Package org.teiid.query.processor.relational

Source Code of org.teiid.query.processor.relational.TestSelectNode

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* Lesser General Public License for more details.
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package org.teiid.query.processor.relational;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.junit.Test;
import org.teiid.common.buffer.BlockedException;
import org.teiid.common.buffer.BufferManager;
import org.teiid.common.buffer.BufferManagerFactory;
import org.teiid.common.buffer.TupleBatch;
import org.teiid.core.TeiidComponentException;
import org.teiid.core.TeiidProcessingException;
import org.teiid.core.types.DataTypeManager;
import org.teiid.query.eval.Evaluator;
import org.teiid.query.function.FunctionDescriptor;
import org.teiid.query.processor.BatchIterator;
import org.teiid.query.processor.FakeDataManager;
import org.teiid.query.processor.ProcessorDataManager;
import org.teiid.query.processor.QueryProcessor;
import org.teiid.query.sql.lang.CompareCriteria;
import org.teiid.query.sql.lang.Criteria;
import org.teiid.query.sql.symbol.Constant;
import org.teiid.query.sql.symbol.ElementSymbol;
import org.teiid.query.sql.symbol.Expression;
import org.teiid.query.sql.symbol.Function;
import org.teiid.query.unittest.FakeMetadataFactory;
import org.teiid.query.util.CommandContext;

public class TestSelectNode {

    public void helpTestSelect(List elements, Criteria criteria, List[] data, List childElements, ProcessorDataManager dataMgr, List[] expected) throws TeiidComponentException, TeiidProcessingException {
      helpTestSelect(elements, criteria, childElements, dataMgr, expected, new FakeRelationalNode(2, data));
    }
   
    public void helpTestSelect(List elements, Criteria criteria, List childElements, ProcessorDataManager dataMgr, List[] expected, RelationalNode child) throws TeiidComponentException, TeiidProcessingException {
        SelectNode selectNode = new SelectNode(1);
        helpTestSelect(elements, criteria, childElements, dataMgr, expected, child, selectNode);
    }

  private void helpTestSelect(List elements, Criteria criteria, List childElements,
      ProcessorDataManager dataMgr, List[] expected,
      RelationalNode child,
      SelectNode selectNode) throws TeiidComponentException,
      TeiidProcessingException {
    BufferManager mgr = BufferManagerFactory.getStandaloneBufferManager();
        CommandContext context = new CommandContext("pid", "test", null, null, 1);               //$NON-NLS-1$ //$NON-NLS-2$
       
        child.setElements(childElements);
        child.initialize(context, mgr, dataMgr);
    selectNode.setCriteria(criteria);
        selectNode.setElements(elements);
        selectNode.addChild(child);
        selectNode.initialize(context, mgr, dataMgr);
       
        selectNode.open();
       
        BatchIterator iterator = new BatchIterator(selectNode);
       
        for (int i = 0; i < expected.length; i++) {
          while (true) {
            try {
              assertEquals("Rows don't match at " + i, expected[i], iterator.nextTuple()); //$NON-NLS-1$
              break;
            } catch (BlockedException e) {
              continue;
            } catch (QueryProcessor.ExpiredTimeSliceException e) {
              continue;
            }
          }
    } 
        assertFalse(iterator.hasNext());
  }
   
    /**
     * Ensures that a final empty batch is reindexed so that the batch iterator works correctly
     */
    @Test public void testEmptyBatchIndexing() throws TeiidComponentException, TeiidProcessingException {
      ElementSymbol es1 = new ElementSymbol("e1"); //$NON-NLS-1$
        es1.setType(DataTypeManager.DefaultDataClasses.INTEGER);

        List elements = new ArrayList();
        elements.add(es1);
       
        CompareCriteria crit = new CompareCriteria(new Constant(0), CompareCriteria.EQ, new Constant(new Integer(1)));
       
        List childElements = new ArrayList();
        childElements.add(es1);
       
      RelationalNode child = new RelationalNode(0) {
        int i = 0;
       
      @Override
      public Object clone() {
        return null;
      }

      @Override
      protected TupleBatch nextBatchDirect() throws BlockedException,
          TeiidComponentException, TeiidProcessingException {
        if (i++ == 0) {
          return new TupleBatch(1, new List[] {Arrays.asList(1), Arrays.asList(1)});
        }
        TupleBatch batch = new TupleBatch(3, new List[0] );
        batch.setTerminationFlag(true);
        return batch;
      }
       
      };
     
      helpTestSelect(elements, crit, childElements, null, new List[0], child);
    }
   
    @Test public void testTimeslicing() throws TeiidComponentException, TeiidProcessingException {
        ElementSymbol es1 = new ElementSymbol("e1"); //$NON-NLS-1$
        es1.setType(DataTypeManager.DefaultDataClasses.INTEGER);

        List elements = new ArrayList();
        elements.add(es1);
       
        CompareCriteria crit = new CompareCriteria(es1, CompareCriteria.EQ, new Constant(new Integer(1)));
       
        List[] data = new List[] {
          Arrays.asList(1),
          Arrays.asList(1),
          Arrays.asList(1)
        };
       
        List childElements = new ArrayList();
        childElements.add(es1);
       
        helpTestSelect(elements, crit, childElements, null, data, new FakeRelationalNode(2, data), new SelectNode(3) {
          int i = 0;
         
          @Override
          protected Evaluator getEvaluator(Map elementMap) {
            if (i++ == 1) {
              throw new QueryProcessor.ExpiredTimeSliceException();
            }
            return super.getEvaluator(elementMap);
          }
        });
    }
   
    @Test public void testNoRows() throws TeiidComponentException, TeiidProcessingException {
        ElementSymbol es1 = new ElementSymbol("e1"); //$NON-NLS-1$
        es1.setType(DataTypeManager.DefaultDataClasses.INTEGER);

        ElementSymbol es2 = new ElementSymbol("e2"); //$NON-NLS-1$
        es2.setType(DataTypeManager.DefaultDataClasses.STRING);
       
        List elements = new ArrayList();
        elements.add(es1);
       
        List[] data = new List[0];
       
        CompareCriteria crit = new CompareCriteria(es1, CompareCriteria.EQ, new Constant(new Integer(1)));
       
        List childElements = new ArrayList();
        childElements.add(es1);
        childElements.add(es2);
       
        helpTestSelect(elements, crit, data, childElements, null, data);
       
    }

    @Test public void testSimpleSelect() throws TeiidComponentException, TeiidProcessingException {
        ElementSymbol es1 = new ElementSymbol("e1"); //$NON-NLS-1$
        es1.setType(DataTypeManager.DefaultDataClasses.INTEGER);

        ElementSymbol es2 = new ElementSymbol("e2"); //$NON-NLS-1$
        es2.setType(DataTypeManager.DefaultDataClasses.STRING);
       
        List elements = new ArrayList();
        elements.add(es1);
       
        CompareCriteria crit = new CompareCriteria(es1, CompareCriteria.EQ, new Constant(new Integer(1)));
       
        List[] data = new List[20];
        for(int i=0; i<20; i++) {
            data[i] = new ArrayList();
            data[i].add(new Integer((i*51) % 11));
           
            String str = "" + (i*3); //$NON-NLS-1$
            str = str.substring(0,1);
            data[i].add(str);             
        }
       
        List childElements = new ArrayList();
        childElements.add(es1);
        childElements.add(es2);

        List[] expected = new List[] {
            Arrays.asList(new Object[] { new Integer(1) }),           
            Arrays.asList(new Object[] { new Integer(1) })                     
        };
       
        helpTestSelect(elements, crit, data, childElements, null, expected);

    }

    @Test public void testSelectWithLookup() throws TeiidComponentException, TeiidProcessingException {
        ElementSymbol es1 = new ElementSymbol("e1"); //$NON-NLS-1$
        es1.setType(DataTypeManager.DefaultDataClasses.INTEGER);

        ElementSymbol es2 = new ElementSymbol("e2"); //$NON-NLS-1$
        es2.setType(DataTypeManager.DefaultDataClasses.STRING);
       
        List elements = new ArrayList();
        elements.add(es1);

        Function func = new Function("lookup", new Expression[] { new Constant("pm1.g1"), new Constant("e2"), new Constant("e1"), es1 }); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
        FunctionDescriptor desc = FakeMetadataFactory.SFM.getSystemFunctionLibrary().findFunction("lookup", new Class[] { String.class, String.class, String.class, Integer.class } ); //$NON-NLS-1$
        func.setFunctionDescriptor(desc);
        func.setType(DataTypeManager.DefaultDataClasses.INTEGER);
        CompareCriteria crit = new CompareCriteria(func, CompareCriteria.EQ, new Constant(new Integer(1)));
       
        List[] data = new List[20];
        for(int i=0; i<20; i++) {
            data[i] = new ArrayList();
            data[i].add(new Integer((i*51) % 11));
           
            String str = "" + (i*3); //$NON-NLS-1$
            str = str.substring(0,1);
            data[i].add(str);             
        }
       
        List childElements = new ArrayList();
        childElements.add(es1);
        childElements.add(es2);

        List[] expected = new List[] {
            Arrays.asList(new Object[] { new Integer(0) }),           
            Arrays.asList(new Object[] { new Integer(0) })                     
        };
       
        FakeDataManager dataMgr = new FakeDataManager();
        dataMgr.setThrowBlocked(true);
        Map valueMap = new HashMap();
        valueMap.put(new Integer(0), new Integer(1));
        valueMap.put(new Integer(1), new Integer(2));
        dataMgr.defineCodeTable("pm1.g1", "e1", "e2", valueMap); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$

        helpTestSelect(elements, crit, data, childElements, dataMgr, expected);

    }   
}
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