g1"; //$NON-NLS-1$
    	
        List[] expected = new List[] {
        		Arrays.asList(1.0671873729054748, 1.3666666666666667),
        };    
    
        FakeDataManager dataManager = new FakeDataManager();
        sampleData1(dataManager);
        
        ProcessorPlan plan = helpGetPlan(helpParse(sql), RealMetadataFactory.example1Cached());
        
        helpProcess(plan, dataManager, expected);
    }
    
    @Test public void testStatsFunctions1() {
    	String sql = "select stddev_samp(e2), var_pop(e2) from (select 2 e2) x"; //$NON-NLS-1$
    	
        List[] expected = new List[] {
        		Arrays.asList(null, 0.0),
        };    
    
        FakeDataManager dataManager = new FakeDataManager();
        sampleData1(dataManager);
        
        ProcessorPlan plan = helpGetPlan(helpParse(sql), RealMetadataFactory.example1Cached());
        
        helpProcess(plan, dataManager, expected);
    }
    
	@Test public void testJira1621() throws Exception {
		// Create query
		String sql = "SELECT sum(t2.e4) as s, max(t1.e1 || t2.e1) FROM pm1.g1 as t1, pm1.g2 as t2, pm1.g3 as t3 WHERE t1.e1 = coalesce(t2.e1, 'b') AND t2.e2 = t3.e2 GROUP BY t2.e2, t2.e3, t3.e2 ORDER BY s"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(null, "cc"),
				Arrays.asList(0.0, "bb"),
				Arrays.asList(2.0, null),
				Arrays.asList(21.0, "aa"),
				Arrays.asList(24.0, "aa")
		};

		// Construct data manager with data
		FakeDataManager dataManager = new FakeDataManager();
		sampleData1(dataManager);

		// Plan query
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());

		// Run query
		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testMultiJoinCriteria() throws Exception {
		String sql = "SELECT count(t2.e4) as s FROM pm1.g1 as t1, pm1.g2 as t2, pm1.g3 as t3 WHERE t1.e1 = t2.e1 and t2.e2 = t3.e2 and t1.e3 || t2.e3 = t3.e3"; //$NON-NLS-1$

		List[] expected = new List[] {
				Arrays.asList(0)
		};

		FakeDataManager dataManager = new FakeDataManager();
		sampleData1(dataManager);

		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());

		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testMultiJoinGroupBy() throws Exception {
		String sql = "SELECT count(t2.e4) as s, t1.e3 || t2.e3 FROM pm1.g1 as t1, pm1.g2 as t2, pm1.g3 as t3 WHERE t1.e1 = t2.e1 and t2.e2 = t3.e2 GROUP BY t1.e3 || t2.e3"; //$NON-NLS-1$

		List[] expected = new List[] {
				Arrays.asList(9, "falsefalse"),
				Arrays.asList(2, "falsetrue"),
				Arrays.asList(4, "truefalse"),
				Arrays.asList(1, "truetrue"),
		};

		FakeDataManager dataManager = new FakeDataManager();
		sampleData1(dataManager);

		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());

		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testArrayAggOrderByPersistence() throws Exception {
		// Create query
		String sql = "SELECT array_agg(e2 order by e1) from pm1.g1 group by e3"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(new ArrayImpl(new Integer[] {1, 0, 0, 2})),
				Arrays.asList(new ArrayImpl(new Integer[] {3, 1})),
		};

		// Construct data manager with data
		FakeDataManager dataManager = new FakeDataManager();
		sampleData1(dataManager);

		// Plan query
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());
		CommandContext cc = TestProcessor.createCommandContext();
		BufferManagerImpl impl = BufferManagerFactory.getTestBufferManager(0, 2);
		cc.setBufferManager(impl);
		// Run query
		helpProcess(plan, cc, dataManager, expected);
	}
	
	@Test public void testDupGroupCombination() throws Exception {
        String sql = "select count(e2), e1 from (select distinct e1, e2, e3 from pm1.g1) x group by e1"; //$NON-NLS-1$

        List[] expected = new List[] {
				Arrays.asList(2, "a"),
		};

		HardcodedDataManager dataManager = new HardcodedDataManager();
		dataManager.addData("SELECT pm1.g1.e1, pm1.g1.e2, pm1.g1.e3 FROM pm1.g1", new List[] {
				Arrays.asList("a", 0, Boolean.TRUE),
				Arrays.asList("a", 0, Boolean.FALSE),
		});

		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());
		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testAggFilter() throws Exception {
		// Create query
		String sql = "SELECT e2, count(*) filter (where e3) from pm1.g1 group by e2 order by e2"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(0, 0),
				Arrays.asList(1, 1),
				Arrays.asList(2, 0),
				Arrays.asList(3, 1),
		};

		// Construct data manager with data
		FakeDataManager dataManager = new FakeDataManager();
		sampleData1(dataManager);

		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());
		helpProcess(plan, dataManager, expected);
	}
	
	public static class SumAll implements UserDefinedAggregate<Integer> {
		
		private boolean isNull = true;
		private int result;
		
		public void addInput(Integer... vals) {
			isNull = false;
			for (int i : vals) {
				result += i;
			}
		}
		
		@Override
		public Integer getResult(org.teiid.CommandContext commandContext) {
			if (isNull) {
				return null;
			}
			return result;
		}

		@Override
		public void reset() {
			isNull = true;
			result = 0;
		}
		
	}
	
	public static class CustomSum implements UserDefinedAggregate<Integer> {
		
		private boolean isNull = true;
		private int result;
		
		public void addInput(Integer... vals) {
			isNull = false;
			for (Integer i : vals) {
				if (i == null) {
					result += 0;
					continue;
				}
				result += i;
			}
		}
		
		@Override
		public Integer getResult(org.teiid.CommandContext commandContext) {
			if (isNull) {
				return null;
			}
			return result;
		}

		@Override
		public void reset() {
			isNull = true;
			result = 0;
		}
		
	}
	
	
	public static class LongSumAll implements UserDefinedAggregate<Long> {
		
		private boolean isNull = true;
		private long result;
		
		public void addInput(Integer... vals) {
			isNull = false;
			for (int i : vals) {
				result += i;
			}
		}
		
		@Override
		public Long getResult(org.teiid.CommandContext commandContext) {
			if (isNull) {
				return null;
			}
			return result;
		}

		@Override
		public void reset() {
			isNull = true;
			result = 0;
		}
		
	}
	
	@Test public void testUserDefined() throws Exception {
		MetadataStore ms = RealMetadataFactory.example1Store();
		Schema s = ms.getSchemas().get("PM1");
		AggregateAttributes aa = addAgg(s, "myagg", SumAll.class, DataTypeManager.DefaultDataTypes.INTEGER).getAggregateAttributes();
		addAgg(s, "myagg2", LongSumAll.class, DataTypeManager.DefaultDataTypes.LONG);
		TransformationMetadata metadata = RealMetadataFactory.createTransformationMetadata(ms, "test");

		Command c = TestResolver.helpResolve("select myagg2(distinct e2) from pm1.g1", metadata);
		assertEquals(DataTypeManager.DefaultDataClasses.LONG, c.getProjectedSymbols().get(0).getType());
		
		//must be in agg form
		TestValidator.helpValidate("SELECT myagg(e2) from pm1.g1", new String[] {}, metadata);

		//run validations over default AggregateAttributes
		TestValidator.helpValidate("SELECT myagg(distinct e2) from pm1.g1", new String[] {"myagg(DISTINCT e2)"}, metadata);
		TestValidator.helpValidate("SELECT myagg(e2 order by e1) from pm1.g1", new String[] {"myagg(ALL e2 ORDER BY e1)"}, metadata);
		TestValidator.helpValidate("SELECT myagg(ALL e2, e2) over () from pm1.g1", new String[] {}, metadata);

		aa.setAllowsDistinct(true);
		aa.setAllowsOrderBy(true);
		
		TestValidator.helpValidate("SELECT myagg(distinct e2) from pm1.g1", new String[] {}, metadata);
		TestValidator.helpValidate("SELECT myagg(e2 order by e1) from pm1.g1", new String[] {}, metadata);

		aa.setAnalytic(true);

		TestValidator.helpValidate("SELECT myagg(distinct e2) from pm1.g1", new String[] {"myagg(DISTINCT e2)"}, metadata);
		TestValidator.helpValidate("SELECT myagg(e2, e2) over () from pm1.g1", new String[] {}, metadata);
		
		aa.setAnalytic(false);

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(6, 6),
				Arrays.asList(8, 8),
		};

		// Construct data manager with data
		FakeDataManager dataManager = new FakeDataManager();
		sampleData1(dataManager);
		
		ProcessorPlan plan = helpGetPlan("select myagg(all e2, e2 order by e1), myagg(e2, e2) from pm1.g1 group by e3", metadata);
		helpProcess(plan, dataManager, expected);
	}

	private FunctionMethod addAgg(Schema s, String name, Class<?> clazz, String returns) {
		FunctionMethod fm = new FunctionMethod();
		fm.setName(name);
		fm.setInvocationClass(clazz.getName());
		fm.setInvocationMethod("addInput");
		FunctionParameter fp = new FunctionParameter();
		fp.setType(DataTypeManager.DefaultDataTypes.INTEGER);
		fp.setName("arg");
		fp.setVarArg(true);
		fm.getInputParameters().add(fp);
		FunctionParameter fpout = new FunctionParameter();
		fpout.setType(returns);
		fpout.setName("outp");
		fm.setOutputParameter(fpout);

		AggregateAttributes aa = new AggregateAttributes();
		fm.setAggregateAttributes(aa);
		s.getFunctions().put(fm.getName(), fm);
		return fm;
	}
	
    @Test public void testNullDependentAggParitioned() throws Exception {
    	MetadataStore ms = RealMetadataFactory.example1Store();
		Schema s = ms.getSchemas().get("PM1");
		FunctionMethod fm = addAgg(s, "myagg", SumAll.class, DataTypeManager.DefaultDataTypes.INTEGER);
		fm.setNullOnNull(false);
		fm.getAggregateAttributes().setDecomposable(true);
		TransformationMetadata metadata = RealMetadataFactory.createTransformationMetadata(ms, "test");

        final String userSql = "SELECT myagg(e2), source_name FROM (select e2, 'a' as source_name from pm1.g1 union all select e2, 'b' from pm2.g1) x group by source_name"; //$NON-NLS-1$
        BasicSourceCapabilities caps = TestAggregatePushdown.getAggregateCapabilities();
        caps.setFunctionSupport("myagg", true);
		ProcessorPlan plan = TestOptimizer.helpPlan(userSql, metadata, new String[] {"SELECT myagg(ALL v_0.c_1), v_0.c_0 FROM (SELECT 'a' AS c_0, g_0.e2 AS c_1 FROM pm1.g1 AS g_0) AS v_0 GROUP BY v_0.c_0", 
				"SELECT myagg(ALL v_0.c_1), v_0.c_0 FROM (SELECT 'b' AS c_0, g_0.e2 AS c_1 FROM pm2.g1 AS g_0) AS v_0 GROUP BY v_0.c_0"}, new DefaultCapabilitiesFinder(caps), ComparisonMode.EXACT_COMMAND_STRING);
		
        TestOptimizer.checkNodeTypes(plan, new int[] {
                2,      // Access
                0,      // DependentAccess
                0,      // DependentSelect
                0,      // DependentProject
                0,      // DupRemove
                0,      // Grouping
                0,      // NestedLoopJoinStrategy
                0,      // MergeJoinStrategy
                0,      // Null
                0,      // PlanExecution
                1,      // Project
                0,      // Select
                0,      // Sort
                1       // UnionAll
            });
    }
    
    @Test public void testNullDependentAgg() throws Exception {
    	MetadataStore ms = RealMetadataFactory.example1Store();
		Schema s = ms.getSchemas().get("PM1");
		FunctionMethod fm = addAgg(s, "myagg", SumAll.class, DataTypeManager.DefaultDataTypes.INTEGER);
		fm.setNullOnNull(false);
		fm.getAggregateAttributes().setDecomposable(true);
		TransformationMetadata metadata = RealMetadataFactory.createTransformationMetadata(ms, "test");

        final String userSql = "SELECT myagg(e2) FROM (select e2, e1 as source_name from pm1.g1 union all select e2, e1 from pm2.g1) x"; //$NON-NLS-1$
        BasicSourceCapabilities caps = TestAggregatePushdown.getAggregateCapabilities();
        caps.setFunctionSupport("myagg", true);
		ProcessorPlan plan = TestOptimizer.helpPlan(userSql, metadata, new String[] {"SELECT myagg(ALL g_0.e2) FROM pm1.g1 AS g_0 HAVING COUNT(*) > 0", 
				"SELECT myagg(ALL g_0.e2) FROM pm2.g1 AS g_0 HAVING COUNT(*) > 0"}, new DefaultCapabilitiesFinder(caps), ComparisonMode.EXACT_COMMAND_STRING);
		
        TestOptimizer.checkNodeTypes(plan, new int[] {
                2,      // Access
                0,      // DependentAccess
                0,      // DependentSelect
                0,      // DependentProject
                0,      // DupRemove
                1,      // Grouping
                0,      // NestedLoopJoinStrategy
                0,      // MergeJoinStrategy
                0,      // Null
                0,      // PlanExecution
                1,      // Project
                0,      // Select
                0,      // Sort
                1       // UnionAll
            });
    }

    @Test public void testNullDependentAgg1() throws Exception {
    	MetadataStore ms = RealMetadataFactory.example1Store();
		Schema s = ms.getSchemas().get("PM1");
		FunctionMethod fm = addAgg(s, "myagg", CustomSum.class, DataTypeManager.DefaultDataTypes.STRING);
		fm.setNullOnNull(false);
		fm.getAggregateAttributes().setDecomposable(true);
		TransformationMetadata metadata = RealMetadataFactory.createTransformationMetadata(ms, "test");

        final String userSql = "SELECT myagg(e2) FROM (select e2, e1 as source_name from pm1.g1 union all select e2, e1 from pm2.g1) x"; //$NON-NLS-1$
        BasicSourceCapabilities caps = TestAggregatePushdown.getAggregateCapabilities();
        caps.setFunctionSupport("myagg", true);
        caps.setCapabilitySupport(Capability.CRITERIA_COMPARE_ORDERED, false);
		ProcessorPlan plan = TestOptimizer.helpPlan(userSql, metadata, new String[] {"SELECT COUNT(*), myagg(ALL g_0.e2) FROM pm2.g1 AS g_0", "SELECT COUNT(*), myagg(ALL g_0.e2) FROM pm1.g1 AS g_0"}, new DefaultCapabilitiesFinder(caps), ComparisonMode.EXACT_COMMAND_STRING);
		
        TestOptimizer.checkNodeTypes(plan, new int[] {
                2,      // Access
                0,      // DependentAccess
                0,      // DependentSelect
                0,      // DependentProject
                0,      // DupRemove
                1,      // Grouping
                0,      // NestedLoopJoinStrategy
                0,      // MergeJoinStrategy
                0,      // Null
                0,      // PlanExecution
                3,      // Project
                2,      // Select
                0,      // Sort
                1       // UnionAll
            });
        
        HardcodedDataManager dataManager = new HardcodedDataManager();
		
		dataManager.addData("SELECT COUNT(*), myagg(ALL g_0.e2) FROM pm1.g1 AS g_0", new List<?>[] {Arrays.asList(0, null)});
		dataManager.addData("SELECT COUNT(*), myagg(ALL g_0.e2) FROM pm2.g1 AS g_0", new List<?>[] {Arrays.asList(0, null)});
		
		//if we don't filter the nulls, then we'd get 0
		helpProcess(plan, dataManager, new List[] {Collections.singletonList(null)});
    }
	
	@Test public void testMultiCount() throws Exception {
		// Create query
		String sql = "SELECT count(pm1.g1.e2), count(pm2.g2.e2) from pm1.g1, pm2.g2 where pm1.g1.e1 = pm2.g2.e1"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(3, 2),
		};

		// Construct data manager with data
		HardcodedDataManager dataManager = new HardcodedDataManager();
		
		dataManager.addData("SELECT g_0.e1 AS c_0, COUNT(g_0.e2) AS c_1 FROM pm1.g1 AS g_0 GROUP BY g_0.e1 ORDER BY c_0", new List<?>[] {Arrays.asList("a", 1), Arrays.asList("b", 2)});
		dataManager.addData("SELECT g_0.e1 AS c_0, g_0.e2 AS c_1 FROM pm2.g2 AS g_0 ORDER BY c_0", new List<?>[] {Arrays.asList("a", 6), Arrays.asList("b", 5)});
		
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached(), TestAggregatePushdown.getAggregatesFinder());
		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testUnaliasedAggInDeleteCompensation() throws Exception {
		String sql = "delete from pm3.g1 where e1 = (SELECT MAX(e1) FROM pm3.g1 as z where e2 = pm3.g1.e2)"; //$NON-NLS-1$

		List[] expected = new List[] {
				Arrays.asList(1),
		};

		HardcodedDataManager dataManager = new HardcodedDataManager();
		
		dataManager.addData("SELECT g_0.e1 AS c_0, g_0.e2 AS c_1 FROM pm3.g1 AS g_0 ORDER BY c_1, c_0", new List<?>[] {Arrays.asList("a", 1)});
		dataManager.addData("SELECT MAX(g_0.e1) AS c_0, g_0.e2 AS c_1 FROM pm3.g1 AS g_0 GROUP BY g_0.e2 ORDER BY c_1, c_0", new List<?>[] {Arrays.asList("a", 1)});
		dataManager.addData("DELETE FROM pm3.g1 WHERE pm3.g1.e1 = 'a'", new List<?>[] {Arrays.asList(1)});
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example4(), TestAggregatePushdown.getAggregatesFinder());
		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testEmptyCountOverJoin() {
    	Command command = helpParse("select count(pm1.g1.e2) from pm1.g1, pm1.g2 where pm1.g1.e1 = pm1.g2.e1"); //$NON-NLS-1$
    	
    	FakeCapabilitiesFinder capFinder = new FakeCapabilitiesFinder();
    	BasicSourceCapabilities bsc = TestAggregatePushdown.getAggregateCapabilities();
    	bsc.setCapabilitySupport(Capability.QUERY_FROM_JOIN_INNER, false);
    	bsc.setCapabilitySupport(Capability.QUERY_FROM_JOIN_OUTER, false);
    	capFinder.addCapabilities("pm1", bsc); //$NON-NLS-1$
    	HardcodedDataManager dataManager = new HardcodedDataManager();
    	
    	dataManager.addData("SELECT g_0.e1 AS c_0, COUNT(g_0.e2) AS c_1 FROM pm1.g1 AS g_0 GROUP BY g_0.e1 ORDER BY c_0", //$NON-NLS-1$ 
    			new List[] {
    				 //$NON-NLS-1$
    			});
    	dataManager.addData("SELECT g_0.e1 AS c_0 FROM pm1.g2 AS g_0 ORDER BY c_0", //$NON-NLS-1$ 
    			new List[] { //$NON-NLS-1$
    			});
    	
    	ProcessorPlan plan = helpGetPlan(command, RealMetadataFactory.example1Cached(), capFinder);
    	
    	List[] expected = new List[] { 
                Arrays.asList(0) //$NON-NLS-1$
            };    
    	
    	helpProcess(plan, dataManager, expected);
    }
	
	@Test public void testCountOfGroupingColumn() {
    	Command command = helpParse("select e1, count(e1) from pm1.g1, (select 1 from pm1.g2 limit 2) x group by e1"); //$NON-NLS-1$
    	
    	FakeCapabilitiesFinder capFinder = new FakeCapabilitiesFinder();
    	BasicSourceCapabilities bsc = TestOptimizer.getTypicalCapabilities();
    	capFinder.addCapabilities("pm1", bsc); //$NON-NLS-1$
    	HardcodedDataManager dataManager = new HardcodedDataManager();
    	
    	dataManager.addData("SELECT g_0.e1 FROM pm1.g1 AS g_0", //$NON-NLS-1$ 
    			new List[] {
    			Arrays.asList("a"),
    			Arrays.asList("a"),
    			Arrays.asList("b"),
    				 //$NON-NLS-1$
    			});
    	dataManager.addData("SELECT 1 FROM pm1.g2 AS g_0", //$NON-NLS-1$ 
    			new List[] { //$NON-NLS-1$
    			Arrays.asList(1),
    			Arrays.asList(1),
    			});
    	
    	ProcessorPlan plan = helpGetPlan(command, RealMetadataFactory.example1Cached(), capFinder);
    	
    	List[] expected = new List[] { 
                Arrays.asList("a", 4), //$NON-NLS-1$
                Arrays.asList("b", 2) //$NON-NLS-1$
            };    
    	
    	helpProcess(plan, dataManager, expected);
    }

	@Test public void testUnaliasedViewAgg() throws Exception {
		String sql = "SELECT MIN(x.count) FROM agg x"; //$NON-NLS-1$

		TransformationMetadata metadata = RealMetadataFactory.fromDDL("create foreign table smalla (intkey integer); create view agg (count integer) as select count(*) from smalla", "x", "y");
		
		TestOptimizer.helpPlan(sql, metadata, new String[] {"SELECT MIN(v_0.c_0) FROM (SELECT COUNT(*) AS c_0 FROM y.smalla AS g_0) AS v_0"}, TestAggregatePushdown.getAggregatesFinder(), ComparisonMode.EXACT_COMMAND_STRING);
	}
	
	@Test public void testStringAgg() throws Exception {
		// Create query
		String sql = "SELECT string_agg(e1, ',') from pm1.g1 group by e3"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList("a,b,a"),
				Arrays.asList("a,c"),
		};

		FakeDataManager dataManager = new FakeDataManager();
		sampleData1(dataManager);
		
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached(), TestAggregatePushdown.getAggregatesFinder());
		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testStringAggBinary() throws Exception {
		// Create query
		String sql = "SELECT cast(string_agg(to_bytes(e1, 'UTF-8'), X'AB') as varbinary) from pm1.g1 group by e3"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(new BinaryType(new byte[] {(byte)0x61, (byte)0xAB, (byte)0x62, (byte)0xAB, (byte)0x61})),
				Arrays.asList(new BinaryType(new byte[] {(byte)0x61, (byte)0xAB, (byte)0x63})),
		};

		FakeDataManager dataManager = new FakeDataManager();
		sampleData1(dataManager);
		
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached(), TestAggregatePushdown.getAggregatesFinder());
		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testCorrelatedGroupingColumn() throws Exception {
		// Create query
		String sql = "SELECT A.e2, A.e1 FROM pm1.g1 AS A GROUP BY A.e2, A.e1 HAVING A.e1 = (SELECT MAX(B.e1) FROM pm1.g1 AS B WHERE A.e2 = B.e2)"; //$NON-NLS-1$

		// Create expected results
		List[] expected = new List[] {
				Arrays.asList(new Object[] { 0, "a" }),
				Arrays.asList(new Object[] { 1, "c" }),
				Arrays.asList(new Object[] { 2, "b" }),
				Arrays.asList(new Object[] { 3, "a" })};

		// Construct data manager with data
		FakeDataManager dataManager = new FakeDataManager();
		FakeDataStore.sampleData1(dataManager, RealMetadataFactory.example1Cached());

		// Plan query
		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());

		// Run query
		helpProcess(plan, dataManager, expected);
	}
	
	@Test public void testRollup() throws Exception {
		String sql = "select e1, sum(e2) from pm1.g1 group by rollup(e1)"; //$NON-NLS-1$

		List[] expected = new List[] {
				Arrays.asList("a", Long.valueOf(3)),
				Arrays.asList("b", Long.valueOf(1)),
				Arrays.asList(null, Long.valueOf(4))
				};

		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());

		HardcodedDataManager hdm = new HardcodedDataManager();
		hdm.addData("SELECT pm1.g1.e1, pm1.g1.e2 FROM pm1.g1", Arrays.asList("a", 1), Arrays.asList("a", 2), Arrays.asList("b", 1));
		helpProcess(plan, hdm, expected);
		
		expected = new List[] {
				Arrays.asList("a", Long.valueOf(4)),
				Arrays.asList(null, Long.valueOf(4))
				};

		plan.close();
		plan.reset();

		hdm = new HardcodedDataManager();
		hdm.addData("SELECT pm1.g1.e1, pm1.g1.e2 FROM pm1.g1", Arrays.asList("a", 1), Arrays.asList("a", 3));
		helpProcess(plan, hdm, expected);
	}
	
	@Test public void testRollupHaving() throws Exception {
		String sql = "select e1, sum(e2) from pm1.g1 group by rollup(e1) having e1 is not null"; //$NON-NLS-1$

		List[] expected = new List[] {
				Arrays.asList("a", Long.valueOf(3)),
				Arrays.asList("b", Long.valueOf(1))
				};

		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());

		HardcodedDataManager hdm = new HardcodedDataManager();
		hdm.addData("SELECT pm1.g1.e1, pm1.g1.e2 FROM pm1.g1", Arrays.asList("a", 1), Arrays.asList("a", 2), Arrays.asList("b", 1));
		helpProcess(plan, hdm, expected);
	}
	
	@Test public void testRollup2() throws Exception {
		String sql = "select e1, e2, sum(e4) from pm1.g1 group by rollup(e1, e2)"; //$NON-NLS-1$

		List[] expected = new List[] {
				Arrays.asList("a", 1, 1.0),
				Arrays.asList("a", 3, 2.0),
			    Arrays.asList("a", null, 3.0),
				Arrays.asList("b", 2, 3.0),
				Arrays.asList("b", 4, 4.0),
				Arrays.asList("b", null, 7.0),
				Arrays.asList(null, null, 10.0),
				};

		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());

		HardcodedDataManager hdm = new HardcodedDataManager();
		hdm.addData("SELECT pm1.g1.e1, pm1.g1.e2, pm1.g1.e4 FROM pm1.g1", Arrays.asList("a", 1, 1.0), Arrays.asList("a", 3, 2.0), Arrays.asList("b", 2, 3.0), Arrays.asList("b", 4, 4.0));
		helpProcess(plan, hdm, expected);
		
		plan.close();
		plan.reset();
		
		//an empty rollup should produce no rows
		hdm = new HardcodedDataManager();
		hdm.addData("SELECT pm1.g1.e1, pm1.g1.e2, pm1.g1.e4 FROM pm1.g1");
		helpProcess(plan, hdm, new List<?>[0]);
	}
	
	@Test public void testRollup3() throws Exception {
		String sql = "select e1, e2, e3, sum(e4) from pm1.g1 group by rollup(e1, e2, e3)"; //$NON-NLS-1$

		List[] expected = new List[] {
				Arrays.asList("a", 1, true, 3.0),
				Arrays.asList("a", 1, null, 3.0),
			    Arrays.asList("a", null, null, 3.0),
				Arrays.asList("b", 2, false, 7.0),
				Arrays.asList("b", 2, null, 7.0),
				Arrays.asList("b", null, null, 7.0),
				Arrays.asList(null, null, null, 10.0),
				};

		ProcessorPlan plan = helpGetPlan(sql, RealMetadataFactory.example1Cached());

		HardcodedDataManager hdm = new HardcodedDataManager();
		hdm.addData("SELECT pm1.g1.e1, pm1.g1.e2, pm1.g1.e3, pm1.g1.e4 FROM pm1.g1", Arrays.asList("a", 1, Boolean.TRUE, 1.0), Arrays.asList("a", 1, Boolean.TRUE, 2.0), Arrays.asList("b", 2, Boolean.FALSE, 3.0), Arrays.asList("b", 2, Boolean.FALSE, 4.0));
		helpProcess(plan, hdm, expected);
	}
	
	@Test public void testAggregateNVL() throws Exception {
        String sql = "select count(x.e2), nvl(x.e1, '') from pm1.g1 x makedep, pm2.g2 where x.e3 = pm2.g2.e3 group by nvl(x.e1, '')"; //$NON-NLS-1$

        List[] expected = new List[] {
        		Arrays.asList(1, "a"),
		};

		HardcodedDataManager dataManager = new HardcodedDataManager();
		dataManager.addData("SELECT g_0.e3 AS c_0 FROM pm2.g2 AS g_0 ORDER BY c_0", new List[] {
				Arrays.asList(1.0),
		});
		dataManager.addData("SELECT v_0.c_0, v_0.c_1, COUNT(v_0.c_2) FROM (SELECT g_0.e3 AS c_0, ifnull(g_0.e1, '') AS c_1, g_0.e2 AS c_2 FROM pm1.g1 AS g_0 WHERE g_0.e3 IN (<dependent values>)) AS v_0 GROUP BY v_0.c_0, v_0.c_1", new List[] {
				Arrays.asList(1.0, "a", 1)
		});
		BasicSourceCapabilities capabilities = TestAggregatePushdown.getAggregateCapabilities();
		capabilities.setFunctionSupport("ifnull", true);
		CommandContext cc = createCommandContext();
		ProcessorPlan plan = helpGetPlan(helpParse(sql), RealMetadataFactory.example1Cached(), new DefaultCapabilitiesFinder(capabilities), cc);
		helpProcess(plan, cc, dataManager, expected);
	}
	
	@Test public void testSelectAllWithGrouping() {
    	Command command = helpParse("select * from (select pm1.g1.e1 x, pm2.g2.e1 y from pm1.g1, pm2.g2) z group by x, y"); //$NON-NLS-1$
    	
    	FakeCapabilitiesFinder capFinder = new FakeCapabilitiesFinder();
    	capFinder.addCapabilities("pm1", TestAggregatePushdown.getAggregateCapabilities()); //$NON-NLS-1$
    	capFinder.addCapabilities("pm2", TestOptimizer.getTypicalCapabilities()); //$NON-NLS-1$
    	HardcodedDataManager dataManager = new HardcodedDataManager();
    	
    	dataManager.addData("SELECT g_0.e1 FROM pm1.g1 AS g_0 GROUP BY g_0.e1", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList("a"), //$NON-NLS-1$
    			});
    	dataManager.addData("SELECT g_0.e1 FROM pm2.g2 AS g_0", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList("b"), //$NON-NLS-1$
    			});
    	
    	ProcessorPlan plan = helpGetPlan(command, RealMetadataFactory.example1Cached(), capFinder);
    	
    	List[] expected = new List[] { 
                Arrays.asList("a", "b"),
            };    
    	
    	helpProcess(plan, dataManager, expected);
    }
	
	//TODO: the rewriter may need to correct this case, but at least the grouping node can
	//now handle it
	@Test public void testDuplicateGroupBy() {
    	Command command = helpParse("select e2 from pm1.g1 group by e2, e2"); //$NON-NLS-1$
    	
    	CapabilitiesFinder capFinder = TestOptimizer.getGenericFinder();
    	HardcodedDataManager dataManager = new HardcodedDataManager();
    	
    	dataManager.addData("SELECT g_0.e2 FROM pm1.g1 AS g_0", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList(1), //$NON-NLS-1$
    				Arrays.asList(2), //$NON-NLS-1$
    				Arrays.asList(2), //$NON-NLS-1$
    			});
    	
    	ProcessorPlan plan = helpGetPlan(command, RealMetadataFactory.example1Cached(), capFinder);
    	
    	List[] expected = new List[] { 
                Arrays.asList(1),
                Arrays.asList(2),
            };    
    	
    	helpProcess(plan, dataManager, expected);
    }
	
    @Test public void testSidewaysCorrelationBelowAggregation() throws Exception {
    	String sql = "select e1 from (SELECT sc.e1 FROM pm1.g1 sc, table(exec pm1.vsp21(sc.e2+1) ) as f ) as x group by e1";
    	
    	Command command = helpParse(sql); //$NON-NLS-1$
    	
    	CapabilitiesFinder capFinder = TestOptimizer.getGenericFinder();
    	HardcodedDataManager dataManager = new HardcodedDataManager();
    	
    	dataManager.addData("SELECT g_0.e2, g_0.e1 FROM pm1.g1 AS g_0", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList(1, "1"), //$NON-NLS-1$
    				Arrays.asList(2, "2"), //$NON-NLS-1$
    			});
    	
    	dataManager.addData("SELECT g_0.e1, g_0.e2 FROM pm1.g1 AS g_0", //$NON-NLS-1$ 
    			new List[] {
    				Arrays.asList("2", 2), //$NON-NLS-1$
    			});
    	
    	ProcessorPlan plan = helpGetPlan(command, RealMetadataFactory.example1Cached(), capFinder);
    	
    	List[] expected = new List[] { 
                Arrays.asList("1"),
                Arrays.asList("2"),
            };    
    	
    	helpProcess(plan, dataManager, expected);
    }
    
	@Test public void testBigIntegerSum() throws Exception {
		String sql = "SELECT sum(x) FROM agg x"; //$NON-NLS-1$

		TransformationMetadata metadata = RealMetadataFactory.fromDDL("create foreign table agg (x biginteger)", "x", "y");
		HardcodedDataManager hdm = new HardcodedDataManager();
		hdm.addData("SELECT y.agg.x FROM y.agg", Arrays.asList(BigInteger.valueOf(1)));
		ProcessorPlan plan = TestProcessor.helpGetPlan(sql, metadata);
		TestProcessor.helpProcess(plan, hdm, new List[] {Arrays.asList(BigInteger.valueOf(1))});
	}

	
}
