- 修复 Firebird 批量插入 varchar 追加空格的问题；#1923

Providers/FreeSql.Provider.Firebird/FirebirdUtils.cs

@@ -89,6 +89,7 @@ namespace FreeSql.Firebird
             if (value == null) return "NULL";
             if (type.IsNumberType()) return string.Format(CultureInfo.InvariantCulture, "{0}", value);
             if (type == typeof(byte[])) return $"x'{CommonUtils.BytesSqlRaw(value as byte[])}'";
+            if (type == typeof(string) && (specialParamFlag == "c" || specialParamFlag == "cu")) return $"cast('{value.ToString().Replace("'", "''")}' as varchar({col.DbSize}))"; //#1923
             return FormatSql("{0}", value, 1);
         }
     }