From dca7552d8b2d40bcf16c5f220b33db784bc3ad0a Mon Sep 17 00:00:00 2001
From: William Rogers <rogers.wb@gmail.com>
Date: Fri, 22 May 2015 16:30:13 -0500
Subject: [PATCH] Implemented SQL_DESC_UNSIGNED attribute in SQLColAttributes

---
 src/odbc/odbc.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/odbc/odbc.c b/src/odbc/odbc.c
index 1198de4..86f8bd0 100644
--- a/src/odbc/odbc.c
+++ b/src/odbc/odbc.c
@@ -939,6 +939,21 @@ static SQLRETURN SQL_API _SQLColAttributes(
 		case SQL_COLUMN_DISPLAY_SIZE: /* =SQL_DESC_DISPLAY_SIZE */
 			*pfDesc = mdb_col_disp_size(col);
 			break;
+        case SQL_DESC_UNSIGNED:
+			switch(col->col_type) {
+				case MDB_INT:
+				case MDB_LONGINT:
+				case MDB_FLOAT:
+				case MDB_DOUBLE:
+				case MDB_NUMERIC:
+					*pfDesc = SQL_FALSE;
+					break;
+				case MDB_BYTE:
+				default: // Everything else returns true per MSDN
+					*pfDesc = SQL_TRUE;
+					break;
+			}
+			break;
 		default:
 			strcpy(sqlState, "HYC00"); // 	Driver not capable
 			ret = SQL_ERROR;