Initial

migrations/mysql/02108_user_referral.sql

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+-- migrate:up
+ALTER TABLE `user`
+    ADD COLUMN `referral_percentage` TINYINT UNSIGNED NOT NULL DEFAULT 0
+      COMMENT 'Referral Percentage'
+      AFTER `commission`,
+    ADD COLUMN `only_first_purchase` TINYINT(1) NOT NULL DEFAULT 1
+      COMMENT 'Only First Purchase'
+      AFTER `referral_percentage`;
+
+-- migrate:down
+ALTER TABLE `user`
+DROP COLUMN `referral_percentage`,
+DROP COLUMN `only_first_purchase`;