# Index Status Summary

## Existing Indexes (Already Present)

### Task Table ✅
- **`idx_task_cust_store_week`** - `(customer_id, store_code, week_start_date)` ✅ EXISTS
- **`idx_task_normcat_expr`** - `(customer_id, regexp_replace(lower(trim(category)), ...))` ✅ EXISTS  
- **`task_customer_category_idx`** - `(customer_id) INCLUDE (category, created_at)` ✅ EXISTS

### sjreport Table ✅
- **`idx_sj_cust_store_week`** - `(customer_id, store_code, week_start_date)` ✅ EXISTS
- **`idx_sj_normcat_expr`** - `(customer_id, regexp_replace(lower(trim(category)), ...))` ✅ EXISTS
- **`sj_customer_category_idx`** - `(customer_id) INCLUDE (category, created_at)` ✅ EXISTS

## Missing Indexes (Need to Create)

### Task Table
- **`idx_task_name_status`** - Partial index for task name filters (OPTIONAL - for aggregation optimization)

### sjreport Table  
- **`idx_sjreport_dedup`** - Composite index for window function optimization: `(customer_id, store_code, week_start_date, channel, store_name, category, product, variant, size, created_at DESC, id DESC)` (OPTIONAL - for deduplication performance)

### store_user_link Table
- **`idx_store_user_link_store_customer`** - `(store_code, customer_id)` ✅ **RECOMMENDED** - Needed for UPDATE operations in the function

## Conclusion

**Good News!** Most critical indexes already exist. The function should already benefit from:
- ✅ Composite indexes on `(customer_id, store_code, week_start_date)` for both tables
- ✅ Normalized category expression indexes
- ✅ Category lookup indexes

**Only 1 recommended index is missing:**
- `idx_store_user_link_store_customer` - This will help optimize the UPDATE operation in `store_user_link`

The other 2 missing indexes (`idx_task_name_status` and `idx_sjreport_dedup`) are optional optimizations that may provide additional performance gains but are not critical.