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Conditionally updating a field based on value changes

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I'm currently working in a local mariadb 10.5.13

I have the following statement which updates PartsInventory and sets a last_modified = file_date

Problem is, I push inventory to another server if it has changed and last_modified indicates the last time we saw the sku, not if the data actually changed. Therefore, I added a second column store_modified and tried to make it a conditional insert (see below) BUT the date never updates

``` INSERT INTO PartsInventory (customer_id, make, part_no, part_desc, source_code, entry_date, last_sale, last_purchase, qoh, qavl, qpr, qps, qrobo, reorder_point, min_qty, max_qty, openro_qty, openro_cost, stock_status, bin1, bin2, 6mth_avg_sales, last_cost, avg_cost, last_pca_date, fm_list_price, base_list_price, base_cost_price, base_trade_price, int_pub_price, height, width, length, weight, movement_code, created, last_modified, store_modified) VALUES ( ?, ?, ?, ?, ?, -- 5 STR_TO_DATE(?, '%d/%m/%y'), -- 1 STR_TO_DATE(?, '%d/%m/%y'), -- 1 STR_TO_DATE(?, '%d/%m/%y'), -- 1 ?, ?, ?, ?, ?, ?, ?, ?, -- 8 ?, ?, ?, ?, ?, ?, ?, ?, -- 8 STR_TO_DATE(?, '%d/%m/%y'), -- 1 ?, ?, ?, ?, ?, ?, ?, ?, -- 8 ?, ?, ?, ?, ? ) -- 5 ON DUPLICATE KEY UPDATE part_desc = COALESCE( VALUES(part_desc), part_desc), source_code = COALESCE( VALUES(source_code), source_code), last_sale = COALESCE( VALUES(last_sale), last_sale), last_purchase = COALESCE( VALUES(last_purchase), last_purchase), qoh = COALESCE( VALUES(qoh), qoh), qavl = COALESCE( VALUES(qavl), qavl), qpr = COALESCE( VALUES(qpr), qpr), qps = COALESCE( VALUES(qps), qps), qrobo = COALESCE( VALUES(qrobo), qrobo), reorder_point = COALESCE( VALUES(reorder_point), reorder_point), min_qty = COALESCE( VALUES(min_qty), min_qty), max_qty = COALESCE( VALUES(max_qty), max_qty), openro_qty = COALESCE( VALUES(openro_qty), openro_qty), openro_cost = COALESCE( VALUES(openro_cost), openro_cost), stock_status = COALESCE( VALUES(stock_status), stock_status), bin1 = COALESCE( VALUES(bin1), bin1), bin2 = COALESCE( VALUES(bin2), bin2), 6mth_avg_sales = COALESCE( VALUES(6mth_avg_sales), 6mth_avg_sales), last_cost = COALESCE( VALUES(last_cost), last_cost), avg_cost = COALESCE( VALUES(avg_cost), avg_cost), last_pca_date = COALESCE( VALUES(last_pca_date), last_pca_date), fm_list_price = COALESCE( VALUES(fm_list_price), fm_list_price), base_list_price = COALESCE( VALUES(base_list_price), base_list_price), base_cost_price = COALESCE( VALUES(base_cost_price), base_cost_price), base_trade_price = COALESCE( VALUES(base_trade_price), base_trade_price), int_pub_price = COALESCE( VALUES(int_pub_price), int_pub_price), height = COALESCE( VALUES(height), height), width = COALESCE( VALUES(width), width), length = COALESCE( VALUES(length), length), weight = COALESCE( VALUES(weight), weight), movement_code = COALESCE( VALUES(movement_code), movement_code), last_modified = VALUES(last_modified), store_modified = IF( (qavl != VALUES(qavl) OR int_pub_price != VALUES(int_pub_price) OR height != VALUES(height) OR width != VALUES(width) OR length != VALUES(length) OR weight != VALUES(weight), VALUES(store_modified), store_modified ) ```

The file changes the qavl AND int_pub_price but the store_modified never changes.

Can I use IF statements in a ON DUPLICATE ... ?

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