String 已在mysql上验证查询（带有替换函数），但未在spark sql中传递

我在mysql上验证的原始查询如下：

select substring(replace(substring(order_date, 1,10), '-',''),1, 6) as OrderMonth, c.customer_id, round(sum(oi.order_item_subtotal),2) as MonthlyTotal
from orders o join order_items oi on oi.order_item_order_id = o.order_id
join customers c on c.customer_id = o.order_customer_id
group by substring(replace(substring(order_date, 1,10), '-',''),1, 6), customer_id 
order by sum(oi.order_item_subtotal) desc 
limit 5;

我在Spark中运行时出错：

scala> val final_result = sqlContext.sql(sql_query)
18/03/14 14:03:58 INFO ParseDriver: Parsing command: select substring(replace(substring(order_date, 1,10), '-',''),1, 6) as OrderMonth, c.customer_id, round(sum(oi.order_item_subtotal),2) as MonthlyTotal
from orders o join order_items oi on oi.order_item_order_id = o.order_id
join customers c on c.customer_id = o.order_customer_id
group by substring(replace(substring(order_date, 1,10), '-',''),1, 6), customer_id
order by sum(oi.order_item_subtotal) desc
limit 5
18/03/14 14:03:58 INFO ParseDriver: Parse Completed
org.apache.spark.sql.AnalysisException: undefined function replace; line 4 pos 60

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如何修复该查询？非常感谢。

因此，由于未知原因，replace的字符串函数不被接受，我切换到使用regexp\u replace，它现在正常工作

有人能分享一些见解吗？谢谢