Examples with DerivedColumn org.teiid.language.DerivedColumn used on opensource projects

Example 11 with DerivedColumn

use of org.teiid.language.DerivedColumn in project teiid by teiid.

the class HsqlExecutionFactory method translateCommand.

@Override
public List<?> translateCommand(Command command, ExecutionContext context) {
    if (command instanceof Select) {
        Select select = (Select) command;
        if (select.getFrom() == null || select.getFrom().isEmpty()) {
            List<Object> result = new ArrayList<Object>();
            // $NON-NLS-1$
            result.add("VALUES(");
            for (int i = 0; i < select.getDerivedColumns().size(); i++) {
                DerivedColumn dc = select.getDerivedColumns().get(i);
                if (i != 0) {
                    // $NON-NLS-1$
                    result.add(", ");
                }
                result.add(dc.getExpression());
            }
            // $NON-NLS-1$
            result.add(")");
            return result;
        }
    }
    return super.translateCommand(command, context);
}

Example 12 with DerivedColumn

use of org.teiid.language.DerivedColumn in project teiid by teiid.

the class TestQueryImpl method testGetSelectSymbols.

public void testGetSelectSymbols() throws Exception {
    List symbols = example(false).getDerivedColumns();
    assertNotNull(symbols);
    assertEquals(4, symbols.size());
    for (Iterator i = symbols.iterator(); i.hasNext(); ) {
        assertTrue(i.next() instanceof DerivedColumn);
    }
}

Example 13 with DerivedColumn

use of org.teiid.language.DerivedColumn in project teiid by teiid.

the class TestSelectSymbolImpl method testGetColumnDataTypes.

public void testGetColumnDataTypes() {
    Class<?>[] expectedResults = new Class[2];
    List<DerivedColumn> symbols = new ArrayList<DerivedColumn>();
    // $NON-NLS-1$//$NON-NLS-2$
    symbols.add(new DerivedColumn("c1", new Literal("3", DataTypeManager.DefaultDataClasses.STRING)));
    expectedResults[0] = DataTypeManager.DefaultDataClasses.STRING;
    // $NON-NLS-1$
    symbols.add(new DerivedColumn("c2", new Literal(new Integer(5), DataTypeManager.DefaultDataClasses.INTEGER)));
    expectedResults[1] = DataTypeManager.DefaultDataClasses.INTEGER;
    Select query = new Select(symbols, false, null, null, null, null, null);
    Class<?>[] results = query.getColumnTypes();
    assertEquals(results[0], expectedResults[0]);
    assertEquals(results[1], expectedResults[1]);
}

Example 14 with DerivedColumn

use of org.teiid.language.DerivedColumn in project teiid by teiid.

the class TestMetadataObject method getElementID.

// ################ TEST ELEMENT METADATAID ######################
public Column getElementID(String groupName, String elementName, TranslationUtility transUtil) {
    // $NON-NLS-1$ //$NON-NLS-2$
    Select query = (Select) transUtil.parseCommand("SELECT " + elementName + " FROM " + groupName);
    DerivedColumn symbol = query.getDerivedColumns().get(0);
    ColumnReference element = (ColumnReference) symbol.getExpression();
    return element.getMetadataObject();
}