From 8f5e437a61b813de471dbac64d3b7b230664effd Mon Sep 17 00:00:00 2001
From: maktub <maktub@noreply.gitea.com>
Date: Mon, 21 Jul 2025 18:24:41 +0000
Subject: [PATCH] fix: correct nullable field detection logic in column
 metadata (#2520)

fix: correct nullable field detection logic in column metadata

gbase8s metadata: N  == NOT NULL

Co-authored-by: zhangyunfei <zhangyunfei@gbase.cn>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-on: https://gitea.com/xorm/xorm/pulls/2520
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: maktub <maktub@noreply.gitea.com>
Co-committed-by: maktub <maktub@noreply.gitea.com>
---
 dialects/gbase8s.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dialects/gbase8s.go b/dialects/gbase8s.go
index 05ab7790..d3a8fd22 100644
--- a/dialects/gbase8s.go
+++ b/dialects/gbase8s.go
@@ -871,9 +871,9 @@ func (db *gbase8s) GetColumns(queryer core.Queryer, ctx context.Context, tableNa
 		}
 
 		if nullable != nil && *nullable == "N" {
-			col.Nullable = true
-		} else {
 			col.Nullable = false
+		} else {
+			col.Nullable = true
 		}
 		if comment != nil {
 			col.Comment = *comment