Add support for Hive

src/qir/driver/DBDriver.java

@@ -5,6 +5,7 @@ import java.util.Map;
 import qir.ast.*;
 import qir.ast.data.*;
 import qir.driver.hbase.HBaseDriver;
+import qir.driver.sql.QIRHiveDriver;
 import qir.driver.sql.OracleDriver;
 import qir.driver.sql.PostgreSQLDriver;
 import qir.util.QIRException;
@@ -49,6 +50,9 @@ public abstract class DBDriver<DBRepr> {
             case "PostgreSQL":
                 result = new PostgreSQLDriver(fileName);
                 break;
+            case "Hive":
+                result = new QIRHiveDriver(fileName);
+                break;
             case "HBase":
                 result = new HBaseDriver(fileName);
                 break;

src/qir/driver/sql/QIRHiveDriver.java

+package qir.driver.sql;
+
+import java.sql.*;
+
+import qir.util.QIRException;
+
+/**
+ * {@link QIRHiveDriver} is an intermediate between QIR and a PostgreSQL database.
+ */
+public final class QIRHiveDriver extends SQLStringDriver {
+    public QIRHiveDriver(final String newConfigFile) {
+        super(newConfigFile);
+    }
+
+    @Override
+    public final void openConnection(final String newConfigFile) throws QIRException {
+        try {
+            super.openConnection(newConfigFile);
+            conn = DriverManager.getConnection("jdbc:hive2://" + config.serverName + ":" + config.portNumber + "/" + config.sid, "hive", "");
+        } catch (final SQLException e) {
+            e.printStackTrace();
+            throw new QIRException("Could not open connection to Hive database: " + config.serverName);
+        }
+    }
+}
\ No newline at end of file

src/qir/driver/sql/SQLStringDriver.java

@@ -93,7 +93,7 @@ abstract class SQLStringDriver extends SQLDriver<String> {
                             data = new QIRString(null, rs.getString(i));
                             break;
                     }
-                    newTuple = new QIRTcons(null, rs.getMetaData().getColumnLabel(i), data, newTuple);
+                    newTuple = new QIRTcons(null, rs.getMetaData().getColumnLabel(i).replaceFirst(".*\\.", ""), data, newTuple);
                 }
                 tmp.push(newTuple);
             }