From 4ac935e4788ecd80a8197503ccfe78b8f6b71887 Mon Sep 17 00:00:00 2001
From: avsdev-cw <craig@avsdev.uk>
Date: Thu, 8 Oct 2020 13:17:51 +0100
Subject: [PATCH] NULL string check on escape

---
 src/db_column.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/db_column.c b/src/db_column.c
index ad15d6c..e62a3f3 100644
--- a/src/db_column.c
+++ b/src/db_column.c
@@ -463,7 +463,9 @@ void escapeColumnName_sb(str_builder *sb,
     strbld_char(sb,'.');
   }
   strbld_char(sb,'`');
-  strbld_str(sb, col, col_len);
+  if (col != 0) {
+    strbld_str(sb, col, col_len);
+  }
   strbld_char(sb,'`');
 }