I need to delete some old columns of existing table. How to do it using hook_update or Is there some other way to delete old columns in .install file .



You can use function db_drop_field()

 * Implements hook_update_N().
function mymodule_update_7001() {
  db_drop_field('my_table', 'my_column');
  • Could you give an example? – rooby Apr 16 '15 at 11:20
  • Yeah, I updated my post – Eugene Apr 16 '15 at 11:23

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