-- BMS 应收 V1.0
--
-- 需求文档中的来源表 prc_bill / prc_bill_fee 在本项目已经由
-- sql/price/rename_bill_tables.sql 迁移为 prc_order_bill / prc_income_bill_fee；
-- 本脚本只创建正式应收表，不改动来源表及其 VARCHAR(36) 主键。
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

CREATE TABLE IF NOT EXISTS ar_bill (
  ar_bill_id          BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '应收账单ID',
  bill_no             VARCHAR(50) NOT NULL COMMENT '账单号',
  bill_name           VARCHAR(100) NOT NULL COMMENT '账单名称',
  customer_id         BIGINT(20) NOT NULL COMMENT '客户ID',
  customer_code       VARCHAR(50) NOT NULL COMMENT '客户编码快照',
  customer_name       VARCHAR(100) NOT NULL COMMENT '客户名称快照',
  bill_period_start   DATE NOT NULL COMMENT '账期开始日',
  bill_period_end     DATE NOT NULL COMMENT '账期结束日',
  bill_date           DATE NOT NULL COMMENT '账单出具日期',
  currency            VARCHAR(10) NOT NULL DEFAULT 'CNY' COMMENT '币种',
  order_count         INT(11) NOT NULL DEFAULT 0 COMMENT '订单数量',
  total_amount        DECIMAL(18,2) NOT NULL DEFAULT 0.00 COMMENT '账单应收总额',
  written_off_amount  DECIMAL(18,2) NOT NULL DEFAULT 0.00 COMMENT '已核销金额缓存',
  unwritten_amount    DECIMAL(18,2) NOT NULL DEFAULT 0.00 COMMENT '未核销金额缓存',
  status              VARCHAR(30) NOT NULL COMMENT '状态：DRAFT=草稿，CONFIRMED=已确认，PARTIAL_WRITTEN_OFF=部分核销，WRITTEN_OFF=已核销，VOID=已作废',
  generation_status   VARCHAR(20) NOT NULL DEFAULT 'READY' COMMENT '生成状态：GENERATING=生成中，READY=可用，FAILED=生成失败',
  bill_version        INT(11) NOT NULL DEFAULT 1 COMMENT '账单版本',
  bank_account_name   VARCHAR(100) DEFAULT NULL COMMENT '收款账户名称快照',
  bank_account_no     VARCHAR(128) DEFAULT NULL COMMENT '收款账号快照，应用层脱敏展示',
  bank_name           VARCHAR(100) DEFAULT NULL COMMENT '开户行快照',
  remark              VARCHAR(500) DEFAULT NULL COMMENT '备注或作废原因',
  confirmed_by        VARCHAR(64) DEFAULT NULL COMMENT '确认人',
  confirmed_time      DATETIME DEFAULT NULL COMMENT '确认时间',
  create_by           VARCHAR(64) NOT NULL COMMENT '创建人',
  create_time         DATETIME NOT NULL COMMENT '创建时间',
  update_by           VARCHAR(64) NOT NULL COMMENT '更新人',
  update_time         DATETIME NOT NULL COMMENT '更新时间',
  PRIMARY KEY (ar_bill_id),
  UNIQUE KEY uk_ar_bill_no (bill_no),
  UNIQUE KEY uk_ar_bill_customer_cutoff_version (customer_id, currency, bill_period_end, bill_version),
  KEY idx_ar_bill_customer_cutoff (customer_id, currency, bill_period_end),
  KEY idx_ar_bill_status (status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='正式应收账单主表';

CREATE TABLE IF NOT EXISTS ar_bill_generate_task (
  task_id             BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '生成任务ID',
  task_no             VARCHAR(50) NOT NULL COMMENT '生成任务编号',
  ar_bill_id          BIGINT(20) NOT NULL COMMENT '应收账单ID',
  selection_mode      VARCHAR(20) NOT NULL COMMENT '选择模式：EXPLICIT=手动选择，ALL_MATCHED=全选查询结果',
  request_payload     LONGTEXT NOT NULL COMMENT '生成请求快照JSON',
  snapshot_create_time DATETIME DEFAULT NULL COMMENT '来源订单创建时间快照',
  last_source_bill_id VARCHAR(36) DEFAULT NULL COMMENT '来源订单游标',
  total_count         INT(11) NOT NULL DEFAULT -1 COMMENT '待处理订单数，-1表示尚未统计',
  processed_count     INT(11) NOT NULL DEFAULT 0 COMMENT '已处理订单数',
  success_count       INT(11) NOT NULL DEFAULT 0 COMMENT '成功订单数',
  total_amount        DECIMAL(18,2) NOT NULL DEFAULT 0.00 COMMENT '当前生成金额',
  status              VARCHAR(30) NOT NULL COMMENT '任务状态：WAITING=待处理，RUNNING=生成中，SUCCESS=生成成功，FAILED=生成失败，CANCEL_REQUESTED=取消中，CANCELED=已取消',
  error_message       VARCHAR(1000) DEFAULT NULL COMMENT '错误信息',
  request_token       VARCHAR(64) NOT NULL COMMENT '请求幂等标识',
  create_by           VARCHAR(64) NOT NULL COMMENT '创建人',
  create_time         DATETIME NOT NULL COMMENT '创建时间',
  started_at          DATETIME DEFAULT NULL COMMENT '开始时间',
  heartbeat_time      DATETIME DEFAULT NULL COMMENT '最近心跳时间',
  finished_at         DATETIME DEFAULT NULL COMMENT '完成时间',
  PRIMARY KEY (task_id),
  UNIQUE KEY uk_ar_bill_generate_task_no (task_no),
  UNIQUE KEY uk_ar_bill_generate_request_token (request_token),
  KEY idx_ar_bill_generate_status (status, create_time),
  KEY idx_ar_bill_generate_creator (create_by, status, create_time),
  KEY idx_ar_bill_generate_bill (ar_bill_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='应收账单异步生成任务';

CREATE TABLE IF NOT EXISTS ar_bill_detail (
  detail_id           BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '账单订单明细ID',
  ar_bill_id          BIGINT(20) NOT NULL COMMENT '应收账单ID',
  prc_order_bill_id   VARCHAR(36) NOT NULL COMMENT '来源计费订单ID，对应 prc_order_bill.bill_id',
  detail_no           INT(11) NOT NULL COMMENT '账单内顺序号',
  order_no            VARCHAR(64) NOT NULL COMMENT '订单号快照',
  tracking_no         VARCHAR(64) DEFAULT NULL COMMENT '运单号快照',
  transfer_no         VARCHAR(64) DEFAULT NULL COMMENT '转单号快照',
  receive_time        DATETIME DEFAULT NULL COMMENT '收件或入库时间',
  product_code        VARCHAR(50) NOT NULL COMMENT '产品代码快照',
  product_name        VARCHAR(100) DEFAULT NULL COMMENT '产品名称快照',
  goods_description   VARCHAR(500) DEFAULT NULL COMMENT '货物描述快照',
  country_code        CHAR(2) DEFAULT NULL COMMENT '目的国家二字码',
  country_name        VARCHAR(50) DEFAULT NULL COMMENT '目的国家名称',
  dest_postcode       VARCHAR(20) DEFAULT NULL COMMENT '目的邮编',
  actual_weight       DECIMAL(12,3) DEFAULT NULL COMMENT '实际重量KG',
  volume_weight       DECIMAL(12,3) DEFAULT NULL COMMENT '材积重量KG',
  charge_weight       DECIMAL(12,3) DEFAULT NULL COMMENT '计费重量KG',
  pkg_length          DECIMAL(10,2) DEFAULT NULL COMMENT '长度CM',
  pkg_width           DECIMAL(10,2) DEFAULT NULL COMMENT '宽度CM',
  pkg_height          DECIMAL(10,2) DEFAULT NULL COMMENT '高度CM',
  currency            VARCHAR(10) NOT NULL COMMENT '币种快照',
  total_amount        DECIMAL(18,2) NOT NULL DEFAULT 0.00 COMMENT '订单费用合计',
  remark              VARCHAR(500) DEFAULT NULL COMMENT '订单账单备注',
  create_by           VARCHAR(64) NOT NULL COMMENT '创建人',
  create_time         DATETIME NOT NULL COMMENT '创建时间',
  PRIMARY KEY (detail_id),
  UNIQUE KEY uk_ar_bill_detail_source (ar_bill_id, prc_order_bill_id),
  UNIQUE KEY uk_ar_bill_detail_no (ar_bill_id, detail_no),
  KEY idx_ar_bill_detail_source (prc_order_bill_id),
  KEY idx_ar_bill_detail_bill_transfer_no (ar_bill_id, transfer_no),
  CONSTRAINT fk_ar_bill_detail_bill FOREIGN KEY (ar_bill_id) REFERENCES ar_bill (ar_bill_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='应收账单订单快照';

CREATE TABLE IF NOT EXISTS ar_bill_detail_fee (
  detail_fee_id      BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '账单费用明细ID',
  detail_id          BIGINT(20) NOT NULL COMMENT '账单订单明细ID',
  prc_income_bill_fee_id VARCHAR(36) NOT NULL COMMENT '来源收入费用ID，对应 prc_income_bill_fee.fee_id',
  fee_no             INT(11) NOT NULL COMMENT '订单内费用顺序号',
  fee_type           VARCHAR(30) NOT NULL COMMENT '费用类型快照',
  fee_name           VARCHAR(100) DEFAULT NULL COMMENT '费用名称快照',
  sc_id              BIGINT(20) DEFAULT NULL COMMENT '附加费配置ID快照',
  quantity           DECIMAL(12,3) DEFAULT NULL COMMENT '计费数量',
  unit               VARCHAR(20) DEFAULT NULL COMMENT '计费单位',
  unit_price         DECIMAL(15,4) DEFAULT NULL COMMENT '费用单价',
  amount             DECIMAL(18,2) NOT NULL DEFAULT 0.00 COMMENT '费用金额',
  currency           VARCHAR(10) NOT NULL COMMENT '币种',
  calculation_formula VARCHAR(500) DEFAULT NULL COMMENT '计算公式或说明',
  round_mode         VARCHAR(20) DEFAULT NULL COMMENT '取舍规则',
  remark             VARCHAR(500) DEFAULT NULL COMMENT '费用备注',
  create_by          VARCHAR(64) NOT NULL COMMENT '创建人',
  create_time        DATETIME NOT NULL COMMENT '创建时间',
  PRIMARY KEY (detail_fee_id),
  UNIQUE KEY uk_ar_detail_prc_income_fee (detail_id, prc_income_bill_fee_id),
  KEY idx_ar_detail_fee_type (fee_type),
  KEY idx_ar_detail_prc_income_fee (prc_income_bill_fee_id),
  KEY idx_ar_detail_fee_order (detail_id, fee_no, detail_fee_id),
  CONSTRAINT fk_ar_detail_fee_detail FOREIGN KEY (detail_id) REFERENCES ar_bill_detail (detail_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='应收账单费用快照';

CREATE TABLE IF NOT EXISTS ar_export_template (
  template_id       BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '导出模板ID',
  template_code     VARCHAR(50) NOT NULL COMMENT '模板编码，例如 AR_CUSTOMER_BILL',
  template_name     VARCHAR(100) NOT NULL COMMENT '模板名称',
  business_type     VARCHAR(50) NOT NULL COMMENT '业务类型，例如 AR_BILL',
  template_version  VARCHAR(50) NOT NULL COMMENT '模板版本，已启用版本不可覆盖',
  storage_type      VARCHAR(20) NOT NULL DEFAULT 'CLASSPATH' COMMENT '存储类型：CLASSPATH=应用内置资源，FILE=服务器文件，OSS=对象存储，MINIO=MinIO对象存储',
  storage_key       VARCHAR(500) NOT NULL COMMENT '模板文件存储Key或classpath资源路径',
  file_hash         VARCHAR(128) DEFAULT NULL COMMENT '模板文件SHA-256校验值',
  status            VARCHAR(20) NOT NULL DEFAULT 'ENABLED' COMMENT '状态：ENABLED=启用，DISABLED=停用',
  is_default        CHAR(1) NOT NULL DEFAULT '0' COMMENT '是否默认模板：1是0否',
  effective_start   DATE DEFAULT NULL COMMENT '生效开始日期',
  effective_end     DATE DEFAULT NULL COMMENT '生效结束日期',
  remark            VARCHAR(500) DEFAULT NULL COMMENT '备注',
  create_by         VARCHAR(64) NOT NULL COMMENT '创建人',
  create_time       DATETIME NOT NULL COMMENT '创建时间',
  update_by         VARCHAR(64) DEFAULT NULL COMMENT '更新人',
  update_time       DATETIME DEFAULT NULL COMMENT '更新时间',
  PRIMARY KEY (template_id),
  UNIQUE KEY uk_ar_export_template_code_version (business_type, template_code, template_version),
  KEY idx_ar_export_template_default (business_type, status, is_default, effective_start, effective_end)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='应收账单导出模板管理';

INSERT INTO ar_export_template (
  template_code, template_name, business_type, template_version, storage_type, storage_key,
  file_hash, status, is_default, create_by, create_time, remark
)
SELECT
  'AR_CUSTOMER_BILL', '应收账单默认模板', 'AR_BILL', '1.0', 'CLASSPATH',
  'templates/ar/ar_bill_template.xlsx', '735002ac3561e0579b724c0612a2c5ce2d6725bc7fd39c450b0aeff70911a45e', 'ENABLED', '1', 'system', NOW(), '系统内置默认模板'
WHERE NOT EXISTS (
  SELECT 1 FROM ar_export_template
  WHERE business_type = 'AR_BILL'
    AND template_code = 'AR_CUSTOMER_BILL'
    AND template_version = '1.0'
);

CREATE TABLE IF NOT EXISTS ar_bill_export (
  export_id          BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '导出ID',
  ar_bill_id         BIGINT(20) NOT NULL COMMENT '应收账单ID',
  file_name          VARCHAR(255) NOT NULL COMMENT '下载展示名称',
  file_type          VARCHAR(20) NOT NULL COMMENT 'XLSX/PDF',
  template_id        BIGINT(20) DEFAULT NULL COMMENT '提交导出任务时绑定的模板ID',
  template_code      VARCHAR(50) NOT NULL COMMENT '导出模板标识',
  template_version   VARCHAR(50) DEFAULT NULL COMMENT '模板版本',
  template_storage_type VARCHAR(20) DEFAULT NULL COMMENT '绑定模板存储类型',
  template_storage_key  VARCHAR(500) DEFAULT NULL COMMENT '绑定模板存储Key',
  template_hash      VARCHAR(128) DEFAULT NULL COMMENT '绑定模板SHA-256校验值',
  storage_key        VARCHAR(500) NOT NULL COMMENT '对象存储或本地文件Key',
  file_size          BIGINT(20) DEFAULT NULL COMMENT '文件字节数',
  file_hash          VARCHAR(128) DEFAULT NULL COMMENT 'SHA-256校验值',
  row_count          INT(11) DEFAULT NULL COMMENT '导出订单行数',
  export_status      VARCHAR(30) NOT NULL COMMENT '导出状态：PROCESSING=生成中，SUCCESS=成功（可下载），FAILED=失败',
  export_by          VARCHAR(64) NOT NULL COMMENT '导出人',
  export_time        DATETIME NOT NULL COMMENT '导出时间',
  remark             VARCHAR(500) DEFAULT NULL COMMENT '失败原因或备注',
  PRIMARY KEY (export_id),
  KEY idx_ar_bill_export_bill (ar_bill_id, export_time),
  KEY idx_ar_bill_export_template (template_id),
  KEY idx_ar_bill_export_status (export_status),
  CONSTRAINT fk_ar_bill_export_bill FOREIGN KEY (ar_bill_id) REFERENCES ar_bill (ar_bill_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='应收账单导出文件元数据';

CREATE TABLE IF NOT EXISTS ar_bill_log (
  log_id             BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '日志ID',
  ar_bill_id         BIGINT(20) DEFAULT NULL COMMENT '账单ID',
  object_type        VARCHAR(40) NOT NULL COMMENT '对象类型：BILL=应收账单，EXPORT=账单导出，BALANCE_WRITEOFF=余额核销；历史值可能包含已下线模块类型',
  object_id          VARCHAR(64) NOT NULL COMMENT '通用对象ID',
  operation_type     VARCHAR(40) NOT NULL COMMENT '操作类型：CREATE=生成账单，GENERATE=生成校验，CONFIRM=确认账单，VOID=作废账单，EXPORT=导出账单，BALANCE_WRITEOFF=余额核销，CANCEL_BALANCE_WRITEOFF=取消余额核销',
  operation_desc     VARCHAR(500) DEFAULT NULL COMMENT '操作说明',
  from_status        VARCHAR(30) DEFAULT NULL COMMENT '变更前状态',
  to_status          VARCHAR(30) DEFAULT NULL COMMENT '变更后状态',
  before_data        TEXT COMMENT '变更前安全快照',
  after_data         TEXT COMMENT '变更后安全快照',
  operator_id        VARCHAR(64) NOT NULL COMMENT '操作人ID',
  operator_name      VARCHAR(100) DEFAULT NULL COMMENT '操作人名称',
  operation_source   VARCHAR(30) NOT NULL COMMENT '操作来源：WEB=网页端，API=接口，JOB=定时任务，IMPORT=数据导入',
  request_id         VARCHAR(64) DEFAULT NULL COMMENT '请求幂等标识',
  trace_id           VARCHAR(64) DEFAULT NULL COMMENT '链路标识',
  result             VARCHAR(20) NOT NULL COMMENT '执行结果：SUCCESS=成功，FAILED=失败',
  error_message      VARCHAR(1000) DEFAULT NULL COMMENT '失败原因',
  client_ip          VARCHAR(64) DEFAULT NULL COMMENT '来源IP',
  create_time        DATETIME NOT NULL COMMENT '日志时间',
  PRIMARY KEY (log_id),
  KEY idx_ar_bill_log_bill (ar_bill_id, create_time),
  KEY idx_ar_bill_log_object (object_type, object_id, create_time),
  KEY idx_ar_bill_log_request (request_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='应收账单操作日志';

-- ============================================================
-- 兼容已执行旧版本脚本的增量补齐逻辑
-- 本文件是应收账单模块唯一数据库脚本，新库和存量库均可重复执行。
-- ============================================================
SET @ar_db_name := DATABASE();

-- 1. 异步生成任务依赖字段
SET @ar_has_generation_status := (
  SELECT COUNT(*)
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @ar_db_name
    AND TABLE_NAME = 'ar_bill'
    AND COLUMN_NAME = 'generation_status'
);
SET @ar_sql := IF(@ar_has_generation_status = 0,
  'ALTER TABLE ar_bill ADD COLUMN generation_status VARCHAR(20) NOT NULL DEFAULT ''READY'' COMMENT ''生成状态：GENERATING=生成中，READY=可用，FAILED=生成失败'' AFTER status',
  'SELECT 1');
PREPARE ar_stmt FROM @ar_sql;
EXECUTE ar_stmt;
DEALLOCATE PREPARE ar_stmt;

-- 异步生成任务状态增加中文含义，便于数据库运维和排查。
-- 已存在 status 时只修改定义，不重复新增；兼容历史上已创建但字段不完整的任务表。
SET @ar_has_task_status := (
  SELECT COUNT(*)
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @ar_db_name
    AND TABLE_NAME = 'ar_bill_generate_task'
    AND COLUMN_NAME = 'status'
);
SET @ar_sql := IF(@ar_has_task_status = 0,
  'ALTER TABLE ar_bill_generate_task ADD COLUMN status VARCHAR(30) NOT NULL COMMENT ''任务状态：WAITING=待处理，RUNNING=生成中，SUCCESS=生成成功，FAILED=生成失败，CANCEL_REQUESTED=取消中，CANCELED=已取消'' AFTER total_amount',
  'ALTER TABLE ar_bill_generate_task MODIFY COLUMN status VARCHAR(30) NOT NULL COMMENT ''任务状态：WAITING=待处理，RUNNING=生成中，SUCCESS=生成成功，FAILED=生成失败，CANCEL_REQUESTED=取消中，CANCELED=已取消''');
PREPARE ar_stmt FROM @ar_sql;
EXECUTE ar_stmt;
DEALLOCATE PREPARE ar_stmt;

UPDATE ar_bill
SET generation_status = 'READY'
WHERE generation_status IS NULL;

-- 2. 为异步游标查询补充来源订单索引。
-- 来源表可能尚未由价格模块脚本创建，因此这里做存在性判断。
SET @ar_has_source_table := (
  SELECT COUNT(*)
  FROM information_schema.TABLES
  WHERE TABLE_SCHEMA = @ar_db_name
    AND TABLE_NAME = 'prc_order_bill'
);
SET @ar_has_source_cursor_index := (
  SELECT COUNT(*)
  FROM information_schema.STATISTICS
  WHERE TABLE_SCHEMA = @ar_db_name
    AND TABLE_NAME = 'prc_order_bill'
    AND INDEX_NAME = 'idx_bill_ar_async_cursor'
);
SET @ar_sql := IF(@ar_has_source_table = 1 AND @ar_has_source_cursor_index = 0,
  'ALTER TABLE prc_order_bill ADD INDEX idx_bill_ar_async_cursor (customer_id, currency, ar_bill_status, create_time, bill_id)',
  'SELECT 1');
PREPARE ar_stmt FROM @ar_sql;
EXECUTE ar_stmt;
DEALLOCATE PREPARE ar_stmt;

-- 3. 兼容已存在的模板表和导出记录表，补齐模板字段、注释及索引。
ALTER TABLE ar_export_template
  MODIFY COLUMN storage_type VARCHAR(20) NOT NULL DEFAULT 'CLASSPATH'
    COMMENT '存储类型：CLASSPATH=应用内置资源，FILE=服务器文件，OSS=对象存储，MINIO=MinIO对象存储',
  MODIFY COLUMN status VARCHAR(20) NOT NULL DEFAULT 'ENABLED'
    COMMENT '状态：ENABLED=启用，DISABLED=停用';

SET @ar_has_template_id := (
  SELECT COUNT(*)
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @ar_db_name
    AND TABLE_NAME = 'ar_bill_export'
    AND COLUMN_NAME = 'template_id'
);
SET @ar_sql := IF(@ar_has_template_id = 0,
  'ALTER TABLE ar_bill_export ADD COLUMN template_id BIGINT(20) DEFAULT NULL COMMENT ''提交导出任务时绑定的模板ID'' AFTER file_type',
  'SELECT 1');
PREPARE ar_stmt FROM @ar_sql;
EXECUTE ar_stmt;
DEALLOCATE PREPARE ar_stmt;

SET @ar_has_template_storage_type := (
  SELECT COUNT(*)
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @ar_db_name
    AND TABLE_NAME = 'ar_bill_export'
    AND COLUMN_NAME = 'template_storage_type'
);
SET @ar_sql := IF(@ar_has_template_storage_type = 0,
  'ALTER TABLE ar_bill_export ADD COLUMN template_storage_type VARCHAR(20) DEFAULT NULL COMMENT ''绑定模板存储类型'' AFTER template_version',
  'SELECT 1');
PREPARE ar_stmt FROM @ar_sql;
EXECUTE ar_stmt;
DEALLOCATE PREPARE ar_stmt;

SET @ar_has_template_storage_key := (
  SELECT COUNT(*)
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @ar_db_name
    AND TABLE_NAME = 'ar_bill_export'
    AND COLUMN_NAME = 'template_storage_key'
);
SET @ar_sql := IF(@ar_has_template_storage_key = 0,
  'ALTER TABLE ar_bill_export ADD COLUMN template_storage_key VARCHAR(500) DEFAULT NULL COMMENT ''绑定模板存储Key'' AFTER template_storage_type',
  'SELECT 1');
PREPARE ar_stmt FROM @ar_sql;
EXECUTE ar_stmt;
DEALLOCATE PREPARE ar_stmt;

SET @ar_has_template_hash := (
  SELECT COUNT(*)
  FROM information_schema.COLUMNS
  WHERE TABLE_SCHEMA = @ar_db_name
    AND TABLE_NAME = 'ar_bill_export'
    AND COLUMN_NAME = 'template_hash'
);
SET @ar_sql := IF(@ar_has_template_hash = 0,
  'ALTER TABLE ar_bill_export ADD COLUMN template_hash VARCHAR(128) DEFAULT NULL COMMENT ''绑定模板SHA-256校验值'' AFTER template_storage_key',
  'SELECT 1');
PREPARE ar_stmt FROM @ar_sql;
EXECUTE ar_stmt;
DEALLOCATE PREPARE ar_stmt;

SET @ar_has_template_index := (
  SELECT COUNT(*)
  FROM information_schema.STATISTICS
  WHERE TABLE_SCHEMA = @ar_db_name
    AND TABLE_NAME = 'ar_bill_export'
    AND INDEX_NAME = 'idx_ar_bill_export_template'
);
SET @ar_sql := IF(@ar_has_template_index = 0,
  'ALTER TABLE ar_bill_export ADD INDEX idx_ar_bill_export_template (template_id)',
  'SELECT 1');
PREPARE ar_stmt FROM @ar_sql;
EXECUTE ar_stmt;
DEALLOCATE PREPARE ar_stmt;

SET FOREIGN_KEY_CHECKS = 1;