[ADQL] Fix handling of delimited column references (e.g. items of ORDER BY).

This error has been raised on the issue #32 by Zarquan.

src/adql/db/DBChecker.java

@@ -16,7 +16,7 @@ package adql.db;
  * You should have received a copy of the GNU Lesser General Public License
  * along with ADQLLibrary.  If not, see <http://www.gnu.org/licenses/>.
  * 
- * Copyright 2011-2016 - UDS/Centre de Données astronomiques de Strasbourg (CDS),
+ * Copyright 2011-2017 - UDS/Centre de Données astronomiques de Strasbourg (CDS),
  *                       Astronomisches Rechen Institut (ARI)
  */
 
@@ -97,7 +97,7 @@ import adql.search.SimpleSearchHandler;
  * </i></p>
  * 
  * @author Gr&eacute;gory Mantelet (CDS;ARI)
- * @version 1.4 (03/2016)
+ * @version 1.4 (03/2017)
  */
 public class DBChecker implements QueryChecker {
 
@@ -723,18 +723,16 @@ public class DBChecker implements QueryChecker {
 			}else
 				throw new ParseException("Column index out of bounds: " + index + " (must be between 1 and " + select.size() + ") !", colRef.getPosition());
 		}else{
-			ADQLColumn col = new ADQLColumn(colRef.getColumnName());
+			ADQLColumn col = new ADQLColumn(null, colRef.getColumnName());
 			col.setCaseSensitive(colRef.isCaseSensitive());
 			col.setPosition(colRef.getPosition());
 
 			// search among the select_item aliases:
-			if (col.getTableName() == null){
 			ArrayList<SelectItem> founds = select.searchByAlias(colRef.getColumnName(), colRef.isCaseSensitive());
 			if (founds.size() == 1)
 				return null;
 			else if (founds.size() > 1)
 				throw new UnresolvedColumnException(col, founds.get(0).getAlias(), founds.get(1).getAlias());
-			}
 
 			// check the corresponding column:
 			return resolveColumn(col, dbColumns, null);

test/adql/db/TestDBChecker.java

@@ -32,6 +32,7 @@ import adql.query.operand.function.DefaultUDF;
 import adql.query.operand.function.UserDefinedFunction;
 import adql.search.SimpleSearchHandler;
 import adql.translator.ADQLTranslator;
+import adql.translator.PostgreSQLTranslator;
 import adql.translator.TranslationException;
 
 public class TestDBChecker {
@@ -135,6 +136,22 @@ public class TestDBChecker {
 		}catch(ParseException pe){}
 	}
 
+	@Test
+	public void testColRefWithDottedAlias(){
+		ADQLParser parser = new ADQLParser(new DBChecker(tables));
+		try{
+			ADQLQuery adql = parser.parseQuery("SELECT colI AS \"col.I\" FROM aschema.foo ORDER BY \"col.I\"");
+			assertNotNull(adql);
+			assertEquals("SELECT \"aschema\".\"foo\".\"colI\" AS \"col.I\"\nFROM \"aschema\".\"foo\"\nORDER BY \"col.I\" ASC", (new PostgreSQLTranslator()).translate(adql));
+		}catch(ParseException pe){
+			pe.printStackTrace();
+			fail();
+		}catch(TranslationException te){
+			te.printStackTrace();
+			fail();
+		}
+	}
+
 	@Test
 	public void testNumericOrStringValueExpressionPrimary(){
 		ADQLParser parser = new ADQLParser();