-- 经济指标: 明细数据拆到独立表, 兼容年/季/月/日频率
-- 第一步: 建 IndicatorPoint 表 + Indicator 加元数据列 (data 列暂保留, 由迁移脚本搬运后删除)

-- CreateTable
CREATE TABLE `IndicatorPoint` (
    `id` INTEGER NOT NULL AUTO_INCREMENT,
    `indicatorId` INTEGER NOT NULL,
    `period` VARCHAR(191) NOT NULL,
    `value` DOUBLE NOT NULL,
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updatedAt` DATETIME(3) NOT NULL,

    UNIQUE INDEX `IndicatorPoint_indicatorId_period_key`(`indicatorId`, `period`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- AlterTable: 元数据列 (data JSON 拆出)
ALTER TABLE `Indicator` ADD COLUMN `title` VARCHAR(191) NOT NULL DEFAULT '',
ADD COLUMN `unit` VARCHAR(191) NOT NULL DEFAULT '',
ADD COLUMN `source` VARCHAR(191) NOT NULL DEFAULT '',
ADD COLUMN `frequency` VARCHAR(191) NOT NULL DEFAULT 'month';

-- AddForeignKey
ALTER TABLE `IndicatorPoint` ADD CONSTRAINT `IndicatorPoint_indicatorId_fkey` FOREIGN KEY (`indicatorId`) REFERENCES `Indicator`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;