[Skip to main content](#vessel-content) # adding a new category; which tables are affected? ## - **[senor\_mike](/forum/user/33975-senor-mike "View senor_mike's Profile")** - [![senor_mike's Avatar](https://www.hikashop.com/media/kunena/avatars/resized/size144/users/avatar33975.jpg)](/forum/user/33975-senor-mike "View senor_mike's Profile") Topic Author - [ Offline](/forum/user/33975-senor-mike) Less More - Posts: 6 - Thank you received: 0 - - 12 years 3 weeks ago [\#174297](#174297) by [senor\_mike](/forum/user/33975-senor-mike "View senor_mike's Profile") *[adding a new category; which tables are affected?](/forum/26-product-category-display/872086-adding-a-new-category-which-tables-are-affected#174297 "I ran into this issue when adding a new category: When i use the joomla admin panel to add a new category, the new cat is listed for me to see. however, when I add categories thru MySQL, I cannot view the new cats using the admin panel. When adding a cat thru the admin panel, are other tables affected? eg. a row is inserted into another table to support the new cat. If this is the case, what are those tables? If this isnt the problem, how can i view the cats added thru MySQL? Thanks in advance for your help.")* was created by *[senor\_mike](/forum/user/33975-senor-mike "View senor_mike's Profile")* I ran into this issue when adding a new category: When i use the joomla admin panel to add a new category, the new cat is listed for me to see. however, when I add categories thru MySQL, I cannot view the new cats using the admin panel. When adding a cat thru the admin panel, are other tables affected? eg. a row is inserted into another table to support the new cat. If this is the case, what are those tables? If this isnt the problem, how can i view the cats added thru MySQL? Thanks in advance for your help. Please [Log in](/login?return=aHR0cHM6Ly93d3cuaGlrYXNob3AuY29tL2ZvcnVtLzI2LXByb2R1Y3QtY2F0ZWdvcnktZGlzcGxheS84NzIwODYtYWRkaW5nLWEtbmV3LWNhdGVnb3J5LXdoaWNoLXRhYmxlcy1hcmUtYWZmZWN0ZWQ/dG1wbD1tYXJrZG93bg==) or [Create an account](/component/users/registration?Itemid=101) to join the conversation. - **[Jerome](/forum/user/80-jerome "View Jerome's Profile")** - [![Jerome's Avatar](https://www.hikashop.com/media/kunena/avatars/resized/size144/users/avatar80.png)](/forum/user/80-jerome "View Jerome's Profile") - [ Offline](/forum/user/80-jerome) - HikaShop core developer Less More - Posts: 26394 - Thank you received: 4078 - - [](http://obsi.dev) - 12 years 3 weeks ago [\#174308](#174308) by [Jerome](/forum/user/80-jerome "View Jerome's Profile") Replied by *[Jerome](/forum/user/80-jerome "View Jerome's Profile")* on topic *[adding a new category; which tables are affected?](/forum/26-product-category-display/872086-adding-a-new-category-which-tables-are-affected#174308 "I ran into this issue when adding a new category: When i use the joomla admin panel to add a new category, the new cat is listed for me to see. however, when I add categories thru MySQL, I cannot view the new cats using the admin panel. When adding a cat thru the admin panel, are other tables affected? eg. a row is inserted into another table to support the new cat. If this is the case, what are those tables? If this isnt the problem, how can i view the cats added thru MySQL? Thanks in advance for your help.")* Hi, If you want to add a category directly in the database, you have to be careful to not break the b-tree. HikaShop categories are like the Joomla categories, they are more than an id, there is a complete tree structure that should be followed. You can read more about Joomla categories or the b-tree algorithm on joomla website or wikipedia. Regards, --- Jerome - Obsidev.com HikaMarket & HikaSerial developer / HikaShop core dev team. 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