更新Postgresql中的表行需要花费太多时间

Question

我正在尝试更新表中的大约6000行，但我的查询永远不会完成。 我已将数据更新到临时表中并使用连接来更新行。 这在Sql Server中运行得非常快，但在Postgresql中它永远不会完成。 我正在更新大约40列。 这是我正在运行的sql。

UPDATE "STG_magento_de".sales_flat_order
SET customer_id = b.customer_id
    ,created_at = b.created_at
    ,updated_at = b.updated_at
    ,coupon_code = b.coupon_code
    ,box_id = b.box_id
    ,beautytrends_glossydots = b.beautytrends_glossydots
    ,billing_address_id = b.billing_address_id
    ,shipping_address_id = b.shipping_address_id
    ,base_discount_amount = b.base_discount_amount
    ,base_discount_canceled = b.base_discount_canceled
    ,base_discount_invoiced = b.base_discount_invoiced
    ,base_discount_refunded = b.base_discount_refunded
    ,base_grand_total = b.base_grand_total
    ,base_shipping_amount = b.base_shipping_amount
    ,base_shipping_canceled = b.base_shipping_canceled
    ,base_shipping_invoiced = b.base_shipping_invoiced
    ,base_shipping_refunded = b.base_shipping_refunded
    ,base_shipping_tax_amount = b.base_shipping_tax_amount
    ,base_shipping_tax_refunded = b.base_shipping_tax_refunded
    ,base_subtotal = b.base_subtotal
    ,base_subtotal_canceled = b.base_subtotal_canceled
    ,base_subtotal_invoiced = b.base_subtotal_invoiced
    ,base_tax_amount = b.base_tax_amount
    ,base_tax_canceled = b.base_tax_canceled
    ,base_tax_invoiced = b.base_tax_invoiced
    ,base_tax_refunded = b.base_tax_refunded
    ,base_to_global_rate = b.base_to_global_rate
    ,base_to_order_rate = b.base_to_order_rate
    ,base_total_canceled = b.base_total_canceled
    ,base_total_invoiced = b.base_total_invoiced
    ,base_total_invoiced_cost = b.base_total_invoiced_cost
    ,base_total_offline_refunded = b.base_total_offline_refunded
    ,base_total_online_refunded = b.base_total_online_refunded
    ,base_total_paid = b.base_total_paid
    ,base_total_qty_ordered = b.base_total_qty_ordered
    ,base_total_refunded = b.base_total_refunded
    ,increment_id = b.increment_id
    ,order_type = b.order_type
    ,STATUS = b.STATUS
    ,is_chargerun = b.is_chargerun
    ,chargeback_flag = b.chargeback_flag
    ,gift_message_id = b.gift_message_id
    ,dispatch = b.dispatch
FROM "STG_magento_de".sales_flat_order a
JOIN "STG_magento_de".sales_flat_order_temp b ON a.entity_id = b.entity_id

Answer 1

From the manual:

  

请注意，目标表不得出现在from_list中，除非您打算进行自联接（在这种情况下，它必须在from_list中显示别名）。

^{（强调我的）}

所以你真的想要：

UPDATE "STG_magento_de".sales_flat_order
SET customer_id = b.customer_id, 
    ....
from sales_flat_order_temp b  --<< do NOT repeat the target table here
where "STG_magento_de".sales_flat_order = b.entity_id`

^{无关，但是：你应该真的避免使用那些可怕的引用标识符。他们比他们的价值要麻烦得多。}