71 lines
5.0 KiB
SQL
71 lines
5.0 KiB
SQL
-- =====================================================================
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-- MCP 只读数据工具 —— 索引脚本（对应方案第 6 章 / 16.4）
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-- 适用：MySQL 8.0+
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--
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-- 【2026-09-23 实测更新】在 oms_test 上核对 information_schema 后发现：
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-- • P0-1 oms_inventory_outer.idx_outer_code(outer_code) —— 已存在，无需执行
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-- • P0-2 oms_inventory_outer_detail.idx_outer_code(outer_code) —— 已存在，无需执行
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-- • P1-1 oms_inventory_inner.idx_order_code(order_code) —— 已存在，无需执行
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-- • P1-2 oms_purchase_order.idx_vendor_id(vendor_id) —— 已存在，无需执行
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-- • P1-3 oms_inventory_info 覆盖索引 —— 缺失，已在 oms_test 执行并实测收益
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-- （建索引耗时 1.3s；按产品聚合 141.8ms → 66.6ms；EXPLAIN 显示 Using index，免回表）
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--
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-- 因此本脚本默认全部注释，仅作为「生产执行前的核对与补建」清单使用。
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-- 执行前请先跑文末的核对语句，确认目标索引是否缺失。
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-- =====================================================================
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-- ---------------------------------------------------------------------
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-- P0 必加（inventory_flow 出库链路依赖；若缺失将导致按出库单号全表扫描）
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-- 实测：oms_test 已存在
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-- ---------------------------------------------------------------------
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-- ALTER TABLE oms_inventory_outer ADD INDEX idx_outer_code (outer_code), ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_inventory_outer_detail ADD INDEX idx_outer_code (outer_code), ALGORITHM=INPLACE, LOCK=NONE;
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-- ---------------------------------------------------------------------
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-- P1 建议
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-- 实测：P1-1 / P1-2 在 oms_test 已存在
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-- ---------------------------------------------------------------------
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-- ALTER TABLE oms_inventory_inner ADD INDEX idx_order_code (order_code), ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_purchase_order ADD INDEX idx_vendor_id (vendor_id), ALGORITHM=INPLACE, LOCK=NONE;
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-- ---------------------------------------------------------------------
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-- P1-3 覆盖索引（库存聚合免回表）
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-- 实测收益显著；但存在写入放大（每次 insert/update 需维护 4 列索引），
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-- 生产库请由 DBA 结合写入量评估后再执行；回滚语句见文末。
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-- oms_test 已于 2026-09-23 执行。
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-- ---------------------------------------------------------------------
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-- ALTER TABLE oms_inventory_info
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-- ADD INDEX idx_pc_status_amt (product_code, inventory_status, inner_price, outer_price),
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-- ALGORITHM=INPLACE, LOCK=NONE;
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-- ---------------------------------------------------------------------
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-- P2 按表规模触发（当前数据量下无需执行；表增长到 10 万+ 或成为热点时再补）
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-- 完整编号清单见方案 6.3 节（P2-1 ~ P2-26，其中 P2-3/P2-4/P2-19 已作废）
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-- ---------------------------------------------------------------------
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-- ALTER TABLE oms_purchase_order_map ADD INDEX idx_order_id (order_id), ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_purchase_order_map ADD INDEX idx_purchase_id (purchase_id), ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_inventory_info ADD INDEX idx_warehouse_id (warehouse_id), ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_stock_info ADD INDEX idx_order_code (order_code), ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_receivable_receipt_detail ADD INDEX idx_write_off_id (write_off_id), ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_payable_payment_detail ADD INDEX idx_write_off_id (write_off_id), ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE bu_todo_completed ADD INDEX idx_approve_user_time (approve_user, approve_time), ALGORITHM=INPLACE, LOCK=NONE;
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-- =====================================================================
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-- 执行前核对：列出目标表当前索引（若目标索引已出现则无需再建）
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-- =====================================================================
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-- SELECT table_name, index_name, GROUP_CONCAT(column_name ORDER BY seq_in_index) AS cols
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-- FROM information_schema.statistics
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-- WHERE table_schema = DATABASE()
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-- AND table_name IN ('oms_inventory_outer','oms_inventory_outer_detail','oms_inventory_inner',
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-- 'oms_purchase_order','oms_inventory_info')
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-- GROUP BY table_name, index_name;
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-- =====================================================================
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-- 回滚（仅在需要撤销新增索引时执行）
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-- =====================================================================
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-- ALTER TABLE oms_inventory_outer DROP INDEX idx_outer_code, ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_inventory_outer_detail DROP INDEX idx_outer_code, ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_inventory_inner DROP INDEX idx_order_code, ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_purchase_order DROP INDEX idx_vendor_id, ALGORITHM=INPLACE, LOCK=NONE;
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-- ALTER TABLE oms_inventory_info DROP INDEX idx_pc_status_amt, ALGORITHM=INPLACE, LOCK=NONE;
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