Creating or Modifying a table

Modifying the database schema

Creating a New Table

Creating a new table is done with the SQL CREATE TABLE command. You may provide a .sql file that does this operation with instructions to run the file in Admin > Tools > Install SQL Patches, or you may embed the CREATE TABLE operation in a file that is run automatically in the admin (for example, admin/includes/functions/extra_functions/your-feature.php).

When you create a new table, be sure to create a defined constant for the table name on both the storefront and admin side. Example:

<?php
define('TABLE_PRODUCTS_XSELL', DB_PREFIX . 'products_xsell');

This would go in includes/extra_datafiles/xsell_definitions.php and admin/includes/extra_datafiles/xsell_definitions.php.

Modifying a Table

Changing a table’s structure - adding or removing fields, modifying default values and so forth - is done with the SQL ALTER TABLE command. Again, you may provide a .sql file or automate this action.



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Is there an error or omission on this page? Please post to General Questions on the support forum. Or, if you'd like to open a pull request, just review the guidelines and get started. You can even PR right here.
Last modified November 29, 2021 by Scott C Wilson (4d7f1004).