--- plugin/innodb_memcached/innodb_memcache/src/innodb_api.c
+++ plugin/innodb_memcached/innodb_memcache/src/innodb_api.c
@@ -274,7 +274,7 @@
 	uint64_t	value64;
 
 	assert (m_col->type == IB_INT && m_col->type_len == sizeof(uint64_t)
-		&& m_col->attr == IB_COL_UNSIGNED);
+		&& m_col->attr & IB_COL_UNSIGNED);
 
 	ib_cb_tuple_read_u64(read_tpl, i, &value64);
 
@@ -301,7 +301,7 @@
 		|| m_col->type_len == sizeof(uint16_t)
 		|| m_col->type_len == sizeof(uint8_t));
 
-	if (m_col->attr == IB_COL_UNSIGNED) {
+	if (m_col->attr & IB_COL_UNSIGNED) {
 		if (m_col->type_len == sizeof(uint64_t)) {
 			/* We handle uint64 in innodb_api_read_uint64 */
 			assert(0);
@@ -369,7 +369,7 @@
 	assert(m_col->type_len == 8 || m_col->type_len == 4
 	       || m_col->type_len == 2 || m_col->type_len == 1);
 
-	if (m_col->attr == IB_COL_UNSIGNED) {
+	if (m_col->attr & IB_COL_UNSIGNED) {
 		if (m_col->type_len == 8) {
 			src = &value;
 
@@ -465,7 +465,7 @@
 	ib_cb_col_get_meta(tpl, field, m_col);
 
 	assert(m_col->type == IB_INT && m_col->type_len == 8
-	       && m_col->attr == IB_COL_UNSIGNED);
+	       && m_col->attr & IB_COL_UNSIGNED);
 
 	src = &value;
 
@@ -515,7 +515,7 @@
 		memcpy(val_buf, value, val_len);
 		val_buf[val_len] = 0;
 
-		if (col_info->col_meta.attr == IB_COL_UNSIGNED) {
+		if (col_info->col_meta.attr & IB_COL_UNSIGNED) {
 			uint64_t int_value = 0;
 
 			int_value = strtoull(val_buf, &end_ptr, 10);
@@ -583,7 +583,7 @@
 		mci_item->is_str = true;
 	} else {
 		if (col_meta.type == IB_INT) {
-			if (col_meta.attr == IB_COL_UNSIGNED
+			if (col_meta.attr & IB_COL_UNSIGNED
 			    && data_len == 8) {
 				mci_item->value_int =
 					innodb_api_read_uint64(&col_meta,
@@ -599,7 +599,7 @@
 			mci_item->value_str = NULL;
 			mci_item->value_len = sizeof(mci_item->value_int);
 			mci_item->is_str = false;
-			mci_item->is_unsigned = (col_meta.attr == IB_COL_UNSIGNED);
+			mci_item->is_unsigned = (col_meta.attr & IB_COL_UNSIGNED);
 		} else {
 
 			mci_item->value_str = (char*)ib_cb_col_get_value(
@@ -641,7 +641,7 @@
 			mci_item->value_str = malloc(50);
 			memset(mci_item->value_str, 0, 50);
 
-			if (col_meta.attr == IB_COL_UNSIGNED) {
+			if (col_meta.attr & IB_COL_UNSIGNED) {
 				uint64_t int_val = 0;
 
 				int_val = innodb_api_read_uint64(&col_meta,
@@ -906,7 +906,7 @@
 				if (data_len == IB_SQL_NULL) {
 					col_value->is_null = true;
 				} else {
-					if (col_meta->attr == IB_COL_UNSIGNED
+					if (col_meta->attr & IB_COL_UNSIGNED
 					    && data_len == 8) {
 						col_value->value_int =
 							innodb_api_read_uint64(col_meta,
@@ -932,7 +932,7 @@
 				if (data_len == IB_SQL_NULL) {
 					col_value->is_null = true;
 				} else {
-					if (col_meta->attr == IB_COL_UNSIGNED
+					if (col_meta->attr & IB_COL_UNSIGNED
 					   && data_len == 8) {
 						col_value->value_int =
 							innodb_api_read_uint64(col_meta,
@@ -961,7 +961,7 @@
 				if (data_len == IB_SQL_NULL) {
 					col_value->is_null = true;
 				} else {
-					if (col_meta->attr == IB_COL_UNSIGNED
+					if (col_meta->attr & IB_COL_UNSIGNED
 					    && data_len == 8) {
 						col_value->value_int =
 							innodb_api_read_uint64(col_meta,