-- +up
CREATE TABLE `positions`
(
    `gid`                  BIGINT UNSIGNED         NOT NULL AUTO_INCREMENT,

    `strategy`             VARCHAR(32)             NOT NULL,
    `strategy_instance_id` VARCHAR(64)             NOT NULL,

    `symbol`               VARCHAR(32)             NOT NULL,
    `quote_currency`       VARCHAR(10)             NOT NULL,
    `base_currency`        VARCHAR(16)             NOT NULL,

    -- average_cost is the position average cost
    `average_cost`         DECIMAL(16, 8) UNSIGNED NOT NULL,
    `base`                 DECIMAL(16, 8)          NOT NULL,
    `quote`                DECIMAL(16, 8)          NOT NULL,
    `profit`               DECIMAL(16, 8)          NULL,

    -- trade related columns
    `trade_id`             BIGINT UNSIGNED         NOT NULL, -- the trade id in the exchange
    `side`                 VARCHAR(4)              NOT NULL, -- side of the trade
    `exchange`             VARCHAR(20)             NOT NULL, -- exchange of the trade
    `traded_at`            DATETIME(3)             NOT NULL, -- millisecond timestamp

    PRIMARY KEY (`gid`),
    UNIQUE KEY `trade_id` (`trade_id`, `side`, `exchange`)
);

-- +down
DROP TABLE IF EXISTS `positions`;