Add support for bigint and null for sql

src/qir/driver/sql/SQLStringDriver.java

@@ -13,6 +13,7 @@ import java.util.Base64;
 import java.util.Deque;
 
 import qir.ast.QIRNode;
+import qir.ast.QIRNull;
 import qir.ast.data.QIRLcons;
 import qir.ast.data.QIRList;
 import qir.ast.data.QIRLnil;
@@ -56,6 +57,7 @@ public abstract class SQLStringDriver extends SQLDriver<String> {
                     switch (type) {
                         case Types.INTEGER:
                         case Types.NUMERIC:
+                        case Types.BIGINT:
                             data = new QIRNumber(null, rs.getLong(i));
                             break;
                         case Types.BOOLEAN:
@@ -64,6 +66,9 @@ public abstract class SQLStringDriver extends SQLDriver<String> {
                         case Types.DOUBLE:
                             data = new QIRDouble(null, rs.getDouble(i));
                             break;
+                        case Types.NULL:
+                            data = QIRNull.getInstance();
+                            break;
                         case Types.OTHER:
                             String v = rs.getString(i);
                             v = v.substring(1, v.length() - 1);