Examples of ExpressionSymbol

org.teiid.query.sql.symbol.ExpressionSymbol

This is a subclass of Symbol representing an expression in the SELECT clause. The expression may be a constant, function, or scalar subquery. The name of this symbol is always generated and typically should not be displayed. If necessary, the ExpressionSymbol may be wrapped by an AliasSymbol to register the name in a query. The definition of the symbol is the functional expression. Resolution will produce a list of groups and elements used by the expression.

Examples of org.teiid.query.sql.symbol.ExpressionSymbol

        if (exists.getCommand().getProcessorPlan() == null) {
          if (exists.getCommand() instanceof Query) {
          Query query = (Query)exists.getCommand();
          if ((query.getLimit() == null || query.getOrderBy() == null) && query.getSelect().getProjectedSymbols().size() > 1) {
            query.getSelect().clearSymbols();
            query.getSelect().addSymbol(new ExpressionSymbol("x", new Constant(1))); //$NON-NLS-1$
          }
        }
              addImplicitLimit(exists, 1);
        }
    } else if (criteria instanceof SubquerySetCriteria) {

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Examples of org.teiid.query.sql.symbol.ExpressionSymbol

        }
      }
      if ((expression.getAggregateFunction() == Type.MAX || expression.getAggregateFunction() == Type.MIN)
        && EvaluatableVisitor.willBecomeConstant(expression.getExpression())) {
      try {
        return new ExpressionSymbol(expression.getName(), ResolverUtil
            .convertExpression(expression.getExpression(),DataTypeManager.getDataTypeName(expression.getType()), metadata));
      } catch (QueryResolverException e) {
        //should not happen, so throw as a runtime
        throw new TeiidRuntimeException(e);
      }

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Examples of org.teiid.query.sql.symbol.ExpressionSymbol

    for (SetClause clause : update.getChangeList().getClauses()) {
      Expression ex = clause.getValue();
      SingleElementSymbol selectSymbol = null;
      if (!EvaluatableVisitor.willBecomeConstant(ex)) {
        if (!(ex instanceof SingleElementSymbol)) {
          selectSymbol = new ExpressionSymbol("expr", ex); //$NON-NLS-1$
        } else {
          selectSymbol = (SingleElementSymbol)ex;
        }
        selectSymbols.add(new AliasSymbol("s_" +i, selectSymbol)); //$NON-NLS-1$
        ex = new ElementSymbol("s_" +i); //$NON-NLS-1$

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Examples of org.teiid.query.sql.symbol.ExpressionSymbol

        validateSortable(groupBySymbols);
    Iterator symbolIter = groupBySymbols.iterator();
    while(symbolIter.hasNext()) {
            SingleElementSymbol symbol = (SingleElementSymbol)symbolIter.next();
            if(symbol instanceof ExpressionSymbol) {
                ExpressionSymbol exprSymbol = (ExpressionSymbol) symbol;
                Expression expr = exprSymbol.getExpression();
                if (!ValueIteratorProviderCollectorVisitor.getValueIteratorProviders(expr).isEmpty() || expr instanceof Constant || expr instanceof Reference) {
                  handleValidationError(QueryPlugin.Util.getString("ValidationVisitor.groupby_subquery", expr), expr); //$NON-NLS-1$
                }
            }                
    }

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Examples of org.teiid.query.sql.symbol.ExpressionSymbol

           }
       }
       
         // Otherwise this should be an ExpressionSymbol and we just need to dive in and evaluate the expression itself
         if (expression instanceof ExpressionSymbol && !(expression instanceof AggregateSymbol)) {            
             ExpressionSymbol exprSyb = (ExpressionSymbol) expression;
             Expression expr = exprSyb.getExpression();
             return internalEvaluate(expr, tuple);
         } 
         
         return getContext(expression).getFromContext(expression);
     }

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Examples of org.teiid.query.sql.symbol.ExpressionSymbol


    
    public void testExpressionHashCode() {
        Expression expr1 = new Constant(new Integer(1));
        Expression expr2 = new Constant(new Integer(2));
        ExpressionSymbol symbol1 = new ExpressionSymbol("foo", expr1); //$NON-NLS-1$
        ExpressionSymbol symbol2 = new ExpressionSymbol("bar", expr2); //$NON-NLS-1$
        
        assertFalse(symbol1.hashCode() == symbol2.hashCode());
    }

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Examples of org.teiid.query.sql.symbol.ExpressionSymbol

    }
    
    public void testExpressionHashCode1() {
        Expression expr1 = new Constant(new Integer(1));
        Expression expr2 = new Constant(new Integer(1));
        ExpressionSymbol symbol1 = new ExpressionSymbol("foo", expr1); //$NON-NLS-1$
        ExpressionSymbol symbol2 = new ExpressionSymbol("bar", expr2); //$NON-NLS-1$
        
        assertTrue(symbol1.hashCode() == symbol2.hashCode());
    }

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Examples of org.teiid.query.sql.symbol.ExpressionSymbol




public class TestAliasSymbol extends TestCase {


    public void testAliasEquals() {
        AliasSymbol a1 = new AliasSymbol("X", new ExpressionSymbol("x", new Constant(1))); //$NON-NLS-1$ //$NON-NLS-2$
        AliasSymbol a2 = new AliasSymbol("X", new ExpressionSymbol("x", new Constant(2))); //$NON-NLS-1$ //$NON-NLS-2$
        AliasSymbol a3 = new AliasSymbol("x", new ExpressionSymbol("x", new Constant(1))); //$NON-NLS-1$ //$NON-NLS-2$
        
        assertEquals(a1, a3); //just a different case for the alias
        
        assertFalse(a1.equals(a2)); //different express 
    }

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Examples of org.teiid.query.sql.symbol.ExpressionSymbol

        
        assertFalse(a1.equals(a2)); //different express 
    }
    
    public void testClone() {
        AliasSymbol a1 = new AliasSymbol("X", new ExpressionSymbol("x", new Constant(1))); //$NON-NLS-1$ //$NON-NLS-2$
        a1.setOutputName("foo"); //$NON-NLS-1$
        AliasSymbol clone = (AliasSymbol)a1.clone();
        assertEquals(a1, clone);
        assertEquals(a1.getOutputName(), clone.getOutputName());
    }

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Examples of org.teiid.query.sql.symbol.ExpressionSymbol

    Expression replacement = replaceExpression(expr);
    
    if (replacement instanceof SingleElementSymbol) {
        replacmentSymbol = (SingleElementSymbol)replacement;
    } else {
        replacmentSymbol = new ExpressionSymbol(ses.getShortName(), replacement);
    }
    
    if (alias && createAliases() && !replacmentSymbol.getShortCanonicalName().equals(ses.getShortCanonicalName())) {
        replacmentSymbol = new AliasSymbol(ses.getShortName(), replacmentSymbol);
    }

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