package mysql import ( "context" "github.com/c9s/rockhopper" ) func init() { AddMigration(upAddPositions, downAddPositions) } func upAddPositions(ctx context.Context, tx rockhopper.SQLExecutor) (err error) { // This code is executed when the migration is applied. _, err = tx.ExecContext(ctx, "CREATE TABLE `positions`\n(\n `gid` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,\n `strategy` VARCHAR(32) NOT NULL,\n `strategy_instance_id` VARCHAR(64) NOT NULL,\n `symbol` VARCHAR(20) NOT NULL,\n `quote_currency` VARCHAR(10) NOT NULL,\n `base_currency` VARCHAR(10) NOT NULL,\n -- average_cost is the position average cost\n `average_cost` DECIMAL(16, 8) UNSIGNED NOT NULL,\n `base` DECIMAL(16, 8) NOT NULL,\n `quote` DECIMAL(16, 8) NOT NULL,\n `profit` DECIMAL(16, 8) NULL,\n -- trade related columns\n `trade_id` BIGINT UNSIGNED NOT NULL, -- the trade id in the exchange\n `side` VARCHAR(4) NOT NULL, -- side of the trade\n `exchange` VARCHAR(12) NOT NULL, -- exchange of the trade\n `traded_at` DATETIME(3) NOT NULL, -- millisecond timestamp\n PRIMARY KEY (`gid`),\n UNIQUE KEY `trade_id` (`trade_id`, `side`, `exchange`)\n);") if err != nil { return err } return err } func downAddPositions(ctx context.Context, tx rockhopper.SQLExecutor) (err error) { // This code is executed when the migration is rolled back. _, err = tx.ExecContext(ctx, "DROP TABLE IF EXISTS `positions`;") if err != nil { return err } return err }